What is the SBIR Program?
SBIR is a federal mandate requiring 11 agencies to award a percentage of their R&D budgets to small businesses. It deployed $4.4 billion in grants and contracts in FY2022, Source: SBA FY2022 SBIR/STTR Annual Report (sbir.gov) and was reauthorized on April 13, 2026 through September 30, 2031 after a six-month program lapse. Source: S. 3971, Small Business Innovation and Economic Security Act of 2026, signed April 13, 2026 Phase I awards run up to $323,090 for feasibility work. Phase II runs up to $2,153,927 for full development. Phase III carries no SBIR money at all. No equity is taken. No cost-sharing is required.
There is no minimum company age. The SBIR and STTR eligibility rules test three things — the type of firm, its ownership, and its employee count — and the date of incorporation is not among them. The SBA's own guidance goes further: “You do not have to certify eligibility until the time of award, and most agencies allow you to submit an application prior to establishing the business that will receive the award.” A company incorporated in 2024, or in 2026, or not yet incorporated at all, can apply to NSF SBIR, NIH SBIR or DoD SBIR on exactly the same footing as a ten-year-old firm. Source: SBA, sbir.gov FAQ → Eligibility Requirements, read August 27, 2026
SBIR by the numbers, and what GrantCompass tracks
State SBIR/STTR match programs stretch your federal award further
Sixteen state SBIR/STTR match programs across 15 states pay a second, non-dilutive award on top of a federal SBIR or STTR award. They stack with the federal Phase I and Phase II award rather than replacing it, and their ceilings vary by two orders of magnitude — $5,000 at Utah's UTIF microgrant, $500,000 at Hawaiʻi's HSBIR match. Which of them is accepting applications on any given day changes constantly; the SBIR/STTR windows that are open right now are tracked on a separate, continuously updated page.
Alabama Innovation Grant (SBIR/STTR State Match)
Innovate Alabama's match for companies with a federal SBIR/STTR award or a strong pending application.
LaunchTN SBIR/STTR Matching Fund
Tennessee's matching program tops up federal Phase I and Phase II awards for Tennessee-based companies.
Kentucky SBIR-STTR Matching Funds Program
KY Innovation's match program for Kentucky small businesses with a federal SBIR/STTR award.
West Virginia SBIR/STTR Matching Grant Program
Administered with the WV Small Business Development Center and the In-Tech Program.
SCRA Technology Startup and Acceleration Grants
South Carolina Research Authority's non-dilutive grants for early-stage deep-tech companies, incorporation required.
I-Corps at NIH
Commercialization training for NIH SBIR/STTR Phase I awardees, run by NIH's SEED office.
SBIR/STTR Technical and Business Assistance (TABA)
Add-on funding layered onto a federal SBIR/STTR award for market research, IP protection, and commercialization help.
The SBIR set-aside is a statutory tax on federal R&D budgets, not a discretionary grant fund
Congress created the SBIR program in 1982 through the Small Business Innovation Development Act. Every federal agency with an extramural R&D budget above $100,000,000 must run an SBIR program and obligate not less than 3.2% of that budget to awards to small business concerns. Every agency with an extramural R&D budget above $1,000,000,000 must additionally run an STTR program and obligate not less than 0.45%. Both are floors: an agency may exceed them. Eleven agencies currently participate: the Department of Defense, HHS (including NIH), DOE, NSF, NASA, USDA, EPA, DHS, DOT, the Department of Commerce (NIST and NOAA), and the Department of Education. Source: SBA, sbir.gov/participating-agencies, read August 27, 2026
The set-aside is what makes SBIR structurally different from a normal federal grant. A discretionary grant fund can be zeroed out in a budget cycle; the SBIR percentage is attached to whatever an agency's extramural R&D budget happens to be, so the pool scales with the agency. That is why the Department of Defense — listed by the SBA as the Department of War (DOW) as of August 2026 — runs a $2.3 billion SBIR/STTR program while the EPA runs a $5 million one: neither number was set by a grant-making decision, and both are a fixed percentage of very different research budgets.
The program has three phases. Phase I is a feasibility award: prove the idea can work technically. Phase II is a development award: build a working prototype or product. Phase III is commercialization, and it carries no SBIR dollars at all. GrantCompass tracks 25 federal SBIR and STTR award lines across those 11 agencies, and 16 state match programs that layer on top.
The April 13, 2026 reauthorization runs to 2031 and added a $30 million Strategic Breakthrough award
The SBIR and STTR programs were reauthorized on April 13, 2026 through September 30, 2031 by the Small Business Innovation and Economic Security Act of 2026 (S. 3971). Source: Congress.gov, S. 3971, signed into law April 13, 2026 Statutory authority had expired on September 30, 2025, and the six-month lapse halted the issuance of new awards across every participating agency. Existing awards continued to be administered throughout; what stopped was new solicitations and new obligations.
The 2026 law is not a straight extension. It creates a new Strategic Breakthrough funding vehicle sitting above Phase II with a ceiling of $30 million per award — roughly 14 times the $2,153,927 Phase II maximum — structured either as a single award or as a sequence of milestone-triggered payments over a performance period of no more than 48 months. It is not an entry point: an applicant must already hold at least one prior Phase I or Phase II award, must secure matching funds equal to 100% of the award amount, and must supply market research demonstrating the technology's effectiveness. Source: Crowell & Moring LLP client alert, “SBIR/STTR Programs Reauthorized After Six-Month Lapse,” read August 27, 2026
Two further changes matter to a first-time applicant. Agencies must now screen applicants and key personnel for foreign affiliations, investment ties, licensing arrangements and joint ventures with entities in a country of concern — a burden that lands on the cap table, not just the technology. And from fiscal year 2027, each agency sets its own cap on how many Phase I and Phase II proposals one business may submit.
Expert Deep-Dive: History, Scale, and How SBIR Actually Funds Innovation
Why the 1982 set-aside exists, and what it deploys today
The SBIR program was born from a specific frustration: federal R&D dollars were almost entirely captured by large defense contractors and universities, with almost nothing reaching early-stage startups. The 1982 law changed the math by mandating a set-aside. Today that set-aside produces more pre-seed and seed-stage funding for technology startups than any single venture capital firm in the country.
By the numbers: in FY2022, SBIR deployed $4.4 billion across roughly 6,000 Phase I and Phase II awards. The related STTR program (which requires a research institution partner) deployed an additional $662 million. Source: SBA FY2022 SBIR/STTR Annual Report (sbir.gov) The published FY2026 agency budgets on sbir.gov sum to roughly $4.28 billion, with the Department of Defense at $2.3 billion, HHS (NIH and its sister agencies) at $1.2 billion, DOE at $349 million, and NASA and NSF at $174 million each.
What "non-dilutive" actually means in SBIR context, and how long your data is protected
SBIR awards are grants (NSF, USDA, and part of HHS), contracts (Department of Defense, NASA, DHS, DOT, EPA, Department of Education), or other transaction agreements (DOE). In none of those cases does the agency take equity in the company. There is no board seat, no preferred stock, no ownership stake, and no cost-share requirement. The awardee owns and has full right and title to the data it develops under an SBIR award.
The government does receive limited rights to use that data, and the window is much longer than most founders assume. The SBIR/STTR Protection Period — the period during which agencies must protect properly marked SBIR data from disclosure — begins at award and, per the SBA Policy Directive, “ends not less than twenty years from that date.” It is 20 years, not four. Data rights may be negotiated with the funding agency, but only after award; an agency may not make a data-rights concession a condition of the award. Source: SBA SBIR/STTR Policy Directive (May 2023) §3(hh) and sbir.gov FAQ → Data Rights, read August 27, 2026
The Phase III vision and why DoD evaluators score it in Phase I
Phase III is where the SBIR program measures its own success, and it is the only phase with no SBIR money and no dollar ceiling — unlike Phase I at $323,090 and Phase II at $2,153,927. Many founders treat it as vague future aspiration. Department of Defense evaluators treat it as a scoring criterion right now, in Phase I. When the Army or Air Force funds a Phase I, it expects a credible theory of how the technology transitions into a procurement contract or dual-use commercial product. Companies that plan Phase III from Phase I outperform those that plan it later. The most successful SBIR companies identify their defense customer or commercial buyer before writing their first proposal. The mechanism makes that concrete: a Phase III award to a prior Phase II performer can be issued sole-source, with no new competition, because the Phase I and Phase II competitions already satisfied federal competition requirements.
The role of the SBA: it writes the rules and runs none of the competitions
The Small Business Administration sets SBIR policy and runs no individual program. It sets the award guideline amounts and reviews them annually for inflation, enforces the set-aside percentages, maintains the SBIR Company Registry at sbir.gov, calculates the commercialization benchmarks, and publishes the government-wide solicitation calendar. Each of the 11 participating agencies runs its own competitions under SBA policy rules, and each may award below the SBA ceiling.
As of April 2026, the SBA's published figures are that agencies may issue a Phase I award of up to $323,090 and a Phase II award of up to $2,153,927 without seeking SBA approval. Source: SBA, sbir.gov/about, read August 27, 2026 When agency websites disagree, that SBA figure is the authoritative ceiling and the agency figure is a program choice below it — NASA's $150,000 Phase I is not an error, it is NASA electing to fund more, smaller awards.
SBIR Eligibility Rules
SBIR eligibility tests exactly three things, and the SBA says so in those words: “restrictions on: (1) the type of firm; (2) its ownership structure; and (3) the firm's size in terms of the number of employees.” In practice that means a for-profit business concern with a place of business in the United States, more than 50% directly owned and controlled by US citizens or permanent resident aliens, and no more than 500 employees including all affiliates. The Principal Investigator must be primarily employed by the company — more than half of their working time — at the time of award. Source: SBA, Guide to SBIR/STTR Program Eligibility, September 2024 edition (sbir.gov), read August 27, 2026
Company age, revenue, profitability, credit history, prior awards and home state are not eligibility criteria. Every one of those gets asked about constantly and none of them is in the rule.
There is no minimum company age — a company founded in 2024 or 2026 is fully eligible
No SBIR or STTR eligibility rule sets a minimum company age, a minimum trading history, or a required incorporation date. The SBA's eligibility architecture restricts the type of firm, its ownership, and its employee count; nothing in it references how long the firm has existed. A company incorporated in 2024 applying to NSF SBIR in 2025 or 2026 clears the age question automatically, because there is no age question to clear.
The SBA's own published answer goes one step further than "no minimum age" — it says you can apply before the company exists at all:
“Does the company need to be founded prior to SBIR/STTR proposal submission? You do not have to certify eligibility until the time of award, and most agencies allow you to submit an application prior to establishing the business that will receive the award. However, to avoid potential complications, you should discuss this with the procuring agency's contracts or grants officer before applying.”
U.S. Small Business Administration, sbir.gov FAQ → Eligibility Requirements. Read August 27, 2026.
Two caveats are worth stating plainly rather than hedging around. First, an EIN/TIN is required to receive an award, so the entity must exist by the time the agency makes it. Second, individual agencies may impose their own submission-time requirements that a not-yet-formed company cannot satisfy — a DoD contract award needs a registered entity in DSIP and SAM.gov — which is why the SBA tells you to raise it with the contracting or grants officer first.
Eligibility is tested on the date of award, not the date you apply
The single most useful mechanical fact about SBIR eligibility is when it is measured. The SBA's definition is explicit: “A Small Business Concern (SBC) must satisfy the following conditions on the date of award for both Phase I and Phase II funding agreements.” Applicants self-certify at that point, not at submission. Source: SBA, sbir.gov FAQ → Eligibility Requirements, read August 27, 2026
That timing changes what is actually blocking you. A founder still working full time at a university or a large corporation on the day they submit is not disqualified — the SBA answers that scenario directly with “Yes, however you will be required to certify at the time of award that your firm is an eligible SBC, and that it is the primary place of employment for the proposed project's principal investigator.” With a typical NIH cycle running six to eight months from receipt date to award, that is six to eight months of runway to change employment status, close a cap-table issue, or finish incorporating.
The corresponding risk is symmetrical: an applicant that is eligible on submission day and ineligible on award day gets nothing. SBA's answer to “Will I be penalized if I don't meet the size rule?” is that “applicants that do not meet the eligibility requirements at the time of award will not be eligible to receive an award.” A funding round that hands one investor majority control between submission and award is the classic way this happens.
The size standard is 500 employees, averaged over 12 months — with an explicit rule for firms younger than a year
An SBIR/STTR awardee, together with its affiliates, must not have more than 500 employees. Size is measured as the average number of employees, including employees of all domestic and foreign affiliates, across each pay period of the preceding completed 12 calendar months. Part-time and temporary employees count the same as full-time employees; staff from a temp agency, professional employer organization or leasing concern count; unpaid volunteers do not.
The regulation anticipates young companies by name. Where a firm has not existed for a full year, SBA's method is: “If a concern has not been in business for 12 months, the average number of employees is used for each of the pay periods during which it has been in business.” A company incorporated eight months ago is measured over eight months of pay periods. That provision is the clearest evidence in the regulation that a sub-12-month company was always contemplated as an applicant. Source: SBA, Guide to SBIR/STTR Program Eligibility (September 2024), citing 13 C.F.R. §121.106(b), read August 27, 2026
There is also no revenue test of any kind. The SBA states it flatly: “Is size determined by revenue for SBIR/STTR? No, for SBIR/STTR, size is determined only by the number of employees. There are no revenue limits.” A pre-revenue company and a $40 million-revenue company face the identical size test, and both pass it if they employ fewer than 500 people.
Ownership: more than 50%, held by individuals, and measured fully diluted
The ownership rule is stated as a majority, not a round number: “A majority (more than 50%) of your firm's equity (e.g., stock) must be directly owned and controlled by” US citizens or permanent resident aliens, by other small business concerns that are themselves more than 50% owned and controlled by such individuals, or by a combination of the two. The word most founders get wrong is individuals — it refers only to actual people, never to companies or other legal entities.
Control must sit inside that same eligible ownership block. A cap table where US individuals hold 55% but a foreign parent holds board control through a shareholders' agreement fails the control half of the test even though it passes the equity half.
The measurement basis catches people out more often than the threshold does. SBA reviews ownership on a fully diluted basis: outstanding common, preferred on an as-converted basis, warrants as-exercised, and options that have been assigned to a person or entity, all counted as if exercised. Unassigned, unexercised option-pool shares are excluded. A company that is 52% US-individual-owned on the common stock ledger can drop below 50% once an assigned option pool and a convertible instrument are counted in.
Venture-backed companies: what the §5107 majority-VC authority actually allows
Minority venture ownership never disqualifies an SBIR applicant. Venture capital operating companies (VCOCs), hedge funds and private equity firms may hold minority shares of any SBIR/STTR awardee, provided they do not control the company and their affiliation, if any, does not push the combined headcount over 500.
Majority venture ownership is allowed in two specific shapes, and only those. First, a single VCOC, hedge fund or PE firm may majority-own an awardee if that fund is itself a small business concern more than 50% directly owned and controlled by US citizens or permanent residents — in which case the fund, the awardee and all their affiliates must total 500 employees or fewer. Second, under the majority-VC authority at 15 U.S.C. §638(dd)(1) (§5107 of the SBIR/STTR Reauthorization Act), an awardee may be majority-owned by multiple VCOCs, hedge funds or PE firms so long as no single one of them holds more than 50%. Source: SBA, sbir.gov FAQ → VC Participation, and Guide to SBIR/STTR Program Eligibility (September 2024), read August 27, 2026
Three conditions are attached to that second route and are routinely missed. It applies to SBIR only, never STTR. It applies only at agencies that have elected to use the authority and secured it through the SBA, so it must be checked per agency and per solicitation rather than assumed. And the funds holding the majority must each have a US place of business and be created or organized under US or state law. Applicants relying on this route must file the majority-VC certification with the application, not at award.
Expert Deep-Dive: PI Employment Rules, VC Ownership, and the Affiliate Trap
The PI employment rule, verbatim, and why it precludes a second full-time job
The SBA Policy Directive states the rule directly: for both Phase I and Phase II, “the primary employment of the Principal Investigator/Project Manager must be with the SBC (or the Research Institution – STTR only) at the time of award and during the conduct of the proposed project. Primary employment means that more than one-half of the Principal Investigator/Project Manager's employment time is spent in the employ of the SBC... This precludes full-time employment with another organization.” Deviations are possible but must be approved in writing by the Funding Agreement officer. The rule bites at award, not at submission — which on an NIH cycle leaves 6 to 8 months to change employment status.
That single clause is what stops most academic founders. A professor holding a nine-month faculty appointment cannot be the SBIR PI without changing employment status. STTR exists precisely to solve it: under STTR the PI may be primarily employed at the research institution instead. The full SBIR vs STTR comparison sets out the trade-off that choice carries.
What counts as "primary employment" in practice
Primary employment under SBIR means more than 50% of working time, measured over the period of performance rather than in any single week. A Principal Investigator who works 60 hours per week and devotes 35 of them to the startup qualifies. One who works 50 hours per week and devotes 24 does not. NIH verifies this at award, not only at application. NSF sets a separate quantified floor of at least 20 hours per week of effort at the small business, which can bind even where the “more than half” test is satisfied.
The affiliate trap for corporate spinouts and studio-backed companies
SBA's affiliation rules (13 C.F.R. Part 121) are extensive, and affiliation is about the power to control, not its exercise. SBA identifies nine bases for finding affiliation. Ownership of more than 50% of voting equity creates affiliation outright; below that, SBA may still find affiliation on the totality of the circumstances, though it notes “there is less of a likelihood of finding affiliation with a minority shareholder holding less than 40% of the equity.” Where no one is found to control, SBA deems the board of directors to be in control.
Three specific traps recur for spinouts: options, convertible securities and agreements to merge are given present effect, as though already exercised; a former affiliate's employees are excluded for the entire measurement period once affiliation ceases; and an acquired affiliate's employees are included for the entire measurement period, not just the months after the deal. SBA also flags affiliation by identity of interest, the newly organized concern rule, and the ostensible subcontractor rule — the last of which is exactly how a university that "helps with the proposal" and then performs most of the work can end up an affiliate. A venture studio or university spinout program can push the combined headcount over 500 without anyone intending it.
Venture-backed companies, agency by agency: what to check before you write
The rule is not "NSF says no and DoD says yes." The correct check has three steps. Step one: is any single VCOC, hedge fund or PE firm holding more than 50%? If that fund is itself a US-individual-majority-owned small business, the company is eligible everywhere, and the fund's employees count toward the 500. Step two: if a syndicate of funds together holds more than 50% with none above 50%, eligibility depends entirely on whether the specific agency has elected the §5107 majority-VC authority — SBA maintains the current list of agencies using it, and it applies to SBIR only, never STTR. Step three: if a single fund above 50% is not itself an eligible small business, the company is ineligible regardless of agency.
Why a static VC-eligibility matrix is the wrong thing to rely on
Because the answer turns on an agency-by-agency election that the SBA publishes and updates, the durable advice is to check the current list on sbir.gov and the specific solicitation's certification language rather than to rely on any static matrix, including this one. A company relying on the syndicate route must submit the majority-VC certification with its application, before submission rather than at award — the one place where the "certify at award" rule does not apply. One further asymmetry is worth knowing: if a fund holds a minority share of an awardee and is nonetheless found to be affiliated with it, the awardee is affiliated only with those portfolio companies the fund majority-owns or where it holds a majority of board seats, not with the fund's whole portfolio.
Legal form: sole proprietorships and LLCs are eligible at the program level
The SBIR eligibility rule, unchanged in this respect since the size regulations took effect on January 28, 2013, is far more permissive about legal form than founders expect. The SBA's definition admits a concern “in the legal form of an individual proprietorship, partnership, limited liability company, corporation, joint venture, association, trust or cooperative,” and its FAQ states that SBIR awards “go only to small, for-profit firms that meet the above definition of an SBC. This includes sole proprietorships.” A single-member LLC with no employees other than its founder is a valid SBIR applicant.
Two qualifications apply. A joint venture is eligible only if every party to it independently meets the type, size, ownership and control requirements — the sole exception being an SBA-approved Mentor-Protégé joint venture formed under 13 C.F.R. §125.9. And an individual agency may be stricter than the SBA floor: some Department of Defense components exclude sole proprietors and scrutinise pass-through-only structures, so the legal form that clears the SBA rule can still fail a specific solicitation. Check the solicitation, not just the program rule.
Decision path: am I eligible for SBIR?
Every question below is a criterion the SBA actually tests. Age, revenue, prior awards and home state do not appear.
Decision Tree: Am I Eligible for SBIR?
What the SBIR eligibility rule tests, and what it does not
Most disqualification anxiety attaches to criteria that are not in the regulation. The left column is tested and certified; the right column is asked about constantly and appears nowhere in the SBIR or STTR eligibility rules.
| Criterion | Tested? | The rule, precisely |
|---|---|---|
| Type of firm | Yes | Organized for profit, place of business in the US, operating primarily in the US or making a significant contribution to the US economy |
| Ownership and control | Yes | More than 50% directly owned and controlled by US citizens or permanent resident aliens, or by qualifying small business concerns; measured fully diluted |
| Employee count | Yes | 500 or fewer including all domestic and foreign affiliates, as a 12-month average of pay periods |
| PI primary employment | Yes | More than half the PI's working time with the small business at time of award (or the research institution, STTR only) |
| Registrations | Yes | SAM.gov with a UEI, SBA SBIR Company Registry, agency portal, and an EIN/TIN to receive the award |
| Where the work is performed | Yes | The SBIR/STTR work must be performed in the United States |
Six things founders assume are SBIR eligibility criteria and are not
Each row below is a question we are asked constantly. None of the six appears in the SBIR or STTR eligibility rules at all.
| Assumed criterion | Tested? | What the rule actually says |
|---|---|---|
| Company age or incorporation date | No | Not a criterion. SBA allows application before the business is established; eligibility is certified at award |
| Revenue or profitability | No | “There are no revenue limits.” Size is determined only by employee count |
| Which US state you are in | No | “The state the company is in does not affect eligibility” — only the country does |
| Prior SBIR awards | No | Phase I is open to first-time applicants. The commercialization benchmark only engages above a threshold number of prior awards |
| A PhD, or any degree | No | Not a criterion anywhere in the SBIR or STTR eligibility rules |
| Minority venture investment | No | VCOCs, hedge funds and PE firms may hold minority stakes without affecting eligibility |
Compiled from the SBA Guide to SBIR/STTR Program Eligibility (September 2024), the SBA SBIR/STTR Policy Directive (May 2023), and the sbir.gov Eligibility Requirements, Size Rule and VC Participation FAQs. All read August 27, 2026.
The commercialization benchmark is an eligibility gate — and first-time applicants are exempt
Before making a new Phase I award to a company that has won multiple prior SBIR/STTR awards, every agency must apply two SBA-approved performance standards: a Phase II Transition Rate (a minimum rate of progression from Phase I to Phase II over a set period) and a Commercialization Rate Benchmark (minimum commercialization results from prior awards). A company that fails either is barred from submitting a new Phase I proposal — and any Direct-to-Phase-II proposal — for one year from the determination. It keeps every existing award, and remains free to pursue Phase II and Phase III work; what it loses is the front door. Source: SBA SBIR/STTR Policy Directive (May 2023) §4(a)(7), read August 27, 2026
Who the benchmark actually applies to: firms with more than 20 Phase I awards in five years
The threshold is high enough that it never touches a new entrant. SBA reviews award data on June 1 each year, and the Transition Rate benchmark engages only where a firm has received more than 20 Phase I awards over the past five years, excluding the most recent year. At a 25% agency benchmark, that firm must show at least one Phase II award for every four Phase I awards. A company applying for its first, second or fifth SBIR award is categorically outside the benchmark population. Source: SBA SBIR/STTR Policy Directive (May 2023) §4(a)(7) and sbir.gov FAQ → Performance Benchmarks, read August 27, 2026
Firms that are inside the population can see their own assessment. Benchmark results and eligibility determinations are not published; agencies and SBA view them through secure accounts, and each company can view its own last assessment once it has created a Small Business User account on sbir.gov. A firm that believes its rate was miscalculated may supply the award information and request a reassessment.
The registration stack, not the company's age, is what has a lead time
Registration in the SBA SBIR Company Registry at sbir.gov is required prior to submitting an application, and registering on SAM.gov does not satisfy it — the SBA states plainly that “company registration is required in addition to registration on SAM.” Registering produces an SBC Control ID and a proof-of-registration PDF that agency solicitations ask for, downloadable from the sbir.gov dashboard. The proof-of-registration form has to be refreshed every six months to keep the information current.
An EIN/TIN is required to receive an award, so an unincorporated founder can begin an application but cannot close one. A change of corporate structure, EIN or DUNS does not create a new company in the registry — SBA adds a new record to the existing company for record-keeping. And note the direction of the geography rule: the state a company sits in does not affect eligibility at all, but the SBIR or STTR work itself must be performed in the United States.
The sequencing for a recently formed company is therefore: incorporate and obtain the EIN, start SAM.gov (2–4 weeks, the long pole), register in the SBIR Company Registry (1–3 business days, needs the SAM UEI), then open the agency portal. Four to six weeks is the honest lead time, and none of it depends on how recently the company was founded.
| Requirement | NIH | NSF | DoD | DOE |
|---|---|---|---|---|
| SAM.gov UEI | Required (before award) | Required (before proposal) | Required (before award) | Required (before proposal) |
| SBIR Company Registry | Required | Required (before proposal) | Required | Required |
| Agency-specific portal | eRA Commons | Research.gov | DSIP (dodsbirsttr.mil) | Grants.gov / EERE Exchange |
| Institutional sign-off | Signing Official required | Authorized Org Rep required | Contracting officer signs | Authorized Rep required |
Phase I, Phase II, and Phase III Explained
Phase I is feasibility: 6 to 12 months, up to $323,090 (NIH) or $305,000 (NSF) or $250,000 (DoD), proving your concept works. Phase II is development: 24 months, up to $2,153,927 (NIH) or $1,250,000 (NSF) or $2,000,000 (DoD), building the product. Source: SBA statutory caps, October 2024 inflation adjustment (sbir.gov); individual agency solicitations may set lower program caps Phase III is commercialization: no SBIR money, no statutory cap, funded by private investment or federal procurement. Phase II is a competitive re-application, not an automatic continuation.
Phase I is a feasibility award: normally 6 months for SBIR, 1 year for STTR
The SBA Policy Directive defines Phase I as a solicitation of proposals “to conduct feasibility-related experimental or theoretical R/R&D related to described agency requirements,” whose object is “to determine the scientific and technical merit and feasibility of the proposed effort and the quality of performance of the SBC with a relatively small agency investment before consideration of further Federal support in Phase II.” Two things follow from that wording. Phase I is a test of the company as much as the technology, and it is deliberately small.
Duration is set by directive, not by agency taste: “Period of performance normally should not exceed 6 months for SBIR or 1 year for STTR,” with agencies free to allow longer where a project warrants it. NSF's current Phase I solicitation, NSF 26-510, runs 6 to 18 months, which is at the generous end of that discretion. Agencies may also fund several different proposed solutions to the same problem, so competing directly with another applicant's approach is not disqualifying.
In Phase I the small business must perform a minimum of two-thirds of the research or analytical effort itself. That is the SBIR figure; STTR's split is different and is set out below. Deviations from the SBIR two-thirds rule are possible but require written approval from the Funding Agreement officer.
Phase II continues the Phase I effort and normally runs no more than 2 years
Phase II exists to “continue the R/R&D effort from the completed Phase I,” and its period of performance “normally should not exceed 2 years.” It is a competitive re-application, never an automatic continuation. Only Phase I awardees are eligible for Phase II, with two carve-outs: an agency may cross the programs (an SBIR Phase II following an STTR Phase I, or the reverse), and NIH, the Department of Defense and the Department of Education may issue an SBIR Phase II to a company that received no Phase I award at all — the Direct-to-Phase-II authority.
In Phase II the small business's own share of the work drops: a minimum of one-half of the research or analytical effort, rather than Phase I's two-thirds. That is what makes Phase II the natural place to bring in a university subcontractor, a contract research organization or a manufacturing partner.
Two structural options are widely under-used. A company may receive its Phase II from a different agency than the one that funded Phase I, provided both agencies determine in writing that the topics are the same and both report the awards to SBA. And supplemental awards such as Phase IIB are aggregated with the base Phase II when the agency measures award size, so a supplement is not a way around the ceiling — it is a way to reach it in stages.
Phase III carries no SBIR money, no dollar limit, and no new competition
Phase III is the phase founders most often misunderstand, because it is defined by its funding source rather than its activity. The Policy Directive: “Phase III refers to work that derives from, extends, or completes an effort made under prior SBIR/STTR Funding Agreements, but is funded by sources other than the SBIR/STTR programs.” There is no SBIR set-aside money in Phase III and, correspondingly, “there is no dollar limit associated with Phase III SBIR/STTR awards.”
Three distinct activities count as Phase III work: commercial application of SBIR-funded R&D financed by non-federal capital; SBIR-derived products or services for federal government use, funded by non-SBIR federal money; and continuation of the SBIR work itself, funded by non-SBIR federal money. The second and third are why Phase III is a procurement story at the Department of Defense and a fundraising story almost everywhere else.
The mechanism that makes federal Phase III powerful is a competition waiver written into statute. Because “the competitions for SBIR/STTR Phase I and Phase II awards satisfy any competition requirement” of federal procurement law, an agency may issue a Phase III award to a prior Phase I/II performer sole-source, without a new competition. A Phase III award also retains SBIR status and carries the full SBIR/STTR data rights protection.
Why the published ceilings are $323,090 and $2,153,927: the guideline plus the 50% rule
The figures quoted across the SBIR ecosystem are not arbitrary and they are not "the budget." The statute sets guideline amounts — “Generally, a Phase I award (including modifications) may not exceed $150,000 and a Phase II award (including modifications) may not exceed $1,000,000” — and then permits agencies to “issue an award that exceeds these award guideline amounts by no more than 50%.” SBA reviews both figures every year for inflation and posts the adjusted numbers on sbir.gov.
Run the arithmetic and the familiar numbers fall out exactly. The inflation-adjusted Phase I guideline is $215,393 and the adjusted Phase II guideline is $1,435,951; add the permitted 50% and you get $323,090 and $2,153,927 — the figures the SBA publishes as the maximum an agency may award without seeking SBA approval. Source: SBA SBIR/STTR Policy Directive (May 2023) §7(i), and sbir.gov/about, both read August 27, 2026
An agency can go higher still, but only by exception: it must request a topic-specific waiver from SBA before releasing the solicitation, showing that the award limits would interfere with its research mission and that topic research costs genuinely differ from other areas. SBA decides within 10 business days and the waiver lasts one fiscal year. This is the machinery behind NIH components that publish Phase I limits of $400,000 or $700,000 — those are waived topics, not a different rule.
The four layers of an SBIR award ceiling, in one table
Reading a ceiling as a single number hides the four decisions stacked inside it. The statute sets a base guideline; SBA adjusts it for inflation each year; agencies may add 50% on their own authority; and beyond that a topic-specific waiver is needed. Every published SBIR figure sits on one of these four rungs.
| Layer | Phase I | Phase II | Set by |
|---|---|---|---|
| Statutory guideline, base dollars | $150,000 | $1,000,000 | Statute |
| Guideline, inflation-adjusted | $215,393 | $1,435,951 | SBA, reviewed annually |
| Maximum without SBA approval (guideline + 50%) | $323,090 | $2,153,927 | SBA, published on sbir.gov |
| Above that | Topic waiver | Topic waiver | SBA decision in 10 business days, valid one fiscal year |
| Phase III | No dollar limit; no SBIR funds | Non-SBIR federal or private capital | |
Direct-to-Phase-II exists at NIH, the Department of Defense and the Department of Education
Direct-to-Phase-II lets a company that can evidence Phase I-equivalent feasibility work skip Phase I entirely and compete for Phase II money. The authority is not general. The SBA Policy Directive names the agencies that hold it for SBIR: “The National Institutes of Health (NIH), Department of Defense (DoD) and the Department of Education (DoEd) may issue a Phase II SBIR award to an SBC that did not receive a Phase I SBIR or STTR award for that R/R&D.” NSF does not offer it, and neither does DOE, NASA, USDA, EPA, DHS, DOT or the Department of Commerce.
Within the Department of Defense the Air Force, through AFWERX, is by far the heaviest user of the mechanism, and Army topics use it selectively. The trade is a harder evidentiary burden at submission: instead of proposing feasibility work, a Direct-to-Phase-II applicant has to document that the feasibility work is already done, usually with prior funded work, test data or a working prototype. It suits a company arriving from a commercial or privately funded R&D history, not a company arriving from an idea.
A Direct-to-Phase-II proposal is also inside the commercialization benchmark's scope: a firm barred by the benchmark loses access to both new Phase I and new Direct-to-Phase-II submissions for a year, while remaining free to pursue ordinary Phase II and Phase III work.
Phase caps by agency: where each agency actually sits below the SBA ceiling
The SBA sets the ceiling; individual agencies operate at or below it based on their own budgets and program designs. NIH sets Phase I at $323,090 and Phase II at $2,153,927 in total costs including indirect. Source: NIH PA-24-245 SBIR Omnibus Solicitation NSF sets Phase I at $305,000 as a fixed-amount award with all costs inclusive, and Phase II at $1,250,000. Source: NSF 26-510 SBIR/STTR Phase I solicitation, posted May 22, 2026 (seedfund.nsf.gov) The Department of Defense publishes a Phase I range of $50,000 to $250,000 and a Phase II range of $800,000 to $1.83 million. DOE publishes $200,000 to $300,000 for Phase I and $1.1 million to $2 million for Phase II.
Phase II is always a competitive re-application. Phase I success does not entitle a company to Phase II funding. At NIH the Phase II application returns to the same peer-review study section that scored Phase I. At NSF, only invited Phase I awardees may apply. At the Department of Defense, transition rates vary substantially by component and topic area.
The instrument differs as much as the number. NSF, USDA and part of HHS award grants; the Department of Defense, NASA, DHS, DOT, EPA and the Department of Education award contracts; DOE uses other transaction agreements. A contract brings FAR cost principles, milestone payments and a contracting officer; a grant brings a program officer and a negotiated indirect rate. Budget for the difference before choosing an agency on ceiling alone.
Expert Deep-Dive: Phase II Strategy, Supplements, and the Path to Phase III
The Phase I to Phase II gap is a commercialization test, not a technical one
The gap between Phase I success and Phase II success is where many good technologies die. Phase I gives you the proof that your concept works. Phase II asks a harder question: can you build something a real customer would pay for? The best Phase I applications already answer this question in the commercialization plan. Reviewers want to see a named potential customer, evidence of market need, and a credible technology development roadmap, not just a list of experiments.
The structural reason the gap exists is that the two phases are scored on different things — and the step up is roughly 6.7×, from $323,090 to $2,153,927 at NIH. Phase I is a feasibility test with a relatively small agency investment. Phase II is an investment decision about a product, made by reviewers who have just read what a dozen other Phase I awardees produced with the same money. A Phase I that generated data but no customer conversation arrives at that comparison with half an argument.
NSF Phase IIA and IIB supplements add up to $500,000 each
NSF offers supplemental awards on top of the base $1,250,000 Phase II. Phase IIA supplements of up to $500,000 are available for companies that have secured matching private investment (a dollar-for-dollar co-investment from a qualified investor). Phase IIB supplements of up to $500,000 are available for companies with a signed strategic partner agreement. Combined, a single NSF awardee can access up to $2,250,000 across Phase I + II + supplements, making NSF substantially more valuable than its Phase I cap suggests.
One caveat sits in the SBA Policy Directive and is easy to miss: supplemental awards are aggregated with the base Phase II when the agency measures award size. There is no limit on the number of supplements, but there is a limit on the total SBIR dollars that can flow through them, because they count toward the size of the Phase II they attach to. A supplement is a way to reach the ceiling in stages, not a way past it.
NIH Phase I to Phase II timing, and the 6-page results summary
An NIH Phase II is worth up to $2,153,927 over a period that normally does not exceed 2 years, and applications can be submitted once Phase I is complete and results have been written up. NIH generally expects companies to wait until Phase I is done, though some institutes allow Phase II application during the final months of Phase I. The Phase II application must be submitted to the same NIH institute that funded Phase I, unless you obtain prior approval to move to a different institute. The Phase II Research Strategy section requires a 6-page summary of Phase I results -- plan that documentation throughout Phase I, not just at the end.
Department of Defense Phase III: procurement as the real exit
DoD Phase III does not require a new competitive award. Once you are a Phase II awardee, the DoD agency component can issue Phase III sole-source contracts under existing SBIR authority without a new competition. This is the most powerful feature of DoD SBIR: if you build technology an operational unit needs, the contracting path is substantially shorter than for non-SBIR companies. AFWERX's STRATFI and TACFI programs are Phase III mechanisms that have produced some of the largest single awards in SBIR history. Founders who enter DoD SBIR without a specific acquisition program in mind often win Phase I and II but find Phase III never materializes.
| Agency | Phase I Max | Phase II Max | Phase II notes |
|---|---|---|---|
| NIH | $323,090 | $2,153,927 | Peer-reviewed re-application; R44 mechanism |
| NSF | $305,000 | $1,250,000 | Plus Phase IIA/IIB supplements up to $500K each |
| DoD (Army typical) | $250,000 | $2,000,000 (see note) | Contract, not grant; Direct-to-Phase-II available |
| DOE | $200,000 | $1,600,000 | Phase II by invitation after Phase I completion |
| NASA | $150,000 (typical) | $750,000 (typical) | One solicitation per year; varies by topic |
Note on the Department of Defense Phase II figure: individual DoD component solicitations have been written up to $2,000,000, while the SBA's participating-agencies listing published a departmental range of $800,000 to $1.83 million as of August 27, 2026. Both are real; the SBA figure describes the department's typical award band and the $2,000,000 figure describes what a component solicitation can reach. Read the specific solicitation, not either summary.
Phase I ceilings compared: NIH sets the pace, NASA the floor
Among the five agencies with the largest SBIR budgets, Phase I ceilings span from $150,000 at NASA to $323,090 at NIH — a more than 2× difference for the same six-to-twelve-month feasibility stage of work.
The spread is a program design choice, not a budget accident. Every one of these five agencies could award up to the SBA maximum of $323,090; NIH does, NSF comes within $18,090 of it, and NASA deliberately stops at $150,000. An agency that funds smaller Phase I awards funds more of them from the same set-aside, which changes the odds as well as the cheque. Read the bar chart as a statement about each agency's portfolio strategy: NIH buys fewer, deeper feasibility studies; NASA buys more, shallower ones. For a company whose feasibility work genuinely costs $300,000, that difference decides which agency can fund the work at all — and no amount of proposal quality closes a $173,090 gap.
Award ceilings span three orders of magnitude, from $100K to $2.15M
Plotting every major federal Phase I and Phase II ceiling on a single log scale shows the real shape of the SBIR ladder: Phase I awards (orange) cluster under $325K, while Phase II awards (green) jump to the $750K–$2.15M range. Click any program for its full profile.
Positions on a logarithmic scale. Orange dots = Phase I feasibility awards, green dots = Phase II development awards. NSF Phase IIA/IIB supplements (up to $500K each) are not plotted since they are add-ons, not base awards.
Eighteen of the 25 federal SBIR/STTR lines are Phase I entry points
- Phase I awards 18
- Phase II awards 7
The GrantCompass catalog tracks 25 distinct federal SBIR and STTR funding lines across agencies — most (18) are Phase I entry points, because every major agency runs its own Phase I competition, while only the five agencies with the largest budgets (NIH, DoD, NSF, DOE, NASA) plus STTR variants publish a distinct Phase II line. See the full sortable list below, or compare non-dilutive SBIR funding against the federal R&D tax credit and SBA loan programs in our grants vs. loans vs. tax credits guide.
How SBIR ceilings compare with the rest of the US funding landscape
SBIR is routinely described as "the largest non-dilutive source for startups," which is true but unhelpfully vague. Measured against the whole GrantCompass catalog of 736 US funding programs on August 28, 2026, an SBIR Phase I at $323,090 sits between the 60th and 70th percentile of published ceilings, and a Phase II at $2,153,927 between the 80th and 90th. The catalog's median published ceiling is $150,000; 98 programs cap at under $10,000 and 52 at under $5,000.
| Decile of published ceiling | Ceiling at that decile | SBIR reference point |
|---|---|---|
| 10th percentile | $7,800 | — |
| 30th percentile | $30,000 | — |
| 50th percentile (median) | $150,000 | NASA SBIR Phase I is exactly the catalog median |
| 60th percentile | $250,000 | Department of Defense Phase I ceiling |
| 70th percentile | $500,000 | NIH Phase I at $323,090 falls between the 60th and 70th |
| 80th percentile | $1,000,000 | NSF Phase II |
| 90th percentile | $5,000,000 | NIH Phase II at $2,153,927 falls between the 80th and 90th |
GrantCompass catalog, August 28, 2026: 736 programs, 545 with a published ceiling, median $150,000. Fuller landscape figures are on the US small business funding statistics page.
What makes SBIR unusual is the effort, not the ceiling
The more instructive comparison is application cost rather than award size. Across the 730 catalog programs that publish an effort estimate, the median application takes about 12 hours. A first SBIR Phase I at NIH takes 150 to 160 hours — roughly 13× the catalog median — and the GrantCompass record for an NIH Phase II is 220 hours. That ratio, not the $323,090, is what a founder is really deciding about.
Two other structural differences matter. SBIR requires no matching funds, where 141 of the 736 catalog programs do — and the new 2026 Strategic Breakthrough vehicle is the exception that proves it, requiring a 100% match against a ceiling of $30,000,000. And SBIR is national: all 25 federal lines are open to a company in any state, where 310 of the 736 catalog programs are state-level and 44 more are municipal. A company in a state with no SBIR match program — 35 states run none — loses the top-up, not the federal award.
The best Phase for a first-time SBIR applicant is Phase I at NSF or NIH, depending on your technology domain. Phase I is the correct entry point: it requires no prior SBIR award, has a structured application format, and produces a fundable track record that makes Phase II and future awards more achievable. Applying directly to Phase II without a prior Phase I is only viable at agencies that explicitly allow Direct-to-Phase-II (primarily AFWERX and select Army topics), and typically requires prior government contract experience or equivalent proof-of-concept documentation.
Choosing the Right SBIR Agency
The agency whose mission most closely matches your technology's end-use application is the right agency. NIH funds biomedical, health technology, and medical devices. NSF funds deep technology across any domain with no other federal mission home. The Department of Defense funds defense and dual-use technology. DOE funds energy and environmental technology. NASA funds space systems and aerospace. Do not apply to an agency because the cap is higher — apply to the agency whose program officers will believe your technology is directly relevant to their mission.
The eleven participating agencies differ by roughly 460× in annual SBIR budget, from the Department of Defense at $2.3 billion to the EPA at $5 million; by up to 3× in Phase I ceiling, from $100,000 to $323,090; by award instrument (grant, contract, or other transaction agreement); and by whether they accept open topics or only prescribed ones. Five of the eleven run SBIR alone and do not offer STTR at all.
NIH (National Institutes of Health)
Phase I: $323,090 | Phase II: $2,153,927
27 institutes and centers, each with separate topic areas. Three receipt cycles per year: September 5, January 5, April 5. Peer-reviewed by study sections. Program Officers are accessible and should be contacted before applying.
Overall success rate: 15 to 25% depending on institute. NCI Phase I has run as low as 12 to 14% in competitive cycles.
Scale and instrument: HHS — NIH plus its sister agencies — runs a $1.2 billion SBIR/STTR budget, the second largest in the federal government, and awards both grants and contracts. It publishes a Phase I figure of $275,000+ and a Phase II figure of $1.83 million; individual institutes hold topic waivers that go higher. HHS offers STTR as well as SBIR, and NIH is one of only three agencies with Direct-to-Phase-II authority.
NSF (America's Seed Fund)
Phase I: $305,000 | Phase II: $1,250,000 (+supplements)
Required first step: a 3,500-character Project Pitch. Half of pitches receive a full-proposal invitation. Of those, 25% win. Overall yield: approximately 12%. Fixed-amount cooperative agreement, not a reimbursement grant. VC/PE majority ownership disqualifies.
NSF Program Directors take pre-submission calls; use them.
Scale and instrument: NSF runs a $174 million SBIR/STTR budget and awards grants, not contracts — no FAR cost principles, no contracting officer. Its current solicitations are NSF 26-510 (SBIR/STTR Phase I, Phase II and Fast-Track, posted May 22, 2026, Phase I ceiling $305,000 over 6 to 18 months) and NSF 26-511, aimed at enabling technologies including next-generation instrumentation and experimental platforms. NSF funds almost every technology area except clinical trials.
DoD (Department of Defense)
Phase I: up to $250K | Phase II: up to $2M
Three cycles per year. Topic-based: you apply to a specific DoD need, not an open research area. Awards are contracts (FAR-compliant), not grants. Three portals required: SAM.gov, SBIR Registry, and DSIP. Q&A window is critical: read all Q&As before writing your proposal.
Army is most accessible. DARPA is highest prestige and lowest acceptance. AFWERX runs innovative open-topic and Direct-to-Phase-II programs.
Scale and instrument: at $2.3 billion, the Department of Defense — listed by the SBA as the Department of War (DOW) since 2026 — is over half of all SBIR/STTR dollars. It publishes a Phase I range of $50,000 to $250,000 and a Phase II range of $800,000 to $1.83 million across fourteen listed components, from the Air Force, Army and Navy to DARPA, the Missile Defense Agency, SOCOM and the Defense Health Agency. It runs both SBIR and STTR and holds Direct-to-Phase-II authority.
DOE (Department of Energy)
Phase I: $200,000 | Phase II: $1,600,000
Two solicitation releases per year. Topic-based: proposals must respond to a specific open call. Submitted via Grants.gov. Moved to the Office of Technology Commercialization in April 2026. Award decisions typically 5 to 6 months after the deadline.
Strong fit for cleantech founders working on energy storage, grid technology, and advanced manufacturing.
Scale and instrument: DOE runs a $349 million SBIR/STTR budget — third largest — and funds through other transaction agreements rather than grants or contracts, which changes the cost and reporting rules. Its published ranges are $200,000 to $300,000 for Phase I and $1.1 million to $2 million for Phase II, spanning Advanced Scientific Computing Research, Fusion Energy Sciences, Environmental Management, Fossil Energy and ARPA-E. DOE runs STTR alongside SBIR but has no Direct-to-Phase-II authority.
All eleven participating agencies compared: budget, instrument, and Phase I and II amounts
Every figure comes from one source — the SBA's participating-agencies listing — so the columns are comparable. Five of the eleven do not run STTR at all.
| Agency | Annual budget | Programs | Instrument | Phase I | Phase II | Best fit |
|---|---|---|---|---|---|---|
| Department of Defense (listed as Department of War) | $2.3B | SBIR + STTR | Contract | $50,000–$250,000 | $800,000–$1.83M | Defense and dual-use: autonomy, cyber, microelectronics, hypersonics, directed energy |
| Health and Human Services (incl. NIH) | $1.2B | SBIR + STTR | Grant + contract | $275,000+ | $1.83M | Biomedical, digital health, diagnostics, medical devices, therapeutics |
| Department of Energy | $349M | SBIR + STTR | Agreements | $200,000–$300,000 | $1.1M–$2M | Energy, grid, fusion, computing, environmental management, ARPA-E |
| NASA | $174M | SBIR + STTR | Contract | $150,000 | $1M | 17 technology areas: propulsion, avionics, power storage, robotics, comms |
| National Science Foundation | $174M | SBIR + STTR | Grant | $300,000 (NSF 26-510: $305,000) | $1.25M | Almost all technology and market sectors, except clinical trials |
| Department of Agriculture (NIFA) | $42M | SBIR + STTR | Grant | $125,000–$175,000 | $600,000 | Plant and animal production, rural development, aquaculture, biofuels, food science |
| Department of Homeland Security | $15M | SBIR only | Contract | $175,000 | $1M | Borders and maritime security, chem-bio defense, critical infrastructure, explosives detection |
| Department of Commerce (NIST, NOAA) | $15M | SBIR only | Grant | $100,000 | $400,000 | Measurement science and standards (NIST); ocean, weather and climate (NOAA) |
| Department of Education (IES) | $10M | SBIR only | Contract | $250,000 | $1M | Education technology for students, educators, and learners with disabilities |
| Department of Transportation | $9M | SBIR only | Contract | $200,000 | $1M | Highway, rail and transit operating administrations |
| Environmental Protection Agency | $5M | SBIR only | Contract | $100,000 | $400,000 | Air quality, safe chemicals, sustainable materials, clean and safe water |
Source: SBA, sbir.gov/participating-agencies, read August 27, 2026. Budgets sum to approximately $4.28 billion.
Three structural differences that matter more than the ceiling
Award instrument. NSF, USDA and the Department of Commerce award grants. The Department of Defense, NASA, DHS, DOT, EPA and the Department of Education award contracts. DOE uses other transaction agreements. HHS uses both grants and contracts. A grant gives you a program officer, a negotiated indirect-cost rate and reporting; a contract gives you a contracting officer, FAR Part 31 cost principles, milestone-based payments and deliverables you are legally obliged to produce. For a four-person company with no government accounting experience, that difference is worth more than $100,000 of ceiling.
Topic model. NSF is effectively open-topic: it funds "almost all areas of technology and market sectors" and asks whether the research risk is real. The Department of Defense is prescribed-topic: each component publishes numbered topics describing a specific capability gap, and a proposal is scored against that gap rather than against the technology in the abstract. AFWERX Open Topics are the deliberate exception inside DoD. DOE, NASA, USDA, EPA, DHS, DOT and the Department of Education are all prescribed-topic. A company with a general-purpose technology and no defense application has one natural home, and it is NSF.
STTR availability. Only six of the eleven agencies run STTR — the Department of Defense, HHS, DOE, NASA, NSF and USDA. DHS, the Department of Commerce, the Department of Education, DOT and EPA run SBIR alone. If a university co-founder needs to stay in a faculty appointment and be the Principal Investigator, that requirement eliminates five of the eleven agencies before the technology is even discussed. The SBIR vs STTR comparison works through that trade-off in full.
NASA, USDA, and the smaller programs
Beyond the top four, NASA runs one main SBIR solicitation per year covering space systems, propulsion, Earth science instrumentation, and aerospace technology. Phase I is typically $150,000 over 6 months; Phase II is typically $750,000 over 24 months. NASA publishes its solicitation through SBIR.gov and uses a separate agency portal.
USDA runs a smaller SBIR program focused on agricultural technology, rural development, and natural resources. The Department of Commerce, HHS (outside NIH), EPA, and DHS also participate, each with specific topic areas aligned to their missions.
For most startup founders, the right answer is one of the big four: NIH, NSF, DoD, or DOE. If your technology spans multiple domains (for example, an AI tool for drug discovery), you may be able to apply to both NIH (health technology) and NSF (AI/software), but each application must be written specifically for that agency's mission and topic areas. Submitting the same proposal to two agencies without material differences is a policy violation and grounds for disqualification.
Expert Deep-Dive: Within-Agency Selection, Program Officers, and the DARPA Distinction
Choosing the right office inside the agency is a second, separate decision
Choosing the right agency is the first decision. Choosing the right program office or institute within that agency is equally important and is frequently overlooked by first-time applicants. NIH runs 27 institutes and centers under one omnibus solicitation; the Department of Defense lists fourteen components, each publishing its own topics on its own cadence. In both cases the "agency" a founder names is not the entity that actually reads the proposal. Getting the sub-unit wrong produces the same outcome as getting the agency wrong — a technically sound proposal scored by reviewers whose mission it does not serve — and it is a far easier mistake to make, because the sub-units are not listed on the front page of any solicitation.
At NIH: picking your institute matters
NIH has 27 institutes and centers (ICs), each running its own SBIR competition under the shared PHS omnibus solicitation and the same three standard receipt dates — September 5, January 5 and April 5, rolled to the next business day when they fall on a weekend or federal holiday. NCI funds cancer-related technology. NIMH funds mental health technology. NIBIB funds biomedical imaging and bioengineering. NHLBI funds cardiovascular and lung technology. Each IC has its own success rates, priority areas, and program officer contacts. Submitting to the wrong IC is a common and costly mistake. A project on an AI-powered ophthalmology diagnostic should go to NEI (National Eye Institute), not NCI -- even if the applicant's oncology advisor wrote the proposal. Email your target IC's program officer with a one-paragraph summary before applying. The PO response (or lack of one) tells you everything about fit.
Inside the Department of Defense: Army vs. AFWERX vs. DARPA
Army SBIR has the highest topic volume, the broadest eligibility interpretation, and historically higher acceptance rates for well-written proposals. It is the most accessible entry point for defense-tech startups without existing DoD relationships. AFWERX (the Air Force innovation unit) offers Open Topics that do not require a defense-specific technology focus -- any commercially significant dual-use technology can apply. AFWERX also runs the largest Direct-to-Phase-II program. DARPA topics are fundamentally different: they are research bets on breakthrough technology concepts, not near-term product development. DARPA Phase I awards are often larger than typical, with less structured deliverables, but the acceptance rate is extremely low (5 to 10% by practitioner consensus) and successful DARPA performers often already have relationships with the program manager before the solicitation is published.
Program officer contact: the highest-ROI pre-submission action
Every SBIR program office among the 11 participating agencies has accessible points of contact, and the SBA publishes named contacts and email addresses for each of them. At NIH, program officers are explicitly listed on each IC's website and routinely respond to pre-submission inquiries. At NSF, Program Directors take Zoom calls before Project Pitch submission and this is encouraged in the official program materials. At DoD, communication must go through the official Q&A system in DSIP (not direct email or calls), but the Q&A window is designed for this purpose. At DOE, the Science Officer contacts are published per topic. Founders who contact the right program officer before committing 150 hours to a proposal prevent at least 20% of rejection outcomes by verifying fit, scope, and framing before writing.
Decision path: matching a technology to an agency in four questions
Work this top to bottom. It resolves the mission-fit question first, because mission fit — not the size of the ceiling — is what a reviewer scores. Each terminal branch names the agency and its Phase I figure.
Decision Tree: Which SBIR Agency Fits My Technology?
Cadence: how many times a year each agency lets you in
Cadence is the constraint that decides how long a mistake costs you. NIH runs three fixed standard receipt dates a year — September 5, January 5 and April 5 — so a missed NIH cycle costs four months. NASA runs one main solicitation a year, so a missed NASA cycle costs twelve. That single fact should weigh more heavily on agency choice than a $150,000 difference in ceiling, because a year of delay costs a four-person company far more than $150,000 in burn.
The Department of Defense runs three cycles a year across its components, DOE runs two solicitation releases, and NASA runs one main solicitation covering Phase I and Phase II together. Cadence and topic model interact: a prescribed-topic agency with an annual cycle gives a company exactly one chance a year to match a published capability gap, which is a materially harder planning problem than NSF's rolling pitch. The practical consequence for a first-time applicant is that agency choice sets the cost of a mistake: at NIH a misjudged application costs four months, at NASA it costs a year, and at NSF the Project Pitch surfaces the misjudgment in four to eight weeks for the price of 1,500 words.
The NIH weekend-and-holiday rule: the next receipt date is Tuesday, September 8, 2026
NIH's standard dates carry a rule that catches people every few years: when a standard due date falls on a weekend or a federal holiday, it moves to the next business day. September 5, 2026 is a Saturday and Monday September 7, 2026 is Labor Day, so the next NIH standard receipt date is Tuesday, September 8, 2026, at 5:00 p.m. local time of the applicant organization. The same rule applied in 2021, when the September 5 date moved to Tuesday, September 7. Anyone working to a calendar that reads "September 5" for 2026 has the wrong date. Source: NIH Standard Due Dates policy (grants.nih.gov); date arithmetic verified against the 2026 federal holiday calendar, August 27, 2026
NSF gates on the Project Pitch rather than on a date: a pitch must be submitted and invited before a full proposal can go in, and NSF began accepting new Project Pitches against solicitation NSF 26-510 on June 2, 2026. That adds one to two months at the front of the NSF cycle that does not appear on any deadline calendar. Which specific windows are open on any given day is tracked separately on the SBIR/STTR open-now page.
Solicitation calendars at a glance
| Agency | Cycles per year | Typical deadline windows | Notes |
|---|---|---|---|
| NIH | 3 (fixed dates) | September 5 / January 5 / April 5 | Rolls to the next business day on a weekend or federal holiday — next date is Tuesday, September 8, 2026 |
| NSF | Rolling Project Pitch, then windowed full proposals | Pitches accepted continuously; full proposals by invitation | Solicitation NSF 26-510, posted May 22, 2026; pitches reopened June 2, 2026 |
| DoD | 3 (spring / fall / winter) | Spring close June; Fall close Nov; Winter close Mar | Topics vary by component; Q&A window critical |
| DOE | 2 (Release 1 and 2) | Release 1: Jan-Feb; Release 2: June-July | Topics pre-specified; must match open solicitation |
| NASA | 1 main per year | Typically spring (April-June deadline) | One solicitation covers Phase I and II together |
The verdict for a two-person AI startup with no academic or defense ties
The best SBIR agency for a 2-person AI/machine learning startup with no academic affiliation and no defense customer is NSF America's Seed Fund. NSF explicitly funds deep technology where the commercial path is unproven and the core R&D is genuinely risky. The Project Pitch system (3,500 characters, no page count, evaluated in 4 to 8 weeks) gives faster feedback than a full NIH application cycle. NSF's $305,000 fixed-amount award requires no indirect cost negotiation, and the Program Director pre-call is the most accessible pre-submission touchpoint in the SBIR ecosystem. The VC ownership restriction is the only disqualifier to check first.
When the Department of Defense is the wrong agency, even at a higher ceiling
DoD SBIR is NOT worth pursuing if your technology has zero defense application and you are applying only because the Phase II cap ($2M) is higher than NSF ($1.25M). DoD evaluators score on transition potential to DoD acquisition programs. A software product for restaurant inventory management, regardless of technical quality, will not score well against topics written for logistics, ISR systems, or materials testing. The additional $750,000 in Phase II cap is not worth the mismatch penalty in Phase I acceptance rates. Apply to DoD when your technology solves a real defense problem, not just a general technology challenge.
The 7 federal Phase II lines, ranked by ceiling
Only the largest programs publish a distinct Phase II line. Seven of them appear in the GrantCompass catalog, from NASA at $750,000 to NIH at $2,153,927. Click any program for its full profile.
| Program | Agency | Phase | Max award |
|---|---|---|---|
| SBIR Phase II — NIH (PHS Omnibus) | National Institutes of Health | Phase II | $2,153,927 |
| STTR Phase II — NIH (PHS Omnibus) | National Institutes of Health | Phase II | $2,153,927 |
| SBIR Phase II — Department of Defense | Department of Defense | Phase II | Up to $2M |
| SBIR Phase II — Department of Energy | Department of Energy | Phase II | Up to $1.6M |
| STTR Phase II — Department of Energy | Department of Energy | Phase II | Up to $1.1M |
| SBIR Phase II — NSF (America's Seed Fund) | National Science Foundation | Phase II | Up to $1M |
| SBIR Phase II — NASA | NASA | Phase II | Up to $750K |
The 18 federal Phase I entry points, ranked by ceiling
Eighteen Phase I lines span $100,000 at the EPA to $323,090 at NIH.
| Program | Agency | Phase | Max award |
|---|---|---|---|
| SBIR Phase I — NIH (PHS Omnibus) | National Institutes of Health | Phase I | $323,090 |
| STTR Phase I — NIH (PHS Omnibus) | National Institutes of Health | Phase I | $323,090 |
| SBIR Phase I — NSF (America's Seed Fund) | National Science Foundation | Phase I | Up to $305K |
| STTR Phase I — NSF | National Science Foundation | Phase I | Up to $305,000 |
| SBIR Phase I — U.S. Air Force / AFWERX | Air Force (DoD) | Phase I | Up to $250K |
| SBIR Phase I — U.S. Army | Army (DoD) | Phase I | Up to $250K |
| SBIR Phase I — DARPA | DARPA (DoD) | Phase I | Up to $250K |
| SBIR Phase I — Department of Defense | Department of Defense | Phase I | Up to $250K |
| SBIR Phase I — Dept. of Education (IES) | Institute of Education Sciences | Phase I | Up to $250K |
| SBIR Phase I — Missile Defense Agency | MDA (DoD) | Phase I | Up to $250K |
| SBIR Phase I — U.S. Navy / ONR | Navy — ONR (DoD) | Phase I | Up to $250K |
| STTR Phase I — Department of Defense | Department of Defense | Phase I | Up to $250K |
| STTR Phase I — Department of Energy | Department of Energy | Phase I | $200K–$250K |
| SBIR Phase I — Department of Energy | Department of Energy | Phase I | Up to $200K |
| SBIR Phase I — USDA (NIFA) | USDA | Phase I | Up to $175K |
| SBIR Phase I — Dept. of Homeland Security | Homeland Security | Phase I | Up to $150K |
| SBIR Phase I — NASA | NASA | Phase I | Up to $150K |
| SBIR Phase I — EPA | Environmental Protection Agency | Phase I | Up to $100K |
GrantCompass catalog, August 28, 2026.
SBIR vs. STTR: Which One Is Right for You?
SBIR and STTR have identical funding amounts. The difference is whether you need a research institution partner. STTR requires at least 30% of the work to go to a university, nonprofit research org, or federal lab -- and at least 40% must stay with your small business. Source: SBA SBIR/STTR Policy Directive, Section 4(c) STTR Work Requirements (sbir.gov/about/policies) STTR relaxes the PI employment rule: the PI can be primarily employed at the university. SBIR requires the PI to be primarily employed by your company. If your co-founder is a faculty member who cannot leave their university appointment, STTR is the right path.
SBIR and STTR at a glance: identical money, different structure
| Criterion | SBIR | STTR |
|---|---|---|
| Research institution partner required? | No (optional subcontract allowed) | Yes -- at least 30% of work to RI |
| PI primary employment | Must be at small business (>50% time) | May be at the research institution (NIH/DoD); NSF requires 20+ hrs/wk at SB |
| Small business work requirement | At least two-thirds (66.7%) in Phase I; at least one-half in Phase II | At least 40% at the small business, in both Phase I and Phase II |
| Deviation from the work split | Possible — written approval from the Funding Agreement officer | Not allowed — the split is fixed in statute at 15 U.S.C. §638(e) |
| IP agreement required? | No | Yes -- IP Rights Agreement before submission |
| VC majority ownership (NSF) | Disqualifies | Disqualifies (same rule) |
| Best when | Your team is already company-employed, or you are spinning out with no university attachment | Your IP originates in a university lab and the academic co-PI must remain affiliated with the university |
STTR in practice: the 30% subcontract is a statutory floor, not a guideline
STTR's defining feature is the mandatory research institution subcontract. At least 30% of the total Phase I budget must flow to the research institution partner. On a $305,000 Phase I award, that means at least $91,500 of direct costs go to the university lab. The university processes these funds through its own sponsored programs office, which adds institutional overhead. Total cost to the small business: a significant portion of the award never touches the company's bank account.
This makes STTR a better fit when the university partner is doing essential R&D that your company genuinely cannot do itself, not as a workaround to keep a faculty founder's NIH funding active. Using STTR purely to satisfy a faculty advisor's desire to stay involved while the company does all the real work is a pattern reviewers recognize and penalize in the commercialization section.
The IP Rights Agreement negotiation is where most STTR applications slow down. University technology transfer offices have different timelines and legal requirements than startup lawyers. Start negotiations 8 to 10 weeks before the receipt date. Standard NIH and NSF template IP agreements exist; using them accelerates negotiations substantially.
Where the SBIR and STTR work-share rules actually differ
The two programs share one funding ladder and one set of company eligibility rules, and diverge on exactly two mechanics: who must do the work, and where the Principal Investigator may be employed. On the work share, SBIR requires the awardee to perform a minimum of two-thirds of the research or analytical effort in Phase I and a minimum of one-half in Phase II. STTR fixes a different split in both phases: not less than 40% of the R&D work by the small business and not less than 30% by a partnering research institution, leaving up to 30% for anyone else.
The enforcement differs too, and this is the part that gets missed. SBIR's percentages may be deviated from with written approval from the Funding Agreement officer after consultation with the agency program manager. STTR's may not — the Policy Directive states that deviations “are not allowed, as the performance of work requirements are specified in statute at 15 U.S.C. 638(e).” An agency may measure the split by total award dollars or by labor hours, and must say which in the solicitation.
Eligible STTR research institutions are narrower than "a university": the partner must be non-profit, located in the United States, and owned and operated exclusively for scientific or educational purposes — a non-profit college or university, a domestic non-profit scientific or research organization, or a Federally Funded R&D Center. A for-profit contract research organization cannot be the STTR partner, though it can be an ordinary subcontractor. The full side-by-side comparison of the two programs covers agency availability and the choice itself.
The verdict for a faculty-founded biotech company
The best path for a biotech startup where the founding scientist is a tenured professor with a primary NIH-funded lab is STTR, not SBIR. The professor can serve as the research institution's Co-PI without leaving their faculty appointment. The small business Co-Founder who is fully employed by the company serves as the small business PI. The 30% to the university covers the lab work; the 40%+ at the company covers commercialization development. Trying to route this through SBIR by having the professor join the company at 51% effort is legally risky and practically disruptive to the academic career that generates the core IP.
The SBIR Application Process
Every SBIR application requires the same three prerequisites: active SAM.gov registration (2 to 4 weeks to activate), SBA SBIR Company Registry enrollment (1 to 3 days, refreshed every 6 months), and an agency-specific portal account. The application itself contains a technical volume (your research plan), a commercialization plan (how this becomes a product), and a budget. At NIH, the key document is a 1-page Specific Aims written before everything else. At NSF, you start with a 3,500-character Project Pitch. At DoD, you respond to a specific published topic. At DOE, you also respond to a topic from the current solicitation.
The prerequisites are identical whether the award is worth $100,000 at the EPA or $323,090 at NIH, and they are identical for a company founded in 2015 and one founded in 2026. Budget 4 to 6 weeks for the registration stack and 6 to 10 weeks for the writing.
Steps 1 and 2: registrations, then the program officer, before a word is written
Start registrations 4 to 6 weeks before your target deadline
SAM.gov, SBIR Company Registry, and your agency portal account must all be active. SAM.gov is the longest lead time: 2 to 4 weeks for new entities. Do not start writing your proposal before registrations are underway.
Contact the program officer or topic author before writing
NIH publishes program officer contacts for each of its 27 institutes. Email your target institute's program officer with a 1-paragraph summary. At NSF, request a pre-submission call with a Program Director. At DoD, submit written questions through the DSIP Q&A window. At DOE, contact the listed Science Officer for your target topic. This single step prevents the most common application failure: topic misalignment. It costs perhaps 2 hours against an application that will take 100 to 160, and it is the only step where an agency will tell you before the money is spent.
Steps 3 and 4: write the gate document first, then the technical volume
The gate document is different at every agency and it is always short. At NIH it is the one-page Specific Aims. At NSF it is the Project Pitch, four character-limited sections totalling roughly 1,500 words. At the Department of Defense it is the topic Q&A thread. In each case the short document decides whether the long one is ever read, so it is written first and revised most.
Write the 1-page Specific Aims or Project Pitch first
At NIH, the Specific Aims page is the single most important document in the entire application. Write it first. Get feedback from the program officer. Revise until it is tight. At NSF, the 3,500-character Project Pitch is the gate that determines whether you can submit a full proposal. At DoD, read all the Q&As posted by other applicants for your topic before drafting anything.
Write the technical volume with reviewers in mind
NIH reviewers are bench scientists or clinical researchers who move fast. DoD reviewers are often active-duty engineers or GS technical staff. NSF panels include both technical and commercialization experts. Write directly, avoid jargon, and map every section header to the evaluation criteria in the solicitation. If the NOFO has 5 evaluation criteria, your application should address each one explicitly, in the order listed.
Steps 5 and 6: the commercialization plan, and submitting with two days in hand
Commercialization is scored, separately and explicitly, at NIH and NSF. It is the section where technical founders most often lose an application they were otherwise winning, because it is the one section a bench scientist has no practice writing. Submission itself is the other avoidable loss: an application that fails to upload is indistinguishable, in outcome, from one that was never written.
Build a credible commercialization plan
Every SBIR program requires a commercialization plan, but NIH and NSF score it explicitly and separately from the technical merit. A weak commercialization plan drags down otherwise strong applications. A strong plan names a specific target customer (not "the healthcare market"), estimates a market segment with a credible source, identifies 1 to 2 competitors and explains your differentiation, and articulates a clear Phase III path (who buys this, at what price, through what channel).
Submit at least 2 business days before the deadline
Technical systems fail on deadline day. NIH's Grants.gov Workspace and eRA Commons can queue up for hours. DoD's DSIP has crashed during busy close periods. NSF's Research.gov has occasional file-format errors that require resubmission. Build in 2 full business days of buffer. An application that fails to submit is identical in outcome to an application that was never written.
What a strong NIH Specific Aims page contains
Submission portals, document formats and page limits by agency
Each of the 11 participating agencies uses a different portal, a different document structure and a different page limit, and none accepts another's format. NIH runs through Grants.gov Workspace plus eRA Commons with a 6-page Research Strategy against a $323,090 Phase I ceiling. NSF runs through Research.gov with a 15-page Project Description. The Department of Defense runs through DSIP with a separate technical volume and cost volume, typically 20 to 30 pages depending on the topic. DOE runs through Grants.gov or EERE Exchange at around 25 pages. Rewriting an NIH application into a DoD proposal is a genuine rewrite, not a reformat.
| Agency | Submission portal | Key document format | Page limit (Phase I) |
|---|---|---|---|
| NIH | Grants.gov Workspace + eRA Commons | SF424 package + Research Strategy PDF | 6 pages (Research Strategy) |
| NSF | Research.gov (seedfund.nsf.gov portal) | Project Pitch (4 character-limited sections) + full proposal | 15 pages (Project Description) |
| DoD | DSIP (dodsbirsttr.mil) | Technical volume + separate cost volume | 20 to 30 pages (varies by topic) |
| DOE | EERE Exchange or Grants.gov (topic-dependent) | Technical volume + commercialization plan | 25 pages typical |
Common SBIR Rejection Reasons (and How to Avoid Them)
The most common SBIR rejection reasons are: (1) poor topic or institute alignment, meaning reviewers cannot see why your technology fits this agency's mission; (2) weak commercialization narrative, especially at NSF and NIH where it is explicitly scored; (3) inadequate proof of innovation, meaning the proposal does not show clearly why existing approaches fail; (4) PI employment issues (PI not primarily employed at the company); and (5) registration problems discovered too late. Plan to apply twice before your first win.
Four of those five are decided before the writing starts, which is why the 2 hours spent on agency selection matter more than the last 20 hours of the 150-hour draft. Mission alignment is an agency-selection decision, PI employment is a hiring decision, and registrations are a calendar decision. Only the commercialization narrative is genuinely a writing problem — which is why a strong writer working on a badly chosen agency loses to an average writer on a well-chosen one.
What each agency tells you after a decline, and what to do with it
NIH scores on a 1-to-9 scale across five criteria. The Summary Statement received after a scored review is your most valuable asset for improvement. It includes reviewer critiques across Significance, Innovation, Approach, Investigators, and Environment. Resubmission (a single A1 amendment) is allowed and has historically produced higher success rates than new (A0) submissions. Study your Summary Statement before rewriting.
At NSF, declined Project Pitches receive written feedback from the Program Director. Common feedback themes include: "the innovation is incremental rather than transformational," "the commercial potential is not sufficiently demonstrated," and "the principal investigator does not meet the employment requirement." NSF explicitly says that a previously declined pitch on substantially similar work requires a genuinely new approach, not a reframed argument.
At DoD, the most common failure mode is proposal-to-topic mismatch: applicants describe technology they have already built rather than technology the topic is trying to create. DoD topics are written to address a specific capability gap in an operational system. Proposals that do not address that capability gap will not score well, regardless of technical merit.
Expert Deep-Dive: NIH Study Section Scoring, NSF Broader Impacts, and DoD Transition Risk
How NIH study section scoring actually works
At NIH, your application is scored on a 1 to 9 scale (1 = best) across five criteria: Significance (does this matter?), Innovation (is this genuinely new?), Approach (is the science rigorous?), Investigators (can this team execute?), and Environment (do you have the facilities and resources?). The overall impact score is a weighted combination, with Approach typically dominating. The funding threshold varies by institute: a fundable application generally lands inside roughly the top 10% to 15% of scored applications, and the exact percentile cutoff changes each review cycle with available funds. A Phase I at NIH is worth up to $323,090 and a Phase II up to $2,153,927, so the review that produces that percentile is the highest-stakes hour in the process.
Significance scores: the most common first-round killer at NIH
Significance is one of five NIH criteria scored on the same 1-to-9 scale, and it turns on whether the project addresses an important problem and whether the proposed research would advance the field. Applications that score poorly on Significance typically make one of two errors: they are too narrow (they solve a problem that few people have) or too broad (they describe the problem at a population level without explaining why existing solutions fail). The strongest Significance sections identify a specific gap in current clinical practice or scientific knowledge, quantify its scale, and explain precisely why existing approaches cannot close that gap. Note that Significance sits alongside Innovation, Approach, Investigators and Environment on the same 1-to-9 scale, and that Approach usually dominates the overall impact score — so a poor Significance score is rarely fatal on its own, but it is the criterion that most reliably signals a reviewer never bought the premise.
NSF Broader Impacts: a separate, equally weighted criterion, not a checkbox
NSF, running a $174 million SBIR/STTR program, scores Broader Impacts as a separate, equal criterion alongside Intellectual Merit. Many applicants treat it as a compliance checkbox ("we will train graduate students and present at conferences"). Reviewers who read 30 proposals in a weekend recognize this pattern immediately. Strong Broader Impacts sections at NSF SBIR link commercialization outcomes directly to societal benefit: how many jobs does this technology create, what industries does it enable, which underserved populations gain access to capability they currently lack? Specificity beats ambition. "This technology will create 15 direct jobs in a high-unemployment county over 3 years" scores better than "this technology will transform the global market."
Department of Defense transition risk: the most underweighted criterion
Department of Defense evaluators look for Phase III transition potential in Phase I applications because they have seen too many Phase II awardees produce a prototype that no program office ever adopts. With a $2.3 billion annual program and a Phase II range of $800,000 to $1.83 million, the department is buying transitions, not prototypes. The highest-performing DoD SBIR applicants have a named program office contact, a relevant program of record or technology area, and a realistic theory of how Phase III contracting would work before they submit Phase I. This is not required -- you can win Phase I without it -- but applications that demonstrate Phase III visibility score materially better on transition potential, which is an explicit evaluation criterion across most DoD components.
A declined SBIR application is a scored application with feedback attached
Common SBIR Myths Debunked
The most damaging SBIR myth is that "you need a PhD or university affiliation to win." You do not. The SBIR program was designed specifically for private companies, not universities. Many winning founders have bachelor's degrees, industry backgrounds, and no academic co-authors. Other myths: that you need a prior SBIR award to apply (Phase I is open to first-timers), that the money is only for research (commercialization is a scored criterion), and that only large companies with grant writers win (solo founders and 2-person teams win Phase I regularly).
Myth: You need a PhD to win SBIR
False. SBIR requires a qualified Principal Investigator, but "qualified" is defined by relevant expertise, not degree. Founders with bachelor's or master's degrees in engineering, software, or biology win Phase I awards regularly. What reviewers look for is demonstrated technical capability to execute the proposed research: publications, patents, prior prototypes, relevant industry experience, or a strong technical team. A PhD on your team is helpful but not required. DoD in particular rewards demonstrated engineering and operational knowledge over academic credentials.
Myth: SBIR is only for research labs, not commercial startups
False. The explicit goal of SBIR is Phase III commercialization. The commercialization plan is a scored criterion at every agency. NIH, NSF, and DoD all have post-award resources to help awardees find investors, customers, and partners. NSF's I-Corps commercialization training is available within the Phase I budget. The program is designed for startups that want to build products and companies, not for academic labs that want to publish papers.
Myths about who wins: company size, grant writers, and the Phase II assumption
These three myths share a root: they all assume SBIR rewards institutional capacity. The statute is built to do the opposite — it exists because federal R&D money was flowing almost entirely to large contractors and universities, and the set-aside was the correction.
Myth: Only large companies with professional grant writers win
False. The SBIR program has an explicit small business bias built into the statute. Companies with 2 to 10 employees win Phase I awards at NSF, NIH, and DoD every cycle. Many of the program's highest-impact awardees started as solo founders or academic spinouts with no prior grant-writing experience. Professional grant consultants improve your odds of submission quality, but they do not substitute for technical credibility, program officer alignment, and a real innovation. A well-written proposal from a 2-person team that understands the agency's mission will outperform a polished proposal from a 50-person company that doesn't.
Myth: Winning Phase I guarantees you Phase II
False. Phase II is a separate, competitive re-application. At NIH, Phase II applications go back to study section and are scored against other Phase II proposals from other companies. The acceptance rate is similar to Phase I. At NSF, Phase II proposals from invited Phase I awardees win approximately 40 to 50% of the time. At DoD, fewer than 40% of Phase I awardees win Phase II across the program. Plan Phase II from day one of Phase I: document your results, maintain your program officer relationship, and begin drafting commercialization evidence before Phase I ends.
Myths about the money: taxes, equity, and what the award actually costs you
SBIR is described as "free money" often enough that founders under-plan for its real financial mechanics. Two are worth correcting precisely: how the award is taxed, and what the government takes in exchange. On the second, the answer is genuinely nothing in equity — no shares, no board seat, no cost-share — but the government does hold data rights for a minimum of 20 years from award.
Myth: SBIR awards are taxable income you owe federal taxes on immediately
False, mostly. Federal grants received to cover specific project costs are generally not taxable gross income under IRS rules, because they are not compensating for services rendered. However, SBIR-funded salaries paid to founders and employees are normal wages, subject to payroll tax. The 7% SBIR fee (profit) on NIH and DOE awards is taxable. DoD contracts follow different accounting rules under FAR Part 31. Consult a CPA or tax attorney familiar with federal awards before making assumptions. The good news: the Section 41 R&D tax credit applies to wages paid even from SBIR funds.
SBIR Guides by Founder Type
Your specific situation changes which agency to target, which preparation to prioritize, and which mistakes to avoid. Read the section that matches your profile. If your company also qualifies as women-owned, minority-owned, veteran-owned, or 8(a) certified, layer those federal contracting and grant programs on top of SBIR — they are evaluated independently and stack with a Phase I or Phase II award.
The five profiles below differ on three axes: which of the 11 agencies fits, how much of the work is registration versus writing, and what the realistic hour budget is for a first application. All five face the same eligibility rule — 500 employees, more than 50% US individual ownership, no minimum company age. A first-time biotech applicant should plan 150 to 160 hours for an NIH Phase I. A deep-tech founder targeting NSF starts with a 1,500-word Project Pitch instead, and cannot write the full proposal until it is invited.
If You're a First-Time SBIR Applicant in Biotech or Pharma
Your path is NIH, through the PHS Omnibus Solicitation. Before anything else, identify which of the 27 NIH institutes aligns with your disease area: NCI for cancer, NHLBI for cardiovascular, NIMH for mental health, NIBIB for devices and imaging, NCI and NICHD for pediatric applications, and so on. Then email the program officer at that institute with a 1-paragraph summary of your project before writing a single word of the application.
The Specific Aims page is your most critical document. Draft it in week one, share it with the PO, revise based on feedback, then build the 6-page Research Strategy from it. Budget approximately 150 to 160 hours total for your first application: 30 hours on Specific Aims, 80 hours on Research Strategy, 20 hours on budget and justification, 15 hours on administrative forms, 15 hours on revisions.
The most common mistake for first-time biotech applicants: treating the Phase I as a pure science grant rather than a product development grant. Reviewers score Innovation and Significance, yes, but they also want to see a credible Phase III path. Who buys your diagnostic? What does FDA approval require? What is the licensing or partnership model? Answer these in the commercialization plan before reviewers ask.
- Target agency: NIH (27 ICs to choose from)
- Receipt dates: September 5, January 5, April 5
- Phase I cap: $323,090 total costs
- Key document: 1-page Specific Aims (write this first)
- Success rate: 15 to 25% depending on institute
- Plan for resubmission: A1 applications historically outperform A0 at most ICs
If You're a Deep-Tech Founder Targeting NSF America's Seed Fund
NSF is the right agency if your technology is genuinely high-risk and could not easily fit into another agency's specific mission. AI/ML tools for non-health applications, quantum computing, advanced semiconductors, next-generation materials, robotics, and environmental sensors are all solid NSF domains. NSF also funds biotech and life sciences that fall outside NIH's specific health mission. See the broader technology business grants hub for non-SBIR options in the same space.
The Project Pitch is your entry gate. Four sections, each character-limited: Technology Innovation (3,500 chars), Technical Objectives and Challenges (3,500 chars), Market Opportunity (1,750 chars), and Company and Team (1,750 chars). This is approximately 1,500 words total, which sounds short but is harder to write than a 15-page proposal because every word must earn its place. Call an NSF Program Director before submitting -- they take these calls and will tell you whether your pitch language is calibrated for how NSF thinks about innovation.
The NSF-specific gotcha: any company majority-owned by a VC, hedge fund, or PE firm is ineligible. If your last round gave a single investor more than 50% of your equity, check with a lawyer before applying. Also check whether your PI meets NSF's 20-hours-per-week minimum commitment. NSF is stricter on this than NIH or DoD.
- Target agency: NSF (seedfund.nsf.gov)
- Phase I cap: $305,000 fixed-amount (all costs inclusive -- no indirect negotiation needed)
- First step: Project Pitch, not a full proposal
- Overall acceptance: approximately 12% (50% get invited; 25% of those win)
- Phase II supplements: up to $500K IIA + $500K IIB on top of $1.25M Phase II
- Key disqualifier to check: VC majority ownership at entity level
If You're a Defense or Dual-Use Technology Founder Targeting DoD SBIR
DoD SBIR is the largest SBIR program by dollar volume ($2.3 billion annually) and the most complex by process. Three cycles per year. Multiple components (Army, Navy, AFWERX, DARPA, SOCOM, MDA) each running their own topic lists. Award is a contract, not a grant, meaning FAR compliance, milestone payments, and IP data rights clauses apply from day one.
Topic selection is more important at DoD than at any other agency. Read the topic list for the current cycle and find 1 to 2 topics where your technology maps directly to the stated capability gap, not just the technology area. Use the Q&A window to ask the program manager whether your specific approach aligns with what they have in mind. The Q&A answers are posted publicly -- read every other company's questions too, because they reveal what the evaluator is thinking. If your approach is not mentioned or adjacent in the Q&A, your proposal alignment is probably weak.
Three registration systems required: SAM.gov, the SBIR Company Registry, and DSIP (dodsbirsttr.mil). All three are separate. First-timers discover one is missing 48 hours before deadline. Start everything at least 3 weeks early. DSIP specifically sometimes blocks first-time users during high-traffic close periods.
- Target agency: DoD (dodsbirsttr.mil) -- component matters (Army most accessible, DARPA most selective)
- Phase I cap: up to $250,000 (Army), varies by component and topic
- Awards are contracts (FAR Part 31), not grants -- budget accordingly
- Q&A window opens 2 to 4 weeks before close -- do not skip it
- SBIR Data Rights: 4-year protection on your IP post-award
- Transition narrative: build your Phase III customer into Phase I, not later
If You're a Cleantech or Energy Startup Founder Targeting DOE SBIR
DOE is the right agency for technology in energy efficiency, grid modernization, renewables, battery storage, nuclear, carbon capture, hydrogen, and advanced manufacturing with an energy or environmental angle. DOE runs two solicitation releases per year. Topic areas change with each release based on the Office of Technology Commercialization's current priorities, so you must align your application to an open topic in the active solicitation.
DOE Phase I awards cap at $200,000 -- lower than NIH and NSF -- but Phase II at $1,600,000 is competitive, and DOE has historically strong Phase I to Phase II transition rates for cleantech. The program moved from the Office of Science to the Office of Technology Commercialization (OTC) effective April 13, 2026, which changed the program's administrative contacts and emphasis. The current contact for general questions is sbir-sttr@hq.doe.gov.
The DOE solicitation cycle is worth tracking even when no solicitation is open: topic areas are published in advance of the FOA release, allowing you to shape your research plan around what topics are likely to appear. DOE's America's Water Infrastructure Act and Inflation Reduction Act funding have created new topic areas in battery, grid, and industrial decarbonization in recent cycles.
- Target agency: DOE (science.osti.gov/sbir)
- Phase I cap: $200,000 (two releases per year, topic-based)
- Phase II cap: $1,600,000 (by invitation after Phase I completion)
- Submission portal: Grants.gov or EERE Exchange depending on topic
- Moved to Office of Technology Commercialization April 2026
- Stack with Section 41 R&D credit: DOE SBIR-funded wages qualify
If You're a Phase I Awardee Preparing for Phase II
Phase II is where SBIR delivers its full value — up to $2,153,927 at NIH, $1.25 million at NSF, and $800,000 to $1.83 million at the Department of Defense — but the transition requires a different mindset than Phase I. Phase I proved your concept could work. Phase II must prove your product can be built and sold. Reviewers at this stage are more focused on commercialization evidence than technical feasibility. If you have not done any customer discovery during Phase I, you are behind.
At NIH, begin thinking about your Phase II application before Phase I ends. Your Phase II Research Strategy must include a 6-page Phase I results summary -- document your results throughout Phase I, not just at the end. Contact your program officer during Phase I to discuss Phase II timing and scope. NIH generally expects Phase I to be complete before Phase II is submitted, but check with your IC for institute-specific guidance. The Phase II application goes back to study section and is evaluated on the same criteria as Phase I -- treat it as a fresh competition, not a continuation.
Phase II supplements and the DoD re-compete
At NSF, Phase II awardees can access the Phase IIA and Phase IIB supplement programs. Phase IIA requires a matching private investment (dollar-for-dollar from a qualified investor). Phase IIB requires a signed strategic partnership agreement with a potential customer or licensing partner. Both add up to $500,000 each on top of the base Phase II. If you are a Phase I awardee approaching commercialization, these supplements can extend your runway significantly without dilution.
At DoD, the Phase I to Phase II transition requires a re-compete proposal to the same component -- but the relationship you built with the program manager during Phase I is your biggest asset. Document what you delivered, demonstrate Phase III transition potential, and use your Phase I results to show the evaluators that their money produced results worth building on.
- Document Phase I results throughout the project, not just at the end
- Contact your program officer about Phase II timing in the final 3 months of Phase I
- NSF IIA and IIB supplements add up to $500K each with matching investment or partner agreement
- Build customer evidence (letters of intent, pilot agreements, LOIs) during Phase I to strengthen Phase II commercialization plan
- At DoD: Phase III customer identification during Phase I is the single highest-impact Phase II differentiator
Stacking SBIR with the Federal R&D Tax Credit
SBIR grants and the federal Section 41 R&D tax credit can be stacked. SBIR covers project costs. The R&D credit applies to qualifying research wages, including wages paid from SBIR funds. Qualified small businesses with less than $5 million in gross receipts and no taxable income before the prior 5 years can apply up to $500,000 per year of the credit directly against payroll taxes. This is real cash for pre-revenue companies. File Form 6765 with your federal tax return to claim it.
The reason the two stack cleanly is structural rather than clever. An SBIR award is a receipt that covers project costs; the Section 41 credit is a reduction in tax computed on qualified research activity. Nothing in Section 41 disqualifies a wage because a grant paid it. The one place this gets contested is a Department of Defense SBIR contract, where the government has contracted for specific research results — some practitioners treat those costs as “funded research” under IRC §41(d)(4). That question is genuinely unsettled and belongs with a CPA.
How the Section 41 credit and an SBIR award interact
The Section 41 R&D tax credit is a federal tax incentive equal to 20% of qualified research expenditures (QREs) above a base amount, or 14% via the Alternative Simplified Credit (ASC). For startups with no taxable income, the Qualified Small Business (QSB) payroll-tax offset provision allows you to apply up to $500,000 per year of the credit against your employer portion of payroll taxes -- reducing your actual cash outflow each quarter on Form 941.
SBIR wages are qualifying research expenditures under Section 41. If your Phase I SBIR funds the salary of engineers working on the award, those wages count toward your QRE calculation. You claim the credit for those wages on your tax return even though the wages were originally paid from a federal grant. This is not double-dipping: the SBIR grant covers the expense, and the tax credit rewards the qualified research activity.
One restriction: if the government has contracted for specific research results (as in DoD SBIR contracts), some tax practitioners argue those costs are "funded research" and ineligible under IRC 41(d)(4). NIH and NSF grants are generally cleaner for R&D credit purposes because they are classified as grants, not contracts. Confirm with a CPA who has worked with both SBIR awards and Section 41 before claiming both.
A worked stacking example, and the one restriction that applies to DoD contracts
The stack works because the two mechanisms sit in different places. The SBIR award is money received to cover project costs. The Section 41 credit is a reduction in tax owed on qualified research expenditures — and SBIR-funded engineering wages are qualified research expenditures. Claiming both is not double-dipping, because one is a receipt and the other is a tax computation on an activity.
The exception is worth flagging before a founder builds a model on it. Where the government has contracted for specific research results, as in a Department of Defense SBIR contract, some practitioners treat those costs as "funded research" and therefore ineligible under IRC §41(d)(4). NIH and NSF awards are grants and are generally cleaner for this purpose. This is a genuine area of professional disagreement rather than settled law, so it belongs with a CPA who has handled both SBIR awards and Section 41 — not with a spreadsheet assumption.
| Item | Amount | Notes |
|---|---|---|
| NIH Phase I SBIR award | $305,000 | Non-dilutive grant; funds 6 months of R&D work |
| Engineering wages paid from SBIR | $180,000 | 2 engineers x $90K each; primary QRE source |
| Section 41 R&D credit (ASC, 14%) | Up to ~$12,600 | 14% of QREs above base; varies by prior-year spend |
| QSB payroll-tax offset (if eligible) | Up to $500,000/yr cap | Applied against employer payroll taxes quarterly on Form 941 |
| Combined effective funding | SBIR grant + payroll tax reduction | Consult a CPA; DoD contract awards have different treatment |
File Form 6765 in every qualifying year, even a year with no benefit
The mechanics are worth stating precisely, because the payroll-tax offset is what makes the credit useful to a pre-revenue SBIR company. The Section 41 credit equals 20% of qualified research expenditures above a base amount, or 14% under the Alternative Simplified Credit. A company with no taxable income cannot use a credit against income tax — but a Qualified Small Business, meaning under $5 million in gross receipts with no gross receipts before the prior five-year window, may apply up to $500,000 per year of the credit against the employer portion of payroll taxes, quarterly, on Form 941. That converts a paper credit into cash flow in the same year the engineering wages are paid.
Worked example: a 4-person medtech startup's full SBIR stack
A 4-person medical-device startup with no prior federal awards targets NIH, wins Phase I, and stacks it with the R&D credit and a state match. Here is how the numbers assemble, using each program's published caps:
| Move | Program | What the published numbers say |
|---|---|---|
| Win the feasibility award | NIH SBIR Phase I | Up to $323,090 for 6–12 months of feasibility work; peer-reviewed, 15–25% success rate depending on institute |
| Claim the R&D credit on SBIR-funded wages | Section 41 R&D credit | Up to $500,000/yr can offset employer payroll taxes for a qualified small business, even pre-revenue |
| Add state matching dollars (if in-state) | State SBIR match program | Several states (Alabama up to $250,000, Tennessee up to $100K Phase I) top up a federal award — check your state |
| Re-apply for the development award | NIH SBIR Phase II | Up to $2,153,927 for 24 months; competitive re-application, roughly 40–50% of Phase I awardees win |
None of these dollars are dilutive — no equity changes hands at any step. The SBIR award and the R&D credit are claimed on entirely separate mechanisms (a grant vs. a tax filing), which is why they stack cleanly.
Realistic Timeline: Idea to First SBIR Check
The realistic timeline from deciding to apply to receiving a first payment is 9 to 14 months, and the receipt dates that anchor it are fixed: NIH takes applications on September 5, January 5 and April 5 each year, with the next standard date being Tuesday, September 8, 2026. Registration (4 to 6 weeks), proposal writing (6 to 10 weeks), review period (2 to 6 months depending on agency), award negotiations (1 to 3 months), and payment setup (2 to 4 weeks). Most first-time applicants take 2 to 3 cycles to win their first award. Total realistic time from "we should try SBIR" to "money in the bank" for a first-time applicant is 18 to 30 months.
| Agency | Application to award decision | Award to first payment | Full cycle (submit to check) |
|---|---|---|---|
| NIH | 6 to 8 months | 4 to 6 weeks | 7 to 9 months |
| NSF | 5 to 7 months (incl. Pitch review) | 2 to 4 weeks | 6 to 8 months |
| DoD | 6 to 9 months from close | 1 to 3 months (contract negotiations) | 7 to 12 months |
| DOE | 5 to 6 months | 4 to 8 weeks | 6 to 8 months |
Why SBIR should be additional runway, never substitute runway
Every SBIR number on one screen, with its source and the date we read it
SBIR figures circulate detached from their dates, which is how a 2019 Phase I ceiling ends up in a 2026 pitch deck. Every number below carries the document it came from and the date that document was read. Where a figure is set by statute in base-year dollars and then adjusted for inflation, both versions appear, because agencies quote whichever suits their solicitation.
Three tables follow: the money, the rules, and the clock. Between them they cover every figure this guide relies on, from the $323,090 Phase I ceiling published by the SBA in April 2026 down to the 0.45% STTR set-aside written into 15 U.S.C. §638. Nothing here is modelled, averaged or estimated. Where a number is genuinely not published — agency-by-agency approval rates being the main example — it is absent rather than guessed.
The money: award ceilings, guideline amounts, and the new 2026 vehicle
| Figure | Amount | Source, and date read |
|---|---|---|
| Phase I maximum without SBA approval | $323,090 | SBA, sbir.gov/about, April 2026 figures — read Aug 27, 2026 |
| Phase II maximum without SBA approval | $2,153,927 | SBA, sbir.gov/about, April 2026 figures — read Aug 27, 2026 |
| Phase I guideline, inflation-adjusted | $215,393 | Derived: the published maximum divided by 1.5 — Aug 27, 2026 |
| Phase II guideline, inflation-adjusted | $1,435,951 | Derived: the published maximum divided by 1.5 — Aug 27, 2026 |
| Phase I statutory guideline, base dollars | $150,000 | SBA Policy Directive (May 2023) §7(i)(1) — read Aug 27, 2026 |
| Phase II statutory guideline, base dollars | $1,000,000 | SBA Policy Directive (May 2023) §7(i)(1) — read Aug 27, 2026 |
| Strategic Breakthrough award ceiling (new in 2026) | $30,000,000 | S. 3971, signed April 13, 2026, via Crowell & Moring alert — read Aug 27, 2026 |
| Phase III dollar limit | None | SBA Policy Directive (May 2023) §7(i)(3) — read Aug 27, 2026 |
| SBIR deployed, FY2022 | $4,400,000,000 | SBA FY2022 SBIR/STTR Annual Report |
| STTR deployed, FY2022 | $662,000,000 | SBA FY2022 SBIR/STTR Annual Report |
| Sum of the 11 agencies' published annual budgets | ~$4,280,000,000 | SBA participating-agencies listing — read Aug 27, 2026 |
The rules: percentages, thresholds and periods
These are the figures that decide eligibility and structure rather than size of cheque. Six of the ten are set in statute and cannot be waived by an agency; the SBIR performance-of-work split is the notable exception, and even that requires written approval from the Funding Agreement officer.
| Rule | Value | Source, and date read |
|---|---|---|
| SBIR set-aside, agencies with extramural R&D over $100,000,000 | 3.2% minimum | SBA Policy Directive (May 2023) §2(b) — read Aug 27, 2026 |
| STTR set-aside, agencies with extramural R&D over $1,000,000,000 | 0.45% minimum | SBA Policy Directive (May 2023) §2(d) — read Aug 27, 2026 |
| Size standard, including all affiliates | 500 employees | SBA Eligibility Guide (Sept 2024) — read Aug 27, 2026 |
| Ownership by US individuals, fully diluted | More than 50% | SBA Eligibility Guide (Sept 2024) — read Aug 27, 2026 |
| Revenue limit | None | SBA, sbir.gov FAQ → Size Rule — read Aug 27, 2026 |
| Minimum company age | None | SBA, sbir.gov FAQ → Eligibility Requirements — read Aug 27, 2026 |
| SBIR work performed by the awardee, Phase I | Two-thirds (66.7%) | SBA Policy Directive (May 2023) §4(a)(2) — read Aug 27, 2026 |
| SBIR work performed by the awardee, Phase II | One-half (50%) | SBA Policy Directive (May 2023) §4(a)(2) — read Aug 27, 2026 |
| STTR split: small business / research institution | 40% / 30% minimum | 15 U.S.C. §638(e), via SBA Policy Directive — read Aug 27, 2026 |
| PI primary employment with the awardee | More than 50% of working time | SBA Policy Directive (May 2023) §4(a)(3) — read Aug 27, 2026 |
The clock: periods of performance, review windows and deadlines
Duration figures are where SBIR planning most often goes wrong, because the statutory norms and the agency practice differ. The Policy Directive says a Phase I “normally should not exceed 6 months for SBIR or 1 year for STTR” and a Phase II “normally should not exceed 2 years” — but agencies may extend where a project warrants it, and NSF's 2026 Phase I runs 6 to 18 months. Treat the directive figures as the default and the solicitation as the truth.
| Period | Length | Source, and date read |
|---|---|---|
| Phase I period of performance, SBIR | Normally 6 months | SBA Policy Directive (May 2023) §7(h)(2) |
| Phase I period of performance, STTR | Normally 1 year | SBA Policy Directive (May 2023) §7(h)(2) |
| Phase I period of performance, NSF 26-510 | 6 to 18 months | NSF solicitation 26-510, posted May 22, 2026 |
| Phase II period of performance | Normally 2 years | SBA Policy Directive (May 2023) §7(h)(3) |
| Strategic Breakthrough performance period | Up to 48 months | S. 3971, signed April 13, 2026 |
| SBIR/STTR data protection period from award | Not less than 20 years | SBA Policy Directive (May 2023) §3(hh) |
| SBA decision on a topic award-size waiver | 10 business days; valid 1 fiscal year | SBA Policy Directive (May 2023) §7(i)(4) |
| Commercialization benchmark assessment date | June 1 each year | SBA, sbir.gov FAQ → Performance Benchmarks |
| Company Registry proof-of-registration refresh | Every 6 months | SBA Eligibility Guide (Sept 2024) |
| Next NIH standard receipt date | Tuesday, September 8, 2026 | NIH standard dates Sept 5 / Jan 5 / Apr 5, rolled for the weekend and Labor Day |
| Programs reauthorized through | September 30, 2031 | S. 3971, signed April 13, 2026 |
Find the Right Federal Funding for Your Startup
GrantCompass tracks 736 US funding programs, of which 44 are SBIR or STTR lines — 25 federal award lines, 3 federal add-on programs, and 16 state match programs across 15 states. Across the whole catalog the median published ceiling is $150,000, 404 programs were open on August 28, 2026, and 141 require matching funds. SBIR sits at the demanding end of that distribution: high ceilings, long cycles, and a real technical review.
The free eligibility check maps a company's stage, technology area, ownership profile and state onto that catalog and returns the programs it actually qualifies for, ranked. It exists because the expensive mistake in non-dilutive funding is rarely a badly written application — it is 150 hours spent on the wrong program.
Check My Eligibility FreeFrequently Asked Questions About SBIR
These nine questions are the ones GrantCompass is asked most often about SBIR, and the answers below are the short versions of the sections above. Every dollar figure reflects the SBA's published April 2026 amounts — Phase I up to $323,090, Phase II up to $2,153,927 — and every eligibility statement reflects the SBA Guide to SBIR/STTR Program Eligibility (September 2024 edition) and the sbir.gov eligibility FAQ, both read on August 27, 2026. Where a rule differs by agency, the answer says which agency.
One answer is worth stating before the list, because it is by far the most common question and the most commonly answered wrongly elsewhere: there is no minimum company age for SBIR or STTR, no minimum trading history, and no revenue requirement. Eligibility is certified at the time of award, not at submission.
What is the SBIR program and who is it for?
The short answer: a statutory set-aside, open to any for-profit US small business
SBIR stands for Small Business Innovation Research. It is a federal program requiring 11 agencies to set aside a percentage of their R&D budgets for awards to small businesses. The program deployed $4.4 billion through SBIR plus $662 million through STTR in FY2022. Source: SBA FY2022 SBIR/STTR Annual Report (sbir.gov) It was reauthorized on April 13, 2026 through September 30, 2031 (S. 3971, Small Business Innovation and Economic Security Act of 2026). Source: Congress.gov, S. 3971
Phase I awards range from $200,000 (DOE) to $323,090 (NIH) depending on the agency. Phase II ranges from $1,250,000 (NSF) to $2,153,927 (NIH). No equity is taken. No cost-sharing is required. The program is designed for for-profit small businesses with 500 or fewer employees, at least 51% owned by US citizens or permanent residents, with a Principal Investigator primarily employed by the company.
What is the difference between SBIR Phase I, Phase II, and Phase III?
The short answer: feasibility, then development, then commercialization with no SBIR money
Phase I is the feasibility award: 6 to 12 months, up to $323,090 at NIH or $305,000 at NSF, to prove your concept works. Phase II is the development award: 24 months, up to $2,153,927 at NIH or $1,250,000 at NSF, to build a working prototype or product. Phase II is a competitive re-application, not an automatic continuation. About 40 to 50% of Phase I awardees win Phase II.
Phase III is commercialization: no statutory cap, no SBIR funds. Financed by private investment, federal procurement contracts, or non-SBIR government grants. At DoD, Phase III sole-source contracts can be issued to Phase II awardees without a new competition, which is one of the most powerful features of the DoD SBIR program.
How do I choose between NIH, NSF, DoD, and DOE for SBIR?
The short answer: match the agency's mission, not its ceiling
Choose the agency whose mission most directly aligns with your technology's end use, not the one with the highest ceiling: NIH for biomedical and health technology, NSF for deep technology in any domain without a clear agency mission home, DoD for defense or dual-use technology, DOE for energy and environmental technology, and NASA for space and aerospace systems.
Do not choose an agency based on Phase II cap size. Choose based on which program officers will believe your technology is directly relevant to their mission. A mismatch between your technology and the agency's mission is the most common rejection reason across all SBIR programs. The eleven agencies' published annual budgets in 2026 range from $2.3 billion at the Department of Defense to $5 million at the EPA, and their Phase I figures from $323,090 down to $100,000 — but a proposal scored against the wrong mission loses at every one of them.
What is the difference between SBIR and STTR?
The short answer: same money, but STTR mandates a research-institution partner
SBIR and STTR have identical funding amounts and the same eligibility rules for the company. The difference is STTR requires a formal research institution partner: at least 30% of the work must go to a university, federal lab, or nonprofit research organization, and at least 40% must stay with the small business.
STTR relaxes the PI employment rule: the PI can be primarily employed at the university. SBIR requires the PI to be primarily employed by the company. If your co-founder is a faculty member who cannot leave their university appointment, STTR is the right path. STTR also requires a formal IP Rights Agreement between the company and the research institution before submission -- allow 8 to 10 weeks for university technology transfer offices to process this.
How long does it take to get SBIR funding from application to check?
The short answer: 9 to 14 months per cycle, and 18 to 30 months to a first win
The realistic timeline from starting your application to receiving your first payment is 9 to 14 months. At NIH, applications are due September 5, January 5, or April 5; awards typically start 6 to 8 months later. At NSF, the Project Pitch adds 1 to 2 months before the full proposal; total cycle is about 8 months. At DoD, the proposal-to-award timeline is 6 to 9 months from close, plus 1 to 3 months of contract negotiations.
Plan for at least one failed attempt before success. Most SBIR awardees apply 2 to 3 times before winning their first award. The realistic "idea to money in the bank" timeline for a first-time applicant is 18 to 30 months from decision to apply. NIH's three fixed receipt dates — September 5, January 5 and April 5, next falling on Tuesday, September 8, 2026 — mean each missed cycle costs four months.
Can a VC-backed startup apply for SBIR?
The short answer: minority VC always; majority VC only in two specific shapes
It depends on the agency and your cap table. NSF is the most restrictive: any company with majority ownership by a venture capital operating company, hedge fund, or PE firm is ineligible. DoD and NIH are more permissive under a 2022 SBA policy change that allows majority VC-owned firms to apply to select agencies.
The ownership test is at the individual level: 51% of the company must be owned by US citizens or permanent residents as individuals, not just as entities. If your cap table has significant foreign institutional investor concentration or a single investor above 50%, confirm eligibility with a lawyer before investing time in an application. The NSF restriction is particularly relevant for VC-backed deep-tech companies that would otherwise be strong NSF candidates.
What registrations do I need before applying for SBIR?
The short answer: SAM.gov, the SBIR Company Registry, and an agency portal
Every SBIR applicant needs three registrations before any award can be made, and none of them depends on how long the company has existed. A company incorporated in 2026 completes exactly the same stack as one incorporated in 2006. First, SAM.gov: register to get a Unique Entity Identifier. Allow 2 to 4 weeks for new registrations, and renew annually (a lapsed registration delays awards). Second, the SBA SBIR Company Registry at sbir.gov: a separate profile capturing ownership, employee count, and prior award history. Allow 1 to 3 business days. Third, an agency-specific portal account: eRA Commons for NIH, Research.gov for NSF, DSIP at dodsbirsttr.mil for DoD, and Grants.gov for DOE.
Start all three registrations at least 4 weeks before your target deadline. A lapsed SAM registration is the single most common last-minute crisis. SAM.gov must be current (not just registered -- actively renewed) at the time of award. Check your expiration date today.
Can SBIR grants be stacked with the federal R&D tax credit?
The short answer: yes, because a grant and a tax credit are different mechanisms
Yes. SBIR grants and the federal Section 41 R&D tax credit stack cleanly because they operate in different parts of your business. SBIR is a grant or contract covering eligible project costs. The R&D credit is a tax incentive on qualifying research wages -- including wages paid from SBIR funds.
Qualified small businesses with less than $5 million in gross receipts can apply up to $500,000 per year of the R&D credit directly against employer payroll taxes. File Form 6765 with your federal return to claim it. DoD contract awards have a different treatment under "funded research" rules (IRC 41(d)(4)) -- confirm with a CPA who has worked with both SBIR and Section 41 before claiming both for a DoD contract award.
What are the most common SBIR rejection reasons?
The short answer: mission misfit first, commercialization second
The most common SBIR rejection reasons, in approximate order of frequency: (1) poor topic or institute alignment -- the technology does not clearly serve the agency's mission or the specific topic's stated need; (2) weak commercialization plan -- especially at NSF and NIH, where it is an explicit scored criterion; (3) insufficient proof of innovation -- the application does not demonstrate clearly why existing approaches fail; (4) PI employment issues -- the PI is not primarily employed by the company at the time of award; (5) missing or lapsed registrations discovered after the deadline; (6) budget errors or unreasonable cost estimates; and (7) failure to contact the program officer or topic author before submitting.
At NIH specifically, poor Significance scores are the most common first-round failure mode. At NSF, "the project is too applied" (meaning it is engineering or product development rather than unproven research) is the most common Project Pitch rejection. At DoD, proposal-topic misalignment is endemic. The fix for all three: contact the program officer before you write.
How this guide was researched, and every source it rests on
This page was rewritten and fact-checked on August 27–28, 2026 against primary federal sources rather than secondary summaries. Where a figure is disputed across agency websites, the SBA document governs and the page says so. Where something is genuinely unsettled — the tax treatment of Section 41 credits on Department of Defense SBIR contracts is the clearest case — the page says it is unsettled rather than picking a side.
Four factual corrections were made to the previous version of this page in the course of that check, and they are listed here rather than quietly absorbed: the SBIR data-rights protection period is not less than 20 years from award, not four; the ownership threshold is “more than 50%” measured fully diluted, not “at least 51%”; the SBIR performance-of-work requirement is two-thirds in Phase I and one-half in Phase II, not 51%; and Direct-to-Phase-II SBIR authority sits with NIH, the Department of Defense and the Department of Education, and not with NASA.
Primary federal sources
Primary sources read on August 27, 2026: the SBA Guide to Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) Program Eligibility, September 2024 edition (sbir.gov), for ownership, control, size and affiliation; the SBA SBIR and STTR Policy Directive, May 2023 (sbir.gov/about/policies), for the phase definitions, performance-of-work percentages, periods of performance, award guideline amounts, the 20-year data protection period and the commercialization benchmarks; sbir.gov/about for the April 2026 award ceilings; sbir.gov/participating-agencies for all eleven agency budgets and Phase I/II amounts; and the sbir.gov FAQ sections on Eligibility Requirements, Size Rule, Company Registry, Performance Benchmarks, VC Participation and Data Rights.
Secondary sources, and what could not be verified first-hand
Secondary sources, each read August 27, 2026 and used only where a primary document was not available: the Crowell & Moring LLP client alert “SBIR/STTR Programs Reauthorized After Six-Month Lapse” for the contents of S. 3971, including the Strategic Breakthrough award and the foreign-risk screening provisions; NIH's Standard Due Dates policy for the weekend-and-holiday rollover rule; and NSF's 26-510 and 26-511 solicitation announcements for the current Phase I ceiling and Project Pitch reopening date. Program counts and catalog figures come from the GrantCompass catalog of 736 US funding programs as of August 28, 2026.
Three things on this page could not be verified against a primary federal document and are flagged as such rather than stated as fact. The tax treatment of Section 41 credits on Department of Defense SBIR contracts is a professional disagreement, not settled law. Agency-level success rates quoted in the older sections of this guide come from agency communications and practitioner reporting rather than a single published federal dataset, and should be read as ranges. And the precise list of agencies currently exercising the §5107 majority-VC authority is maintained by the SBA and changes; this page therefore tells you to check that list rather than reproducing it.
Corrections, and who maintains this page
This guide is written and maintained by Khalid Hamadeh, founder of GrantCompass, which operates grantcompass.co in the United States and grantcompass.ca in Canada. It is a commercial site: GrantCompass sells a paid brief on individual programs and a subscription to its full database, and that is disclosed on every page that carries a price. Nothing on this page is legal, tax or financial advice, and the eligibility questions it covers — ownership, affiliation, and the tax treatment of federal awards — are exactly the ones where a lawyer or CPA earns their fee.
Corrections are welcome and acted on. Email hello@grantcompass.co with the claim and the source you believe is correct, and the page is updated with a new review date. About GrantCompass explains who maintains this catalog and how it is kept current.
Sources: SBA SBIR program data (sbir.gov), SBA FY2022 SBIR/STTR Annual Report, SBA Guide to SBIR/STTR Program Eligibility (September 2024), SBA SBIR/STTR Policy Directive (May 2023, award amounts current as published April 2026), S. 3971 Small Business Innovation and Economic Security Act of 2026 (Congress.gov), NIH PA-24-245 omnibus solicitation, NIH Standard Due Dates policy, NSF 26-510 and 26-511, sbir.gov participating-agencies listing. SBIR/STTR reauthorized April 13, 2026 through September 30, 2031 following a lapse from September 30, 2025. Phase I ceiling $323,090 and Phase II ceiling $2,153,927 per SBA, April 2026. Content updated August 28, 2026.