SBIR vs STTR: Which Federal R&D Grant Fits Your Startup?

SBIR/STTR program status: July 2026

The single most common question about these programs right now isn't about eligibility or awards — it's whether they still exist. Here's the direct, dated answer to each version of that question, sourced to the actual legislation and the agencies' own solicitation pages.

Is SBIR funded for 2026?

Yes — SBIR is funded for 2026 and for five more years after that. President Trump signed the Small Business Innovation and Economic Security Act (S. 3971) into law on April 13, 2026, reauthorizing both SBIR and STTR through September 30, 2031 (GovInfo.gov, Public Law 119-83). The bill cleared the Senate on March 3, 2026 and the House by a 345–41 vote on March 17, 2026, before the President's signature. That five-year window covers all of federal fiscal year 2026 and runs through FY2031, so the funding question has a definitive yes: statutory authority exists, SBA-administered appropriations continue, and all 11 SBIR agencies have released or announced FY2026 solicitations with award ceilings unchanged at $323,090 (Phase I) and $2,153,927 (Phase II) (SBIR.gov).

Are SBIR grants being discontinued?

No — SBIR grants are not being discontinued. The programs went through a real six-month lapse in statutory authority (October 1, 2025 through April 13, 2026) during which agencies could not issue new SBIR or STTR awards, but a lapse is not a discontinuation. SBIR has operated continuously since 1982 and has been reauthorized roughly a dozen times, most recently for five additional years under the Small Business Innovation and Economic Security Act, signed April 13, 2026. The 2026 reauthorization expanded the program rather than shrinking it — it added a new "Strategic Breakthrough Award" tier of up to $30 million for agencies with extramural research budgets over $100 million, alongside stricter national-security screening for every applicant. If you saw headlines calling SBIR "at risk" or "in limbo," those referred to the 2025 lapse, which ended in April 2026 — not a current or planned shutdown.

Is the SBIR program ending?

No — SBIR is not ending. The April 2026 reauthorization extended both SBIR and STTR through September 30, 2031, one of the program's longest authorization windows in over a decade. SBIR has run continuously since Congress created it in 1982 to fund small-business R&D that larger federal research budgets overlooked; STTR followed in 1992. Every prior authorization gap — including 2025's — has ended in renewal, not termination, because SBIR/STTR together account for roughly $4 billion a year in federal extramural research spending that 11 agencies (DoD, HHS, NASA, NSF, and others) rely on to source early-stage technology. The 2026 law also raised the program's ambition rather than winding it down: it created the Strategic Breakthrough Award (up to $30 million per company at large-budget agencies) and set new FY2027 proposal caps to manage volume — investments a program on its way out would not make.

Is SBIR still paused?

No — SBIR is not paused as of July 6, 2026. The roughly six-month pause ended when the Small Business Innovation and Economic Security Act was signed April 13, 2026. Since then, agencies have restarted solicitations on a rolling basis: DoD's FY26 SBIR/STTR Release 3 opened June 24, 2026 with roughly 37 topics across DARPA, the Navy, the Air Force, and other components (deadline July 22, 2026, per DoD's DSIP portal); NSF reopened its Project Pitch on-ramp June 2, 2026 with a first full-proposal deadline of July 27, 2026 (seedfund.nsf.gov); and NIH posted four new SBIR/STTR Parent NOFOs in May 2026 with a first due date of September 8, 2026 (seed.nih.gov). Some calendars remain compressed from the lapse backlog, but "paused" no longer describes the program.

Did SBIR/STTR expire on September 30, 2025?

Yes — the prior SBIR/STTR statutory authorization expired at the end of September 30, 2025, when Congress had not passed a reauthorization bill before the deadline. Beginning October 1, 2025, the SBA and the 11 participating agencies lost the legal authority to issue new SBIR or STTR awards or solicitations; awards already under contract continued, but no new selections could be made. The lapse lasted approximately six and a half months. It ended April 13, 2026, when President Trump signed the Small Business Innovation and Economic Security Act (S. 3971, Public Law 119-83), reauthorizing both programs through September 30, 2031 (GovInfo.gov). So the September 30, 2025 expiration date is accurate — but as of July 2026 it is history: the programs have been reauthorized for five more years, and agencies have resumed issuing new solicitations.

Are SBIR grants still available?

Yes — SBIR grants are actively available as of July 2026, with new solicitations open right now across multiple agencies. NSF's FY2026 SBIR/STTR solicitation accepts full proposals through July 27, 2026, with later cycles on November 4, 2026 and March 4, 2027 (seedfund.nsf.gov); DoD's FY26 Release 3 (DARPA, Navy, Air Force, and other components) closes July 22, 2026; and NIH's new solicitations run on a first deadline of September 8, 2026, with additional standard due dates in January and April. Availability and timing vary by agency and topic — check each agency's own SBIR portal, linked from SBIR.gov's topics page, since the post-reauthorization restart schedule differs by component.

SBIR and STTR are federal, non-dilutive R&D programs backed by $4 billion a year

What does SBIR stand for?

SBIR stands for Small Business Innovation Research. STTR stands for Small Business Technology Transfer. Both are federal programs, sometimes called "America's Seed Fund," that award non-dilutive contracts and grants — money a company does not repay and does not give up equity for — to small businesses doing R&D with commercial potential. SBIR was created by the Small Business Innovation Development Act of 1982; STTR followed in 1992, specifically to fund research born out of university and federal-lab partnerships. The Small Business Administration (SBA) sets government-wide policy for both programs (SBIR.gov), while 11 federal agencies run SBIR and 5 of those also run STTR under that shared policy. Both names are used for the program itself and, informally, for the award — as in "she won an SBIR."

Both SBIR (Small Business Innovation Research) and STTR (Small Business Technology Transfer) are America's Seed Fund programs, administered by the SBA and 11 federal agencies. Together they deploy roughly $4 billion per year in non-dilutive contracts and grants to early-stage US technology companies. For the full application process and agency-specific tips, see our guide to SBIR grants for startups; if R&D funding is just one piece of your strategy, browse the wider set of technology business grants.

Choosing between them comes down to one question: do you have — or want — a formal research institution partner? STTR was created specifically to bridge the gap between academic discovery and commercial application. SBIR was designed for companies doing R&D entirely in-house. Understanding which fits your situation before you apply can save months of misdirected effort. Both programs are exclusively federal — if you're also weighing state-run alternatives, see our federal vs. state small business grants comparison.

SBIR vs STTR — side by side

What's the difference between SBIR and STTR, in one sentence?

The core difference is the research partner: STTR requires a formal, signed partnership with a US research institution that performs at least 30% of the funded work (and lets the principal investigator be a university employee), while SBIR has no research-institution requirement at all and requires the small business's own staff to do virtually all the work, with the PI primarily employed by the company. Everything else is nearly identical — both use the same $323,090 Phase I / $2,153,927 Phase II award ceilings, the same three-phase structure, and the same ≤500-employee, majority-US-owned eligibility rules. The practical test: if your technology and technical lead live entirely at your company, apply to SBIR; if either lives partly at a university or federal lab, apply to STTR. The full rule-by-rule comparison is below.

SBIR runs through 11 federal agencies; STTR is limited to 5

SBIR is the broader program by agency reach: all 11 participating agencies — DoD, HHS, DOE, NASA, NSF, USDA, DOC, EPA, DOT, ED, and DHS — run SBIR solicitations. STTR is limited to the 5 agencies with the largest extramural research budgets: DoD, HHS (through NIH), DOE, NASA, and NSF. USDA, DOC, EPA, DOT, and ED offer SBIR funding with no STTR equivalent, so a founder targeting agriculture, commerce, environmental, transportation, or education research has only one option: SBIR. See the complete federal landscape in our ranking of the top federal small business grants.

participates in both SBIR & STTR  ·  SBIR only

Phase I and Phase II share the same statutory award ceilings

SBIR and STTR use identical federal ceilings: Phase I tops out at $323,090 and Phase II at $2,153,927, current as of the April 2026 reauthorization. Some agencies apply internal caps below the statutory maximum — DoD's STTR program, for example, typically limits Phase I to $250,000 and Phase II to $1.5 million — but the SBA-set ceiling is the same for both programs. An SBIR or STTR Phase II is the single largest one-time non-dilutive award most early-stage companies can realistically win; see how it compares in our ranking of the biggest small business grants you can win.

How hard is it to win an SBIR? Our catalog data says: hard, and it varies a lot by agency

Across the 13 SBIR Phase I programs in GrantCompass's catalog, the average application difficulty is 4.1 out of 5, the average competitiveness score is 4.1 out of 5, and the average proposal takes about 102 hours to prepare — roughly two and a half work-weeks — before you even submit. No .gov page publishes this comparison: SBIR.gov describes eligibility and process, not how hard one agency's topic is to win relative to another's. The honest answer is "hard, and it depends heavily on the agency": DARPA's SBIR is the single toughest program in the federal government (5/5 difficulty, ~130 hours, 5–10% acceptance), while EPA's and the Air Force's programs are comparatively more winnable (15–25% acceptance) for a similar or lower time investment. Government-wide, SBIR Phase I success rates run roughly 10–25% of submitted proposals depending on agency and year — meaning most well-written proposals are still rejected on competitiveness, not quality alone. The video below charts every agency's acceptance rate and difficulty score at a glance.

Difficulty and competitiveness scored 1–5 (5 = hardest); NIH and NSF publish acceptance data but our catalog does not yet assign them a separate 1–5 difficulty score, shown as —. Hours are the estimated time to prepare a complete, competitive Phase I proposal (research, technical writing, budget, compliance) — not agency review time. Source: GrantCompass's enriched catalog of individual agency SBIR Phase I programs, each linked above with its full application archetype, insider tips, and common rejection reasons.

What are the deadlines for SBIR grants?

There is no single SBIR deadline — each of the 11 participating agencies runs its own solicitation calendar, typically with two or three cycles per year. As of July 2026: NSF's FY2026 SBIR/STTR full-proposal deadline is July 27, 2026, with later cycles November 4, 2026 and March 4, 2027 (seedfund.nsf.gov); DoD's FY26 Release 3 (DARPA, Navy, Air Force, and other components) closes July 22, 2026; and NIH's new SBIR/STTR Parent NOFOs share a first due date of September 8, 2026, with additional standard due dates in January and April (seed.nih.gov). Because deadlines shift year to year and agency to agency — and because the 2025–2026 reauthorization lapse pushed several agencies' calendars later than usual — the only reliable source is each agency's own SBIR portal, linked from SBIR.gov's topics page. Bookmark your target agency's page rather than a fixed date.

STTR requires a research-institution partner; SBIR does not

The fastest way to decide is to answer two yes/no questions about your research relationship and your principal investigator's employment. Work through the flow below, then check the detailed criteria in the cards underneath.

Worked example: an academic founder choosing between SBIR and STTR

Dr. Elena Cho, a materials-science professor, developed a novel battery coating in her university lab and wants to commercialize it through her startup, MatCoat Inc. She plans to remain on faculty for at least two more years while her co-founder runs day-to-day operations. Because Dr. Cho — the project's technical lead — cannot leave her professorship to work primarily at MatCoat (SBIR's >50%-employment rule for the PI), the company cannot name her SBIR Principal Investigator. Under STTR, however, Dr. Cho can remain PI while employed at the university, as long as the institution performs at least 30% of the funded work and MatCoat performs at least 40%, under a signed Research Institution Agreement. MatCoat applies to the DOE STTR program for the full $323,090 Phase I ceiling: the university lab receives roughly $97,000 (30%) for materials testing, and MatCoat's two in-house engineers use the remaining $226,000 for prototype fabrication and commercial planning. This is exactly the situation STTR was designed for.

The most common SBIR/STTR mistakes are avoidable

Most SBIR/STTR rejections and delays trace back to a handful of avoidable errors, not weak science. Check your plan against these five before you submit:

• Assuming you can switch programs at Phase II. Phase II generally must follow the same program as Phase I — an SBIR Phase I leads to an SBIR Phase II, not an STTR Phase II, at the same agency.
• Negotiating the Research Institution Agreement (RIA) after winning. STTR requires the RIA to be executed before proposal submission, not after a funding decision — waiting causes missed deadlines and disqualified proposals.
• Naming a full-time professor as the SBIR Principal Investigator. SBIR requires the PI to be primarily employed (>50% of working time) at the small business; a faculty member who stays on campus only qualifies as PI under STTR.
• Treating the university partner as an informal subcontractor under STTR. STTR requires a minimum 30% institution work share and written IP terms in the RIA — an informal handshake arrangement does not satisfy the requirement.
• Overlooking the 2026 foreign national screening requirement. As of the April 2026 reauthorization, mandatory foreign ownership, control, or influence (FOCI) screening applies to every applicant at all 11 SBIR and 5 STTR agencies.

What changed in 2026

SBIR and STTR authorization lapsed on October 1, 2025 when the prior reauthorization expired. During the lapse, federal agencies could not issue new SBIR or STTR awards, causing delays across all 11 participating agencies.

Congress reauthorized both programs on April 13, 2026, extending authority through September 30, 2031. Dollar amounts were not changed — the Phase I ceiling remains $323,090 and the Phase II ceiling remains $2,153,927, as confirmed by SBA (sbir.gov, April 2026).

The 2026 reauthorization added one new procedural requirement: mandatory foreign national screening (FOCI — Foreign Ownership, Control, or Influence disclosure) for all applicants at all agencies. DoD had already been applying heightened screening; the reauthorization codified it program-wide. Applicants with foreign nationals in key positions or significant foreign ownership should review the updated SBA guidance before applying.

Following reauthorization, agencies began issuing delayed solicitations and awards. Check each agency's portal for the reopening schedule — some backlog remains as of mid-2026.

Phase III: Commercialization (both programs)

Phase III is the commercialization stage of both SBIR and STTR. Unlike Phases I and II, Phase III does not use SBIR or STTR funds — companies are expected to attract private investment, non-SBIR federal contracts, or strategic partners to bring their technology to market.

Under both programs, federal agencies have 'sole source' authority to award follow-on Phase III contracts to SBIR/STTR awardees without a competitive process. This is one of the most underused benefits of completing Phase II — agencies can continue to fund commercialization of the technology they funded in Phases I and II, bypassing normal procurement competition.

For STTR Phase III, IP rights negotiated in the original Research Institution Agreement (RIA) carry forward. Founders should ensure the RIA grants the small business sufficient licensing rights to commercialize the technology at Phase III without returning to the institution for approvals.

You can apply to SBIR and STTR at the same time — just not with an identical proposal

Yes — applying to both programs is permitted and common. There is no rule against submitting a SBIR proposal and a separate STTR proposal on the same or related technology at the same time, provided each meets its respective program requirements.

What you cannot do is submit the same proposal to both programs at the same agency in the same solicitation. Each proposal must stand independently and address a specific solicitation topic.

Some founders start with SBIR to retain full IP control and move to STTR when they identify a university collaborator who brings critical capabilities. Others work in parallel — using SBIR funding for the commercial development track while using STTR funding for more fundamental research with the institution partner.