SBIR vs STTR: Key Differences for Founders (2026)

Short answer

SBIR and STTR are both federal non-dilutive R&D programs that award up to $323,090 (Phase I) and $2.15M (Phase II) to US small businesses. The defining difference is that STTR requires a formal written partnership with a US research institution that performs at least 30% of the work — and allows the principal investigator to be employed at that institution rather than at your company. SBIR has no research-partner requirement and demands that the PI work primarily at your small business.

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.

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.

SBIR vs STTR — side by side

	SBIR	STTR
Research institution partner required	No — all work may be performed in-house	Yes — formal written Research Institution Agreement (RIA) required before proposal submission
Minimum work at research institution	Not applicable	At least 30% of Phase I/II work (measured in dollars of direct costs)
Minimum work at small business	At least 2/3 (≈67%) of Phase I work; at least 50% of Phase II work	At least 40% of Phase I/II work directly by the small business
Principal Investigator (PI) employment	PI must be primarily employed at the small business (>50% of working time) at time of award and throughout performance	PI may be employed at either the small business or the research institution — key flexibility for academic founders
Phase I award size	Up to $323,090 (as of April 2026, without SBA waiver)	Up to $323,090 (same statutory ceiling; DoD STTR caps at $250K per component policy)
Phase II award size	Up to $2,153,927 (as of April 2026, without SBA waiver)	Up to $2,153,927 (same ceiling; DoD STTR caps at $1.5M per component policy)
Participating federal agencies	11 agencies: DoD, HHS, DOE, NASA, NSF, USDA, DOC, EPA, DOT, ED, DHS	5 agencies: DoD, HHS (NIH), DOE, NASA, NSF
IP rights	Small business retains IP rights subject to government use license	IP rights must be negotiated in writing between small business and research institution; both parties retain certain rights — the RIA must address ownership and licensing
Eligible research institutions	Not applicable	Accredited US universities and colleges, nonprofit US research organizations, and federally funded R&D centers (FFRDCs)
For-profit small business required	Yes — 500 or fewer employees (including all affiliates), majority US owned and controlled	Yes — same requirement: ≤500 employees, majority US owned and controlled
Phase structure	Phase I (proof of concept, 6–12 months) → Phase II (technology development, up to 24 months) → Phase III (commercialization, no SBIR/STTR funds)	Same three-phase structure as SBIR
Foreign national screening (2026)	Mandatory for all applicants — added by 2026 reauthorization	Mandatory for all applicants — added by 2026 reauthorization

Which one fits you?

Choose SBIR if

Your R&D team is employed full-time at your company and you do all work in-house
You don't have an existing university or lab relationship — or don't want to negotiate IP rights with an institution
You want access to all 11 participating agencies (STTR is limited to 5)
Your PI can commit more than 50% of their time to the small business — a hard requirement SBIR enforces strictly
Speed matters and you want to avoid the overhead of drafting and executing a Research Institution Agreement before proposal submission

Choose STTR if

Your technology originated in a university lab and you want to commercialize it with your academic co-founder still leading the research
Your PI is a faculty member or researcher who cannot leave their institution — STTR explicitly allows the PI to remain at the research institution
You need specialized equipment or expertise that only a university lab or federal R&D center can provide
You are a spin-out from a university and the institution needs to formally participate to share IP
You are targeting NIH, DOE, DoD, or NASA funding and your project is fundamentally collaborative in nature

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.

Can you apply to both SBIR and STTR simultaneously?

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.

Frequently asked questions

Can I apply to both SBIR and STTR at the same time?

Yes. You can submit proposals to both programs simultaneously, including at the same agency, as long as each proposal responds to a different solicitation topic. Submitting identical proposals to SBIR and STTR in the same solicitation is not permitted. Many companies apply to both programs in parallel — using SBIR for in-house R&D and STTR for university-collaborative work.

Can I switch from SBIR to STTR (or vice versa) at Phase II?

Generally no — Phase II must follow the same program as Phase I. An SBIR Phase I award leads to an SBIR Phase II, and an STTR Phase I award leads to an STTR Phase II, at the same agency and under the same program rules. However, nothing stops a company from winning an SBIR Phase II at one agency while simultaneously pursuing an STTR Phase I at a different agency on a different topic.

Do I need a university partner to apply for SBIR?

No. SBIR has no research institution requirement whatsoever. Your company performs the R&D directly. You may subcontract some work to a university under SBIR, but the institution cannot perform more than one-third of Phase I work (since the small business must perform at least two-thirds). The institution has no formal role and no IP claim. This is the key practical difference from STTR.

My PI is a professor and cannot leave the university — can we apply for SBIR?

Not with that PI in the SBIR principal investigator role. SBIR requires the PI to be primarily employed (>50% of working time) at the small business. A professor who remains on faculty does not meet this standard. STTR was designed precisely for this situation — under STTR, the PI may be employed at the research institution. If your founding team includes a faculty member who will lead the technical work from the university, STTR is almost certainly the right program.

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