Editorial commentary
STTR (Small Business Technology Transfer) is a U.S. federal award program, created by the Small Business Technology Transfer Act of 1992 (Public Law 102-564) as a pilot modeled on the earlier SBIR program, that funds early-stage small-business R&D on the condition that the small business formally partners with a U.S. nonprofit research institution — typically a university — performing a defined share of the work. Like SBIR, STTR awards are non-dilutive: the government takes no equity and no ownership of resulting intellectual property.
Last verified August 25, 2026 against SBA/sbir.gov program materials, 15 U.S.C. § 638, and Congressional Research Service reporting on the program’s 2026 reauthorization.
What Makes STTR Different From SBIR
STTR and SBIR share the same three-phase structure and the same non-dilutive funding model, but STTR was built specifically to remove a barrier SBIR imposes on university-originated technology. Two structural rules distinguish the programs:
- Mandatory research-institution partnership. An STTR award requires a formal cooperative research agreement between the small business and a single partnering U.S. nonprofit research institution. The small business must perform at least 40% of the R&D and the research institution at least 30%, leaving up to 30% for other subcontractors.
- Flexible PI employment. Under standard SBIR rules, the Principal Investigator’s primary employment must be with the small business. STTR removes that requirement: the PI may be employed by either the small business or the partnering research institution, which allows a full-time faculty member to lead an STTR project while remaining on the university payroll — something SBIR does not permit.
Everything else — award purpose, non-dilutive structure, and the phased funding model — works the same way it does under SBIR.
Which Agencies Run STTR
STTR is narrower than SBIR in reach: only five of the eleven federal agencies that run SBIR programs also run STTR — currently the Department of Defense, HHS/NIH, the Department of Energy, NASA, and NSF. Each participating agency must set aside a statutory minimum share of its extramural R&D budget for STTR awards, currently 0.45% (compared with SBIR’s larger 3.2% set-aside) — a schedule that has increased incrementally by statute over the programs’ history.
Phase Structure and Award Caps
STTR uses the same three phases as SBIR: Phase I (feasibility, typically six to twelve months), Phase II (full R&D and prototype development, typically up to two years), and Phase III (commercialization, funded from non-STTR sources such as private investment, a follow-on federal contract, or licensing revenue). As of 2026 the statutory guideline caps — shared with SBIR — are $323,090 for Phase I and $2,153,927 for Phase II, with individual agencies able to exceed these only with SBA waiver approval.
2025–2026 Reauthorization
SBIR and STTR’s statutory authority lapsed on September 30, 2025 when Congress did not act before the prior extension (Public Law 117-183, the SBIR and STTR Extension Act of 2022) expired, pausing new STTR solicitations across all five participating agencies. Congress restored and extended both programs with the Small Business Innovation and Economic Security Act (S. 3971) — approved by the Senate March 3, 2026 and the House March 17, 2026 — extending authority through September 30, 2031 and adding a new higher-value “Strategic Breakthrough” Phase II award category at agencies with large SBIR/STTR budgets. See CASRAI’s SBIR/STTR Reauthorization guide for the full 2026 timeline.
Why This Matters for Research Administration
For a technology transfer office, STTR is frequently the more relevant of the two sibling programs for faculty-originated technology precisely because it does not force a choice between the PI keeping their university appointment and leading the award. A TTO supporting a faculty-founded spinout should still expect the same groundwork an SBIR proposal needs — an invention disclosure, an exclusive license or option agreement covering the underlying patent, and a conflict-of-interest review of the inventor’s dual role — but should confirm early which of the two programs the target agency runs, since only five of the eleven SBIR agencies also offer STTR.
Frequently Asked Questions
What does STTR stand for?
Small Business Technology Transfer — a U.S. federal award program created by the Small Business Technology Transfer Act of 1992.
How is STTR different from SBIR?
STTR requires a formal partnership with a nonprofit research institution (at least 40% of the work by the small business, at least 30% by the research institution) and allows the PI to be employed by either party. SBIR has no mandatory research-institution partnership and requires the PI’s primary employment to be with the small business.
Which federal agencies offer STTR awards?
Five of the eleven SBIR agencies also run STTR: the Department of Defense, HHS/NIH, the Department of Energy, NASA, and NSF.
Is STTR currently active?
Yes. After a lapse in statutory authority from September 30, 2025 to April 13, 2026, Congress reauthorized SBIR and STTR through September 30, 2031 via the Small Business Innovation and Economic Security Act.
References
- SBA/sbir.gov, program basics, eligibility, and policy directive materials — sbir.gov
- 15 U.S.C. § 638 (Small Business Innovation Research and Small Business Technology Transfer programs), as amended by the Small Business Innovation and Economic Security Act, S. 3971 (2026)
- Small Business Technology Transfer Act of 1992, Public Law 102-564
- Congressional Research Service, “Small Business Research Programs: SBIR and STTR” (congress.gov)
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