3 U.S. Federal SBIR/STTR Funding Opportunities 2026: NIH, NSF and Defense Grants for Small Businesses
Three major federal funding windows are available in 2026 for U.S. startups and small businesses developing technologies in health, deep tech, and national security. The opportunities come from the National Institutes of Health, the National Science Foundation, and the U.S. Department of Defense.
Overview
Three major federal funding windows are available in 2026 for U.S. startups and small businesses developing technologies in health, deep tech, national security, and other research-intensive sectors. These opportunities come from the National Institutes of Health (NIH), the U.S. National Science Foundation (NSF), and the U.S. Department of Defense Small Business Innovation Research and Small Business Technology Transfer ecosystem, including components administered through the Defense Logistics Agency. These programmes provide non-dilutive federal research and development funding to help small companies establish technical feasibility, develop prototypes, and advance research toward commercialization.
Eligibility
Eligibility requirements vary by agency, but general parameters include:
- Must qualify as a U.S. small business concern, generally with no more than 500 employees including affiliates.
- For STTR proposals, the business must include a formal collaboration with a nonprofit research institution.
- Principal Investigators must be primarily employed by the small business and hold the legal right to work in the United States.
Benefits
The programmes offer tiered funding structures depending on the agency and phase:
- NIH STTR: Supports biomedical and life-sciences research and development in partnership with nonprofit research institutions through Phase I, Phase II, Direct to Phase II, and Fast-Track options.
- NSF Phase I & II: Phase I supports early-stage research up to $305,000 for 6 to 18 months; Phase II supports successful awardees up to $1,250,000 for approximately 24 months. Fast-Track provides up to $1,555,000.
- Department of Defense: Topic-based funding across multiple monthly release cycles for technologies addressing national security and defense needs.
How to Apply
Applicants should review specific agency guidelines, confirm eligibility, and complete any mandatory preliminary steps before submitting full proposals. For instance, NSF requires new Phase I and Fast-Track applicants to submit an official Project Pitch and receive an invitation before applying.
Deadline
The upcoming deadlines vary across the three funding agencies:
- NIH STTR: September 2026 cycle deadline is adjusted to 8 September 2026, with additional standard due dates on 5 January 2027 and 5 April 2027.
- Defense SBIR/STTR Release 5: Closes on 23 September 2026.
- NSF SBIR/STTR: Full-proposal deadline is 4 November 2026 at 5:00 p.m. local time.