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, national security and other research-intensive sectors.

The 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/Small Business Technology Transfer ecosystem, including opportunities administered through components such as the Defense Logistics Agency.

Together, these programmes provide non-dilutive federal research and development funding that can help small companies establish technical feasibility, develop prototypes, advance research toward commercialization and build partnerships with universities or nonprofit research institutions.

Founders should pay particular attention to the upcoming 2026 deadlines because each programme operates under different submission rules, eligibility requirements and funding phases.

1. NIH Small Business Technology Transfer Grant: Parent STTR R41/R42

The NIH Small Business Technology Transfer Grant, Parent STTR [R41/R42], Clinical Trial Optional, is designed to support U.S. small businesses conducting biomedical or life-sciences research and development in partnership with nonprofit research institutions.

The funding opportunity is listed as PA-27-102 and is part of the federal STTR programme, also commonly associated with America’s Seed Fund.

About the NIH STTR Programme

NIH uses the SBIR and STTR programmes to help U.S.-owned and operated small businesses develop technologies and products that support its mission to improve health, extend life and reduce illness and disability.

STTR differs from SBIR because projects funded through STTR must include a formal collaboration with a nonprofit research institution, such as a university.

The Principal Investigator may be employed by either the small business or the collaborating nonprofit research institution. However, the funding award itself is made to the eligible small business.

Businesses whose projects do not require this type of institutional collaboration may instead consider the NIH SBIR funding route.

What the NIH STTR Funding Supports

The programme supports research and development required to move an innovative idea toward a commercially viable product.

Eligible applications may fall under several funding stages:

• Phase I: Establishes technical merit and feasibility.
• Phase II: Continues research and development toward commercialization.
• Direct to Phase II: Available through NIH for businesses that have already demonstrated feasibility without previously receiving a Phase I award for the project.
• Fast-Track: Allows Phase I and Phase II to be submitted and reviewed together.

After Phase II, NIH generally expects companies to continue commercialization using non-SBIR/STTR funding.

Research Scope

Proposals should contribute to the missions of participating NIH, CDC or FDA components.

Relevant projects may span biomedical technologies, health technologies, diagnostics, life sciences, medical research and other areas aligned with participating institutes and centres.

Applicants are encouraged to contact the appropriate NIH Institute, Center or Office before submission to determine whether their project is a suitable fit.

Clinical trials may be included under the Parent STTR opportunity, but some participating NIH Institutes and Centers do not accept clinical-trial applications through this specific funding announcement.

Applicants proposing clinical research should therefore carefully review component-specific rules.

NIH Application Timeline

The funding opportunity was released on 28 May 2026 and opened on 5 August 2026.

The solicitation lists standard due dates of:

• 5 September 2026
• 5 January 2027
• 5 April 2027

The provided funding summary notes that the September 2026 submission deadline is effectively 8 September 2026, because 5 September falls on a Saturday and the following Monday is Labor Day.

Applicants should verify the operative deadline through the official agency solicitation before submission.

APPLY HERE

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2. NSF SBIR/STTR Phase I, Phase II and Fast-Track Programmes

The second opportunity is the NSF 26-510 Small Business Innovation Research / Small Business Technology Transfer Phase I, Phase II and Fast-Track Programs, administered through the U.S. National Science Foundation’s Directorate for Technology, Innovation and Partnerships.

The programme supports startups and small businesses developing high-risk technologies with strong potential for commercial impact.

What NSF SBIR/STTR Supports

NSF describes the programme as a mechanism for transforming scientific discoveries and technological breakthroughs into products and services.

Funding can support technologies across a broad range of areas, potentially including:

• Artificial intelligence
• Robotics
• Semiconductors
• Biotechnology
• Medical devices
• Advanced manufacturing
• Quantum technologies
• Clean energy
• Data technologies
• Computing
• Other emerging and deep-technology sectors

NSF does not generally procure specific products through this programme. Instead, it invests in the research and development needed to turn promising technologies into commercially viable innovations.

NSF takes no equity in funded businesses, and awardees retain ownership of their companies and intellectual property.

NSF Phase I Funding

Phase I supports technical research and development at an early stage.

Businesses may request up to:

$305,000

Projects generally run for approximately 6 to 18 months.

Phase I is designed to reduce technical risk and establish whether a technology has sufficient merit and feasibility to justify continued development.

NSF Phase II Funding

Phase II supports companies that have successfully completed an eligible NSF Phase I award.

Funding may reach:

$1,250,000

Phase II projects typically run for approximately 24 months and focus on advancing technical development and commercialization.

Only eligible NSF Phase I awardees may submit Phase II proposals.

NSF Fast-Track Funding

The Fast-Track programme combines Phase I and Phase II development.

Funding may reach approximately:

$1,555,000

The Phase I portion may include up to $400,000, followed by up to approximately $1.155 million for the Phase II component.

Additional NSF Funding Pathways

Existing Phase II awardees may also have access to:

• Phase IIB supplements
• Technology Enhancement for Commercial Partnerships supplements
• Strategic Breakthrough opportunities

Strategic Breakthrough proposals may, following invitation or consultation with the relevant NSF Programme Officer, request substantially larger amounts for exceptional technologies approaching commercial readiness.

Project Pitch Requirement

A major requirement applies to new Phase I and Fast-Track applicants.

Before submitting a full proposal, companies must submit an official Project Pitch and receive an invitation from NSF.

For Phase I, the invitation generally remains valid for the next two eligible submission deadlines.

For Fast-Track, the full proposal must be submitted within four months of receiving the invitation.

NSF limits the number of Project Pitches that a company can submit.

NSF Eligibility

Applicants must qualify as U.S. small business concerns.

The programme generally applies to firms with no more than 500 employees, including affiliates.

For STTR proposals, the business must also partner with a research institution.

The Principal Investigator must be primarily employed by the small business, generally meaning at least 51% employment with the company.

The PI must also have the legal right to work for the company in the United States. NSF does not impose a specific degree requirement on the PI.

NSF Review Criteria

Proposals are evaluated according to three major criteria:

• Intellectual Merit
• Broader Impacts
• Commercial Potential

Strong proposals should therefore demonstrate not only interesting science or engineering, but also a realistic pathway from research to meaningful commercial use.

NSF Deadline

The next major full-proposal deadline is:

4 November 2026 at 5:00 p.m. in the submitting organisation’s local time

Additional scheduled deadlines include March and July 2027.

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3. Department of Defense SBIR/STTR 2026 Release Cycle

The third opportunity comes through the U.S. Department of Defense SBIR/STTR system.

Participating defense components may release research topics addressing technological needs across areas such as:

• National security
• Autonomy
• Space technologies
• Cybersecurity
• Advanced materials
• Supply-chain technologies
• Logistics
• Manufacturing
• Defense systems
• Other mission-related technologies

The Defense Logistics Agency is one participating organisation within the broader defense innovation ecosystem.

About Defense SBIR/STTR Programmes

The SBIR programme supports research and development conducted by qualifying small businesses, while STTR supports cooperative R&D involving small companies and nonprofit U.S. research institutions.

The programmes generally follow three phases:

• Phase I: Demonstrate technical feasibility.
• Phase II: Develop prototypes, processes or products for proof-of-concept.
• Phase III: Commercial application of the technology using funding outside the SBIR/STTR set-aside.

The broader objective is to stimulate innovation, advance commercialization and develop technologies relevant to defense needs.

2026 Release Schedule

The provided 2026 schedule includes multiple monthly-style release cycles.

For Release 5:

• Pre-release: 5 August 2026
• Opens: 26 August 2026
• Closes: 23 September 2026
• Evaluation period through: 22 December 2026
• Expected awards: 22 March 2027

For Release 6:

• Pre-release: 2 September 2026
• Opens: 23 September 2026
• Closes: 21 October 2026

Dates are subject to change.

Companies should monitor the Defense SBIR/STTR Innovation Portal for individual topics because technical requirements, participating components and eligibility details can vary by solicitation.

Training and Compliance

Companies participating in certain Defense Logistics Agency innovation programmes should also be aware of compliance and training requirements.

These may include:

• Cybersecurity Maturity Model Certification training
• Controlled Unclassified Information training
• Enhanced Joint Certification Program requirements
• Foreign Ownership, Control and Influence training

Applicants should review the requirements attached to the specific topic before preparing a proposal.

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Key Deadlines to Remember

For founders considering these three opportunities, the immediate dates are:

• NIH STTR: September 2026 cycle; the provided summary identifies 8 September 2026 as the adjusted deadline
• Defense SBIR/STTR Release 5: 23 September 2026
• NSF SBIR/STTR: 4 November 2026 at 5:00 p.m. local time

Because some programmes require preliminary steps, founders should not treat the full-proposal deadline as the date to begin preparing.

NSF Phase I and Fast-Track applicants, for example, must obtain a Project Pitch invitation before submitting the complete proposal.

Conclusion

The NIH, NSF and Department of Defense SBIR/STTR programmes provide three substantial pathways for U.S. small businesses seeking non-dilutive research and development funding in 2026.

NIH may be particularly relevant to biomedical and health-focused companies collaborating with research institutions. NSF offers broad support for high-risk deep technologies with commercial potential, including funding of up to $305,000 for Phase I and $1.25 million for Phase II. Defense SBIR/STTR opportunities provide recurring topic-based windows for companies developing technologies relevant to national security and defense needs.

Founders should identify the programme that best matches their technology, confirm their eligibility and begin preparing well before the deadline. Federal innovation funding can be generous, but it rewards preparation; bureaucracy rarely becomes more charming when met at 4:57 p.m.