SBIR Funding Guide

What Is the SBIR Program?

The Small Business Innovation Research (SBIR) program is a federal initiative that funds research and development at small businesses. Created by the Small Business Innovation Development Act of 1982, SBIR requires eleven federal agencies with extramural R&D budgets exceeding $100 million to set aside 3.2% of those budgets for small business awards.

The program serves a dual purpose: it gives small businesses access to federal R&D funding, and it gives federal agencies access to commercial innovation. Unlike grants, SBIR awards fund specific research topics defined by the agencies — you are solving a problem the government has identified, using your technology and expertise.

SBIR funding is non-dilutive. You do not give up equity, board seats, or control of your company. The government funds your R&D in exchange for a license to use the resulting technology for government purposes. You retain the intellectual property and can commercialize it in both government and commercial markets.

The closely related Small Business Technology Transfer (STTR) program operates similarly but requires a formal partnership with a nonprofit research institution (university, federal lab, or FFRDC). STTR is mandatory for five agencies and allocates 0.45% of extramural R&D budgets. STTR is ideal for startups with strong academic collaborations.

SBIR Eligibility Requirements

SBIR eligibility requirements are straightforward, but they are strictly enforced. All of the following must be true at the time of award:

Organized for profit: Your company must be a for-profit business organized in the United States. Nonprofits, foreign companies, and sole proprietorships that are not incorporated are ineligible.

More than 50% U.S.-owned: The company must be more than 50% directly owned and controlled by one or more individuals who are citizens or permanent resident aliens of the United States. Companies majority-owned by other businesses, venture capital firms, or hedge funds have additional restrictions — check the specific agency's rules.

Fewer than 500 employees: Your company must have no more than 500 employees, including all affiliates. This is a size standard, not headcount on payroll — the SBA's affiliation rules can aggregate employees across related entities.

Principal Investigator employment: The Principal Investigator (PI) must be primarily employed by the small business at the time of award and during the performance period. For STTR, the PI can be employed by the research institution partner.

Key differences between SBIR and STTR: SBIR requires the small business to perform at least 2/3 of Phase I work and 1/2 of Phase II work. STTR requires at least 40% by the small business and 30% by the research institution, with the remaining 30% flexible. STTR also requires a formal Cooperative R&D Agreement between partners.

The Three Phases of SBIR

SBIR awards follow a structured three-phase process. Each phase has distinct objectives, funding levels, and timelines.

Phase I — Proof of Concept: Phase I awards fund the exploration of technical feasibility. Typical awards range from $50,000 to $275,000 depending on the agency, with performance periods of 6 to 12 months. The goal is to demonstrate that your approach is technically sound and worth further investment. Phase I proposals are typically 15 to 25 pages.

Phase II — Prototype Development: Phase II awards fund full research and development based on Phase I results. Awards range from $500,000 to $1.8 million with performance periods of 24 months. This phase produces working prototypes, detailed technical data, and a commercialization plan. Only companies that successfully completed Phase I are eligible for Phase II (with some exceptions for Direct-to-Phase II programs).

Phase III — Commercialization: Phase III is not a separate SBIR award — it is the commercialization and production phase where your SBIR-developed technology transitions to actual use. Phase III contracts are funded from the agency's operational budget (not the SBIR set-aside), have no dollar cap, and are not small business set-asides. Phase III is where the real revenue begins.

The Phase III distinction is critical: a company that develops technology under SBIR Phase I and II has the right to compete for Phase III production contracts. These can be sole-sourced in many situations, giving SBIR awardees a significant competitive advantage for follow-on work.

Some agencies also offer Phase I Enhancement (Phase IB) awards that bridge the gap between Phase I and Phase II, and Sequential Phase II awards that extend the development period.

Participating Federal Agencies

Eleven federal agencies participate in SBIR, and each has its own priorities, award amounts, timelines, and review processes. Understanding the differences is critical to targeting the right agency for your technology.

Department of Defense (DoD): The largest SBIR funder, awarding over $1.8 billion annually across the Army, Navy, Air Force, DARPA, MDA, SOCOM, DTRA, CBD, and other components. DoD SBIR topics are highly specific and tied to capability gaps. The DoD releases topics three times per year.

National Institutes of Health (NIH): The second-largest funder, focusing on biomedical and public health innovation. NIH SBIR uses an omnibus solicitation with standing receipt dates — you can submit on your own topic if it aligns with an institute's mission. Awards tend to be larger than DoD Phase I awards.

Department of Energy (DOE): Focuses on energy, nuclear security, and environmental management. DOE releases topics annually and evaluates proposals through expert panels.

NASA: Funds aerospace, space technology, and earth science innovation. NASA SBIR is highly competitive and focuses on technologies that support its mission directorates.

National Science Foundation (NSF): Unique in that NSF SBIR is not topic-driven — you propose your own innovation if it has technical risk, commercial potential, and societal impact. NSF also runs the America's Seed Fund program, which includes I-Corps training.

Other participating agencies include the Department of Homeland Security (DHS), Department of Transportation (DOT), Department of Agriculture (USDA), Department of Education (ED), Environmental Protection Agency (EPA), and Department of Commerce (DOC/NIST).

2026 SBIR Updates: Strategic Breakthrough Awards

The most significant change to the SBIR program in decades arrived in 2026 with the introduction of Strategic Breakthrough Awards. Congress authorized these awards at up to $30 million each, targeting critical technology areas where rapid commercialization is in the national interest.

Strategic Breakthrough Awards bypass the traditional Phase I/II structure. They are designed for companies that have already demonstrated significant technical progress and need accelerated funding to reach production. Priority areas include artificial intelligence and machine learning, quantum computing, hypersonics, biotechnology, advanced materials, and energy storage.

Additional 2026 changes include expanded Direct-to-Phase II authority, which allows companies with proven feasibility (from prior R&D, commercial prototypes, or previous Phase I awards) to skip Phase I entirely. Several agencies have also increased Phase I and Phase II award ceilings.

The SBIR reauthorization also strengthened data rights protections for small businesses, extended the SBIR protection period for technical data, and increased reporting requirements around foreign ownership and influence.

These changes signal a fundamental shift in how the government views SBIR — from a small business subsidy to a strategic technology pipeline. For startups with technology in priority areas, the funding available through SBIR has never been larger.

Writing a Winning SBIR Proposal

SBIR proposals are evaluated on four primary criteria (with variations by agency): Technical Merit and Innovation, Team Qualifications, Potential for Commercialization, and alignment with Agency Needs. Here is how to maximize your score on each.

Technical Merit: Clearly define the problem, your proposed approach, and why your approach is innovative. Reviewers need to understand what is new — not just what you will build, but why existing solutions are insufficient. Include preliminary data if available. Be specific about methodology, not just objectives.

Team Qualifications: The Principal Investigator is the most scrutinized element of an SBIR proposal. Demonstrate directly relevant expertise through publications, patents, prior R&D, or industry experience. If your team has gaps, acknowledge them and describe your plan to fill them (consultants, subcontractors, partnerships).

Commercialization Plan: This is where most first-time applicants are weakest. Agencies want to see that you have thought beyond the lab. Identify specific customers (government and commercial), estimate market size with evidence, describe your go-to-market strategy, and explain how SBIR funding accelerates a path that is already in motion.

Common rejection reasons include: proposal doesn't address the topic, unclear innovation over state-of-the-art, weak or missing commercialization plan, PI lacks relevant expertise, proposal is poorly organized or exceeds page limits, and budget doesn't align with proposed work.

Before you submit, have someone outside your team read the proposal. If they cannot explain your innovation, approach, and commercialization plan after reading it, the reviewers won't be able to either.

Timeline and What to Expect

Understanding the SBIR timeline helps you plan resource allocation and set realistic expectations for when funding will arrive.

Solicitation to Submission: Most agencies provide 60 to 90 days between topic release and proposal due date. DoD pre-releases topics 30 days before the submission window opens. Use the pre-release period to evaluate topics, contact Topic Authors for clarification, and begin drafting.

Evaluation Period: After submission, expect 3 to 6 months for evaluation. DoD typically notifies within 90 days. NIH uses study sections with fixed review cycles. Some agencies provide debriefs for unsuccessful proposals — always request one.

Phase I Performance: Once awarded, Phase I performance periods are 6 to 12 months. Use this time not just to complete the research but to build relationships with the program office, understand their operational needs, and position yourself for Phase II.

Phase I to Phase II Transition: Most agencies invite Phase I awardees to submit Phase II proposals 30 to 60 days before Phase I ends. Some agencies (DoD) use a competitive Phase II process; others (NIH) allow sequential Phase II applications.

Success Rates: Phase I success rates vary by agency from 15% to 25%. Phase II rates are higher, typically 40% to 50% of Phase I awardees. These rates are significantly better than typical venture capital or grant programs. The key is targeting the right agency and topic.

SBIR Resources and Support

Several free resources can help you navigate the SBIR program more effectively.

SBIR.gov: The central hub for all SBIR and STTR solicitations, past awards, and program information. Create an account to receive notifications when new topics are released in your technology area.

Defense SBIR/STTR Innovation Portal (DSIP): The DoD's SBIR submission and management portal. All DoD SBIR proposals are submitted through DSIP, and you can track your proposal status here.

Technical and Business Assistance (TABA): SBIR awardees can use up to $6,500 (Phase I) or $25,000 (Phase II) for technical and business assistance from third-party consultants. This is funding you can use for market research, IP strategy, regulatory guidance, and commercialization planning.

Procurement Technical Assistance Centers (PTACs): Free counseling services funded by the DoD to help small businesses understand and participate in government contracting. PTACs provide one-on-one counseling, proposal review, and training.

SBA Learning Center: Free online courses covering SBIR basics, proposal writing, commercialization planning, and small business management.

Matter Labs works directly with startups pursuing SBIR funding, from topic identification through proposal submission and Phase III transition. Our operational relationships with DoD program offices and testing facilities like FATHOMWERX give our clients direct access to the decision-makers who define SBIR topics and evaluate proposals.