SBIR and STTR programs pay small businesses to solve hard technical problems the federal government needs solved. They are not contracts in the traditional sense — you are not delivering a product or service — you are doing research and development on a defined problem, with the government funding the work.
> TL;DR: SBIR (Small Business Innovation Research) and STTR (Small Business Technology Transfer) are federal R&D grant programs administered through 11 agencies. Phase I awards run $150–$275K for a feasibility study. Phase II awards run $750K–$2M for full development. Phase III is commercialization with no federal funding cap, but you must attract private capital or non-SBIR contracts. You must be a for-profit U.S. small business with fewer than 500 employees, majority U.S.-citizen owned. Apply through sbir.gov. Timeline from solicitation to award is typically 6–12 months. If you are not doing technology development, this program is not for you.
What these programs actually are
Congress created SBIR in 1982 under the Small Business Innovation Development Act (15 U.S.C. § 638). The idea was direct: make federal R&D spending accessible to small businesses, not just universities and large defense contractors. Every federal agency with an extramural R&D budget above $100 million must set aside a minimum 3.2% of that budget for SBIR awards.
STTR (Small Business Technology Transfer) came later, in 1992. It requires a formal partnership between the small business and a research institution — a university, federally funded R&D center, or nonprofit research organization. At least 40% of the work must be performed by the small business, and at least 30% by the research partner. STTR minimum set-aside is 0.45% of each agency's extramural R&D budget.
These are not competitive contracts in the FAR sense. No SAM.gov registration is required to apply (though you will need it for Phase III work). There is no competitive bidding against other vendors on a defined statement of work. You are responding to a topic area the agency has published, with your own technical approach, and a review panel scores your proposal.
The 11 agencies that fund these programs
Not every federal agency runs SBIR and STTR. Participation is mandatory only for agencies with large enough R&D budgets. As of 2026, the following 11 agencies have active programs, each with its own solicitation calendar and focus areas:
| Agency | Common focus areas |
|---|---|
| Department of Defense (DoD) | Defense systems, cybersecurity, aerospace, materials |
| National Institutes of Health (NIH) | Biomedical research, diagnostics, therapeutics, health IT |
| National Science Foundation (NSF) | Deep tech, AI, quantum computing, climate tech |
| Department of Energy (DOE) | Clean energy, grid technology, nuclear, advanced manufacturing |
| NASA | Space systems, aeronautics, autonomous systems, sensors |
| Department of Agriculture (USDA) | AgTech, food safety, rural technologies |
| Department of Education (ED) | EdTech, assistive learning technology |
| Department of Homeland Security (DHS) | Border tech, cybersecurity, emergency response |
| Department of Transportation (DOT) | Autonomous vehicles, infrastructure tech, safety systems |
| Environmental Protection Agency (EPA) | Environmental monitoring, remediation technology |
| National Oceanic and Atmospheric Administration (NOAA) | Ocean tech, climate data, weather systems |
DoD is by far the largest funder, accounting for roughly half of all SBIR/STTR dollars. NIH and NSF are the next largest. If you are in defense tech, biotech, or deep tech, those three agencies are your primary targets.
The three phases
Phase I: Feasibility
Phase I is a proof-of-concept grant. The agency wants to know whether your technical idea is sound before committing larger funds. You are not expected to deliver a finished product.
Award amounts: - DoD: up to $250,000 (SBIR); up to $250,000 (STTR) - Non-DoD agencies: up to $275,000 (SBIR/STTR)
These are statutory ceilings set by the SBA SBIR/STTR Policy Directive. Actual awards often come in below the ceiling. The period of performance is typically 6 months.
Phase II: Full development
Phase II is where the serious R&D happens. You have proven feasibility; now the agency funds full development. Awards are larger and the work is expected to produce a working prototype or validated system.
Award amounts: - DoD: up to $1,750,000 - Non-DoD agencies: up to $2,000,000
Period of performance is typically 24 months. Not every Phase I recipient gets a Phase II. The agency reviews your Phase I results before making a Phase II award, and competition is real.
Phase III: Commercialization
Phase III is not funded by SBIR or STTR money. There is no federal cap on Phase III work, and there is no separate application. It represents the path from your developed technology to an actual product, either sold commercially or as a contract to the government.
Phase III work can include follow-on government contracts, and agencies are authorized under 15 U.S.C. § 638(r) to award non-competitive Phase III contracts to SBIR/STTR recipients for related work. This is significant. It means a successful Phase II can lead directly to sole-source Phase III contracts with the agency, bypassing the competitive acquisition process.
SBIR vs. STTR: the key difference
The programs are nearly identical in structure. The one substantive distinction is the principal investigator (PI) rule.
SBIR: The PI must be primarily employed by the small business at the time of the Phase I award and throughout the performance period. You cannot use a university professor as your PI on an SBIR.
STTR: The PI can be employed at the research institution partner. This matters if your core technical talent is at a university. STTR exists precisely for university spinouts and faculty-led research commercialization efforts. The tradeoff is that you must structure a formal joint research agreement and the research institution takes at least 30% of the award.
If you have a university partner and want their faculty to lead the technical work, use STTR. If your team is fully internal, SBIR is simpler.
Who qualifies
Eligibility requirements are defined in the SBA SBIR/STTR Policy Directive and 13 CFR Part 121:
- For-profit U.S. small business (LLCs, C-corps, S-corps qualify; nonprofits do not)
- Fewer than 500 employees at the time of award
- Majority U.S. citizen or permanent resident owned — more than 50% of the business must be owned by U.S. citizens or lawful permanent residents
- Primarily located in the United States — principal place of business is U.S.
- For SBIR specifically: the PI must be primarily employed by the applying firm
There is no revenue threshold. A one-person startup can win a Phase I award. Many do.
Who this is NOT for
SBIR and STTR are specifically for technology development. Agencies publish specific technical topics — discrete research problems they need solved. You respond to a topic. If your business does not map to one of those topics, there is no award to win.
This program is not for: - General services companies (staffing, facilities management, consulting) - Construction or trades contractors - Distributors or resellers - Marketing or communications firms - Any firm without technical R&D as a core business activity
The agencies are not shopping for general business capability. They are funding solutions to specific technical problems — a new sensor material, a cybersecurity algorithm, a novel drug delivery mechanism. If you cannot plausibly do that work, applying wastes your time. Federal set-aside programs like the 8(a) program, HUBZone, or WOSB are better options for general services firms. See Federal Set-Asides Explained for those programs, or the broader Government Contracting for Beginners guide for where to start.
How to find open solicitations
All SBIR and STTR solicitations are posted at sbir.gov, the central portal maintained by the SBA. The site lists open solicitations by agency, topic number, and technology focus area.
Agencies release solicitations on their own schedules. DoD publishes a large omnibus solicitation twice a year (called the DoD SBIR Broad Agency Announcement, or BAA). NIH has multiple rounds annually. NSF accepts applications on a rolling basis through its America's Seed Fund program.
The process at sbir.gov: 1. Create a free account 2. Browse open solicitations by agency or keyword 3. Read the specific topic descriptions — each topic has a technical point of contact at the agency 4. Contact the topic's technical point of contact before you apply. Agencies expect pre-submission contact and it genuinely improves proposals. 5. Submit a Phase I proposal through the agency's submission portal (not all use sbir.gov for actual submission)
Timeline: proposal to award
Expect 6–12 months from solicitation close to award. The DoD process tends to run longer than civilian agencies. Here is a representative sequence:
| Milestone | Typical timeframe |
|---|---|
| Solicitation opens | Day 0 |
| Proposal submission deadline | 45–90 days after open |
| Agency review period | 3–6 months |
| Award notification | 6–12 months from submission |
| Phase I performance period | 6 months |
| Phase I final report | Month 6 |
| Phase II application window | Typically 30–60 days after Phase I report |
Plan for cash flow gaps. Phase I awards are paid incrementally, and there is usually a gap between Phase I completion and Phase II award. Most SBIR recipients that survive Phase II do so because they have other revenue during the interim period — other contracts, product revenue, or investor capital.
One thing most guides don't mention
The SBIR Transition Rate is a public metric. Each agency reports the percentage of its Phase II awardees that reach Phase III commercialization. DoD publishes these rates by topic area and program manager. Looking at transition rates before choosing which agency to target tells you more about the program's actual commercial intent than anything in the solicitation text. A topic area with a 10% transition rate and one with a 40% transition rate are functionally different programs. The data is available at sbir.gov/analytics.
Frequently asked questions
Do I need to be registered on SAM.gov to apply for SBIR? No. SAM.gov registration is not required to submit a Phase I application. You will need it if you win a Phase III contract, since Phase III work is typically executed under a standard federal contract vehicle that requires SAM.gov active registration. Get the registration done anyway — it is free and takes 1–2 weeks.
Can I apply to multiple agencies at the same time with the same idea? The same or substantially similar work cannot be submitted to more than one federal agency concurrently, and cannot be funded under other federal grants or contracts at the same time (the prohibition on duplicate funding is in the SBA SBIR/STTR Policy Directive Section 3(ll)). However, you can apply to different topic areas at different agencies with different work.
Does an SBIR award count as a government contract for past performance? Yes. SBIR and STTR awards are recorded in FPDS (Federal Procurement Data System) and in your SAM.gov profile. Successful Phase I and Phase II performance builds the past performance record you need for traditional competitive contracts later.
I don't have a technology background. Can I partner with someone who does? For SBIR, the PI must be primarily employed by your firm. You cannot bring in an outside expert as the technical lead unless they work for you. For STTR, you can partner with a university and their faculty can lead the technical work. If neither applies, SBIR and STTR are probably not the right path.
What if I don't have a prototype yet — is Phase I too late to start? Phase I is explicitly designed for early-stage feasibility. You are not expected to arrive with a prototype. You need a technically sound approach and evidence that your team can execute it. The most competitive Phase I proposals have some preliminary data — even a lab experiment or simulation — but first-time applicants win without it if the technical idea is strong and the team is credible.
If you are unsure which federal certifications or programs fit your business, the certification quiz covers both traditional contracting programs and helps you think through whether R&D-track programs like SBIR are the right starting point.
Last reviewed: June 2026
