The federal government sets aside nearly $6 billion every year for small businesses to develop new technology. You don’t need to give up equity. You don’t need a PhD. The programs are called SBIR and STTR, and Congress just reauthorized them through 2031 with the biggest structural changes in a decade.
If you run a small business with a technology idea, an engineering solution, or a scientific innovation, these programs were built for you. They are the largest source of early-stage, non-dilutive federal funding in the country.
This guide explains how the SBIR STTR program works for small business owners, whether you qualify, and exactly how to apply.
What You Will Learn
- Understand what SBIR and STTR are and how they differ from traditional government contracts
- Know the eligibility requirements and whether your business qualifies
- Learn how the three program phases work and how much funding each provides
- Identify which of the 11 federal agencies funds research in your field
- Apply the new 2026 reauthorization rules, including a brand-new post-Phase II funding tier
- Take the first steps to find and apply for your first SBIR or STTR solicitation
The SBIR STTR Program: Small Business R&D Funding Explained
SBIR (Small Business Innovation Research) and STTR (Small Business Technology Transfer) are federal programs that pay small businesses to conduct research and develop new technology. The funding is non-dilutive. You keep 100% ownership of your company.
Congress created SBIR in 1982 and added STTR in 1992. Both programs require federal agencies to set aside a percentage of their research budgets specifically for small businesses. Eleven agencies participate, and the combined annual funding reached nearly $6 billion in recent years per the Congressional Research Service (Report R48629, 2025).
Unlike traditional government contract set-asides, SBIR and STTR don’t ask you to deliver a finished product. You’re being funded to prove whether an idea works, then develop it into something the government or the commercial market can use.
The SBA (Small Business Administration) coordinates the program across all participating agencies. Individual agencies run their own solicitations, evaluate proposals, and make awards. The SBA sets policy, tracks results, and reports to Congress. You can find all open solicitations at sbir.gov.
One thing most guides miss: SBIR and STTR awards can be either grants or contracts, depending on the agency. That distinction matters for how you manage the work and what you’re obligated to deliver. More on that below.
SBIR vs. STTR: What Is the Difference?
The core difference is straightforward. SBIR lets your small business do the research on its own. STTR requires you to formally partner with a nonprofit research institution like a university or federally funded lab.
Everything else flows from that one distinction: who does the work, who can serve as principal investigator (PI), and how much of the research each party must perform.
| Feature | SBIR | STTR |
|---|---|---|
| Research partner required? | No (collaboration optional) | Yes (nonprofit research institution) |
| PI must be employed by small business? | Yes (primarily employed) | No (can be at research partner, except at NSF) |
| Minimum work by small business (Phase I) | 67% | 40% |
| Minimum work by small business (Phase II) | 50% | 40% |
| Minimum work by research institution | N/A | 30% |
| Number of participating agencies | 11 | 6 |
| Agency budget threshold | More than $100 million extramural R&D | More than $1 billion extramural R&D |
| Set-aside percentage | 3.2% | 0.45% |
| Annual funding (fiscal year (FY) 2022) | ~$4.4 billion | ~$662 million |
When to choose SBIR: Your business has in-house R&D capability and you want to keep full control of the project. Your principal investigator works for your company.
When to choose STTR: You need access to a university lab, specialized testing equipment, or academic expertise that your company doesn’t have. STTR is designed for exactly this situation.
You can apply to both programs at the same time for different topics. There’s no rule against it. Many companies pursue SBIR for some projects and STTR for others based on what each project requires.
One detail that trips people up: only six agencies run STTR programs (DoD, DOE, HHS, NASA, NSF, and USDA). If you want STTR funding from one of the other five agencies, it’s not available. Those agencies only participate in SBIR. Your SBA size standard still determines whether your business qualifies as small.
Who Is Eligible for SBIR and STTR?
The eligibility rules are the same for both programs. If your business meets five requirements, you can apply.
- For-profit business. Your company must be organized for profit. Nonprofits with 501(c)(3) status are not eligible. Sole proprietorships, LLCs, S-corps, and C-corps all qualify.
- 500 or fewer employees. Part-time, full-time, and leased workers all count toward this number.
- At least 51% U.S. owned. Your business must be at least 51% owned by U.S. citizens or permanent resident aliens. It also qualifies if 51% or more is owned by another small business that meets the same ownership test.
- Research conducted in the United States. The R&D work must happen domestically. Some agencies allow limited foreign subcontracting, but the core research stays in the U.S.
- SAM.gov registration. Required for contract-based awards (DoD, NASA, and others). Recommended for all applicants. If you haven’t registered yet, here’s our step-by-step SAM.gov guide. You’ll also need a UEI number, which SAM.gov assigns automatically during registration.
A common misconception keeps people from applying: they assume you need a PhD, a laboratory, or previous government contracts. You don’t. The programs are open to any qualifying small business with a technically credible idea and the team to execute it. Your NAICS codes don’t need to be research-specific either.
The Principal Investigator Requirement
For SBIR, the PI must be “primarily employed” by your small business during the award period. That means the PI can’t work full-time at another company while leading your SBIR project.
STTR is more flexible. At five of the six STTR agencies, the PI can work at either your business or the research partner institution. The exception is NSF, which requires the PI to be primarily employed by the small business (same rule as SBIR).
New in 2026: Security Screening
The March 2026 reauthorization added mandatory due diligence for all applicants. Agencies now screen every proposal against eight federal watchlists covering foreign ownership, cybersecurity practices, personnel affiliations, patent portfolios, and investment relationships.
This doesn’t mean companies with international connections can’t apply. The screening creates a framework for evaluating risk, not a ban. If an agency denies an application based on security concerns, it must provide a written explanation. Denials don’t permanently block future eligibility.
How the Three Phases Work (and How Much They Pay)
The SBIR STTR program small business funding moves through three phases. Each one builds on the last: prove it works, build it out, and bring it to market. A new fourth tier, Strategic Breakthrough Awards, was added by the 2026 reauthorization.
Phase I: Feasibility and Proof of Concept
Phase I is where most first-time applicants start. The goal is simple: demonstrate that your idea has technical merit and commercial potential.
- Typical awards: $150,000 to $275,000 depending on the agency
- Maximum ceiling: $314,363 per award including modifications (as of 2024, per SBA policy)
- Duration: Six months to two years, depending on the agency
- Success rate: According to SBA annual reports, between 9% and 20% of applicants receive Phase I awards
Phase I proposals are relatively short compared to a full government contract proposal. You’re making a case for feasibility, not delivering a finished solution. Most agencies provide detailed topic descriptions that tell you exactly what they’re looking for.
If your Phase I results are strong, you become eligible for Phase II. Some agencies also offer a “Direct-to-Phase-II” path for companies that can demonstrate feasibility with their own prior research.
Phase II: Full Research and Development
Phase II is the main R&D phase. This is where you take the concept you proved in Phase I and develop it into a working prototype or a validated technology.
- Typical awards: $750,000 to $1.75 million depending on the agency
- Maximum ceiling: $2,095,748 per award including modifications (as of 2024, per SBA policy)
- Duration: One to three years
- Success rate: 35% to 50% of Phase I awardees receive Phase II funding
The jump in funding from Phase I to Phase II is significant. A company that received $200,000 in Phase I might receive $1.5 million in Phase II. The work also gets more demanding. Agencies expect clear progress, milestone reporting, and a realistic plan for how the technology reaches the market.
Phase III: Commercialization
Phase III uses no SBIR or STTR funding. Instead, the company moves its technology into production using private capital, non-SBIR government contracts, or commercial sales.
Here’s what makes Phase III valuable: federal agencies can sole-source Phase III contracts to SBIR/STTR awardees without full competition. That means if an agency wants to buy your technology after Phase II, it can award you a contract directly. There’s no set dollar limit on Phase III awards.
Phase III has been historically underused. Many contracting officers didn’t know they could sole-source these contracts. The 2026 reauthorization addresses this directly by mandating Phase III training for the acquisition workforce.
New in 2026: Strategic Breakthrough Awards
The biggest change in the March 2026 reauthorization is a brand-new funding tier. Strategic Breakthrough Awards bridge the gap between Phase II (roughly $2 million) and full commercial production, which often requires tens of millions of dollars.
- Maximum award: $30 million per company
- Performance period: Up to 48 months
- Eligibility: Must hold at least one prior Phase II SBIR or STTR award
- Matching funds required: 100% from non-SBIR sources (private investment, non-SBIR government contracts, or revenue)
- DoD-specific rule: DoD requires a 200% match, with at least 20% from non-SBIR DoD sources
- Agency cap: 0.50% of each agency’s extramural R&D budget annually
- First solicitations expected: Q4 of FY2026 (July through September 2026) for DoD and NIH
Only agencies with more than $100 million in annual SBIR obligations can offer Strategic Breakthrough Awards. That includes DoD, HHS/NIH, DOE, NASA, DHS, and EPA.
This funding tier directly addresses what practitioners call the “valley of death”: the gap where promising Phase II technologies stall because there’s no bridge funding between a $2 million research award and the capital needed for manufacturing or deployment.
Timeline: From Application to Funding
Plan for a long timeline between submitting your proposal and receiving money.
- Solicitation close to notification: Three to six months
- Notification to actual funding: Approximately nine months
- Total from submission to dollars in hand: Roughly 12 to 15 months
That timeline means you can’t count on SBIR/STTR as quick cash. Plan your operations and cash flow around the reality that funding takes about a year from the time you submit.
The 11 Participating Agencies and What They Fund
Eleven federal agencies run SBIR programs. Each one funds different types of technology. Your first step is finding the agency that matches your work.
| Agency | STTR Too? | What They Fund | Typical Phase I Award |
|---|---|---|---|
| Department of Defense (DoD) | Yes | Defense tech, cybersecurity, autonomous systems, advanced materials | $150,000-$275,000 |
| Health & Human Services / NIH | Yes | Biomedical research, drug development, medical devices, diagnostics | $275,000 |
| Department of Energy (DOE) | Yes | Clean energy, nuclear, grid modernization, advanced computing | $200,000 |
| NASA | Yes | Aerospace, Earth science, propulsion, space habitats | $150,000 |
| National Science Foundation (NSF) | Yes | Broad technology, AI/ML, quantum computing, deep tech | $275,000 |
| Dept. of Agriculture (USDA) | Yes | AgTech, food safety, rural development, precision agriculture | $125,000-$175,000 |
| Dept. of Commerce (NOAA/NIST) | No | Weather technology, ocean science, measurement standards | $150,000 |
| Dept. of Education | No | EdTech, learning sciences, special education tools | $250,000 |
| Dept. of Homeland Security (DHS) | No | Border security, cybersecurity, disaster response technology | $150,000 |
| Dept. of Transportation (DOT) | No | Autonomous vehicles, infrastructure monitoring, safety systems | $150,000 |
| Environmental Protection Agency (EPA) | No | Environmental monitoring, water treatment, pollution control | $100,000 |
DoD and NIH account for the majority of all SBIR/STTR funding. They also attract the most competition. If you’re a first-time applicant, consider starting with smaller agencies like EPA, DOT, or USDA. Fewer applicants means better odds, and the awards still range from $100,000 to $200,000 in Phase I.
Browse open topics from all 11 agencies at sbir.gov/topics. Each agency publishes specific research topics it wants to fund. Your proposal must respond to one of these topics. You can’t propose a topic the agency hasn’t listed.
Not registered on SAM.gov yet? That’s your first step before applying for any SBIR or STTR funding. Read our free SAM.gov registration guide to get started. Need hands-on help? Find your local APEX Accelerator for free one-on-one assistance with SBIR proposals and registration.
Grants vs. Contracts: How SBIR Funding Works in Practice
SBIR awards are not always grants. Some agencies issue contracts with legally binding deliverables. The type of award changes how you manage the project, what you owe the agency, and how you get paid.
| Feature | Grant | Contract |
|---|---|---|
| Who defines the work? | You (the PI) | The agency |
| Deliverables | Best-effort | Legally binding |
| Reporting | Periodic, less detailed | Frequent, milestone-based |
| Payment structure | Lump sum or periodic draws | Milestone-based payments |
| Flexibility to change direction | High | Low |
Grant agencies: DOE, NSF, USDA, and NOAA (part of Commerce). These give you more freedom to define your research approach and adjust as you learn.
Contract agencies: DoD, NASA, DHS, EPA, and DOT. These define specific deliverables up front. You’re entering a binding agreement to produce specific results on a specific timeline.
Both: HHS/NIH primarily issues grants but also has some contract-based topics.
Check the solicitation before you apply. The funding mechanism is stated near the top of the document. If you’ve read our guide on how to bid on government contracts, you already know how to read a solicitation. The same skill applies to SBIR contract topics.
How to Apply for Your First SBIR or STTR Award
Applying for SBIR or STTR funding follows a clear process. Several free resources exist to help you through every step.
The Six-Step Application Process
- Register on SAM.gov if you haven’t already. Contract-based awards require it. Grant-based awards practically require it. Registration is free and takes about an hour, though validation takes one to three weeks. Follow our SAM.gov guide.
- Browse open solicitations at sbir.gov or the specific agency’s SBIR portal. Each solicitation lists research topics the agency wants to fund.
- Match your technology to a specific topic. Don’t force a fit. If no topic matches your technology closely, wait for the next solicitation cycle. Agencies release new topics regularly.
- Write your proposal following the solicitation’s exact format requirements. Font size, page limits, section headings: follow them precisely. Proposals that violate format rules get rejected before anyone reads the content.
- Submit before the deadline. Late submissions are rejected without exception. Plan to submit at least 48 hours early in case of technical issues with the submission portal.
- Wait for notification. Expect three to six months. If you don’t win, request reviewer feedback. That feedback is the most valuable tool for improving your next submission.
Tips from Experienced SBIR Applicants
- Start with the right agency, not the biggest check. A $100,000 EPA Phase I with less competition is more attainable than a $275,000 NIH Phase I with hundreds of applicants.
- Read the topic description three times. Tailor every section of your proposal to the specific topic. Generic innovation pitches don’t win SBIR awards.
- Budget conservatively. Not every agency funds to the maximum ceiling. Write a realistic budget that matches your actual costs.
- Expect to resubmit. Many successful SBIR companies won their first award on the second or third attempt. Reviewer feedback makes each submission stronger.
- Use free help. APEX Accelerators (find yours at aptac-us.org) provide free proposal review. SBDCs, state SBIR support programs, and agency-hosted workshops all exist to help first-time applicants.
If you’re brand new to government contracting, start with our beginner’s guide to understand the basics before jumping into SBIR proposals.
What Changed in 2026: The Reauthorization
The SBIR and STTR programs lapsed on October 1, 2025, when Congress couldn’t agree on renewal terms. For five months, no new solicitations were issued. Existing awards continued, but the pipeline froze.
On March 3, 2026, the Senate passed the Small Business Innovation and Economic Security Act (S. 3971) by voice vote. The House followed on March 17 with a 345-to-41 vote. The law extends authorization through September 30, 2031, ending the cycle of short-term renewals that had created uncertainty for years.
Here are the seven biggest changes (details on Strategic Breakthrough Awards and security screening are covered in the sections above):
- Authorization through 2031. Five full years of stability instead of recurring three-year cycles.
- Strategic Breakthrough Awards. A new post-Phase II funding tier of up to $30 million with matching fund requirements.
- Proposal caps. Starting in FY2027, agency SBIR/STTR directors can set annual limits on how many proposals a single firm submits. Limits must apply equally to all companies.
- Mandatory security screening. All applicants screened against eight federal watchlists. Six dimensions of due diligence: cybersecurity, foreign ownership, personnel affiliations, tech licensing, patents, and investment relationships.
- Administrative spending increase. From 3% to 3.3% of SBIR funds for 20 years, targeting rural outreach and fraud detection.
- Fellowship programs. Agencies must launch new programs at universities and national laboratories.
- Phase III training. Mandatory acquisition workforce training so contracting officers know they can sole-source Phase III contracts to SBIR/STTR awardees.
For small businesses, the bottom line is more funding options, longer-term program stability, and tighter scrutiny on foreign influence. If you’ve been waiting for the programs to restart, they’re back.
Frequently Asked Questions
Is SBIR a grant or a contract?
SBIR awards can be either grants or contracts. The type depends on which agency issues the award. DOE, NSF, USDA, and NOAA issue grants. DoD, NASA, DHS, EPA, and DOT issue contracts. NIH issues both. Always check the solicitation to confirm the funding type before applying.
What is the difference between SBIR and STTR?
SBIR lets your company conduct research independently. STTR requires a formal partnership with a nonprofit research institution such as a university. Under STTR, your business must perform at least 40% of the work and the research partner must perform at least 30%. Under SBIR, your business handles at least 67% in Phase I.
How much does SBIR pay?
Phase I awards typically range from $100,000 to $275,000, with a ceiling of $314,363 (as of 2024). Phase II ranges from $750,000 to $1.75 million, with a ceiling of $2,095,748. The new Strategic Breakthrough Awards created in 2026 can reach $30 million for qualifying companies with matching funds.
Do I need a PhD to apply for SBIR?
No degree requirement exists for SBIR or STTR. Your business needs 500 or fewer employees, at least 51% U.S. ownership, and a technically credible proposal. Relevant professional experience carries as much weight as academic credentials in most agency evaluations.
How long does it take to get SBIR funding?
Agencies typically notify winners three to six months after the solicitation closes. Actual funding arrives roughly nine months after notification. Budget approximately 12 to 15 months from the time you submit your proposal to the time money reaches your account.
Can I apply to multiple SBIR agencies at the same time?
Yes. You can submit different proposals to different agencies for different topics in the same cycle. You cannot submit the same proposal to multiple agencies. Each submission must be tailored to that agency’s specific topic and requirements.
What is the SBIR success rate?
Phase I success rates range from 9% to 20% depending on the agency. Smaller agencies like EPA and DOT tend to have less competition. Phase II rates are higher, with 35% to 50% of Phase I awardees receiving Phase II funding. Persistence pays off: many winners succeed on their second or third submission.
Do I need SAM.gov registration for SBIR?
Contract-based SBIR awards from DoD, NASA, DHS, EPA, and DOT require SAM.gov registration. Grant-based awards from DOE, NSF, and USDA may not strictly require it, but registration is free and practically necessary for any federal funding. Register before you apply.
Your Next Steps
- Check your eligibility. Confirm your business has 500 or fewer employees, is at least 51% U.S.-owned, and is organized as a for-profit entity.
- Register on SAM.gov. Go to sam.gov and click “Get Started.” Registration is free and takes about an hour. Our step-by-step guide walks you through it.
- Browse open solicitations. Visit sbir.gov/topics and filter by agency or keyword. Look for topics that match your technology or expertise.
- Contact your local APEX Accelerator. Find yours at aptac-us.org. They provide free one-on-one help with SBIR proposals, SAM.gov registration, and finding the right opportunities.
- Attend an agency SBIR workshop. Most agencies host free webinars for first-time applicants. Check the SBIR page on your target agency’s website for upcoming events.
The SBIR and STTR programs exist to turn small business ideas into federally funded innovations. The SBIR STTR program small business funding is there. The programs are stable through 2031. The only question is whether your next proposal is in the pile when agencies start making awards.
