Congress requires every federal agency with a big external R&D budget to set aside a slice of it for small businesses: 3.2% of extramural R&D for SBIR, plus another 0.45% for the sister STTR program at the five largest agencies. Eleven agencies participate — the Department of Defense is by far the biggest (over $2 billion a year on its own), followed by HHS/NIH, DOE, NASA and NSF, with smaller programs at USDA, Commerce (NIST/NOAA), DHS, DOT, Education and EPA.
That adds up to roughly $4 billion every year, awarded competitively to companies with 500 or fewer employees. It has funded early work at companies like Qualcomm, Symantec, and iRobot. Nobody takes a board seat. Nobody takes equity.
Both, depending on the agency, and the difference matters. NSF, DOE, USDA and most of NIH make grants: you propose your own idea, and execution is flexible. DoD, NASA, DHS, DOT and EPA issue contracts: the agency publishes topics describing what it wants, and you deliver against milestones. First-timers often pick an agency by culture as much as by dollars — we compare them in SBIR grants vs. contracts.
Yes — with a story attached. The program's authorization lapsed on September 30, 2025 (the first full lapse in its 43-year history) and new solicitations froze for about six months. On April 13, 2026 the Small Business Innovation and Economic Security Act was signed, reauthorizing SBIR/STTR through September 30, 2031 and adding a new late-stage "Strategic Breakthrough" Phase II worth up to $30 million at large agencies. Agencies restarted solicitations in spring 2026, so this year's deadlines are compressed and unusual — check each agency's live page rather than trusting older calendars.
Real R&D work: your own salary, your team, materials, subcontractors, overhead, even a small fee. Phase I (feasibility) currently runs up to roughly $323K depending on the agency; Phase II (prototype development) up to roughly $2.15M. The full ladder — including the Phase III sole-source rights that make defense primes take your calls — is in SBIR Phase I, II and III explained.
Most winning Phase I proposals lean on preliminary evidence, and computational modeling is the cheapest legitimate way to generate it before you have funding. If your concept lives in airflow, stress, heat, or electromagnetics, engineering simulation like Ansys can carry that load — and there are paths to start using it at no cost while you're still pre-funding.
See if you qualify for an Ansys eval + engineering support at no cost How access works →SBIR rewards technical risk. If your product is an app or an integration, it's usually a poor fit. If it's hardware or physics — a device, a vehicle, a sensor, a material, an energy system, an implant — it's exactly what the program exists for. Win rates at the major agencies run roughly 15–25% for Phase I, and first-time applicants win awards every cycle. You don't need a PhD, you don't need revenue, and you can be a solo founder. You do need to be a U.S. small business by the time of award — the details, including what pre-incorporation teams can do today, are in SBIR eligibility.
Official sources for this guide: SBIR.gov — About · SBA · Congress.gov — CRS report on SBIR. Figures change; always confirm on the official page before relying on them.
What each phase funds, current dollar caps, how long each really takes, and the shortcuts (D2P2, Fast-Track, TABA).
Read →The ownership, size and PI rules — and exactly what you can do before you've formed a company.
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