The SBIR (Small Business Innovation Research) program — often called America's Seed Fund — awards non-dilutive federal grants and contracts to US small businesses developing innovative technology with commercial potential. To apply, you register your company in the federal systems, pick a participating agency whose topic matches your technology, and submit a proposal that covers technical innovation, commercial opportunity, and team capability. Phase I awards typically fall in the tens to low hundreds of thousands of dollars for feasibility work; Phase II awards often reach seven figures for full development. Because the money is a grant or contract, not an investment, you give up no equity.

Who is eligible for SBIR funding

The core eligibility rules are consistent across agencies:

  • Your company must be a for-profit US small business with 500 or fewer employees.
  • It must be majority-owned by US citizens or permanent residents (or by other qualifying small businesses, and in some programs by venture-backed entities under specific conditions).
  • The principal investigator must be primarily employed by the company during the project.
  • The research must be performed mainly in the United States.

You do not need revenue, a finished product, or even a full-time team to apply — many first-time awardees are two-person startups with a strong technical concept. If your innovation grew out of university research and you want to keep an academic partner deeply involved, the sister STTR program may fit better; the differences are covered in our comparison of SBIR vs STTR.

The three SBIR phases explained

Phase I — proving feasibility

Phase I funds a focused feasibility study: can your approach actually work? Projects usually run six to twelve months. The deliverable that matters is evidence — test data, a working proof-of-concept, or analytical results that de-risk the core technical questions. A credible prototype development plan with measurable milestones is central to a fundable Phase I proposal.

Phase II — building the product

Phase II continues successful Phase I projects into full research and development, typically over two years, with substantially larger budgets. Reviewers now weigh commercialization heavily: letters of intent from customers, a realistic cost model, and a path to manufacturing all strengthen the application. We break down what changes between the stages in SBIR Phase I vs Phase II.

Phase III — commercialization

Phase III is the transition to the market or to government procurement. It is not funded by SBIR dollars, but SBIR awardees get valuable sole-source contracting advantages with federal agencies.

Choosing the right agency and topic

Eleven federal agencies participate, and they behave differently. NSF and NIH issue grants and welcome investigator-defined topics in broad areas; DoD, NASA, and DHS mostly issue contracts against specific solicitation topics they want solved. Read recent awards in your field on the official SBIR topic search to see what each agency actually funds, then match your proposal to the agency's mission language. A drone inspection tool, a medical wearable, and an energy storage material each have a natural home — forcing a mismatch is one of the most common reasons strong technology gets declined.

What a winning proposal contains

  • A sharp technical hypothesis. State exactly what is unproven and how you will prove it, with quantitative success criteria.
  • Real innovation. Reviewers reject incremental engineering; show what is genuinely new versus the state of the art.
  • Commercial evidence. Market size, customer conversations, and a credible revenue path — the same discipline that drives good new product development.
  • A capable team. Cover technical gaps with named consultants or subcontractors rather than leaving them open.
  • A clean budget. Justify every line; padding is obvious and costs credibility.

Common mistakes that sink applications

Late registrations are the classic killer — SAM.gov and agency systems can take weeks, so register before you write. Other frequent failures: proposing product development with no research question, ignoring the solicitation's evaluation criteria, vague milestones, and submitting the same generic proposal to multiple agencies. Success rates for well-prepared first submissions are meaningful, and most agencies provide reviewer feedback, so a decline is often the setup for a stronger resubmission. SBIR is also just one lane — see the wider landscape of grants for inventors and other government funding programs before committing your roadmap to a single source.

Turn your SBIR plan into working hardware

Reviewers fund teams that can execute. Projects House helps founders turn a technical concept into the feasibility data, engineering plan, and working prototypes that make a Phase I proposal credible — and the manufacturable product a Phase II demands. Contact us through the form to discuss your project before you write your application.