SBIR and STTR explained: America's Seed Fund for small businesses
SBIR and STTR explained: how America's Seed Fund works, phases and award ranges, eligibility, finding solicitations and preparing a proposal.
If you run a US technology company, the Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) programs are likely the largest source of non-dilutive funding available to you. Together they are branded America's Seed Fund. This guide explains how they work, using the official SBIR.gov description.
What SBIR and STTR are
According to SBIR.gov, the programs, powered by the Small Business Administration, award non-dilutive funding to help small businesses develop technology and chart a path toward commercialization. SBIR.gov states that the government takes 0% equity or IP ownership. The programs are designed to stimulate technological innovation, meet federal research and development needs, and increase commercialization.
The SBA's grants page confirms that SBIR and STTR are the federal programs for small businesses engaged in scientific R&D, and that the SBA does not provide grants for starting and expanding a business. In other words, SBIR and STTR are research funding, not general business grants.
SBIR vs STTR. STTR requires the small business to collaborate formally with a research institution, such as a university or federal laboratory. SBIR does not require that partnership, though partnering is allowed.
The three phases
SBIR.gov describes three phases:
- Phase I: Proof of concept. Typically 6 to 12 months, with awards listed at $50,000 to $275,000.
- Phase II: Technology development. Typically 24 months, with awards listed at $750,000 to $1.8 million.
- Phase III: Commercialization. Taking the product to the commercial market or selling into federal contracting. Phase III is not funded by SBIR or STTR program dollars, but it can involve federal contracts.
Exact award sizes and durations vary by agency and solicitation. Always use the figures in the specific solicitation.
Is SBIR right for you?
SBIR.gov lists three quick self-checks:
- You are a small business with fewer than 500 employees.
- Your company's technology could help support government missions.
- You are looking for equity-free funding to develop your ideas.
Additional eligibility rules, such as ownership requirements and where work must be performed, are set by the program and each solicitation.
Which agencies participate
Several federal agencies run SBIR and STTR programs, each with its own topics, timelines and processes. Some issue grants and others issue contracts. Agencies with large R&D budgets, including defence, health, energy, NASA and the National Science Foundation, are common sources. Each agency's approach differs:
- Some publish specific topics and expect proposals to address them closely.
- Others accept proposals across broad research areas.
- Some offer opportunities to talk with program staff before submitting.
Start by browsing current solicitations on SBIR.gov and reading each agency's instructions.
Registrations you will need
SBIR and STTR applicants typically need:
- An active registration in SAM.gov with a Unique Entity ID.
- Registration on SBIR.gov.
- Agency-specific accounts, and for some agencies a Grants.gov registration.
Start these early. Grants.gov notes that SAM.gov registration can take up to 10 business days to become active, and longer if information needs verification.
Writing a competitive proposal
Match the topic. If the agency uses topics, address the stated need precisely.
Show technical innovation. Explain what is new, what risk you are retiring in Phase I, and how you will measure success.
Show commercial potential. Reviewers want to see a path to market, whether that is commercial customers, government buyers or both.
Show the team. Highlight relevant expertise and, for STTR, the role of the research institution.
Build a credible budget. Follow the solicitation and federal cost principles in 2 CFR Part 200 where they apply, or the contract rules where the award is a contract.
Support resources
SBIR.gov notes that supporting organizations help technology entrepreneurs identify opportunities and apply. The SBA also funds the FAST Partnership Program, which, according to its grants page, supports state and regional organizations working to increase SBIR and STTR proposals and awards. Check for a FAST or similar program in your state.
Frequently asked questions
Do I give up equity? SBIR.gov states the government takes no equity or IP ownership.
Can a pre-revenue startup apply? Yes, many SBIR applicants are early-stage companies. Eligibility depends on size, ownership and other rules, not revenue.
Can I apply to multiple agencies? Yes, but you must not receive duplicate funding for the same work, and proposals must disclose related submissions as required.
How long from submission to award? Timelines vary by agency and solicitation.
SBIR and STTR reward companies with real technical innovation and a credible path to market. Pick the right agency, address its needs precisely, and start registrations early.
Before you apply: a quick checklist
- Read the current official program page and applicant guide, not a summary of last year's version.
- Confirm you are eligible: organization type, size, location and years in operation.
- Confirm your project is eligible: the activities and costs the program actually funds.
- Classify the money: grant, repayable contribution, loan, tax credit or service.
- Work out your share: cost share, matching funds and the cash you need before reimbursement.
- Note the intake window or deadline and the time zone, and plan to submit days early.
- Ask the program contact any question you cannot answer from the guide.
- Do not start spending until you have a signed agreement or written approval.
Mistakes that sink otherwise good applications
- Applying to a program that does not fit, in the hope that reviewers will stretch the rules. They rarely do.
- Copying last year's application without checking what changed in the guide.
- Vague outcomes. Say what will change, for whom, and how you will measure it.
- A budget that does not match the narrative. Every cost should connect to an activity you describe.
- Submitting at the last minute, when portals are busy and there is no time to fix errors.
Keep exploring on GrantSift
Find the programs that fit you
Official program pages are the source of truth, but finding them is the slow part. GrantSift pulls grants and funders from official sources such as Grants.gov and Government of Canada open data into one searchable database covering the US and Canada across every sector. Each listing links back to the official page, and paid plans unlock funder contacts, deadlines you can track, and filters that match programs to your business or organization. Search grants on GrantSift or see plans and pricing.