TL;DR: SBIR Phase 1 is the concept phase of the Small Business Innovation Research program. It funds a short project, typically six to twelve months, to show your technology is technically feasible and has commercial potential. Agencies evaluate small business qualification, degree of innovation, technical merit and future market potential. To win, pick a topic that truly fits your technology, answer the agency's problem directly, show a credible team and plan, and back your commercialization story with real customer evidence.

Key takeaways

• Phase 1 proves feasibility. It's the entry point to larger Phase 2 and Phase 3 opportunities.
• Agencies score innovation, technical merit and market potential, so your proposal must show all three.
• Topic fit matters more than clever writing.
• Customer evidence makes your commercialization section credible.

What is SBIR Phase 1?

The Small Business Innovation Research (SBIR) program and its sister program, STTR, fund small businesses to develop technology that serves government missions and has commercial potential. Both run in three phases. According to SBIR.gov's program basics tutorial:

• Phase I is the concept phase. It lasts six to twelve months and supports exploration of the technical merit or feasibility of an idea or technology.
• Phase II awards may last up to two years and expand on Phase I results.
• Phase III is when the innovation moves into the marketplace. No SBIR funds support this phase, so the business must find private or other non-SBIR federal funding.

How much does SBIR Phase 1 pay?

It depends on the agency. SBIR.gov notes that as of October 16, 2026, agencies may issue a Phase I award up to $335,937 without seeking SBA approval. Individual agencies set their own amounts within that.

NASA, for example, lists its SBIR/STTR Phase I investment as up to $225,000, with a six-month period of performance for SBIR and 13 months for STTR. NASA calls Phase I the "idea generation" phase, during which small businesses establish the scientific, technical and commercial merit and feasibility of their innovation. On August 7, 2026, NASA announced it selected 51 Phase I proposals from small business teams in 17 states.

Always check the current solicitation for exact amounts and rules.

Which agencies fund space-related SBIR Phase 1 work?

• NASA: technology for exploration, science, aeronautics and space operations.
• Department of Defense, including the Space Force: SpaceWERX, the Space Force's innovation arm, uses SBIR/STTR funding for emerging space technologies.
• Other agencies such as NOAA or the Department of Energy for specific applications.

Each agency runs its own program and publishes its own topics and timelines.

What's the difference between SBIR Phase 1 and Phase 2?

	Phase 1	Phase 2
Purpose	Prove feasibility	Develop the technology
Typical length	Six to twelve months	Up to two years
Award size	Smaller	Larger
Output	Feasibility results and a plan	Prototype or demonstrated capability
Commercialization	Plan and early evidence	Stronger evidence and partners

Phase 1 results are usually the foundation for a Phase 2 proposal, so plan your Phase 1 work with Phase 2 in mind.

How do agencies evaluate SBIR Phase 1 proposals?

SBIR.gov says agencies make awards based on small business qualification, degree of innovation, technical merit and future market potential. In practice, reviewers ask:

1. Does this solve our stated problem? Read the topic closely and answer it directly.
2. Is it new? Explain what's innovative compared with current approaches.
3. Is the plan credible? Clear objectives, tasks, milestones and risks.
4. Can this team deliver? Relevant experience and the right people.
5. Will it go somewhere? A believable path to government and commercial use.

How do you write a stronger SBIR Phase 1 proposal?

Pick the right topic

Don't bend your technology to fit a topic. Find topics that match what you're already building. A strong fit beats a clever stretch.

Talk to the topic author when allowed

Many solicitations allow questions during a pre-release period. Use it to understand what the agency really needs. Follow the solicitation's rules exactly.

Lead with the problem

Open with the agency's problem in their language, then show how your approach solves it.

Make the technical plan concrete

Define feasibility objectives you can actually prove within the period of performance, and the measurements that show success.

Show real commercialization evidence

This is where many technical founders are weakest. Letters of support, pilot interest and customer interviews make your market story credible. Our guide on how to get leads for a satellite company shows how to find and talk to potential customers.

Get registered early

Federal awards need registrations such as SAM.gov, which can take time. Start well before the deadline.

How does Phase 1 connect to the rest of your funding?

Phase 1 is a validation signal. It shows investors and customers that a government agency backed your technology. Our space startup funding guide explains how SBIR fits with angels, VC and customer revenue, and our guides on how to sell to NASA and how to sell to Space Force cover the path to larger contracts.

Announce your award well. Our contract and funding announcement playbook turns a win into pipeline.

A Phase 1 award is also a marketing asset. Our space marketing guide shows how to turn awards and early results into credibility with buyers.

What mistakes do space startups make with SBIR Phase 1?

• Weak topic fit. Reviewers notice when a proposal is stretched to fit.
• Vague objectives. Feasibility must be measurable.
• Thin commercialization. "Large market" isn't evidence. Customer conversations are.
• Late registration. Missing registrations can block an award.
• Treating Phase 1 as the goal. It's the start of a path, so plan for Phase 2 and beyond.

For more on where to begin, see how to start a space company, how to become a space entrepreneur and our space industry lead generation service for building the customer pipeline your commercialization plan needs.

How should you plan your time for a Phase 1 proposal?

Start several weeks before the deadline. Spend the first stretch on topic selection, questions to the agency and registrations. Use the middle for the technical plan, team and commercialization sections, including collecting letters of support. Leave the final week for review by someone outside the team, compliance checks and submission. Late, rushed proposals are easy for reviewers to spot.

Frequently asked questions

What is SBIR Phase 1?

The concept phase of the SBIR program. SBIR.gov says it lasts six to twelve months and supports exploration of the technical merit or feasibility of an idea or technology.

How much is an SBIR Phase 1 award?

It varies by agency. SBIR.gov says agencies may issue Phase I awards up to $335,937 without SBA approval as of October 16, 2026. NASA lists its Phase I investment as up to $225,000.

What is the difference between SBIR Phase 1 and Phase 2?

Phase 1 proves feasibility over a short period. Phase 2 lasts up to two years and develops the technology based on Phase 1 results.

Does SpaceWERX offer SBIR funding?

Yes. SpaceWERX, the innovation arm of the U.S. Space Force, uses SBIR/STTR funding to develop and transition emerging technologies.

How do I improve my chances of winning SBIR Phase 1?

Choose a topic that fits your technology, answer the agency's problem directly, set measurable feasibility objectives, show a capable team and back your commercialization plan with customer evidence.

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