How to Find SBIR and STTR Opportunities: A 2026 Guide for Small Businesses

The federal government obligates roughly $4 billion a year in non-dilutive research funding through the SBIR and STTR programs, spread across 11 participating agencies and tens of thousands of topics over the program's lifetime. SBIR/STTR is the largest seed-stage funding source most small technology businesses have never seriously tried to win — partly because the opportunities are scattered across sbir.gov, the DOD's DSIP portal, NIH eRA Commons, NASA NSPIRES, DOE ARPA-E eXCHANGE, and a handful of others. Here is how the programs actually work, where to find SBIR and STTR opportunities, and how to stop missing the ones you should be bidding on.

TL;DR

• SBIR and STTR are federal R&D set-asides for small businesses. Combined, they obligate roughly $4 billion a year and have produced tens of thousands of topic solicitations across the program's history.
• 11 federal agencies participate: DOD (largest, runs DSIP), NIH, NASA, DOE, USDA, DOC (mostly NIST and NOAA), DHS, EPA, NSF, DOT, and ED. DOD and NIH together account for the majority of dollars.
• Phases matter. Phase I funds feasibility (typically $50K-$314K, 6-12 months). Phase II funds prototype development (typically up to $2M, ~24 months). Phase III is commercialization, with sole-source procurement authority but no SBIR dollars attached.
• Eligibility is strict. For-profit, U.S.-based, fewer than 500 employees, and at least 51% owned and controlled by U.S. citizens or permanent residents. STTR additionally requires a formal partnership with a nonprofit research institution.
• sbir.gov is the cross-agency aggregator, but it is not the workflow tool. You can search there. You usually have to submit somewhere else (DSIP for DOD, eRA Commons for NIH, NSPIRES for NASA, etc.).
• CLEATUS now indexes every active and historical SBIR/STTR topic from sbir.gov alongside federal contracts, grants, and state and local bids — so SBIR opportunities surface in the same pipeline as the rest of your federal pursuits, filterable by Phase, Topic Code, CMMC level, ITAR status, and export-control flags.

What SBIR and STTR Actually Are

The Small Business Innovation Research (SBIR) program was created by Congress in 1982 to do one specific thing: force federal R&D agencies to set aside a small fraction of their extramural research budget for U.S. small businesses. The Small Business Technology Transfer (STTR) program followed in 1992 with the same structure, but with an added requirement that the small business team up with a nonprofit research institution.

Both programs are managed government-wide by the SBA, which sets the framework, but every participating agency runs its own solicitations on its own schedule with its own rules. Each agency decides which of its mission topics to fund, what the award sizes look like, whether to fund as a contract or a grant, and how to evaluate proposals. SBA's role is to enforce eligibility, publish the policy directive, and maintain the cross-agency catalog at sbir.gov.

Two important things to understand before you read another word:

SBIR/STTR funding is non-dilutive. When you win an award, you do not give up equity, board seats, or IP rights. You keep your technology, you keep your company, you keep your cap table clean. For deep-tech startups and product companies, that is unusual money.

SBIR/STTR is competitive, not entitlement. Success rates vary by agency, topic, and phase, but most agencies fund somewhere between 10% and 25% of Phase I proposals. NIH and DOD fund the most dollars; NSF and DOE have some of the more competitive selection rates in specific topic areas. A "small business set-aside" does not mean you are competing against five other companies. You are competing against everyone in the U.S. who fits the eligibility criteria and decided this topic was worth a swing.

SBIR vs STTR: The Difference That Actually Matters

The programs look identical on the surface. The legal difference is the research partner requirement.

Dimension	SBIR	STTR
Research partner	Optional. Small business can do all of the work in-house.	Required. Must partner with a U.S. nonprofit research institution (university, FFRDC, or nonprofit research org).
Work share	Small business performs at least 67% of Phase I and 50% of Phase II.	Small business performs at least 40%; research institution performs at least 30%.
PI affiliation	Principal investigator's primary employment must be with the small business.	PI can be employed by either the small business or the research institution.
Funding amounts	Typical Phase I $50K-$314K; Phase II up to $2M.	Same baseline; agencies often align ceilings with SBIR.
Best for	Companies with in-house R&D capacity that own the technical work end-to-end.	Companies commercializing technology that originated in a university lab or that need deep institutional research support.

In practice, if you have a strong relationship with a university lab and the underlying science is upstream of your product, STTR is often the better fit. If your team can carry the R&D entirely in-house, SBIR is faster, cleaner, and gives you more control over the budget.

A common mistake first-time applicants make is to assume every topic is open to either SBIR or STTR. It is not. Each agency solicitation specifies the program. Some are SBIR-only, some are STTR-only, some are dual-program. Read the topic before you build the team.

The 11 Participating Agencies

By law, every federal agency with an extramural R&D budget over $100M must run an SBIR program (and over $1B for STTR). That puts 11 agencies in the program today, with very different mission scopes, award sizes, and submission portals.

Agency	Primary topic areas	Where you actually submit
DOD	Defense systems, autonomy, AI, cybersecurity, hypersonics, microelectronics, biotech, energy	DSIP (dodsbirsttr.mil)
HHS / NIH	Therapeutics, diagnostics, medical devices, digital health, biomedical research tools	eRA Commons + Grants.gov
NASA	Aerospace, propulsion, space systems, Earth science, low-Earth-orbit infrastructure	NSPIRES (nspires.nasaprs.com)
DOE	Clean energy, grid, fusion, nuclear, advanced materials, ARPA-E moonshots	DOE PAMS + ARPA-E eXCHANGE
USDA	Agriculture, rural development, food safety, forestry, animal production	NIFA + Grants.gov
DOC (NIST + NOAA)	Measurement science, advanced manufacturing, climate / ocean / weather instrumentation	Grants.gov + agency portals
DHS	Border security, cybersecurity, CBRN detection, transportation security	DHS S&T Long Range BAA + agency portal
EPA	Air, water, waste, environmental sensors, PFAS, sustainable materials	Grants.gov
NSF	Broad deep-tech: AI/ML, advanced materials, quantum, biotech, climate tech, edtech, robotics	NSF Research.gov
DOT	Surface transportation, autonomous vehicles, safety, infrastructure	Volpe Center solicitation portal
ED	Edtech, learning sciences, special education technology	IES SBIR portal

A few practical takeaways from this list:

DOD is the biggest funder but has the most opaque process. DSIP (the Defense SBIR/STTR Innovation Portal) is the single submission system for all of DOD — Army, Navy, Air Force, Space Force, DARPA, OSD, and the combatant commands. Each component publishes its own BAAs with their own pre-release, open, and close dates. DOD also runs "Direct to Phase II" (D2P2) and the open-topic "Open Topics" mechanism, which work differently than the classic agency-defined topic flow.

NIH posts on a rolling cycle. Three standard receipt dates per year (early January, early April, early September) for parent announcements. Specific Institutes (NCI, NIAID, NHLBI, etc.) also publish their own targeted Funding Opportunity Announcements.

NSF is the most "open" agency. Almost every NSF SBIR topic accepts proposals across a broad technology area rather than a narrow problem statement. Good for true deep-tech companies; demanding on the commercialization narrative.

The smaller agencies fund less but compete less. EPA, ED, USDA, and DOT collectively make hundreds of awards a year and routinely see lower applicant-to-award ratios than DOD or NIH on specific topics.

SBIR/STTR Phases I, II, and III

Every SBIR/STTR effort flows through a three-phase structure. Understanding what each phase is actually for — and how the dollars move — is what separates serious applicants from one-and-done Phase I shops.

Phase I: Feasibility

Phase I is a small, fixed-scope award to prove technical merit and feasibility. Typical scope is 6 to 12 months and $50K to $314K, depending on the agency. NIH allows up to $314K standard; DOD allows up to $314K for classic Phase I but runs many awards at $50K-$250K; NSF runs Phase I at up to $305K.

The deliverable is almost always a written final report plus, for some agencies, a brief progress review. The win condition is that you proved your idea could work and identified the next set of risks to retire in Phase II. Phase I is not a prototype build.

Phase II: Prototype and demonstration

Phase II is the real money. Typical scope is 24 months and up to $2M, with some agencies (NIH, DOD) routinely going higher under Phase II Sequential or Phase IIB enhancement mechanisms. You only get Phase II if you successfully completed Phase I and were invited or competitively selected to apply.

The deliverable is a working prototype and clear evidence that you can transition the technology to either a commercial product, a follow-on government program, or both. This is the phase where serious commercialization planning starts, including identifying a Phase III customer.

Phase III: Commercialization

Phase III is the unusual one. There is no SBIR/STTR money in Phase III. Instead, Phase III is a legal authority: any federal agency can issue a sole-source contract to an SBIR/STTR awardee for follow-on work that derives from or extends the Phase I/II effort, with no further competition. There is no dollar cap and no time cap.

For DOD especially, Phase III is the path to a real production contract. The companies that win big out of SBIR are the ones who use Phase I and Phase II to set up a Phase III sole-source procurement, often with a specific program office or service component as the named customer.

A clean Phase I → II → III progression at a single agency is the canonical SBIR success story, but it is also relatively rare. Most companies fund Phase I, run, learn, and pursue a different topic with a different agency next time.

Eligibility Rules That Disqualify Most Applicants

Federal eligibility is unforgiving. Every SBIR/STTR proposal you submit will be checked against the SBA's rules at the time of award, and a failed eligibility check is the fastest way to lose an award you have already "won."

You must be a for-profit U.S. small business. Headquartered and operating primarily in the United States. Nonprofits, universities, and government labs are not eligible. Sole proprietors generally need to incorporate first.

Fewer than 500 employees. Counted across all affiliates. If you have a parent company or sister entities, those headcounts roll up.

At least 51% U.S. ownership and control. Owned and controlled by individuals who are U.S. citizens or permanent residents, or by other small businesses that meet the same test. STTR has the same ownership test.

Venture-capital ownership rules are nuanced. A subset of agencies — including NIH and NSF — allow majority ownership by U.S. VC-operated entities, hedge funds, or private equity firms under specific conditions, but not all agencies do. DOD does not. If you have taken institutional capital, read the agency's specific eligibility guidance before you apply.

The PI rule. For SBIR, the Principal Investigator's primary employment (>50% of working time) must be with the small business at the time of award and throughout the project. For STTR, the PI can be employed primarily by either the small business or the research institution. "Primary employment" is checked against your time commitments to other employers, including university appointments.

You need active registrations. SAM.gov registration with a UEI, a Small Business Concern registration in the SBIR Company Registry, and agency-specific registrations (DSIP account for DOD, eRA Commons account for NIH, NSPIRES account for NASA). Plan on a couple of weeks of administrative setup before your first submission.

Before you spend any meaningful time on a proposal, run yourself through these checks. The most expensive way to learn an eligibility rule is to learn it three days before a deadline.

How to Actually Find SBIR and STTR Opportunities

1. Start at sbir.gov, but do not stop there

sbir.gov is SBA's cross-agency catalog. It contains the active SBIR/STTR topics across all 11 agencies and a searchable archive of historical solicitations and awards. The topic search at sbir.gov/topics is the closest thing to a single source of truth for what is currently open.

What sbir.gov is good for:

• Cross-agency browsing of currently open topics
• Looking up past awards (who won what, for how much)
• Reading the SBIR Policy Directive and SBA guidance
• Finding agency program office contacts

What sbir.gov is not good for:

• Submitting proposals — almost every agency routes you out to a specific portal (DSIP, eRA Commons, NSPIRES, Research.gov, PAMS, Grants.gov)
• Real-time alerts that match your actual technology focus
• Eligibility filtering at the company level
• Tracking topic amendments, Q&A releases, or pre-release period activity

Treat sbir.gov as the catalog. Treat the agency portals as the submission tools. Treat your own pipeline as the workflow.

2. Read every topic with two questions in mind

For each topic you open, ask:

Is the deliverable something my technology can plausibly produce in 6-12 months? Phase I is feasibility, not full-stack delivery. If the topic is asking for something three Phase II's away from your current state, it is the wrong topic.

Is there an obvious Phase III customer named anywhere? DOD topics almost always name a sponsoring program office, technology area, or component. NIH topics often map to a specific institute and disease area. If you cannot identify who would buy the production version of this technology from a Phase III sole-source contract, the topic may be funded for science, not for transition.

The second question is the one that separates Phase I shops from companies that build a real SBIR-funded business. The serious SBIR shops are not the ones who write the most polished Phase I; they are the ones who pick topics where Phase III procurement is plausible from day one.

3. Use forecasts and pre-release windows

Most DOD components release topics on a 30 to 60 day pre-release window before they go formally open. During pre-release you can talk to the topic author (TPOC) directly. Once a topic opens, those conversations are locked down and all questions go to a public Q&A.

The pre-release window is the highest-leverage time in the entire SBIR cycle. A 20-minute call with the TPOC during pre-release tells you more about how to write a winning proposal than 200 hours of Reddit threads. Track pre-release calendars by agency and component, and protect those windows on your calendar.

4. Watch the recurring vs episodic agencies

DOD runs three large BAAs a year (typically winter, spring, and summer), with components also running their own continuous "Open Topic" and component-specific releases. NIH runs three standard receipt dates per year. NSF SBIR has two cycles per year. NASA runs annually. DOE varies by office. USDA and EPA are usually annual.

Building a calendar of "when does each agency typically open" is one of the highest-ROI hour-long projects you will do as an SBIR-focused company. Once you have the cadence, you can pre-position partners, letters of support, and technical narratives ahead of the open window instead of scrambling in the last 30 days.

The Honest Limits of Searching SBIR/STTR Manually

sbir.gov was built as a publishing portal, not a discovery tool. After a few cycles, the same gaps show up:

• No company-level eligibility filtering. The site tells you the agency's eligibility rules. It does not check them against your specific SBA size standard, ownership structure, or VC profile.
• No relevance ranking. Every open topic that matches your keywords is shown equally. There is no signal for "this fits the technology you built three Phase I's around."
• Amendments are easy to miss. A topic can change scope, deadline, or evaluation criteria during the open period. The notification mechanism is, generously, minimal.
• Pre-release is invisible unless you go looking. Topics enter pre-release without much fanfare; you have to know to check.
• Each agency portal has its own login, registration, and submission flow. The cognitive cost of "what is open at DOD right now versus NIH right now versus NSF right now" is a real tax on small teams.
• DOD's DSIP is its own world. The topic catalog, submission system, evaluation status, and Q&A live in DSIP, and the UX assumes you already know the program inside out.

None of this is a reason to skip SBIR/STTR. It is a reason to stop treating "checking sbir.gov on Friday" as an opportunity discovery strategy.

How CLEATUS Helps With SBIR/STTR

We recently added sbir.gov as a first-class source inside CLEATUS, so every active SBIR/STTR topic across all 11 participating agencies — plus the full historical archive — is now indexed and matched against your company profile alongside the federal contract, grant, and state-and-local opportunities we already index.

In practice that means:

SBIR/STTR is a top-level source category. SBIR sits alongside Federal, State & Local, DIBBS, and Grants in the source toggle, so you can scope a search to SBIR opportunities specifically when you want to look at R&D pursuits in isolation, or include them in a broader pipeline view.

SBIR-specific fields are searchable. Phase (I / II / III), Topic Code, CMMC level, ITAR restriction, and EAR (export-controlled) flags are all extracted as filters and surfaced in a dedicated SBIR Program section on the contract detail card. If you cannot handle CMMC Level 2 yet, you can filter those topics out. If you are an EAR-controlled product company, you can filter for topics where that matters.

Eligibility-first matching. Auto Capture reads your SAM.gov registration, your SBA size standard, and your applicant-type eligibility, and only surfaces SBIR/STTR topics you can actually apply to.

AI analysis of the topic. GovCon Copilot reads SBIR topic descriptions the same way it reads RFPs and grant solicitations. Ask it "what is the technical objective," "summarize the eligibility section," "what is the agency really asking for," "who is the likely Phase III customer" and get a structured answer instead of re-reading the topic for the third time.

Drafting support. The AI Proposal Suite drafts technical volumes, work plans, and commercialization narratives using your prior proposals and uploaded company documents, structured to the agency's evaluation criteria.

One unified pipeline. SBIR topics live in the same pipeline as your federal contracts, grants, and state and local bids, with the same alerts, statuses, and workflow. You do not have to maintain a separate SBIR spreadsheet to know what is happening across all of your pursuits.

With this source live, CLEATUS now operates 74 active sources across federal, state and local, DIBBS, grants, and SBIR/STTR — and more SBIR/STTR-adjacent sources (NASA-specific, NIH-specific, agency forecasts) are next in the queue.

When SBIR/STTR Is and Is Not the Right Move

SBIR/STTR is not free money, and it is not the right funding source for every company. A short honest framework:

SBIR/STTR is a strong fit when your company has a deep-tech product where the underlying technology is still maturing, you have meaningful in-house technical talent (or a research partner you trust for STTR), the federal government is a plausible end customer for your production product, and you are willing to invest the time to learn one agency well rather than chasing every open topic.

SBIR/STTR is a weak fit when your product is a pure commercial play with no real federal mission tie-in, you cannot dedicate a senior technical person to the project at the time commitment SBA requires, your only goal is the Phase I check (~$250K with no follow-on plan), or you have already taken capital from foreign investors in a way that disqualifies you under the ownership rules.

The most successful SBIR companies treat the program as a way to fund the de-risking of technology they were going to build anyway, not as a way to fund a company they would not otherwise have started.

Frequently Asked Questions

What is the difference between SBIR and STTR?

Who is eligible for SBIR or STTR awards?

How much money can I win in SBIR Phase I and Phase II?

Where do I submit an SBIR or STTR proposal?

How long does SBIR/STTR registration take?

Are SBIR/STTR awards grants or contracts?

Is SBIR/STTR funding non-dilutive?

What is the best way to find SBIR/STTR opportunities?

Final Take

SBIR and STTR are the most underused federal funding programs in the small business toolkit. The dollars are real, the process is learnable, and the non-dilutive nature of the awards makes them uniquely valuable for deep-tech companies that would otherwise have to trade equity for runway.

The catch is that the topics are scattered across a dozen portals, the eligibility rules are unforgiving, and the win condition is not "write a great Phase I" — it is "pick the right topic, build the right Phase III thesis, and treat the program as a multi-year strategy at a specific agency."

Use sbir.gov as the catalog. Use the agency portals for submission. Use a single pipeline tool so SBIR pursuits live next to your other federal opportunities, not in a parallel universe.

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Further Reading

• How to Find Federal Grants on Grants.gov: A 2026 Guide
• How to Find Your SAM.gov UEI
• How to Register My Company on SAM.gov
• DIBBS Explained: How to Find and Win DLA Contracts Through the Defense Logistics Agency's Bid Board
• Agentic AI for GovCon Capture Management in 2026
• GovCon Procurement Forecasting and Recompete Intelligence in 2026

Customer Stories

• How D2 Government Solutions Tripled Growth Without Adding Staff
• How Operation Hired Achieved 6× Proposal Output with CLEATUS AI
• How MST Maritime Quadrupled Proposal Output with CLEATUS AI
• How a Veteran-Owned Shop Won Their First Contract with CLEATUS AI

About CLEATUS

CLEATUS is an AI-powered government funding platform that helps small businesses find opportunities, analyze requirements, track competitors, and win more federal contracts, grants, and SBIR/STTR awards at a fraction of traditional capture costs. We aggregate federal contracts, federal grants, SBIR/STTR topics, and state and local opportunities into a single pipeline. Our GovCon Copilot analyzes solicitations and your internal documents to surface the funding you can actually win.