NIH SBIR/STTR Fast-Track (R43/R44): eligibility, deadline, and how to apply (2026)
Key Facts
- Agency
- National Institutes of Health (NIH)
- Award Range
- $150,000 - $1,600,000
- Deadline
- September 5, January 5, April 5 (Annual Cycles)
- CFDA Number
- 93.856
The NIH SBIR/STTR Fast-Track (R43/R44) is a federal funding opportunity administered by National Institutes of Health (NIH). This guide covers everything you need to know to determine whether you qualify and how to submit a competitive application before the September 5, January 5, April 5 (Annual Cycles) deadline.
Use our free Grant Finder to discover additional programs you may be eligible for based on your organization type and location.
Eligibility requirements
To qualify for the NIH SBIR/STTR Fast-Track (R43/R44), applicants must meet the following criteria:
US-based for-profit small businesses with 500 or fewer employees. Fast-Track combines Phase I and Phase II into a single application. Principal investigator must be primarily employed by the applicant small business.
Eligibility requirements can change between funding cycles. Always verify the current criteria on the official Grants.gov listing before beginning your application.
If you are not sure whether your organization qualifies, review our guide on best small business grants for alternative programs that may be a better fit.
How to apply: step by step
- Register on SAM.gov. Every federal grant applicant needs an active SAM (System for Award Management) registration. Allow 2-4 weeks for new registrations to process. Existing registrations must be renewed annually.
- Get a UEI number. Your Unique Entity Identifier is assigned through SAM.gov and replaces the old DUNS number. You will need this on every federal application.
- Review the Notice of Funding Opportunity (NOFO). Download the full NOFO from Grants.gov. Pay close attention to review criteria, budget limits, and required attachments.
- Prepare your application package. Most federal grants require a project narrative, budget justification, organizational capacity statement, and supporting documents. Follow the page limits and formatting rules exactly.
- Submit through Grants.gov. Create a workspace, upload all required forms and attachments, and submit before the September 5, January 5, April 5 (Annual Cycles) deadline. The system timestamps your submission, and late applications are automatically rejected.
- Confirm receipt. You will receive a tracking number and confirmation email. Check back in 1-2 business days to verify your application passed the Grants.gov validation checks.
For detailed guidance on writing a winning narrative, see our grant writing tips article.
Grant details
| Detail | Information |
|---|---|
| Grant Name | NIH SBIR/STTR Fast-Track (R43/R44) |
| Funding Agency | National Institutes of Health (NIH) |
| CFDA Number | 93.856 |
| Award Minimum | $150,000 |
| Award Maximum | $1,600,000 |
| Deadline | September 5, January 5, April 5 (Annual Cycles) |
| Category | Research |
| Matching Required | No matching funds required |
| Application Link | Apply on Grants.gov |
Federal grant budgets and priorities shift each fiscal year. The amounts listed above reflect the most recent funding cycle. For the latest figures, check the official program page.
If you are exploring business financing beyond grants, the team at CeoCult covers loans, lines of credit, and alternative funding for founders.
We track new federal funding weekly. Get alerts when new Research grants open.
Frequently asked questions
Who is eligible for the NIH SBIR/STTR Fast-Track (R43/R44)?
US-based for-profit small businesses with 500 or fewer employees. Fast-Track combines Phase I and Phase II into a single application. Principal investigator must be primarily employed by the applicant small business.. Requirements can change between cycles, so always verify on the official Grants.gov listing before applying.
What is the deadline for NIH SBIR/STTR Fast-Track (R43/R44)?
The current deadline is September 5, January 5, April 5 (Annual Cycles). Many federal grants operate on annual or rolling cycles. If this deadline has passed, check Grants.gov for the next funding opportunity.
Does NIH SBIR/STTR Fast-Track (R43/R44) require matching funds?
No matching funds required. Matching requirements can vary by fiscal year and applicant type, so confirm with the funding agency before committing resources.