NIH SBIR/STTR Eligibility Requirements: Ownership, PD/PI, and Work-Split Rules

Quick Answer

NIH SBIR and STTR eligibility rests on four facts about your company: who owns it, where your PD/PI is employed, how the work is split between your business and any partners, and where the R&D physically happens. These are certified on the SBIR/STTR Information Form, but they are not something that form can fix if you get them wrong. Confirm all four before you write a single page of your application, because an eligibility problem discovered late is not a formatting fix, it is a disqualifying one.

Ownership: Who Can Own Your Company

To qualify, your business must be a for-profit U.S. small business, majority-owned by U.S. citizens or permanent residents. That said, majority ownership by venture capital firms, hedge funds, or private equity is allowed for SBIR under some NOFOs. It just comes with a catch: it triggers an additional VCOC certification that must be attached to your application. If any part of your cap table involves institutional investors, confirm your ownership structure against your specific NOFO before you assume you qualify, and be ready to include that certification if it applies to you.

PD/PI Primary Employment

Your Program Director or Principal Investigator's employment status is one of the most commonly misunderstood eligibility rules, and it differs by program.

For SBIR, your PD/PI must be primarily employed by the small business, meaning more than half time, at the time of award. This gets certified directly as question 10 on the Information Form. It is easy to overlook if your PD/PI splits time with a university lab or another employer, so confirm this early rather than assuming it will sort itself out by award time.

For STTR, the rule is more flexible. Your PD/PI may be employed by either the small business or the partner research institution. This flexibility exists because STTR is structured around a formal partnership with a nonprofit research institution in the first place.

Work-Split Requirements

SBIR and STTR divide required work differently between your company and any partners, and mixing up the two program's rules is a common and entirely avoidable mistake.

SBIR requires the small business to perform at least two-thirds of the work in Phase I and at least half in Phase II. STTR requires at least 40 percent of the work performed by the small business and at least 30 percent by the research-institution partner. These percentages are not a suggestion. They define whether your project structure is even eligible for the program you are applying under.

U.S. Performance

All R&D is normally expected to be performed in the United States. If any part of your project requires an exception, that exception must be explained in a written attachment rather than assumed or left unaddressed. This is one of the certifications on the Information Form, so if any portion of your work happens outside the U.S., plan for that explanation before you submit rather than after a reviewer flags it.

Why These Facts Come Before the Writing

Every one of these eligibility points is a fact about your business, not a matter of how the application is written or formatted. A strong Research Strategy and Commercialization Plan cannot compensate for a company that does not actually meet the ownership, employment, work-split, or performance-location requirements of the program it applied under. Confirm eligibility first, ideally before you invest time drafting anything, and treat these four facts as the gate your project needs to clear before the writing begins.

FAQ

Can a venture-backed company apply for NIH SBIR funding? Yes, under some NOFOs. Majority ownership by VCs, hedge funds, or private equity is permitted for SBIR, but it requires an additional VCOC certification attached to your application. Confirm this against your specific NOFO, since not all of them allow it in the same way.

Does my PD/PI need to work for my company full time? For SBIR, your PD/PI must be primarily employed by the small business, meaning more than half time, at the time of award. For STTR, the PD/PI may instead be employed by the partner research institution, since STTR is built around that formal partnership.

What is the difference between SBIR and STTR work-split requirements? SBIR requires your small business to perform at least two-thirds of the work in Phase I and at least half in Phase II. STTR requires at least 40 percent by the small business and at least 30 percent by the research-institution partner.

Can any part of our SBIR project be performed outside the United States? All R&D is normally expected to be performed in the U.S. Any exception must be explained in a written attachment as part of your application rather than left unaddressed.

Where are these eligibility facts actually certified? On the SBIR/STTR Information Form. But these are facts about your company that should be confirmed before you begin writing, not questions to work out while filling in the form itself.