When Should a University Spinout Choose an NSF STTR Instead of an NSF SBIR? Understanding the Principal Investigator Employment Rules
Last updated: July 2026 · BW&CO Consulting — non-dilutive federal funding for deep-tech founders
Launching a company around university-developed technology is exciting, but it also creates one of the most common eligibility questions we hear from founders pursuing NSF funding:
"Our Principal Investigator still works at the university. Can we apply for an NSF SBIR?"
The answer is: sometimes—but often an NSF STTR is the better fit.
Many faculty founders, postdoctoral researchers, and university scientists assume they must immediately leave their university position to pursue NSF funding. Others incorrectly assume that simply being a founder qualifies them to serve as the Principal Investigator (PI) on an SBIR proposal.
Neither assumption is necessarily correct.
Understanding the differences between NSF SBIR and NSF STTR—particularly the PI employment requirements—can save months of planning, prevent eligibility issues, and allow a startup to pursue funding without forcing major employment decisions too early.
Why PI Employment Matters
Although NSF SBIR and NSF STTR are closely related programs, they were created to solve slightly different commercialization challenges.
SBIR is designed for research primarily conducted within the small business.
STTR was specifically created to encourage commercialization of technologies emerging from research institutions.
That distinction shows up most clearly in the rules governing the Principal Investigator.
NSF SBIR: The PI Must Primarily Work for the Company
For NSF SBIR awards, the Principal Investigator must be primarily employed by the small business.
In practical terms, that means the PI's principal professional commitment must be to the startup during the award period—not to a university, national laboratory, or another employer.
This requirement often surprises faculty founders.
Owning equity in a startup is not enough.
Serving as CEO is not enough.
Even being the inventor of the technology is not enough.
If the PI's primary employment remains with the university, the company generally cannot use that individual as the PI for an NSF SBIR award.
The Challenge for University Spinouts
This becomes particularly difficult during the earliest stages of commercialization.
Many founders are still:
Tenure-track faculty
Research professors
Postdoctoral researchers
Staff scientists
Research engineers
Clinical investigators
They may be spending nearly all of their working hours at the university while simultaneously building a startup around licensed intellectual property.
From a commercialization perspective, this is perfectly normal.
From an SBIR eligibility standpoint, however, it can create complications.
NSF STTR Was Built for Exactly This Situation
The NSF STTR program recognizes that commercialization often begins before the inventor is ready to leave academia.
Unlike SBIR, the STTR program allows the Principal Investigator to be primarily employed by either:
the small business or
the partnering nonprofit research institution.
This flexibility removes one of the biggest barriers facing university spinouts.
A faculty member can continue fulfilling university responsibilities while leading the technical direction of the startup's STTR project.
For many early-stage companies, this provides a much smoother transition from laboratory research to commercial development.
Why This Matters for Faculty Founders
Imagine a professor who has developed a breakthrough medical device.
The university licenses the technology into a newly formed startup.
The professor wants to remain on faculty while the company validates the technology.
Under an NSF SBIR, that employment arrangement may prevent the professor from serving as PI.
Under an NSF STTR, however, the professor may be able to remain at the university while leading the project, provided all NSF eligibility requirements are satisfied.
That difference alone makes STTR the better option for many university spinouts.
STTR Requires a University Partnership
Of course, this flexibility comes with tradeoffs.
Unlike SBIR, STTR requires a formal collaboration with a nonprofit research institution.
That institution may be:
a university
a nonprofit research institute
a federally funded research and development center (where eligible)
The relationship is not informal.
It requires documented cooperation between the startup and the research institution, including agreements governing intellectual property and the conduct of the research.
Research Responsibilities Are Shared
Another major distinction is how the work must be divided.
Under NSF STTR:
the small business must perform at least 40% of the research effort
the partnering research institution must perform at least 30%
This structure reflects the collaborative nature of the STTR program.
Rather than outsourcing university work under a standard subcontract, STTR treats both organizations as active research partners.
Common Misconceptions
"I'm the founder, so I can automatically be the PI."
Not necessarily.
Founder status and PI eligibility are two separate issues.
Employment requirements still apply.
"I'll just keep my university job while running an SBIR."
That may create eligibility problems if your primary employment remains with the university during the award.
"We should always choose SBIR."
Not always.
Many university spinouts are actually stronger STTR candidates during their earliest stages.
"Once we're a company, we no longer need the university."
In many cases, the university remains critical because it provides:
laboratory facilities
specialized equipment
graduate student support
ongoing technical expertise
access to the original inventors
STTR is specifically designed to leverage those strengths.
Practical Paths Companies Can Consider
Every spinout is different, but several common approaches emerge.
Option 1: Apply Through NSF STTR
This is often the cleanest solution when:
the inventor remains employed by the university
significant research will continue on campus
the company is just beginning commercialization
Advantages
PI can remain at the university.
Strong alignment with university-developed IP.
Preserves research continuity.
Considerations
Requires a formal university partnership.
Must meet STTR work allocation requirements.
Additional coordination with the university's technology transfer office is often necessary.
Option 2: Transition the PI to the Startup
Some founders decide to leave the university—or significantly change their employment status—before the award begins.
This can position the company for an NSF SBIR application.
Advantages
Greater flexibility in project management.
No mandatory university research allocation.
Considerations
Major career decision.
May affect university responsibilities, benefits, or tenure progression.
Timing must align with NSF requirements.
Option 3: Appoint a Different PI
Some companies designate another qualified individual whose primary employment is already with the startup.
The faculty founder continues contributing as a senior technical advisor or key personnel.
Advantages
Preserves SBIR eligibility.
Founder remains scientifically involved.
Considerations
The designated PI must genuinely lead the technical project.
Titles alone are insufficient if they do not reflect actual project leadership.
Option 4: Start with STTR, Then Pursue SBIR Later
Some companies begin with an STTR while the technology is still closely tied to the university.
As the company matures, hires staff, and builds its own research capabilities, future projects may fit more naturally under SBIR.
For many university spinouts, this progression mirrors the company's evolution from academic research to independent commercialization.
Questions Every University Spinout Should Ask
Before deciding between NSF SBIR and NSF STTR, founders should consider:
Where is the PI's primary employment today?
Will that employment change before the award begins?
How much research still depends on university facilities?
Is the university expected to remain a major research partner?
Would changing the PI strengthen the application?
Does STTR better reflect how the project will actually be performed?
These questions are often more important than the technology itself when determining program eligibility.
The Bottom Line
For university spinouts, the decision between NSF SBIR and NSF STTR is rarely just about funding—it is about organizational readiness.
If the Principal Investigator is still primarily employed by the university, the startup should carefully evaluate whether an NSF STTR is the more appropriate path. The program was created specifically to bridge the gap between academic discovery and commercial innovation, allowing university researchers and startups to collaborate while new companies establish themselves.
Choosing the right mechanism early can reduce eligibility risks, simplify project planning, and position the company for long-term success as it transitions from the laboratory to the marketplace.
Need Help Determining Whether SBIR or STTR Is the Better Fit?
At BW&CO, we regularly work with faculty founders, university spinouts, and first-time entrepreneurs navigating the complexities of NSF funding. From evaluating PI eligibility and selecting the right funding mechanism to coordinating with technology transfer offices and developing competitive proposals, our team helps companies build a commercialization strategy that aligns with NSF requirements from day one.
Schedule a free consultation to discuss your technology and determine whether NSF SBIR or NSF STTR is the strongest path for your company.