What this program funds
The K99/R00 is NIH's premier postdoc-to-faculty transition award, in two phases: a mentored K99 phase (up to two years) that finishes your training while you go on the faculty job market, then an independent R00 phase (up to three years) that travels with you to your new faculty position and funds the launch of your lab. Its whole logic is leverage on the job market — search committees know an incoming R00 pays for itself.
Eligibility in plain English
- You are a postdoctoral researcher with limited time since starting postdoctoral training — as of recent policy, no more than four years of postdoctoral research experience at application (including resubmission). The clock and its exceptions (clinical training, parental leave) are precise, so verify your own dates early.
- Unusually for NIH career awards, there is no citizenship requirement: the K99/R00 is open to non-U.S.-citizens, which makes it the main NIH career mechanism available to international postdocs.
- You cannot already hold an independent faculty position, and the R00 phase activates only when you secure one and the institute approves the transition — it is not automatic.
- Confirm specifics with your sponsored-programs office and the current funding opportunity announcement.
What you'll need to submit
- Specific Aims (1 page) spanning both phases.
- The combined candidate and research sections (12 pages total): Candidate's Background; Career Goals and Objectives; Career Development / Training Activities; and Research Strategy — with a visible seam between the mentored K99 work and the independent R00 work.
- Mentor's statement (and co-mentor/advisory statements) describing the mentoring and transition plan.
- Institutional environment and commitment documentation.
- Reference letters (typically 3–5), submitted separately by referees before the deadline — brief your letter writers early.
- Biographical Sketches (via SciENcv), budget, Data Management and Sharing Plan, and human-subjects/vertebrate-animals materials as applicable.
Tips for this mechanism
- Count backwards from your eligibility window. You want time for one resubmission before the postdoc-experience clock runs out, so the right time to start writing is earlier than feels natural — often your second postdoc year.
- The application is judged on trajectory, not just science. Reviewers ask: what does this person still need to learn, and will the R00 project be theirs rather than a slice of the mentor's program? Draw that independence line explicitly.
- Negotiate your faculty offer knowing the R00 comes with you. Startup packages should supplement, not substitute for, the R00 — and the receiving institution must support the activation paperwork.
Related programs
- NIH K01, K08, K23 (mentored career awards for those staying longer in a mentored phase — note these require citizenship or permanent residency)
- NIH F32 (postdoctoral fellowship earlier in training)
- NIH DP2 New Innovator and R01 with ESI status (once independent)