NIH Activity Codes
Every NIH Activity Code with Live Funding Data
Browse all major NIH activity codes — R01, R03, R21, R35, K01, K08, K23, K99/R00, F30, F31, F32, T32, P01, U01, DP1, DP2, DP5 and more — with funding amounts, eligibility, and live recent awards from NIH RePORTER.
R Series — Research Grants
Discrete, specified investigator-led research project
Funding: No fixed cap; most awards $250K–$500K direct/year
Duration: 3–5 years (renewable)
Small, short-term projects (pilot studies, secondary analyses, methods development)
Funding: Up to $50,000 direct costs per year
Duration: Up to 2 years
Strengthen research at undergraduate-focused institutions
Funding: Up to $300,000 direct costs over the project
Duration: Up to 3 years
Novel, high-risk/high-reward exploratory research
Funding: Up to $275,000 direct costs over 2 years (combined)
Duration: Up to 2 years
Planning for clinical trials or large-scale studies
Funding: Up to $450,000 direct costs over the project
Duration: Up to 3 years
Long, flexible support for productive investigators (one program per lab)
Funding: Varies by IC, typically $600K–$1.5M direct/year
Duration: 5–8 years
R01 with extended funding for top-scoring established investigators
Funding: Same as R01
Duration: Up to 7 years
K Series — Career Development
Career development for new investigators needing mentored training
Funding: Salary up to ~$100K + research support (varies by IC)
Duration: 3–5 years
Mentored research training for clinician-scientists doing lab/translational research
Funding: Salary support + ~$30K research/year
Duration: 3–5 years
Mentored training for clinicians doing patient-oriented research
Funding: Salary support + ~$30K research/year
Duration: 3–5 years
Postdoc → faculty transition (mentored K99 then independent R00)
Funding: K99: ~$90K–$130K/yr · R00: ~$249K/yr
Duration: K99: 1–2 years · R00: up to 3 years
Protected time for established clinician-scientists to mentor
Funding: Salary support + research support
Duration: 3–5 years
Brings quantitative scientists (engineers, physicists) into biomedical research
Funding: Salary support + research support
Duration: 3–5 years
F Series — Individual Fellowships
Combined MD/PhD or other dual-degree predoctoral training
Funding: Stipend + tuition + research allowance
Duration: Up to 6 years
PhD predoctoral research training
Funding: NRSA stipend + tuition + research allowance
Duration: Up to 5 years
Postdoctoral mentored research training
Funding: NRSA postdoctoral stipend + research allowance
Duration: Up to 3 years
Mid-career retraining for established investigators
Funding: Stipend + research allowance
Duration: Up to 2 years
T Series — Institutional Training
Institution-administered predoc/postdoc training program
Funding: NRSA stipends + tuition for trainees
Duration: 5 years (renewable)
Short-term research experiences (8–12 weeks) for health-professional students
Funding: Short-term stipends
Duration: 5 years (institutional grant)
P Series — Programs & Centers
Multi-project, multi-PI program with shared theme and core resources
Funding: Multi-million per year (varies by IC)
Duration: 5 years
Shared resource cores supporting NIH-funded investigators
Funding: Varies (typically $1M–$5M/year)
Duration: 5 years
Topic-specific multi-component research center (e.g., SPORE)
Funding: Multi-million per year
Duration: 5 years
U Series — Cooperative Agreements
Investigator-led research with NIH staff substantial involvement
Funding: R01-like; varies
Duration: 3–5 years
Multi-component centers with NIH program involvement
Funding: Multi-million per year
Duration: 5 years
Large multi-component research with NIH involvement
Funding: Multi-million per year
Duration: 5 years
DP Series — NIH Director's Awards
High-risk/high-reward research from exceptional individual scientists
Funding: $700,000 direct/year
Duration: 5 years
Bold, untested ideas from early-stage investigators
Funding: $1.5M direct over project
Duration: 5 years
Skip the postdoc — direct PhD-to-PI transition
Funding: $250K direct/year
Duration: 5 years
Need help choosing a grant?
The activity codes guide walks through how to choose between R01, R21, K, F, T, P, and U mechanisms based on career stage and project maturity. The NIH grants overview covers funding amounts, success rates, and the application process.