NIH R21 Exploratory/Developmental Research Grant
A shorter NIH grant for exploratory, high-risk/high-reward work that doesn't yet have extensive preliminary data.
Official program page- Sponsor
- National Institutes of Health
- Mechanism
- R21
- Typical award
- Up to 2 years, with combined direct costs normally capped at $275K and no more than $200K in any single year.
- Deadlines
- Three standard cycles a year: generally Feb 16, Jun 16, and Oct 16 for new applications.
What it funds
- Early-stage or exploratory research
- Pilot and feasibility studies
- New methods, models, or technology development
Who can apply
Independent investigators at eligible institutions. Preliminary data are not required and, for many institutes, not expected.
Best for
Testing a novel idea or generating the preliminary data that could support a later R01.
Figures and deadlines change year to year: always confirm current details on the official program page before applying.
Deadlines
NIH uses three standard cycles a year. Applications are due by 5:00 PM local time of the applicant organization, and NIH no longer has separate AIDS-related due dates.
| Application type | Cycle 1 | Cycle 2 | Cycle 3 |
|---|---|---|---|
| New | February 16 | June 16 | October 16 |
| Renewal, resubmission, revision | March 16 | July 16 | November 16 |
Some funding opportunities set their own dates. Always check the specific notice of funding opportunity.
Budget limits
- Up to two years of support.
- Combined direct costs for both years normally may not exceed $275,000.
- No more than $200,000 in direct costs in any single year.
- Because yearly requests stay under $250,000, most domestic R21 applications use a modular budget. F&A is added on top of the direct cost limits.
R21 vs. R01
| R21 | R01 | |
|---|---|---|
| Purpose | Exploratory or developmental, early-stage ideas | A discrete, mature research project |
| Length | Up to 2 years | Typically 3 to 5 years |
| Budget | Up to $275,000 direct over 2 years, $200,000 max in a year | Not capped by activity code; over $500,000 a year needs prior agreement |
| Preliminary data | Not required | Usually expected |
| Renewable | No | Yes |
| New application due dates | Feb 16, Jun 16, Oct 16 | Feb 5, Jun 5, Oct 5 |
The parent R21
Investigator-initiated R21 applications go through NIH's parent R21 announcement, but not every institute accepts them. Check the participating institutes in the parent announcement, or apply through an institute-specific R21 opportunity.
Frequently asked questions
When are NIH R21 deadlines?
New R21 applications are due February 16, June 16, and October 16. Renewal, resubmission, and revision applications are due March 16, July 16, and November 16, by 5:00 PM local time.
How much funding can you request on an R21?
Up to $275,000 in direct costs over two years, with no more than $200,000 in any single year. F&A is paid on top.
Can an R21 be renewed?
No. R21 awards are not renewable. Investigators typically use R21 results to support a later R01 application.
Does an R21 need preliminary data?
No. Preliminary data are not required, and many institutes do not expect them for R21 applications.
Does every NIH institute accept the parent R21?
No. Check the list of participating institutes in the parent R21 announcement before applying.
Related programs
All NIH opportunitiesNIH's flagship, investigator-initiated grant for a discrete, mature research project.
A small, short-term NIH grant for discrete, well-defined projects that can be completed with limited resources.
NIH's small-business programs funding the development and commercialization of biomedical technologies.
Managing a NIH R21 proposal?
GrantsManager tracks the deadline, budget, and submission from first draft to award.