For students deciding whether to apply
NSF GRFP Eligibility Checker for Your Topic
A plain verdict on your research idea under NSF's GRFP eligibility rules, each rule quoted word for word, plus the field that fits best.
Free to start. No card needed.
How to check NSF GRFP eligibility yourself
Judge your stage as of the deadline day, not today. You must be a U.S. citizen, national or permanent resident by then. Seniors and bachelor's graduates who have never enrolled in a graduate degree program can apply once a year until they do. Once you enroll, you get one try, in the first year of your first graduate program, and joint bachelor's-master's students also get one. Second-year graduate students and anyone who holds a master's degree can't apply. NSF's Applicant Eligibility page1 spells this out and has a four-question questionnaire.
NSF supports only research-based master's and doctoral programs in STEM that include a thesis. Professional and clinical programs are out, including law, medicine, public health, social work, clinical or counseling psychology and joint degrees like MD/PhD. Then find a Major Field of Study and subfield in the solicitation's appendix2 that match your plan, because unlisted subfields aren't eligible. This cycle's list has none for education, political science or public policy. Pick by your research and degree program, not your department's name: NSF returns applications without review when the field doesn't match both.
Last, test what your research is for. For the 2026 competition, NSF says it screened the Graduate Research Plan, not the personal statement3, to judge whether proposed research was eligible. So find the sentence in your plan that says why the work matters. Is its end point new knowledge, or a diagnosis or treatment, a policy change, higher crop yields or a management plan? Those last four match NSF's four research exclusions, and NSF says not every ineligible area can be listed. When in doubt, ask a faculty member, as NSF advises.
How it works
Is my research idea eligible for the NSF GRFP?
Start with a few sentences about the research you want to do, or drop in a research plan or personal statement as a PDF or Word file. River checks it against NSF 26-526, the 2026–27 solicitation, covering your stage, degree program, area of study and the four research exclusions. Each rule is quoted in NSF's own words and marked Clear, Check or Not eligible, with one line on why. Then River names the Major Field of Study and two subfields from NSF's list that fit your idea best.
An ineligible application never reaches a reviewer: NSF says each year "hundreds of applications are determined to be ineligible" and returned without review3. Where your words trip a rule, River quotes them and suggests an honest reframe toward the fundamental question inside your idea, or says plainly when no rewording fixes it. Facts it can't see, like citizenship, go on a list for you to confirm. If your idea comes back clear, the research proposal writer drafts your two-page plan from it.
The 2026–27 cycle has closed: applications were due October 19 to 23, 2026, and NSF expects to notify applicants by early April 2027. If you applied, you can withdraw until November 154 without it counting toward the times you've applied. The check applies this cycle's rules to the stage you tap, so if you're planning for next year, tap the stage you'll be in then. Under these rules, a first-year graduate student today can't apply next year. When NSF posts its next solicitation, compare your result with its rules.
How it works
From research idea to eligibility check
Paste your idea
Paste a few sentences about your research or drop a draft, then tap where you are now if you like.
River checks each rule
It reads your words against NSF 26-526: your stage, degree program, area of study and four research exclusions.
Get your verdict
A one-line verdict opens your doc, followed by each rule quoted with its status and your best-fit field.
Reframe or draft
Read the honest reframe for any flagged point, compare two fields, or start your two-page research plan.
Check these points first
Example · senior · how coral microbes handle marine heat
- Applicant stage
- Clear. Seniors "can apply unlimited times before enrolling in a graduate degree program."
- Conservation practice
- Check. "so reef restoration projects can pick heat-tolerant corals" reads as restoration, which NSF excludes.
- Best-fit field
- Life Sciences · Microbial Biology, Ecology
- Deadline
- October 19, 2026, now passed. See NSF's program page for the next one.
- Confirm yourself
- Citizenship, national or permanent resident status by the deadline
What you'll get
Your research idea checked against NSF's 2026–27 eligibility rules
- A one-line verdict, then each NSF rule quoted with Clear, Check or Not eligible
- Your best-fit Major Field of Study and two subfields, from NSF's own list
- Honest ways to reframe a risky idea, and the facts only you can confirm
Before and after
Your idea in. A rule-by-rule check back.
I'm a senior in marine biology. I want to find which microbes help corals survive marine heatwaves, so reef restoration projects can pick heat-tolerant corals to plant. I spent two summers sampling reefs in the Florida Keys.
Check these points first Applicant stage · Clear. You say you are a senior. Degree program · Check. You don't name the graduate program you plan to enter. Conservation practice · Check. "so reef restoration projects can pick heat-tolerant corals" makes restoration the goal. Best fit: Life Sciences · Microbial Biology, Ecology. This cycle's deadline, October 19, 2026, has passed. Reframe: lead with how coral microbes change a coral's heat tolerance, and drop restoration as the goal.
River checks your words against NSF's published rules. It is not an official answer, and NSF makes the final call.
What lands in your doc
What's in your eligibility check
- A one-line verdict on top: Looks eligible, Check these points first, or Not eligible as written
- Seven checks, from your stage to the four research exclusions, each with NSF's rule quoted word for word
- Clear, Check or Not eligible beside each rule, quoting your own words wherever they trip it
- Your best-fit field with two subfields from NSF's list, and why the first field you pick matters
- Honest reframes for any flagged point, or a plain note when no rewording can fix it
- Facts River can't see, like citizenship or enrollment dates, listed for you to confirm
Questions GRFP applicants ask
Common questions
Can second-year graduate students apply to the GRFP?
No. The 2026–27 solicitation, NSF 26-5262, says "Second-year graduate students are not eligible to apply." Graduate students may apply only once, during the first year of their first graduate program. Your registrar's transcript sets how far along you are: summer research credits in your program count, but graduate courses taken outside a degree program don't.
What research is not eligible for the GRFP?
NSF 26-5262 excludes four areas of research: goals directly about human disease or health, applied crop production or food safety, policy advocacy, and conservation practice or natural resource management. Narrow exceptions cover some bioengineering under Engineering, biomaterials work that furthers fundamental materials research, and health-related goals that advance fundamental knowledge in engineering, math, physical, computer or information sciences. The GRFP eligibility guide quotes all four in full.
How do I choose my GRFP field of study?
Choose the Major Field of Study that best matches your research plan and the graduate program you'll enter. Under NSF 26-5262, the first field you select sets your deadline, the experts who review you and the discipline you must enroll in if you accept. Any other fields you list are for NSF's information only. If two fit, ask a faculty member which panel suits your work.
When can I apply for the NSF GRFP next?
In NSF's next competition, if you qualify by its deadline. Its dates and any rule changes will come in a new solicitation. This cycle's solicitation, NSF 26-5262, appeared on August 25, 2026, less than two months before letters were due, so start early. Under current rules, a senior today can apply next year, but a first-year graduate student can't. Count back from the new dates with the GRFP checklist.
Is River's check an official eligibility decision?
No. River compares your words with the rules NSF publishes, and NSF makes every eligibility decision. Even NSF's own questionnaire is "not an official determination of an individual's eligibility," its Applicant Eligibility page1 says. For a question about your own case, contact NSF through its GRFP contact page5, and ask a faculty member or advisor, as the solicitation recommends.
How do I check my NSF GRFP eligibility with River?
Paste a few sentences about your research into the box at the top of this page, or drop in your research plan. Tap your stage too, if you like. River checks it against NSF 26-526 and writes the verdict, each rule with its status, and your best-fit field into your free River workspace. River's privacy policy says it doesn't use your documents to train AI models.
Is the NSF GRFP eligibility checker free?
Yes, it is free to start. Your eligibility check opens in a River workspace, where you can edit it, share it or ask River to compare two fields for your idea. Paid plans add more AI use and access to the most advanced models.
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