NIH application guidance

Reviewed 2026-10-01. Start from a specific active NOFO, its amendments, related NIH Guide notices, due date, activity code, and application form package. Since October 2025, Grants.gov is the official source of NIH funding opportunities; the NIH Guide continues to carry policy notices. An old Guide NOFO or a RePORTER award is not proof of current availability or eligibility.

Appropriate assistance and applicant ownership

NIH policy permits limited AI assistance but will not consider applications, or sections, substantially developed by AI to be applicants' original ideas. Use this skill to extract requirements, critique investigator-authored material, check consistency and calculations, and suggest limited edits. Keep the scientific ideas, interpretation, and substantive application development with the applicant; human review alone does not erase the policy. Never invent preliminary findings, citations, collaborators, patient access, credentials, or commitments. The same policy section limits an individual PD/PI or MPI to six covered applications per council calendar year, with specified activity-code exclusions; verify how the limit applies before planning multiple submissions.

Review framework

For most research project grants with due dates on/after January 25, 2025, use the simplified review framework:

All three affect overall impact. This is not a weighted average. Additional review criteria, including applicable human-subject and animal protections, may affect impact despite lacking standalone scores; budget appropriateness is a different review consideration. Check Section V of the NOFO: fellowships, K awards, small business, and complex multi-project mechanisms need their own review instructions. The research narrative still uses Significance, Innovation, and Approach where the application instructions require them; do not rename these to the review factors.

NOT-OD-26-114 continues modified practices for the January 2027 Advisory Council: most meetings discuss 30-35% of applications; a middle category is competitive but not discussed. Such applications can still be considered for funding. Summary statements are simplified. Do not promise that half will be discussed or classify an application as unfundable solely because it was not discussed. Overall impact scores for discussed applications normally run 10-90; do not map a score to an agency-wide funding chance.

Narrative and attachments

Use the current page-limit table and the NOFO. For standard R01 applications, Specific Aims is up to one page and Research Strategy up to 12; for standard R03/R21 the strategy is generally six. The Project Summary/Abstract is generally at most 30 lines, and Project Narrative at most three sentences. These are maxima, not required exact lengths or interchangeable components. Check exceptions rather than shrinking type to fit.

An aims page should connect the gap, objective, investigator's hypothesis or research question, achievable aims, expected knowledge, and impact. Two or three aims may work well, but NIH has no universal required number. Avoid making all later aims depend on one uncertain result; state alternatives. See specific_aims_guide.md for illustrative writing patterns, not a ready-to-submit application.

For the research strategy:

1. Significance: identify the important barrier and what resolving it changes. Cite the strengths and limitations of prior evidence, not just disease burden.
2. Innovation: explain the actual conceptual or technical advance. Do not claim that all worthwhile NIH research must be revolutionary.
3. Approach: connect each aim to design, subjects/models, controls, randomization and blinding where appropriate, sample-size rationale, analysis, quality controls, plausible outcomes, pitfalls, alternatives, resources, and a realistic timeline. Separate observed preliminary results from predictions. Do not present a power calculation as meaningful without its effect-size/variance assumptions.

Follow attachment requirements: PDF; ordinarily at least 11-point body text, no more than 15 characters per horizontal inch or six lines per vertical inch, and at least half-inch margins. Smaller graphic text may be acceptable if legible at 100%. Check searchable text, embedded fonts, filenames and file limits in the actual package. Do not put overflow narrative in appendices or hyperlinks. Preserve SciENcv-generated certification in its PDF instead of printing or altering it to imitate a manually formatted attachment.

Common Forms, disclosures, and data sharing

For application due dates and relevant JIT/RPPR/prior-approval submissions on/after January 25, 2026, NIH requires Common Forms; enforcement began May 8, 2026. Use SciENcv for the Biographical Sketch Common Form and NIH Supplement and the Current and Pending (Other) Support Common Form. There is no downloadable blank substitute for the SciENcv biosketch. Each investigator must review and certify accurate records, supply the required ORCID linkage to eRA Commons, and follow the current field limits. Do not reuse the retired five-page Word biosketch format. Other Support includes applicable external support and in-kind resources; reconcile scientific, budgetary, and commitment overlap with the actual instructions.

For data-generating activities covered by the DMS policy, use the updated structured plan format required for competing applications from May 25, 2026 under NOT-OD-26-046. NOT-OD-26-100 explains JIT/RPPR transitions and, effective October 1, 2026, reporting plan changes in RPPR C.5.c rather than obtaining DMS-plan prior approval. Check applicability and format for the mechanism; do not substitute a generic NSF plan. Cost data management, curation and sharing explicitly, with justified access restrictions.

Mechanism selection

• R01: individual research project; not limited to established investigators. Preliminary studies normally support feasibility; the instructions and NOFO determine requirements. There is no universal $250,000 minimum or maximum award budget.
• R21: exploratory/developmental; the activity-code guidance describes up to $275,000 direct costs across two years, no more than $200,000 in one year, and no required preliminary data. It is not renewable; that is different from a categorical ban on no-cost extensions. Check participating ICs and the NOFO.
• R03: small-scope research; use the active NOFO for budget, period and eligibility.
• R15: distinguish AREA and REAP eligibility; institutional research funding and student populations matter, not simply a label of "undergraduate institution."
• K and fellowship awards: check degree, citizenship/residency, career stage, protected effort, mentor/reference requirements, and IC-specific salary/research allowances. A K award is not a research-project grant with an extra training paragraph.
• U/P/R35 and other codes: use mechanism-specific scope and instructions. R35 is not synonymous with the NIGMS MIRA program across NIH.

NOT-OD-26-098 announces K-program changes for due dates on/after October 12, 2027, including consolidated codes, DMS-plan changes and clinical-trial restrictions. Do not apply those future rules to an October 2026 application merely because the notice exists.

Budget

Select the budget form using the NOFO and organization eligibility. For eligible applications, modular budgets request $25,000 modules, up to $250,000 direct costs per budget period excluding consortium F&A. Foreign institutions and SBIR/STTR do not use the modular format. Build a detailed internal estimate even when only a modular narrative is submitted. Modular personnel justification states names, roles and person-months, not salary or fringe rates. Explain variation in modules; there is no generic $125,000/25% rule.

The FY2026 Executive Level II cap is $228,000 effective January 1, 2026, as corrected by NOT-OD-26-038. The September 28 continuing-resolution notice continues FY2026 fiscal policies through December 11, 2026. Recheck for later awards. Use actual institutional salary, appointment basis and effort; the cap is not a salary recommendation. There is no general one-month PI effort limit. An NRSA stipend is not an employee postdoctoral salary scale.

Use the applicable negotiated F&A rate and base. NIH does not impose a blanket 8% F&A rate on domestic subawards. Do not apply the revised federal $50,000 MTDC subaward threshold automatically: NOT-OD-26-072 rescinded NIH implementation of revised MTDC/de-minimis provisions. Verify the applicable $25,000 treatment, agreement, and current fiscal instructions with the institution. Equipment classification also uses the current NIH form instructions and the institution's lower capitalization threshold where applicable.

Foreign collaborations no longer use ordinary nested foreign subawards for new applications. Consult the current subaward policy and PF5 instructions for eligible linked domestic/foreign award routes. Do not infer eligibility from a legacy budget webpage's mention of an 8% foreign consortium rate.

Submission and deadlines

Use the NOFO's Key Dates and current standard-date table. For example, standard new R01 dates are February/June/October 5; R01 A1 dates differ. NIH no longer uses dedicated AIDS deadlines after the 2026 transition. Dates are normally 5 p.m. applicant-organization local time; check weekends, federal holidays, late-submission rules and any emergency notices. Do not infer eligibility for late or continuous submission from old service history.

ASSIST, Grants.gov Workspace, and supported institutional system-to-system software are preparation/submission options. ASSIST routes through Grants.gov; eRA Commons is used to track receipt, errors and the assembled application, not an alternative public submission API. Confirm UEI/SAM, Grants.gov, organization/PI Commons accounts, affiliation and authorized signing roles well in advance. Do not assume registration will finish within a fixed number of days. Review validation errors and the assembled application within the applicable viewing/correction window.

NOT-OD-26-094 announces replacement of letters of support with short letters of collaboration at FORMS-J implementation in FY2027. It is not a blanket instruction to relabel FORMS-I attachments now. Confirm the implementation date and assigned form package; when effective, the notice limits each collaboration letter to 100 words and removes endorsements. Career/training commitments and confidential reference letters have distinct instructions.

Resubmission and feedback

NIH permits one A1 within 37 months of the initial application due date when the NOFO accepts resubmissions. Follow the resubmission policy, including waiting for the summary statement and restrictions on overlapping review. A subsequent new A0 is not an unrestricted right to simultaneous duplicate submission.

For a standard research A1, use an introduction of up to one page responding to major criticisms, then implement the changes throughout the application. Use exact final section/page references and explain disagreements with evidence. Do not mark changes by bolding, brackets, shading or track changes solely to identify revisions. Recheck limits for other application types. Decide what to revise from reviewer concerns and program fit, not invented score bands or historical payline predictions.