Grant Deadlines 2026: Federal Fiscal Year End and the September 30 Cliff
Federal grant deadlines pile up before September 30, 2026. Month-by-month closing counts, plus the verified NIH and SBIR due dates and an eight-week run-up plan.
Last updated: August 2026
Grant deadlines 2026 follow the federal fiscal calendar, not the calendar year. The federal fiscal year ends on September 30, and hundreds of federal, state, and local closing dates are timed against it. In GrantCue's tracked catalog, 308 opportunities close during September 2026 and 67 of them close on September 30 itself. The pile-up is a budget artifact rather than a coincidence, and it plays out differently agency by agency.
Quick Answer: When Do Most Federal Grant Deadlines Fall in 2026?
The heaviest grant deadline period of 2026 runs from mid-August through September 30, the last day of the federal fiscal year. GrantCue's catalog records 386 closings in August, 308 in September, and 67 on September 30 alone. Volume then drops to 128 in October, 77 in November, and 45 in December.
Why September 30 Matters for Grant Deadlines
September 30 is the last day of the federal fiscal year, which makes it the last day a large share of appropriated money can legally be obligated. Under 31 U.S.C. 1102, "The fiscal year of the Treasury begins on October 1 of each year and ends on September 30 of the following year." Under 31 U.S.C. 1502(a), the balance of an appropriation limited to a definite period "is available only for payment of expenses properly incurred during the period of availability." Both sections were verified at uscode.house.gov on August 9, 2026.
An agency holding one-year money either obligates it before the clock runs out or gives it back. The Government Accountability Office puts it directly: "As funds approach the end of their period of availability for obligation, a 'use-it or lose-it' mentality can set in, creating an incentive to rush to obligate" (GAO-17-807T, published September 20, 2017).
Not every federal dollar works this way. GAO's glossary of federal budget terms (GAO-05-734SP) separates one-year authority, which expires at fiscal year end, from multiyear authority, available for a fixed period longer than one fiscal year, and no-year authority, available for an indefinite period. An office running on no-year money feels much less September pressure, which is why some agencies post a wall of September closings and others post almost none.
For applicants that means congestion. The portal help desk gets slower in the same three weeks your signing official and finance office are busiest. Put every September closing date on a shared grant calendar for grants management in early August.
Grant Deadlines 2026: The Data on the September Cliff
Across GrantCue's tracked catalog, deadline volume peaks in August and September, then falls by more than half in October.
| Month (2026) | Opportunities closing | Change from prior month |
|---|---|---|
| August | 386 | Peak month |
| September | 308 | Down 78 |
| October | 128 | Down 180 |
| November | 77 | Down 51 |
| December | 45 | Down 32 |
67 programs close on September 30 alone, and 177 close between September 15 and 30. That puts 57% of the month's deadlines inside its final two weeks, so most of a team's September submissions end up competing for the same internal reviewers and the same signature.
Methodology: figures reflect active opportunities in GrantCue's catalog as of August 9, 2026, aggregated from Grants.gov and 31 state and state-agency sources across 28 states, 27 of which carried active opportunities in this pull. Dollar totals sum published estimated funding only; 83% of records publish no amount, so totals are a floor, not a census. One record listing exactly $2,147,483,647 (an integer overflow sentinel in the source feed, not a real award) was excluded from all dollar figures. This describes what GrantCue tracks, not every grant in America.
State and local programs are the easiest part of the pile-up to miss. The August 2026 grant funding snapshot breaks down how much tracked money now sits on state portals rather than Grants.gov. Those portals run different software state by state, so one Grants.gov search never surfaces their September closings. Watching all of them at once takes grant discovery across federal and state portals.
NIH Grant Deadlines 2026: Standard Due Dates
NIH publishes fixed standard due dates by activity code instead of one annual deadline. The dates below come from the NIH standard due dates page at grants.nih.gov, last updated March 24, 2026 and checked August 9, 2026. A notice of funding opportunity can override a standard date, so confirm against the NOFO.
| Activity code | New application due dates |
|---|---|
| R01 | February 5, June 5, October 5 |
| R03, R21, R33, R34 | February 16, June 16, October 16 |
| R15 (AREA) | February 25, June 25, October 25 |
| K series | February 12, June 12, October 12 |
| F series fellowships | April 8, August 8, December 8 |
| T series training | January 25, May 25, September 25 |
| P series (program project, center) | January 25, May 25, September 25 |
| R13, U13 (conference) | April 12, August 12, December 12 |
| SBIR and STTR (R41, R42, R43, R44, UT1, UT2, U43, U44, SB1, UB1) | September 5, January 5, April 5 |
Renewal, resubmission, and revision applications shift a month later for R01 (March 5, July 5, November 5), K series (March 12, July 12, November 12), and R03, R21, R33, R34 (March 16, July 16, November 16). F series fellowships keep April 8, August 8, and December 8.
NIH rolls a due date forward when it lands on a non-business day: "When a postmark/submission date falls on a weekend, Federal holiday, or Washington, DC area Federal office closure, the application deadline is automatically extended to the next business day" (NIH submission policies page, last updated March 31, 2026). Four standard dates in the rest of 2026 move. Weekdays and federal holidays were checked August 9, 2026.
| Standard date | Why it moves | Working date |
|---|---|---|
| September 5, 2026 (SBIR, STTR) | Saturday, and Labor Day falls Monday September 7 | Tuesday, September 8, 2026 |
| October 12, 2026 (K series) | Columbus Day, a federal holiday | Tuesday, October 13, 2026 |
| October 25, 2026 (R15) | Sunday | Monday, October 26, 2026 |
| December 12, 2026 (R13, U13) | Saturday | Monday, December 14, 2026 |
NIH also runs a different clock from most of Grants.gov: applications are due "by 5:00 PM local time of applicant organization on the specified due date," while many Grants.gov notices set 11:59 p.m. Eastern Time.
Meeting the due date is only the start of a fixed review cycle.
| Cycle | Example new R01 due date | Scientific merit review | Advisory council | Earliest project start |
|---|---|---|---|---|
| Cycle I | February 5 | June to July | August or October | September or December |
| Cycle II | June 5 | October to November | January | April |
| Cycle III | October 5 | February to March | May | July |
An application filed at the Cycle III due date of October 5 has an earliest project start date of July, nine months later. NIH also requires applications to be complete at submission: placeholder attachments "must not be used," and non-compliant applications "will be withdrawn" (NOT-OD-26-025, December 17, 2025).
SBIR Grant Deadlines 2026: Solicitation Cycles
SBIR and STTR deadlines follow agency solicitation cycles rather than one national date, and the three largest programs each run a different pattern.
NIH uses standard due dates of September 5, January 5, and April 5 for R41, R42, R43, R44, UT1, UT2, U43, U44, SB1, and UB1 (grants.nih.gov, checked August 9, 2026). September 5, 2026 is a Saturday and the next Monday is Labor Day, so the working date is Tuesday, September 8, 2026.
The Department of Defense runs a rolling monthly cycle. SBIR.gov, using the department's secondary title from Executive Order 14347, states that "Department of War releases are the first Wednesday of each month, and closes the last Wednesday of the following month" and that "All agencies have a 45 day lead in period." On August 9, 2026, that page showed 337 open topics with a release date of August 5, an open date of August 26, and a close date of September 23, 2026.
NSF requires an invitation before a Phase I proposal is allowed. Solicitation NSF 26-510, posted May 22, 2026, states that proposers "must submit a Project Pitch and receive an official response (via email) from the program staff." Remaining full proposal deadlines in that solicitation are November 4, 2026, the first Wednesday in November, March 4, 2027, and July 7, 2027, each due by 5 p.m. submitting organization's local time.
SBIR.gov's agency solicitation pages cover the other participants. DOE releases its funding opportunity announcements in August and November annually. HHS runs three response windows: April to May, June to August, and September to November (sbir.gov, checked August 9, 2026).
The invitation step is what breaks small-company schedules. A firm without an NSF Project Pitch response cannot submit a Phase I proposal at all. NIH adds a second trap: small business applications (R41, R42, R43, R44, SB1, UT1, U44) are excluded from its late application period entirely, so the September working date is hard (NOT-OD-26-064). Guidance on running these awards after the win is in the SBIR/STTR grant management guide.
What Fiscal Year End Changes, and What Is a Myth
Fiscal year end changes obligation pressure inside agencies and workload inside applicant organizations. It does not change the rules governing your submission.
| Common claim | What the sources say |
|---|---|
| All federal grant money disappears on September 30 | Only one-year authority expires then. Multiyear authority runs a fixed period longer than one year, and no-year authority is indefinite (GAO-05-734SP) |
| Agencies extend deadlines because September is busy | NIH's late window is two calendar weeks, and service on an NIH review panel is the only pre-authorized reason. Correcting application errors after the deadline is listed as unacceptable, and fellowship, small business, and collaborative international applications are not eligible at all (NOT-OD-26-064, for due dates on or after May 25, 2026) |
| Applying in September gets funded faster | An NIH Cycle III application due October 5 carries an earliest project start date of July |
| A fourth-quarter obligation surge means waste | "Higher obligations in the fourth quarter of a fiscal year do not necessarily indicate a problem with wasteful spending" (GAO-17-807T, September 20, 2017) |
| Nothing closes after September 30 | 128 tracked opportunities close in October 2026, 77 in November, and 45 in December |
An 8-Week Run-Up Plan for a September 30 Deadline
An eight-week run-up works backward from the closing date, not forward from today. September 30, 2026 is a Wednesday, so the practical window is the last three days of the month. Shift every date below to match your own closing date.
| Week | Dates (2026) | Work to finish |
|---|---|---|
| Week 8 | Aug 3 to 9 | Confirm eligibility, award ceiling, cost share, and the exact submission time and time zone. Check the SAM.gov expiration date |
| Week 7 | Aug 10 to 16 | Assign every section to a named owner. Request letters of support and partner commitments |
| Week 6 | Aug 17 to 23 | First narrative draft. Finance builds the budget from real salary, fringe, and indirect figures |
| Week 5 | Aug 24 to 30 | Review narrative and budget together. Resolve any scope the budget does not fund |
| Week 4 | Aug 31 to Sep 6 | Second draft. Collect attachments: indirect rate agreement, audit, registrations, biosketches or resumes |
| Week 3 | Sep 7 to 13 | Compliance read against the NOFO checklist, requirement by requirement |
| Week 2 | Sep 14 to 20 | Final edits, formatting, and page limits. Authorized representative reviews and signs |
| Week 1 | Sep 21 to 27 | Assemble in the portal, run validation, clear every error |
| Final | Sep 28 to 30 | Submit no later than Sep 28. Confirm the validation email before Sep 30 |
The submission target is two days early. Grants.gov tells applicants who have not received their confirmation items "within two business days" to check spam settings and contact support (Grants.gov Check Application Status help page, checked August 9, 2026). Submit at 11:00 p.m. on the closing date, get errors back, and there is no time to fix them.
How to Avoid Missing a Grant Deadline
Missed federal deadlines usually come from a lapsed registration or a failed validation, not from an unfinished narrative. Four controls head off most of them.
1. Track a buffer date. Show everyone an internal due date two to three business days ahead of the funder's date, and keep the real closing date, time, and time zone in the same record. Name one owner per deadline and one backup who can submit.
2. Renew SAM.gov before it becomes urgent. SAM.gov states "You must renew your registration every 365 days to keep it active" and "Registration can take up to 10 business days to become active" (sam.gov entity registration page, checked August 9, 2026). Grants.gov adds that if entity information "isn't available or verified, it could take weeks or months" (Grants.gov applicant registration page, checked August 9, 2026). An expired registration blocks submission with no advance warning. Start the renewal 60 days out.
3. Record the clock, not the date alone. Storing "September 30" without its time and time zone is how a Pacific time organization discovers at 9:00 p.m. that an 11:59 p.m. Eastern deadline passed three hours ago.
4. Treat the confirmation email as the finish line. A Grants.gov tracking number confirms receipt, not acceptance. Save the tracking number and the confirmation PDF in the grant record the same day you submit.
A shared grant calendar only works here if it holds registration renewals alongside application deadlines. Portal expirations and indirect rate agreement end dates belong in the same view as the closing dates they can block. Audit dates too. The same goes for keeping deadlines in a grant tracking system rather than a personal calendar: when the owner leaves, the dates stay.
FAQ
When does the federal fiscal year end?
The federal fiscal year ends on September 30. Under 31 U.S.C. 1102, it begins October 1 and ends September 30 of the following year. Fiscal year 2026 ends on Wednesday, September 30, 2026, and fiscal year 2027 begins Thursday, October 1, 2026.
What are the NIH grant deadlines in 2026?
NIH uses standard due dates by activity code. New R01 applications are due February 5, June 5, and October 5. R03, R21, R33, and R34 are due February 16, June 16, and October 16. SBIR and STTR applications are due September 5, January 5, and April 5, all by 5:00 PM local time of the applicant organization (grants.nih.gov, checked August 9, 2026).
Do federal grant deadlines move if they fall on a weekend?
NIH deadlines do. NIH policy states that when a submission date falls on a weekend, a federal holiday, or a Washington, DC area federal office closure, the deadline moves to the next business day. Other agencies set their own rules, so check the notice of funding opportunity.
Does unspent federal grant money disappear on September 30?
Only money from one-year appropriations. GAO's budget glossary (GAO-05-734SP) defines one-year authority as expiring at the end of the fiscal year, multiyear authority as available for a fixed period longer than one fiscal year, and no-year authority as available for an indefinite period.
What time are federal grant applications due?
It depends on the agency. NIH sets 5:00 PM local time of the applicant organization. Many Grants.gov notices set 11:59 p.m. Eastern Time. NSF solicitation 26-510 sets 5 p.m. submitting organization's local time. The closing time appears in the notice of funding opportunity.
Next Step
Pull every deadline you carry through December 31, 2026 into one list, add the submission time and time zone to each, and put your SAM.gov expiration date beside them. Then set an internal date two business days ahead. 67 programs close on one Wednesday this year, and a shared grant calendar is how you see that in August instead of the week it happens.