Next federal deadline
Q3 2026 estimated tax
· · Individuals & Sole Proprietors
OCT15ThuForm 1040 extension deadline (Form 4868)October 15, 2026NOV2MonForm 941 Q3 2026 (payroll tax)November 2, 2026JAN15FriQ4 2026 estimated tax (Jan 15, next year)January 15, 2027
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2026 federal calendar
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- The next federal business tax deadline is Q3 2026 estimated tax on .
- The 2026 federal calendar on this site has 17 filing and payment deadlines.
- Quarterly estimated tax for calendar-year filers is due April 15, June 15, September 15, and January 15 of the following year.
- Partnership and S-corporation returns are due March 15; C-corporation and individual returns are due April 15.
- Dates are recomputed from IRS Publication 509 rules as of .
Federal dates: computed from statute
Weekend and federal-holiday shifts applied per 26 U.S.C. 7503.
State table: under review
Labeled unverified until checked against each revenue department.
2026 at a glance
Red days are federal deadlines. Click one to jump to its entry.
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Guides
Guide
Quarterly estimated taxes
Who owes quarterly estimated tax, the four due dates, and how to pay.
Guide
W-2 and 1099 deadlines
Filing dates for W-2 and 1099-NEC, and who must file each.
Guide
Form 941 payroll tax
Quarterly employer payroll return dates and deposit schedules.
Guide
Tax extension deadlines
How extensions work, which form to file, and what they do not extend.