Tax filing and extension deadlines for 2026 returns
Most people must file their 2026 federal return or request an extension by April 15, 2027. With an extension, the deadline becomes October 15, 2027. Pick your return type to see your dates.
Reviewed October 30, 2026 against IRS.gov guidance. How we check facts.
Tax extension deadline checker
- Original due date
- Thursday, April 15, 2027
- File this to extend
- Form 4868, by the original due date
- Extended due date
- Friday, October 15, 2027
- Pay what you owe by
- Thursday, April 15, 2027
- Days left
- Turn on JavaScript to count the days.
Dates move to the next business day when they fall on a weekend or legal holiday. If you live in a federally declared disaster area, the IRS may have postponed your dates; check IRS disaster relief.
All 2026 federal deadlines at a glance
| Return | Due | Extension form | Extended due |
|---|---|---|---|
| Individual (Form 1040) | Thursday, April 15, 2027 | Form 4868 | Friday, October 15, 2027 |
| Estate or trust (Form 1041) | Thursday, April 15, 2027 | Form 7004 | Thursday, September 30, 2027 |
| Partnership or multi-member LLC (Form 1065) | Monday, March 15, 2027 | Form 7004 | Wednesday, September 15, 2027 |
| C corporation, calendar year (Form 1120) | Thursday, April 15, 2027 | Form 7004 | Friday, October 15, 2027 |
| Individual living outside the US (Form 1040) | Tuesday, June 15, 2027 | Form 4868 | Friday, October 15, 2027 |
| S corporation (Form 1120-S) | Monday, March 15, 2027 | Form 7004 | Wednesday, September 15, 2027 |
Calendar-year filers. Fiscal-year businesses use the 15th day of the corresponding month after year-end.
Other dates to know
- Estimated tax payments for 2026: the fourth installment is due January 15, 2027.
- Living abroad: an automatic extension to June 15, 2027, but interest on unpaid tax runs from April 15.
- Combat zones: generally at least 180 days after leaving the zone to file and pay.
- Disaster areas: the IRS often postpones deadlines for federally declared disasters. Check IRS disaster relief for your county.
Missed a date? See what happens after the deadline.
Frequently asked questions
What is the tax extension deadline in 2027?
For 2026 individual returns, request an extension by Thursday, April 15, 2027. The extended filing deadline is Friday, October 15, 2027.
When are 2026 business tax returns due?
Partnerships (Form 1065) and S corporations (Form 1120-S) are due Monday, March 15, 2027, extendable to September 15. Calendar-year C corporations (Form 1120) are due April 15, extendable to October 15. Estates and trusts (Form 1041) are due April 15, extendable to September 30.
What if the deadline falls on a weekend or holiday?
It moves to the next business day. Legal holidays in the District of Columbia count, including Emancipation Day on April 16, which is why some years’ deadline is April 17 or 18.
Is it too late to file an extension for 2025 taxes?
Yes. The 2025 extension request was due April 15, 2026, and the extended deadline was October 15, 2026. If you haven’t filed a 2025 return, file it as soon as possible to limit penalties; if you’re owed a refund, there’s no late-filing penalty.