Tax Deadline 2026: When Are Taxes Due? (October 15 Extension Deadline Next)

October 15, 2026: the extension deadline

If you filed Form 4868, or paid electronically and marked the payment as an extension payment, by April 15, your 2025 return is due on October 15, 2026. It is a Thursday, so there is no weekend shift, and for most people there is no further extension: a return filed October 16 is late, with the failure-to-file penalty counted from October 15.

If you have not filed yet, e-file this week and pay what you can with the return. If a figure is still missing, such as a late K-1, file on time with your best figure and amend later on Form 1040-X: the 5% a month failure-to-file penalty is ten times the payment penalty. The IRS penalty calculator shows what a late balance has already cost.

2026 tax deadlines at a glance

Dates for individuals filing calendar-year returns. When a due date falls on a Saturday, Sunday or legal holiday, the IRS moves it to the next business day; none of the 2026 dates below needed to move.

When can I file my taxes for 2025 in 2026?

The IRS opened the 2026 filing season on Monday, January 26, 2026, and expected about 164 million individual returns. You can still file a 2025 return today. There is no penalty for filing late when you are due a refund, but you must claim it within three years of the due date or filing date (or two years after paying the tax, if later). A 2025 refund can be claimed until at least April 15, 2029.

Tax deadline 2027 for 2026 returns

The regular deadline for 2026 returns is Thursday, April 15, 2027. Emancipation Day, observed in Washington, D.C., falls on Friday, April 16, 2027, after the deadline, so it does not move the date. The extended deadline will be Friday, October 15, 2027.

As of October 8, 2026, the IRS has not announced when it will start accepting 2026 returns. It normally announces the opening date in early January; the season opened on January 27 in 2025 and January 26 in 2026. The 2026 standard deduction is $16,100 single, $32,200 joint and $24,150 head of household.

Quarterly estimated tax due dates for 2026 and 2027

Anyone who expects to owe at least $1,000 without enough withholding (self-employed people, landlords, many retirees) pays estimated tax with Form 1040-ES. The periods are uneven, and a payment on the next business day after a weekend or holiday is on time.

How to get a tax extension (and what it does not do)

Three ways to extend to October 15, all by the original due date and with no reason needed: pay electronically (IRS Direct Pay, EFTPS or card) and mark it as an extension payment; e-file Form 4868 through IRS Free File or software; or mail a paper Form 4868.

An extension of time to file is not an extension of time to pay. Interest runs on any tax not paid by April 15, and the failure-to-pay penalty of 0.5% a month applies too. The extension does protect you from the failure-to-file penalty, which is ten times larger, so asking for one is worthwhile even if you cannot pay.

There is one safety valve for payment. If at least 90% of the tax shown on the extended return was paid by April 15 and the rest is paid with the return by October 15, reasonable cause is presumed and no failure-to-pay penalty applies for the extension period (interest still does).

Americans abroad and military in combat zones

U.S. citizens and resident aliens whose home and main place of work are outside the United States and Puerto Rico on the regular due date, and service members on duty abroad, get an automatic two-month extension to June 15 to file and pay. For 2025 returns that was Monday, June 15, 2026; you attach a statement explaining which situation applies. Interest is still charged from April 15 on tax not paid by then.

Publication 54 adds three options: four more months, to October 15, with Form 4868 filed by June 15 (check the out-of-the-country box); a discretionary extension to December 15 requested by letter by October 15; and Form 2350, which extends to about 30 days after you expect to meet the bona fide residence or physical presence test.

Service members in a combat zone get at least 180 days after leaving it to file and pay.

Disaster-area postponements

When FEMA declares a disaster, the IRS usually postpones filing and payment deadlines for everyone whose address of record is in the covered counties, without any request. The IRS lists every announcement on its disaster relief page. Some current postponements cover the October 15, 2026 extension deadline:

• Indiana: 21 counties hit by storms that began August 11, 2026. Deadlines postponed to February 1, 2027, including 2025 returns on a valid extension (IN-2026-01).
• Washington: wildfires from July 31, 2026 in Chelan, Ferry, Okanogan, Spokane, Stevens and Yakima counties and three tribal areas. Postponed to February 1, 2027 (WA-2026-03).
• Michigan: 37 counties hit by storms that began April 10, 2026. Postponed to November 2, 2026, including extended 2025 returns (MI-2026-02).
• Others: parts of Nebraska, Hawaii County, West Virginia, Mississippi and the Northern Mariana Islands (February 1, 2027); Wisconsin (November 2, 2026). Check your county on the IRS list.

State tax deadlines that differ from April 15

Most states with an income tax use April 15 and accept the federal extension or grant an automatic one to October 15. Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington and Wyoming have no income tax return on wages (Washington taxes some capital gains). These states set their own dates for 2025 returns:

What happens if you miss the tax deadline

If you owe tax and file late, the failure-to-file penalty is 5% of the unpaid tax for each month or part of a month the return is late, up to 25%. The failure-to-pay penalty is 0.5% a month, also up to 25%. When both apply, the combined rate is 5% a month. A return more than 60 days late has a minimum filing penalty of $525 (returns due in 2026) or 100% of the unpaid tax if less. Interest compounds daily on top.

Example: a 2025 balance of $4,000, no extension, filed and paid on August 20, 2026. That is five months (or part of a month) late, so the filing penalty is 4.5% x 5 = 22.5% ($900), the payment penalty is 0.5% x 5 = 2.5% ($100), and interest at 6% then 7% adds $110.22. Had the same person filed on time and paid late, the penalty would have been $100 instead of $1,000. First-time abatement can remove both penalties after a clean three-year record.