Missed the tax extension deadline? What to do now

Can I still file an extension after the deadline?

Generally, no. An extension request must be filed by the applicable deadline, which for most taxpayers is the original return due date. A request filed after that deadline generally does not create a valid extension. Special automatic-extension and postponement rules may provide a later deadline in some circumstances. Do not send one late; put the time into the return.

File the return as soon as it is accurate. Penalties are charged for each month or part of a month, so two weeks late costs the same as four, but a second month's penalty starts once you pass one month.

What happens if I file late without an extension?

You are charged a failure-to-file penalty of 5% of the unpaid tax for each month or part of a month the return is late, up to 25%, plus a failure-to-pay penalty of 0.5% per month, plus interest. When both apply in the same month, the failure-to-file penalty is reduced to 4.5%, so the combined rate is 5% per month.

Example: you owe $4,000, pay nothing, and file 2 months late. Penalties are 5% × 2 months × $4,000 = $400, plus interest at the federal short-term rate plus 3 points, compounded daily.

If an income tax return required to be filed in 2027 is more than 60 days late, including extensions, the minimum failure-to-file penalty is the lesser of $535 or 100% of the tax required to be shown on the return. Caps and how the two penalties interact are in the penalties guide; to see what your own dates cost, use the penalty calculator.

What if I'm owed a refund?

There is no failure-to-file penalty, no failure-to-pay penalty, and no interest, because all three are calculated on unpaid tax and you have none. You are just leaving money with the IRS until you file.

There is still a deadline. A claim for credit or refund generally must be filed by the later of three years from the date the return was filed or two years from the date the tax was paid, subject to statutory lookback rules and exceptions. If you had untaxed income, do not assume you are owed a refund — file and find out. If your only payments were withholding, the practical deadline is three years from the original due date; file by then or the refund is generally lost.

What if I already filed an extension but miss the extended deadline?

The failure-to-file penalty starts, and there is no second extension for a Form 1040. The failure-to-pay penalty and interest have been running since the original due date, and the failure-to-file penalty is calculated on the tax that was unpaid as of that original date, not on what you owe today.

The months are counted from the extended due date, provided the extension was valid: filed on time with a good-faith estimate of your tax. If the extension is determined to be invalid because the taxpayer did not make a bona fide and reasonable effort to properly estimate the tax, the failure-to-file penalty may instead apply from the original due date. A later discovered balance due does not, by itself, mean the original estimate was invalid. Either way: file now.

What should I do right now?

1. 1

   File the return

   E-file if you can. Missing a W-2 or 1099? The wage and income transcript in your IRS online account lists what was reported under your SSN.

2. 2

   Pay what you can

   IRS Direct Pay, EFTPS, or a card on IRS.gov. Paying as much as possible reduces the unpaid balance on which interest and any applicable failure-to-pay penalty continue to accrue.

3. 3

   Set up a payment plan if you can't pay in full

   Most individuals can apply online; Form 9465 is the paper alternative. The reduced 0.25% failure-to-pay rate during a plan applies only if the return was filed on time, so it will not help here, but the IRS generally does not levy while an agreement is in effect.

4. 4

   Ask for penalty relief once the notice arrives

   Check whether you qualify for penalty relief. For eligible original returns with due dates on or after January 1, 2027, the IRS's Automatic Exemption from Penalty (AEP) replaces the First Time Abate. Taxpayers who do not qualify for AEP may still request reasonable-cause relief when the facts support it. Interest on the tax is not removed.

5. 5

   Respond to every IRS letter by its date

   After a notice of intent to levy, the failure-to-pay rate doubles to 1% per month.

Does this apply to business and nonprofit returns?

Yes, with different penalties. A late Form 1065 or Form 1120-S is penalized per partner or shareholder, per month, for up to 12 months, even though the entity owes no income tax. For returns required to be filed in 2027, the penalty is $260 per partner or shareholder for each month or part of a month the return is late, for up to 12 months. A four-partner partnership filing two months late could therefore face a $2,080 penalty. C corporations and trusts (Forms 1120 and 1041) pay the same 5% and 0.5% penalties on unpaid tax as individuals.

For returns required to be filed in 2027, the late-filing penalty for an organization generally is $25 per day, capped at the lesser of $13,000 or 5% of gross receipts for the year. For an organization with gross receipts exceeding $1,339,500, the penalty is $130 per day, up to $66,500. The bigger danger is revocation: after three consecutive missed 990-series returns, including Form 990-N, the IRS automatically revokes tax-exempt status. If this is year two or three, file today. Business filers start at Form 7004, nonprofits at Form 8868.

Could my deadline be later than I think?

Sometimes. Check these before you assume you are late.

• You paid electronically and marked it as an extension payment. A payment made on IRS.gov by the original due date and designated for an extension counts as filing Form 4868. You already have one.
• You live and work outside the United States and Puerto Rico. Qualifying U.S. citizens and resident aliens abroad, and qualifying members of the military or naval service outside the United States and Puerto Rico, receive an automatic two-month extension to file and pay. For calendar-year taxpayers in 2027, that generally extends the deadline to June 15, 2027. Interest on unpaid tax still accrues from April 15, 2027. If additional filing time is needed, Form 4868 may generally be filed by June 15, 2027 to extend the filing deadline to October 15, 2027.
• A federally declared disaster hit your area. The IRS postpones filing and payment deadlines for affected areas and announces the new date per disaster. Relief is automatic for addresses in the covered area; check the disaster-relief page on IRS.gov.
• You served in a combat zone or qualified hazardous-duty area. Filing and payment deadlines generally are postponed for at least 180 days after the later of the last day of qualifying service or qualifying hospitalization, plus the number of days that remained in the applicable filing period when the taxpayer entered the combat zone.
• You are a fiscal-year filer. Your due date is a set number of months after your year-end; see the fiscal-year rules in the deadlines guide.

Missed-deadline FAQ

Sources

• Form 4868, with its instructions (PDF): Form 4868 must be filed by the due date, the six-month limit, no reason needed, a payment marked for an extension counts as filing, and an unreasonable estimate voids the extension
• Instructions for Form 7004: Form 7004 must be filed by the due date
• Instructions for Form 8868: a Form 8868 filed after the due date has no effect
• IRS: Failure to file penalty: the 5% a month penalty, the 4.5% offset, the 60-day minimum, and the per-owner penalty
• IRS: Failure to pay penalty: the 0.5% a month penalty, part months, the 0.25% payment-plan rate, and the 1% rate after a levy notice
• Revenue Procedure 2025-32 (PDF): the minimum-penalty and per-owner amounts for returns due in 2027
• IRS: Quarterly interest rates: interest: the federal short-term rate plus 3 points, compounded daily
• Internal Revenue Manual 20.1.2, Failure To File/Failure To Pay Penalties: how penalty months are counted when an extension was valid, and when an extension is invalid
• IRS: Filing past due tax returns: the three-year refund window, and the substitute return
• IRS: Payment plans; installment agreements: payment plans, Form 9465, and no levy while a plan is in effect
• IRS: Direct Pay with bank account: paying through IRS Direct Pay
• IRS: Get an extension to file your tax return: paying online and marking it as an extension payment
• IRS: Penalty relief for reasonable cause: reasonable-cause relief
• IRS: Administrative penalty relief: Automatic Exemption from Penalty replaces First Time Abate
• IRS: U.S. citizens and resident aliens abroad: automatic 2-month extension of time to file: the automatic two-month extension for U.S. citizens and residents abroad
• IRS: Tax relief in disaster situations: disaster postponements
• Instructions for Form 1120: C corporations: the same percentage penalties on unpaid tax
• Instructions for Form 1041: trusts: the same percentage penalties on unpaid tax
• IRS: Annual exempt organization return: penalties for failure to file: the per-day penalty on a late Form 990
• IRS: Automatic revocation of exemption: automatic revocation after three years without filing