The federal tax filing deadline is April 15 each year, unless that date falls on a weekend or holiday

For the 2024 tax year, you must file by April 15, 2025. If April 15 falls on a Saturday or Sunday, the deadline moves to the following Monday. If a federal holiday falls on April 15 or the Monday after, the IRS pushes the deadline to the next business day. You can check the IRS website each year for the exact date, since it changes based on the calendar.

This deadline applies to federal income tax returns filed with the IRS. State tax deadlines are usually the same day, though a few states have different dates — check your state's tax authority website if you file in a state other than where you live or work.

The deadline is firm for paper returns mailed to the IRS and for electronic returns filed through tax software or a tax preparer. If your return arrives after midnight on the deadline date, it is considered late, even if you mailed it earlier.

Key Takeaways

  • The federal deadline is April 15 unless that date is a weekend or holiday, in which case it moves to the next business day.
  • Filing electronically is faster and more reliable than mailing a paper return, and the IRS processes e-filed returns within 21 days in most cases.
  • If you cannot file by the deadline, you can request an automatic extension that gives you until October 15, but the extension applies only to filing, not to paying taxes owed.
  • Penalties for filing late start at 5 percent of unpaid taxes per month, and penalties for paying late are separate and also compound monthly.
  • If you are owed a refund, there is no penalty for filing late, though you will not receive your refund until after the IRS processes your return.

What happens if you file after April 15

The IRS charges a failure-to-file penalty if your return arrives after the deadline and you do not have an extension. The penalty is 5 percent of the unpaid taxes for each month or part of a month that the return is late, up to a maximum of 25 percent. This penalty applies even if you are owed a refund — though in that case, you will not owe money, just receive your refund later.

If you owe taxes and file late, you also face a failure-to-pay penalty of 0.5 percent per month on the unpaid balance, separate from the filing penalty. Interest accrues daily on unpaid taxes at a rate set by the IRS each quarter — for 2024, that rate is 8 percent annually. Both penalties and interest compound, so the longer you wait, the more you owe.

If you filed on time but paid late, you avoid the filing penalty but still owe the payment penalty and interest. The IRS considers a return filed on time if it was postmarked by the deadline (for paper returns) or submitted electronically by midnight (for e-filed returns).

How to request an extension if you cannot file by April 15

You can request an automatic extension by filing Form 4868 with the IRS before the April 15 deadline. This form does not require the IRS to approve your reason — it is automatic if you file the form on time. The extension gives you until October 15 to file your return, six months longer than the original deadline.

You can file Form 4868 electronically through tax software, by mail, or by phone. If you file electronically or by phone, the IRS processes it immediately. If you mail it, it must be postmarked by April 15. You do not need to wait for written confirmation from the IRS — filing the form itself grants the extension.

An extension to file is not an extension to pay. If you expect to owe taxes, you should pay as much as you can by April 15, even if you file the extension form. Any unpaid balance will accrue penalties and interest from April 15 onward, regardless of whether you have until October 15 to file. Paying early reduces the interest and penalties you owe.

State tax deadlines and special circumstances

Most states follow the federal April 15 deadline, but some differ. Massachusetts and Maine observe April 17 in 2025 because April 15 falls on a Tuesday after a Monday holiday. A few states have no income tax at all — Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington, and Wyoming do not tax wages. If you live in one of these states but earned income in another state, you may still need to file in the state where you worked.

If you are a U.S. citizen or resident alien living abroad, you get an automatic two-month extension until June 15 to file and pay, without filing Form 4868. You can request an additional four-month extension (until October 15) by filing Form 4868 before June 15.

Self-employed people and business owners follow the same April 15 deadline for personal income tax returns, though estimated quarterly taxes are due on different dates throughout the year — April 15, June 15, September 15, and January 15 of the following year.

Why the IRS sets the deadline and what it means for you

The April 15 deadline is set by federal law and has been in place since 1913. The IRS uses this single date to manage the volume of returns it receives — roughly 150 million individual returns arrive between January and April each year. Filing early, especially electronically, reduces delays in processing and speeds up refunds.

The deadline applies to all filers, regardless of income, filing status, or whether you owe money or expect a refund. The only exception is the automatic extension for people living abroad. If you have a complex return — multiple income sources, business income, rental property, or significant deductions — filing early gives you time to gather documents and work with a tax preparer without rushing.

Frequently Asked Questions

Can I file my taxes before January 1?

No. The IRS does not accept returns for a given tax year until January 1. Tax software and tax preparers will not let you file before that date. You can prepare your return and gather documents earlier, but the actual filing must wait until January.

What if April 15 is a Saturday or Sunday?

The deadline moves to the following Monday. If a federal holiday falls on Monday, the deadline becomes Tuesday. The IRS announces the exact date each year on its website. For 2025, April 15 is a Tuesday, so the deadline is April 15.

Do I have to file if I do not owe taxes?

If you are owed a refund, you are not required to file, but you should — otherwise you will not receive your refund. If you owe taxes, you must file by the deadline or request an extension. Check the IRS website for income thresholds that determine whether you must file based on your age and filing status.

What if I file my extension but miss the October 15 deadline?

The same penalties apply. You will owe a failure-to-file penalty of 5 percent per month on any unpaid taxes, plus interest. Filing an extension does not erase the deadline — it only moves it. If you cannot meet October 15, contact the IRS immediately to discuss payment options.

Does filing electronically change the deadline?

No. The deadline is April 15 whether you file on paper or electronically. However, electronic filing is more reliable — the IRS confirms receipt immediately, and you avoid mail delays. If you file electronically, the deadline is midnight on April 15 in your time zone.