The federal income tax important date is April 15, unless that date falls on a weekend or holiday

The standard important date to file your federal income tax return and pay any taxes owed is April 15 of the year following the tax year. For the 2024 tax year (income earned January 1 through December 31, 2024), you would file by April 15, 2025. If April 15 falls on a Saturday or Sunday, the important date moves to the following Monday. If it falls on a federal holiday, the important date moves to the next business day.

You do not need to wait until April 15 to file. Many people file in January or February once they have received all their tax documents — W-2s from employers, 1099s from investment accounts or side income, and mortgage interest statements. Filing early can mean receiving a refund sooner if you are owed one.

If you cannot file by April 15, you can request an extension, but this only extends the filing important date, not the payment important date. Taxes owed are still due on April 15, even if you file your return later.

Key Takeaways

  • The federal income tax important date is April 15 unless it falls on a weekend or holiday, in which case it moves to the next business day.
  • You can file your return anytime after January 1 and do not have to wait until April 15.
  • An extension to file (Form 4868) gives you until October 15 to submit your return, but taxes owed are still due by April 15.
  • If you owe taxes and do not pay by April 15, the IRS will charge interest and penalties on the unpaid amount.
  • State income tax important date usually match the federal important date, but some states have different dates — check your state's tax authority website.

When the April 15 important date changes

The IRS publishes the exact important date each year because it depends on the calendar. In 2025, April 15 is a Tuesday, so that is the important date. In 2026, April 15 is a Wednesday. In 2027, April 15 is a Thursday. When April 15 falls on a Saturday (as it will in 2028), the important date becomes Monday, April 17. When it falls on a Sunday (as it will in 2034), the important date becomes Monday, April 17.

Federal holidays can also shift the important date. If April 15 falls on a day when the IRS offices are closed for a federal holiday, the important date moves to the next day the IRS is open. This is rare but has happened in the past when Emancipation Day (June 19, observed in Washington, D.C.) has affected tax important date.

The IRS announces the exact important date for each year on its website (irs.gov) by December of the prior year. If you are unsure, check there rather than assuming April 15.

Filing early versus waiting until April 15

You can file as soon as you have all the documents you need, which for most people is late January or early February. W-2s must be sent to you by January 31. 1099s for interest, dividends, and self-employment income must be sent by January 31 as well. If you are waiting for a mortgage interest statement (Form 1098) or education expense records, those can arrive as late as early February.

Filing early has one clear advantage: if you are owed a refund, you receive it sooner. The IRS typically issues refunds within 21 days of accepting your return if you file electronically and choose direct deposit. Filing in January means you could have your refund by mid-February. Filing on April 14 means you could have it by early May.

Filing early also gives you time to correct mistakes before the important date. If the IRS rejects your return because of an error, you have weeks to fix it and resubmit. Filing on April 14 leaves no margin for error.

What happens if you miss the April 15 important date

If you do not file by April 15 and do not have an extension, the IRS charges a failure-to-file penalty. This penalty is 5% of the unpaid tax for each month (or part of a month) that your return is late, up to a maximum of 25%. If you owe $1,000 in taxes and file two months late, the penalty is roughly $100.

If you owe taxes and do not pay by April 15, the IRS also charges a failure-to-pay penalty of 0.5% per month on the unpaid balance, plus interest. Interest accrues daily at a rate set quarterly by the IRS (currently around 8% annually, but this changes). These charges compound, so the longer you wait, the more you owe.

If you file late but do not owe taxes (because you are owed a refund), there is no penalty. However, you lose the ability to claim that refund after three years. If you are owed a refund for 2024 and do not file by April 15, 2027, the IRS keeps the money.

Requesting a filing extension with Form 4868

You can request an automatic six-month extension by filing Form 4868 (process for Automatic Extension of Time To File U.S. Individual Income Tax Return) before April 15. This moves your filing important date to October 15. You do not need a reason to request an extension — the IRS grants it automatically if you file the form on time.

Filing Form 4868 does not extend the important date to pay taxes owed. If you estimate you will owe $500, you should pay that $500 by April 15 even if you file the extension form. If you do not pay by April 15, you owe interest and penalties on the unpaid amount from April 15 forward, even though your return is not due until October 15.

You can file Form 4868 electronically through tax software, by mail, or by phone (for certain taxpayers). The form is straightforward and takes a few minutes. If you file it by April 15, you automatically have until October 15 to file your actual return.

State income tax important date

Most states that have an income tax use the same April 15 important date as the federal government. However, some states have different dates or different rules. A few states do not have an income tax at all (including Florida, Texas, and Wyoming).

If you live in a state with an income tax, check your state's tax authority website for the exact important date. Some states allow you to file a state extension at the same time you file a federal extension (Form 4868), while others require a separate state extension form. A few states have important date that differ from April 15 — for example, some allow an extra day or two for mail-in returns.

If you move to a different state during the tax year, you may owe taxes to both your old state and your new state. Each state has its own rules about how to handle this. Your tax software or a tax professional can help you understand your obligations.

Frequently Asked Questions

Do I have to file by April 15 if I do not owe taxes?

No. If you do not owe federal income tax, you are not required to file. However, if you had taxes withheld from your paycheck or made estimated tax payments, filing allows you to claim a refund. You have three years from April 15 of the year after the tax year to file and claim that refund.

What if I owe taxes but cannot pay by April 15?

File your return by April 15 anyway. Interest and penalties begin accruing on April 16 on any unpaid balance. The IRS offers payment plans (installment agreements) that let you pay over time. You can set up a plan online at irs.gov or by calling the IRS. Setting up a plan reduces (but does not eliminate) penalties.

Can I file my return before I receive all my tax documents?

You can file, but you may need to amend your return later if a document arrives with different information than you expected. It is safer to wait until you have all documents. If you are in a hurry to file, you can request an extension instead and file later when you have everything.

Does filing an extension protect me from penalties?

An extension protects you from the failure-to-file penalty, but only if you pay any taxes owed by April 15. If you file the extension form but do not pay taxes owed, you still owe interest and the failure-to-pay penalty starting April 16.

What if April 15 is a Saturday?

The important date becomes Monday, April 17. The IRS treats the weekend as part of the extension, so you have until Monday to file and pay. This applies whenever April 15 falls on a Saturday or Sunday.