Tax return day in the United States is April 15, unless that date falls on a weekend or federal holiday

The Internal Revenue Service (IRS) sets the important date for filing your federal income tax return as April 15 of the year following the tax year you're reporting on. If April 15 falls on a Saturday, the important date moves to Monday, April 17. If it falls on a Sunday, the important date moves to Monday, April 16. If April 15 is a federal holiday — which happens rarely — the IRS moves the important date to the next business day.

This important date applies to most individual filers. Some people and businesses have different important date: sole proprietors and partners often file on March 15 if they're using a fiscal year that doesn't match the calendar year, and corporations have their own schedules depending on their structure. State income tax important date may also differ from the federal important date, so you'll need to check your state's requirements separately.

The April 15 important date is a hard stop for filing by mail or electronically. If your return arrives after midnight on April 15, it is considered late, even if you mailed it earlier. Electronic filing has a cutoff time set by the IRS each year, usually around 11:59 p.m. Eastern Time.

Key Takeaways

  • The federal tax return important date is April 15 unless that date falls on a weekend or holiday, in which case it moves to the next business day.
  • Filing electronically is faster and more accurate than mailing a paper return, and the IRS processes e-filed returns more quickly.
  • If you cannot file by April 15, you can request an automatic extension that gives you until October 15, but this extends only the filing important date, not the payment important date.
  • Penalties and interest begin accruing on any taxes owed if you do not pay by April 15, even if you file an extension.
  • State income tax important date may differ from the federal important date and vary by state.

What happens if you file after April 15

Filing after the April 15 important date triggers a failure-to-file penalty from the IRS. This penalty is 5 percent of the unpaid taxes for each month or part of a month that your return is late, up to a maximum of 25 percent. If you owe taxes and did not pay by April 15, you also owe a failure-to-pay penalty of 0.5 percent per month, plus interest on the unpaid amount. Interest compounds daily and the rate changes quarterly — the IRS publishes the current rate on its website.

If you are due a refund, filing late does not trigger penalties, but you will delay receiving your money. The IRS cannot issue a refund until it processes your return, which takes longer for paper returns than electronic ones. If you file more than three years after the original important date, you forfeit the refund entirely.

How to request a filing extension

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) with the IRS. This form must reach the IRS by April 15 — the same important date as your actual return. You can file Form 4868 electronically through tax software, by mail, or by phone in some cases.

An extension moves your filing important date from April 15 to October 15. It does not extend the important date to pay taxes you owe. If you expect to owe money, you should estimate the amount and pay it by April 15 anyway. If you do not pay by April 15 and you owe taxes, you will owe failure-to-pay penalties and interest on the unpaid amount, even though you have until October 15 to file.

If you file Form 4868 and pay at least 90 percent of your total tax liability by April 15, the IRS will not charge you a failure-to-pay penalty on the remaining balance, though you will still owe interest.

State tax return important date

Most states that have an income tax follow the federal April 15 important date. However, some states set different dates. You need to check your specific state's tax authority website to confirm. A few states do not have an income tax at all, so residents of those states file only federal returns.

If you live in one state but work in another, you may need to file returns in both states. Some states have reciprocal agreements that prevent double taxation, but others do not. The state where you earned the income usually has the right to tax it first.

Electronic filing versus mailing your return

The IRS processes electronic returns much faster than paper returns. An e-filed return typically processes within 21 days, while a mailed return can take six to eight weeks or longer. If you are due a refund, electronic filing gets your money to you faster — usually within 21 days if you choose direct deposit to your bank account.

Electronic filing also reduces errors. Tax software checks your return for common mistakes before you submit it, and the IRS rejects returns with certain errors before they enter the system, so you can fix and resubmit them when ready. Paper returns with errors may not be caught until months later, delaying any refund or triggering correspondence from the IRS.

Both electronic and paper returns must be submitted by the April 15 important date. For electronic filing, the cutoff is usually 11:59 p.m. Eastern Time on April 15. For paper returns, the return must be postmarked by April 15 — the date it arrives does not matter, only the postmark date.

What to do if you cannot meet the important date

If you realize you cannot file by April 15, file Form 4868 when ready. Do not wait until April 14 or April 15 — filing early gives you a clear record that you requested an extension on time. You can file the form electronically through tax software, which is the fastest method.

If you owe taxes, estimate what you will owe and pay it by April 15 through the IRS payment system. You can pay online, by phone, or by mail. Paying early, even if you have not finished your return, stops the failure-to-pay penalty from growing while you complete your paperwork.

Keep records of your extension request and any payment you made. If the IRS later questions whether you filed on time, you will need proof that Form 4868 was submitted before the important date.

Frequently Asked Questions

What if April 15 falls on a weekend?

If April 15 is a Saturday, your important date is Monday, April 17. If April 15 is a Sunday, your important date is Monday, April 16. The IRS automatically moves the important date to the next business day so you do not have to file on a weekend.

Can I file my return early?

Yes. You can file your federal return as soon as you have all the documents you need — typically W-2s from employers, 1099s for other income, and records of deductions. Filing early does not trigger any penalties and may get your refund to you sooner if you are due one.

Do I have to file if I did not earn much income?

The IRS sets a minimum income threshold below which you do not have to file. This threshold changes each year and depends on your age, filing status, and type of income. Check the IRS website or use the IRS Interactive Tax Assistant to determine whether you must file.

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

File your return by April 15 anyway and pay whatever you can. The IRS offers payment plans that let you pay the balance over time. You will owe interest and penalties on the unpaid amount, but setting up a payment plan stops additional penalties from accruing and shows the IRS you are making a good-faith effort to pay.

Does filing an extension give me more time to pay taxes?

No. An extension gives you until October 15 to file your return, but taxes are still due by April 15. If you do not pay by April 15, you owe failure-to-pay penalties and interest on the unpaid amount, even if you have an extension.