Tax filing season runs from late January through mid-April in most years

The IRS opens its filing season in late January — usually around January 27 or 28 — and the deadline to file your federal return is April 15. This window gives you about 2.5 months to gather documents, complete your return, and send it in. If April 15 falls on a weekend or holiday, the deadline moves to the next business day.

State tax deadlines usually match the federal deadline, though a few states have different dates. You can file before January 27, but the IRS won't process your return until the season officially opens. Filing early means you may wait weeks for a refund, even if your return is complete and correct.

If you need more time, you can request an extension by filing Form 4868 before April 15. An extension gives you until October 15 to file, but it does not extend the deadline to pay taxes owed — you still owe payment by April 15 to avoid penalties and interest.

Key Takeaways

  • The IRS filing season opens in late January (usually around January 27) and closes April 15, giving you roughly 2.5 months to file.
  • You can file before January 27, but the IRS will not process your return until the season officially opens, which may delay your refund.
  • If you file Form 4868 before April 15, you get until October 15 to submit your return, though taxes owed are still due by April 15.
  • State tax deadlines usually match the federal deadline, though you should check your state's specific date.
  • If April 15 falls on a weekend or holiday, the deadline automatically moves to the next business day.

Why the IRS waits until late January to open

The IRS does not open filing season until late January because employers, banks, and other institutions need time to send you the documents you need to file. Your employer must send your W-2 by January 31, and financial institutions must send 1099 forms (for interest, dividends, or other income) by the same date. The IRS opens a few days before January 31 to give you time to receive these forms and start filing.

If you file before you have all your documents, you may have to file an amended return later if the numbers change. Filing after you receive all your forms means your return is more likely to be correct the first time.

What happens if you miss the April 15 deadline

If you do not file by April 15 and do not have an extension, you face a failure-to-file penalty. The penalty is usually 5 percent of the taxes you owe for each month your return is late, up to 25 percent total. You also owe interest on any unpaid taxes from April 15 onward, compounded daily.

If you owe taxes and do not pay by April 15, a separate failure-to-pay penalty applies — usually 0.5 percent per month, up to 25 percent. The penalties and interest add up quickly, so filing late costs money even if you eventually file.

If you are owed a refund and you file late, there is no penalty, but you lose the refund if you wait more than three years to file. The IRS keeps unclaimed refunds after three years.

How to file before the deadline

You have several options to file before April 15. You can file online using tax software, file by mail, or work with a tax preparer. Online filing is the fastest — most returns are processed within 21 days if you file electronically and request direct deposit. Paper returns take much longer, sometimes 4 to 6 weeks or more.

If you use a tax preparer or software, start gathering documents as soon as you receive them in January. Do not wait until early April when preparers are busiest and appointments are hard to find. Many preparers book up in March and April and may not have availability.

State tax filing deadlines

Most states follow the federal April 15 deadline. However, a few states have different dates or do not have an income tax at all. Some states, like Massachusetts, have a different deadline for certain types of returns. Check your state's tax agency website to confirm the exact date for your situation.

If you live in one state but work in another, you may need to file in both states. The rules depend on where you earned income and where you lived during the year. Your tax preparer or state tax agency can tell you which returns you need to file.

Extensions and what they cover

An extension gives you until October 15 to file your return, but it does not give you extra time to pay. If you owe taxes, you must pay by April 15 or face penalties and interest on the unpaid amount. An extension only delays when you have to submit your return, not when you have to pay.

To request an extension, file Form 4868 with the IRS before April 15. You can file this form electronically, by mail, or through a tax preparer. Filing the extension form takes just a few minutes and costs nothing.

If you file an extension and later discover you owe more taxes than you paid by April 15, you owe interest and possibly penalties on the additional amount from April 15 onward. Pay as much as you can by April 15, even if you are not sure of the exact amount.

Frequently Asked Questions

Can I file my taxes before January 27?

Yes, you can file before the season opens, but the IRS will not process your return until late January. If you file in early January, your refund may not arrive until mid-February or later, even though your return is complete. It is usually better to wait until the season opens so your return processes right away.

What if I do not have all my documents by April 15?

If you are missing a W-2 or 1099, you can file without it and amend your return later when you receive it. However, this creates extra work and delays your refund. Contact the employer or institution that owes you the document — they are required to send it by January 31, and you can request a copy if you do not receive it.

Do I have to pay taxes by April 15 if I file an extension?

Yes. An extension only delays when you file your return, not when you pay. Taxes owed are due April 15 regardless of whether you file an extension. If you do not pay by April 15, you owe interest and penalties on the unpaid amount, even if you file your return by October 15.

What if April 15 is a Saturday or Sunday?

The deadline automatically moves to the next business day. If April 15 is a Saturday, the deadline becomes Monday, April 17. If it is a Sunday, the deadline becomes Monday, April 16. Check the IRS website each year to confirm the exact deadline date.

Can I file my state taxes after the federal deadline?

Most states have the same April 15 deadline as the federal government. A few states have different dates, so check your state's tax agency website. If you file a federal extension, most states allow you to file by October 15 as well, though you should confirm with your state.