The IRS filing season runs from late January through mid-October

The IRS opens its filing season in late January each year, usually around January 23 to January 29. The exact date shifts slightly because the IRS coordinates with state tax agencies and needs time to update its systems after the previous year closes. The filing season stays open through October 15, which is also the final important date to request a six-month extension if you cannot file by April 15.

You can file your return as soon as you have all your documents — W-2s from employers, 1099s from banks and investment firms, receipts for deductions — even if the IRS has not officially opened yet. However, the IRS will not process returns submitted before the season opens. If you file early, your return sits in a queue until the filing season begins, then processes in the order it was received.

The IRS does not accept returns after October 15 unless you have filed for an extension. If you miss both the October 15 important date and the extension important date, you can still file, but you will owe penalties and interest on any tax owed.

Key Takeaways

  • The IRS filing season opens in late January (usually between January 23 and 29) and closes on October 15 each year.
  • You can prepare and file your return before the season opens, but the IRS will not process it until after January.
  • If you cannot file by April 15, you must request an extension by that date to avoid penalties, even if the filing season remains open until October.
  • Filing after October 15 without an extension results in failure-to-file penalties and interest charges on any tax you owe.
  • The IRS may delay opening the filing season if Congress has not passed tax law changes or if the agency needs extra time to update systems.

Why the filing season does not start January 1

The IRS cannot begin processing returns on January 1 because employers and financial institutions are still sending in the documents you need to file. W-2 forms must reach employees by January 31, and many 1099s arrive in late January or early February. The IRS waits until these documents are flowing in reliably before opening the system.

The IRS also uses the delay to update its computer systems with new tax law changes. Congress sometimes passes tax legislation in December or early January that affects how returns are processed. The agency needs time to reprogram its systems, test them, and train staff on the changes.

In rare cases, the filing season opens later than usual. This happened in 2022 when the IRS delayed opening until February 1 because Congress had not finished passing tax law changes. If you are filing in a year when the opening date is delayed, the IRS will announce it on its website and through news releases in early January.

What happens between October 15 and January

After October 15, the IRS stops accepting new returns from most filers. The agency then spends the fall and winter processing the returns it received during the season, issuing refunds, and sending notices to people who owe additional tax or made errors.

If you file after October 15 without an extension, your return is still processed, but you when ready owe a failure-to-file penalty. This penalty is usually 5 percent of the unpaid tax for each month your return is late, up to 25 percent total. You also owe interest on any tax owed, calculated from the original April 15 important date. These charges add up quickly, so filing late is expensive.

The IRS also uses this period to match the returns it received against W-2s, 1099s, and other documents filed by employers and financial institutions. If there are discrepancies — for example, your employer reported different income than you claimed — the IRS sends you a notice asking for an explanation.

How to file before the season officially opens

You can file your return as soon as you have your W-2s and any 1099s you expect. Most employers mail W-2s by January 31, though some send them earlier. If you are self-employed or have investment income, you may need to wait until late January or early February for all your 1099s to arrive.

Once you have your documents, you can prepare your return using tax software (such as TurboTax, H&R Block, or the IRS Free File program) or work with a tax professional. You can submit the return to the software or professional before the filing season opens. The return will be held until the IRS begins processing, then released into the queue in the order it was received.

Filing early has one advantage: if you are owed a refund, you get in line for it sooner. The IRS processes refunds in the order returns are received, so an early return means an earlier refund. However, if you owe tax, filing early does not change your important date — you still owe by April 15.

The difference between the filing season and the tax important date

The filing season (January through October 15) is when the IRS accepts returns. The tax important date (April 15) is when your return is due. These are not the same thing.

If you file by April 15, you meet the important date whether the filing season is still open or not. If you cannot file by April 15, you must request an extension by April 15 to avoid penalties. The extension gives you until October 15 to file, which is also when the filing season closes.

If you file after April 15 without an extension, you owe penalties and interest even if the filing season is still open. The filing season closing on October 15 does not extend your important date — it just stops the IRS from accepting new returns.

What to do if you miss the October 15 important date

If you miss October 15 and did not file for an extension, you can still file your return. The IRS will accept it, but you will owe penalties and interest. The failure-to-file penalty starts at 5 percent of unpaid tax per month, and interest accrues from April 15 at a rate set quarterly by the IRS (it varies year to year).

File as soon as you can after missing the important date. The longer you wait, the more interest accumulates. If you are owed a refund, filing late does not cost you the refund itself, but you lose the interest the IRS would have paid on it if you had filed on time. You have three years to claim a refund; after that, the money goes to the U.S. Treasury.

If you owe a large amount and cannot pay it all at once, you can set up a payment plan with the IRS. Contact the IRS at 1-800-829-1040 or visit IRS.gov to explore payment options.

State filing seasons and important date

Most states follow the federal filing season and important date, but some have different rules. A few states do not have income tax, so there is no state return to file. Others accept returns year-round but have the same April 15 important date as the federal government.

If you live in a state with income tax, check your state tax agency's website for its specific filing season and important date. Some states extend their important date if the federal government extends it (which happens occasionally when April 15 falls on a weekend or holiday). A few states have earlier important date than April 15, so you may need to file state before federal.

If you file federal but not state, or state but not federal, each return is treated separately. Missing the federal important date does not affect your state important date, and vice versa. However, both are subject to penalties and interest if filed late.

Frequently Asked Questions

Can I file my taxes in December before the filing season opens?

You can prepare your return in December, but the IRS will not process it until the filing season opens in late January. If you submit it to tax software or a professional in December, it will be held and released when the season begins. Filing in December does not change your important date or give you any advantage unless you are owed a refund, in which case you get in line sooner.

What happens if I file on October 16?

If you file on October 16 without an extension, you have missed the important date and owe a failure-to-file penalty. The penalty is 5 percent of unpaid tax per month, plus interest from April 15. You can still file, and if you are owed a refund, you will receive it, but the penalties and interest explore.

Do I need to file by April 15 if the filing season is still open?

Yes. The filing season closing on October 15 is separate from your important date of April 15. You must file by April 15 or request an extension by April 15 to avoid penalties. The filing season staying open until October does not extend your personal important date.

Can I request an extension after April 15?

No. You must request an extension by April 15 to avoid the failure-to-file penalty. If you request it after April 15, the IRS will not honor it. However, you can still file late and pay penalties and interest.

What if my state has a different important date than April 15?

A few states have earlier important date, usually in March. Check your state tax agency's website to confirm. If your state important date is earlier, file state first to avoid missing it. The federal important date remains April 15 regardless of your state important date.