The IRS filing season for 2025 tax returns opens January 24, 2025

The Internal Revenue Service begins accepting 2025 tax returns on January 24, 2025. This is the official start date when the IRS systems are ready to receive returns, whether you file electronically or by mail. The date shifts slightly each year depending on IRS processing schedules and the time needed to update systems for new tax law changes.

You can file before January 24, but the IRS will not process your return until that date. If you file electronically on January 20, for example, your return sits in the IRS queue and begins processing on January 24. Filing early does not speed up processing — it straightforward means your return waits longer in the system. The only advantage to filing early is psychological: you know it is done.

If you mail a paper return before January 24, the post office will deliver it, but the IRS will not open it or begin processing until after that date. Paper returns take longer to process overall, so mailing early does not compensate for the slower method.

Key Takeaways

  • The IRS begins processing 2025 returns on January 24, 2025, regardless of when you file before that date.
  • Filing electronically is faster than mailing a paper return; the IRS typically processes e-filed returns within 21 days if there are no errors.
  • The filing important date for 2025 taxes is April 15, 2026, and returns postmarked by that date are considered timely even if they arrive later.
  • If you owe taxes, filing and paying by April 15, 2026 avoids penalties and interest; if you are owed a refund, there is no penalty for filing late, but you lose the refund after three years.
  • The IRS may delay the opening date if Congress passes new tax legislation close to the start of filing season.

Why the IRS does not open earlier

The IRS needs time after December 31 to update its systems for new tax rules, forms, and withholding tables that take effect each year. Tax law changes, inflation adjustments to tax brackets, and updates to the standard deduction all require the IRS to reprogram its computers and test them before accepting millions of returns.

Congress sometimes passes tax legislation in December or early January. When that happens, the IRS may delay the opening date to reprogram systems again. In 2024, for example, Congress passed the find 2.0 Act in late December 2023, which affected retirement account rules. The IRS delayed the 2024 filing season opening to accommodate those changes.

The IRS also uses the weeks before filing season to train staff, set up phone lines, and prepare for the surge in returns. Opening too early would mean processing returns under incomplete or untested systems, which leads to errors and delays.

When you must file by to avoid penalties

The important date to file your 2025 tax return is April 15, 2026. This is a hard important date set by law. If you owe taxes and do not file by this date, you face a failure-to-file penalty of 5% of the unpaid tax for each month (or part of a month) that the return is late, up to 25% total.

If you cannot file by April 15, you can request an automatic extension from the IRS. Filing Form 4868 (process for Automatic Extension of Time To File U.S. Individual Income Tax Return) gives you until October 15, 2026 to file. The extension is automatic — you do not need IRS approval — but it only extends the time to file, not the time to pay. If you owe taxes, you must pay by April 15 or face interest and penalties on the unpaid amount.

If you are owed a refund, there is no penalty for filing late. However, the IRS keeps unclaimed refunds for only three years. If you do not file by April 15, 2029 (three years after the April 15, 2026 important date), you lose the refund permanently.

How long processing takes after you file

The IRS publishes a target of 21 days for processing electronically filed returns with no errors. In practice, processing times vary widely depending on the complexity of your return and the volume of returns the IRS is handling at that moment. Early in filing season (late January through February), processing is usually faster. By April, when millions of returns arrive at once, processing slows.

If your return contains errors — a missing signature, a mismatched Social Security number, or income reported on a form that does not match what your employer or bank reported to the IRS — processing stops. The IRS sends you a notice by mail asking you to correct the error. This adds weeks or months to the process.

Paper returns take much longer. The IRS must open the envelope, scan the documents, and enter the data by hand. Paper returns typically take 4 to 6 weeks to process, and errors take even longer to resolve.

What happens if you file before January 24

Filing before January 24 does not harm you, but it does not help you either. Your return will sit unprocessed until January 24, then enter the processing queue with all the other returns filed that day. You will not receive your refund any faster.

The one exception is if you are using tax software that allows you to file directly to the IRS. Some tax software companies let you prepare your return in December and submit it to their system, which then transmits it to the IRS on January 24 automatically. This is convenient if you want to be done with taxes before the new year, but the refund timeline is the same as if you filed on January 24 manually.

If you file before January 24 and then discover an error, you can file an amended return (Form 1040-X) after the IRS processes your original return. Amending before the original is processed is not possible — the IRS will not accept an amended return for a return it has not yet received.

When the IRS stops accepting returns for 2025

The IRS stops accepting 2025 returns on April 15, 2026. After that date, any return you file is considered late, even if you have a valid reason for the delay. The only exception is if you filed Form 4868 before April 15 to request an extension; then you have until October 15, 2026.

If you miss the April 15 important date and did not file an extension, you can still file your return after April 15, but you will owe failure-to-file penalties and interest on any taxes owed. The penalty is 5% per month up to 25%, plus interest that compounds daily.

If you are owed a refund and file after April 15, 2026 but before April 15, 2029, you will still receive your refund. The IRS will process your late return and send the refund to you. After April 15, 2029, the refund is forfeited — the IRS keeps it.

State filing important date and extensions

Most states follow the federal important date of April 15, but some states have different dates or do not have an income tax at all. If you live in a state with income tax, check your state tax agency website for the exact important date. Some states allow you to file a federal extension (Form 4868) and automatically extend your state important date as well. Others require a separate state extension form.

Nine states have no income tax: Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington, Wyoming, and New Hampshire (which taxes only interest and dividends, and is phasing that out). If you live in one of these states, you only need to worry about the federal important date.

Frequently Asked Questions

Can I file my 2025 return in December 2024?

You can prepare your return in December, but the IRS will not process it until January 24, 2025 at the earliest. Some tax software lets you submit it to their system in December, and they transmit it to the IRS on January 24 automatically. Filing early does not speed up your refund.

What if I file on April 14, 2026 and the IRS receives it on April 16?

The postmark date matters, not the date the IRS receives it. If your return is postmarked on or before April 15, 2026, it is considered timely. Mail your return early enough that it arrives by mid-April to be safe, or file electronically to avoid mail delays.

Do I have to file by January 24, 2025 to get a refund?

No. You can file anytime between January 24, 2025 and April 15, 2026. If you are owed a refund, there is no penalty for filing late. The only important date that matters for refunds is April 15, 2029 — after that, unclaimed refunds are forfeited.

What if Congress passes a new tax law in January 2025?

If Congress passes significant tax legislation after the IRS has announced the January 24 opening date, the IRS may delay the opening to reprogram its systems. The IRS will announce any delay on its website and through press releases. Check IRS.gov in early January if you are concerned about delays.

Can I file my 2025 return if I have not received my W-2 yet?

You can file once you have all the documents you need to report your income accurately. If your employer has not sent your W-2 by late January, contact them. Employers must send W-2s by January 31. If you file without a W-2 and the amounts do not match what your employer reports to the IRS, you will receive a notice asking you to correct the error.