The IRS typically opens its filing season in late January

For the 2024 tax year, the IRS began accepting returns on January 29, 2025. This date marks when the agency's systems are ready to receive and process returns filed electronically or by mail. The exact start date shifts slightly each year depending on IRS readiness and system testing.

Filing before the season officially opens does not help you. If you submit a return before January 29, the IRS will reject it, and you will have to file again once the season starts. Many tax software programs let you prepare your return early, but they hold it and transmit it automatically once the IRS begins accepting.

The filing deadline itself — when your return must reach the IRS — is April 15, 2025. That is a separate date from when filing season opens. You have over two months to file once the season begins.

Key Takeaways

  • The IRS began accepting 2024 tax returns on January 29, 2025, and will continue through April 15, 2025.
  • Filing before the season opens results in rejection; your return will not be processed until after January 29.
  • The IRS processes returns in the order they are received, so filing early in the season does not speed up your refund.
  • If you owe taxes rather than receiving a refund, filing early can reduce penalties and interest that accrue on unpaid amounts.

Why the IRS does not accept returns before late January

The IRS needs time to update its systems with new tax law changes, forms, and procedures for each year. The agency also coordinates with employers and financial institutions to ensure W-2s, 1099s, and other documents are ready. Accepting returns before these documents are in the system creates problems: the IRS cannot match your reported income to what employers reported, which triggers audits and delays.

Testing the filing systems takes weeks. The IRS runs parallel systems to catch errors before they affect millions of returns. This testing period is why the start date is rarely before late January.

What happens if you file before the season opens

If you file electronically before January 29, your return is rejected at the point of transmission. You will receive an error message from your tax software or tax preparer. The return never reaches the IRS system.

If you mail a paper return before the season opens, it will sit in the IRS mailroom. Once the season officially opens, it enters the processing queue like any other mailed return. Mailed returns take longer to process than electronic ones — typically 21 days or more, compared to 21 days or fewer for e-filed returns.

How the IRS processes returns once filing season opens

The IRS does not process all returns at once. Returns are handled in batches throughout the filing season. The order is roughly first-in, first-out, but the IRS also prioritizes returns that are simple and error-free. A return with missing information or math errors goes to the back of the queue while it is reviewed.

Refunds are issued in the order returns are processed, not in the order they were filed. If you file on January 29 but your return has errors, someone who filed on February 15 with a clean return may receive their refund first. The IRS estimates most refunds are issued within 21 days of acceptance, but this varies based on the complexity of your return and the volume of returns being processed.

Filing early in the season versus waiting

Filing as soon as the season opens does not may provide a faster refund. The IRS processes returns continuously, and the backlog is smallest in early February. By mid-March, the volume increases significantly, which can slow processing. However, the difference in refund timing between filing on January 29 and filing on March 1 is usually only a few days.

If you expect to owe taxes, filing early is more important. The longer you wait to file, the more interest and penalties accumulate on the amount you owe. Interest accrues from the original due date (April 15) regardless of when you file, but penalties for late filing are calculated from the filing date. Filing early reduces the penalty period.

Documents you need before the season opens

Gather your income documents before January 29 so you can file immediately once the season starts. You will need your W-2 from each employer, 1099 forms for self-employment or investment income, mortgage interest statements (Form 1098), and records of any deductions you plan to claim.

Employers are required to send W-2s by January 31. If you have not received yours by early February, contact your employer. The IRS does not have your W-2 data until employers submit it, which happens in batches throughout January and early February. If you file before your employer's W-2 reaches the IRS, your return may be flagged for review later.

What to do if you need an extension

If you cannot file by April 15, you can request an automatic extension that moves your deadline to October 15. Filing an extension does not extend the deadline to pay taxes you owe — you still owe payment by April 15, or interest and penalties begin accruing. An extension only gives you more time to file the return itself.

To request an extension, file Form 4868 (Application for Automatic Extension of Time to File U.S. Individual Income Tax Return) before April 15. You can file this form electronically through tax software, by mail, or through a tax preparer. The extension is automatic once the form is received; you do not need approval from the IRS.

Frequently Asked Questions

Can I file my 2024 return before January 29?

No. The IRS will reject any return submitted before the filing season officially opens on January 29, 2025. Tax software may let you prepare your return early, but it will not transmit it until after that date. If you mail a paper return early, it will not be processed until the season opens.

Does filing on January 29 get me a faster refund?

Not necessarily. The IRS processes returns in batches, and filing early does not move you to the front of the line. Refund timing depends more on whether your return is error-free and straightforward. A simple return filed in February may be processed faster than a complex one filed on January 29.

What if I owe taxes instead of getting a refund?

File as soon as the season opens. Interest and penalties on unpaid taxes begin accruing on April 15 regardless of when you file, but the penalty for late filing is calculated from your filing date. Filing early reduces the penalty amount you owe.

When will I receive my refund?

The IRS estimates 21 days for most refunds once your return is accepted. However, this varies based on return complexity and processing volume. You can track your refund status using the IRS Where's My Refund tool on IRS.gov after your return is accepted.

What if I have not received my W-2 by the time filing season opens?

Contact your employer. Employers must send W-2s by January 31. If you file before your employer submits the W-2 to the IRS, your return may be flagged for review later. It is better to wait a few days for the W-2 than to file without it and face a mismatch.