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IRS late filing penalty: What to do if you missed the deadline

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The IRS tax filing deadline for 2025 has passed, but millions of Americans still haven’t filed. If you missed the April 15 deadline, it’s important to act fast to avoid growing penalties and interest.

What happens if you file late?

If you owe taxes and haven’t filed yet, the IRS applies two main penalties:

  • Failure to file penalty: 5% of your unpaid taxes for each month your return is late, up to 25%.
  • Failure to pay penalty: 0.5% per month on the unpaid balance.

Together, these penalties can add up quickly. If you’re more than 60 days late, the minimum failure-to-file penalty is either $485 or 100% of your unpaid tax—whichever is less.

How to reduce or avoid penalties

Even if you can’t pay your full tax bill, filing your return as soon as possible helps avoid the largest penalty. Here are your best options:

  • File now: Use IRS Free File if you qualify or file electronically with tax software.
  • Pay what you can: Partial payments reduce penalty amounts.
  • Set up a payment plan: IRS payment plans prevent aggressive collection actions and additional fees.
  • Request penalty relief: First-time penalty abatement or reasonable cause exceptions may be available.

What if you’re due a refund?

If the IRS owes you money, there’s typically no penalty for filing late. But there is a time limit—you have three years to claim a refund. For 2021 tax year refunds, that deadline is May 17, 2025.

Filing extension vs. late filing

If you requested an extension by April 15, you have until October 15, 2025 to file without late filing penalties. But remember—extensions only apply to filing, not paying.

Interest continues to accrue on any unpaid taxes starting from the April deadline.

Final tips for late filers

  • Don’t wait—penalties grow every month.
  • Check your IRS account for notices and payment status.
  • If you’re confused or overwhelmed, seek help from a tax preparer or contact the IRS directly.

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