The IRS charges two separate penalties when you file after the deadline

If you miss the tax filing deadline, the IRS charges a failure-to-file penalty and a failure-to-pay penalty if you owe money. The failure-to-file penalty is typically 5% of the unpaid tax for each month or part of a month your return is late, up to 25% total. The failure-to-pay penalty is 0.5% of your unpaid tax per month, also capping at 25%. If you file late but paid your taxes on time through withholding or estimated payments, you only face the failure-to-file penalty.

Both penalties accrue monthly until you file or reach the maximum. Interest also compounds daily on any unpaid tax, starting from the original deadline. The longer you wait, the more you owe in penalties and interest combined. If you are owed a refund, there is no penalty for filing late — you simply receive your refund later than you would have otherwise.

Key Takeaways

  • The failure-to-file penalty is 5% per month of unpaid tax, capped at 25% total.
  • The failure-to-pay penalty is 0.5% per month of unpaid tax, capped at 25% total.
  • Interest accrues daily on unpaid tax from the original deadline, separate from penalties.
  • If you are owed a refund, filing late carries no penalty, though you receive your money later.
  • Filing even one day after the deadline triggers penalties if you owe tax.

How the failure-to-file penalty works

The failure-to-file penalty starts accruing the day after your return is due. For most people, that is April 16 in 2024 (the deadline shifted one day because April 15 fell on a Sunday). The penalty is 5% of your unpaid tax for each month or partial month you do not file, meaning even a few days late counts as one full month.

The penalty stops accruing once you file your return, regardless of whether you pay the tax owed. If you file 10 months late, you owe 50% of your unpaid tax in failure-to-file penalties — but the cap is 25%, so you never pay more than that portion. If the IRS files a substitute return on your behalf (which happens if you do not file for several years), the penalty continues to accrue until you file your own return.

How the failure-to-pay penalty works

The failure-to-pay penalty applies only if you owe tax when you file. It is 0.5% of your unpaid tax per month, also capped at 25% total. This penalty accrues from the original deadline — April 15 for most filers — not from the date you file your return.

The failure-to-pay penalty continues accruing even after you file, as long as the tax remains unpaid. If you file on time but do not pay until six months later, you owe 3% in failure-to-pay penalties (0.5% × 6 months). The IRS may also place a tax lien on your property if you do not pay within 10 days of receiving a notice, which affects your credit and your ability to sell or refinance property.

Interest charges on top of penalties

Interest is separate from penalties and is calculated daily. The IRS sets the interest rate quarterly; it is currently around 8% per year, though it changes. Interest accrues from the original deadline until you pay in full, compounding daily.

For example, if you owe $5,000 in tax and file one year late, you would owe approximately $1,250 in failure-to-file penalties (25% cap), $250 in failure-to-pay penalties (25% cap), and roughly $400 in interest — totaling about $1,900 in penalties and interest on top of the original $5,000 tax bill. The exact interest amount depends on when you pay and the IRS interest rate during that period.

When the IRS may reduce or remove penalties

The IRS has authority to reduce penalties if you have reasonable cause — meaning you made an honest mistake or faced circumstances beyond your control. Common reasons the IRS accepts include serious illness, death in the family, a natural disaster, or relying on incorrect advice from a tax professional. You must request penalty relief in writing, usually by filing Form 843 (Claim for Refund and Request for Abatement) or by calling the IRS.

If you have a history of filing on time and paying on time, the IRS is more likely to grant relief. First-time penalties are also viewed more favorably than repeated violations. However, simply forgetting the deadline or not understanding the rules does not typically may have access to as reasonable cause. You must provide documentation — a doctor's note for illness, a death certificate, proof of the natural disaster — to support your claim.

Filing late when you are owed a refund

If you overpaid tax through withholding or estimated payments, you face no penalty for filing late. The IRS will still process your return and send your refund, but there is a time limit. You generally have three years from the original deadline to claim a refund; if you file after that window, you forfeit the money.

For example, if your 2021 return was due April 18, 2022, and you file on April 20, 2025, you are within the three-year window and will receive your refund. If you file on April 21, 2025, you have missed the deadline and cannot claim that refund. Filing as soon as possible protects your right to the money, even though there is no penalty.

What to do if you have not filed in multiple years

If you have missed returns for several years, the penalties and interest compound significantly. However, filing those returns now stops the accrual of new penalties. The IRS also has a statute of limitations — generally three years to assess tax, six years if you underreported income by 25% or more, and no limit if you did not file at all.

The IRS may contact you first through notices and letters. If you receive a notice, respond promptly or contact a tax professional or the IRS directly to discuss payment options. The IRS offers installment agreements and currently-not-collectible status (which temporarily pauses collection while you face hardship). Filing your returns, even years late, is the first step toward resolving the situation and stopping additional penalties from accruing.

Frequently Asked Questions

Do I owe penalties if I file late but do not owe any tax?

No. The failure-to-file penalty only applies if you owe tax. If your withholding or payments covered your tax liability, you face no penalty for filing late. You may still want to file promptly to claim any refund within the three-year window.

Can I get an extension to avoid the late-filing penalty?

An extension moves the filing deadline to October 15, but it does not extend the payment deadline. If you owe tax, you must pay by April 15 or face failure-to-pay penalties. An extension only prevents the failure-to-file penalty if you file by October 15.

What if I cannot pay the full amount I owe?

You can still file your return and set up a payment plan with the IRS. The failure-to-pay penalty continues accruing until the tax is paid in full, but filing stops the failure-to-file penalty from growing. The IRS offers monthly installment agreements and may accept partial payments.

How long does the IRS have to collect unpaid tax?

The IRS generally has 10 years from the date it assesses the tax to collect it. This is called the statute of limitations on collection. After 10 years, the IRS must stop collection efforts, though there are narrow exceptions that can extend this period.

Will filing late affect my credit score?

Filing late itself does not appear on your credit report. However, if the IRS places a tax lien on your property for unpaid tax, that lien may appear on your credit report and harm your score. Paying the tax or setting up a payment plan can lead to the lien being released.