The IRS failure to file penalty is 5% of your unpaid tax for each month or part of a month your return is late, up to a maximum of 25%. It only applies when you owe tax and don’t submit your return by the original due date or an approved extension date.1Internal Revenue Service. Failure to File Penalty If you’re due a refund, the penalty works out to zero. If you owe, the charge grows fast, but the IRS offers real paths to reduce or remove it.
How the Penalty Is Calculated
The starting figure is whatever tax you still owe after subtracting withholding, estimated payments, and refundable credits. The IRS charges 5% of that unpaid amount for the first month your return is late, then another 5% for each additional month it stays unfiled.2Office of the Law Revision Counsel. 26 USC 6651 – Failure to File Tax Return or to Pay Tax A partial month counts as a full month. File one day into a new month and you owe the full 5% for that month.1Internal Revenue Service. Failure to File Penalty
An example: you owe $4,000 and file three months late. The penalty is $200 per month, totaling $600. Filing two days into that third month gets you the same $600, because the partial month rounds up.
The 25% Cap and the 60-Day Minimum
The penalty stops growing at 25% of your unpaid tax, which you hit after five months.1Internal Revenue Service. Failure to File Penalty After that, the failure-to-file penalty is frozen, but the separate failure-to-pay penalty and interest keep running.
If your return is more than 60 days late, a minimum penalty applies. For returns due in 2026, that minimum is $525 or 100% of the unpaid tax, whichever is smaller.3Internal Revenue Service. Topic No. 653, IRS Notices and Bills, Penalties and Interest Charges So if you owe $300 and file four months late, the penalty is $300 (100% of the tax). If you owe $2,000 and file 65 days late, you’ll face at least $525. The minimum adjusts periodically for inflation; it was $485 for returns due in 2024 and 2025.1Internal Revenue Service. Failure to File Penalty
When You Owe Nothing, You Owe No Penalty
Because the penalty is a percentage of unpaid tax, it’s zero if your withholding and credits cover your full liability or you’re due a refund.1Internal Revenue Service. Failure to File Penalty Filing late in that situation costs nothing.
File anyway. You generally have only three years from the original due date to claim a refund, and after that the money is gone.4Internal Revenue Service. Time You Can Claim a Credit or Refund
How Extensions Change the Clock
Filing Form 4868, or paying online and selecting the extension option, moves your filing deadline to October 15. The failure-to-file clock doesn’t start until that extended date passes.5Internal Revenue Service. Get an Extension to File Your Tax Return
Here’s where people get caught: an extension to file is not an extension to pay. The IRS still expects the tax by the original April deadline.6Internal Revenue Service. IRS Reminds Taxpayers an Extension to File Is Not an Extension to Pay Taxes File an extension without paying and you’ll dodge the failure-to-file penalty, but the failure-to-pay penalty (0.5% per month) and interest start accruing right away.
When Both Penalties Apply
If you neither file nor pay, both penalties run at once. The IRS doesn’t stack them at full rate. During any month both apply, the failure-to-file penalty is reduced by the failure-to-pay amount, so it becomes 4.5% and the combined charge stays at 5% per month.7Internal Revenue Service. Failure to Pay Penalty
The failure-to-file penalty caps at 25% after five months. The failure-to-pay penalty keeps going at 0.5% per month until the tax is paid or it reaches its own 25% ceiling.1Internal Revenue Service. Failure to File Penalty A taxpayer who never files and never pays could face a combined 47.5% in penalties alone (22.5% for filing plus 25% for paying), plus interest. That’s why the standard advice holds: file the return even if you can’t pay. It cuts your monthly rate from 5% to 0.5%.
Interest Runs Separately
Interest is a separate charge from penalties. The IRS charges interest on unpaid tax, and on the penalties themselves, starting the day after the filing deadline. The rate is set quarterly against the federal short-term rate. For the first quarter of 2026 it’s 7% per year, compounded daily; starting April 1, 2026, the rate drops to 6% for individual underpayments.8Internal Revenue Service. Internal Revenue Bulletin 2026-08 Penalties cap out. Interest compounds indefinitely until the balance is paid, and on a large unpaid amount it can eventually outpace the penalties.
Fraudulent Failure to File
If the IRS determines the failure to file was a deliberate attempt to evade tax, the rate triples. Instead of 5% per month, it’s 15%, and the maximum climbs from 25% to 75% of the unpaid tax.2Office of the Law Revision Counsel. 26 USC 6651 – Failure to File Tax Return or to Pay Tax The full 75% is reached in the same five months, just at triple the monthly cost.
The enhanced penalty isn’t applied lightly. In Tax Court fraud cases, the government carries the burden of proving intent to evade.9Office of the Law Revision Counsel. 26 USC 7454 – Burden of Proof in Fraud, Foundation Manager, and Transferee Cases Missed deadlines, confusion, and sloppy records don’t count. The IRS looks for deliberate patterns like hiding income, keeping two sets of books, or filing under false Social Security numbers.
How to Get the Penalty Removed
Two paths lead to relief, and most taxpayers don’t know the first one exists.
First-Time Abate
This administrative waiver can wipe out the failure-to-file penalty entirely. You qualify if you meet three conditions: you filed the same type of return for the three tax years before the penalty year with no penalties (or any prior penalties were removed for a reason other than First-Time Abate); you’ve filed all currently required returns or valid extensions; and you’ve paid the tax you owe or arranged to pay it.
The relief covers failure-to-file, failure-to-pay, and failure-to-deposit penalties. It does not apply to estimated tax penalties or returns with event-based filing requirements.10Internal Revenue Service. Administrative Penalty Relief If you’ve been generally compliant and slipped up once, this is the fastest route.
Reasonable Cause
Even without First-Time Abate, the IRS can remove the penalty if you show reasonable cause: circumstances beyond your control prevented timely filing and you weren’t willfully ignoring the deadline.2Office of the Law Revision Counsel. 26 USC 6651 – Failure to File Tax Return or to Pay Tax Categories the IRS recognizes include:
- Fires, natural disasters, or civil disturbances that destroyed records or displaced you
- Inability to obtain necessary records despite your efforts
- Your serious illness or incapacitation, or the death or serious illness of an immediate family member
- Technical failures that prevented timely electronic filing or payment
Each request is judged on its facts.11Internal Revenue Service. Penalty Relief for Reasonable Cause “I forgot” or “I was too busy” won’t work. Expect to provide documentation, such as hospital records, a fire department report, or proof that your tax preparer died.
Making the Request
If you’ve received a penalty notice, it will include instructions for disputing the charge. Many requests, including First-Time Abate, can be handled by calling the number on the notice. Have the notice, the specific penalty you want removed, and your reasons ready before you call.12Internal Revenue Service. Penalty Relief
If a phone call doesn’t resolve it, file Form 843 (Claim for Refund and Request for Abatement) in writing. Explain in detail why the penalty should be removed and attach supporting documentation, with your name and taxpayer identification number on every page.13IRS. Instructions for Form 843 The IRS responds by mail, so allow several weeks.