IRS Late Payment & Filing Penalties

Understanding IRS Late Payment Penalties: Rates, Relief Options, and How to Minimize Them

Missing a tax payment deadline can become costly, but understanding the IRS failure-to-pay penalty—and the steps you can take—helps you limit the impact.

The failure-to-pay penalty applies when you do not pay the full tax owed by the original due date (usually April 15 for individuals). An extension of time to file does not extend the time to pay. The penalty is 0.5% of the unpaid taxes for each month or part of a month the balance remains unpaid, up to a maximum of 25%. Unpaid tax equals the total tax required to be shown on your return minus withholding, estimated payments, and refundable credits.

For example, $8,000 left unpaid for six months would generate a $240 failure-to-pay penalty (0.5% × 6) before interest is added. If the IRS issues a notice of intent to levy and payment is not made within 10 days, the rate increases to 1% per month. Conversely, if you filed on time as an individual and enter an approved installment agreement, the rate drops to 0.25% while the plan is in effect.

Interest accrues separately on unpaid tax (and later on penalties), compounding daily at the federal short-term rate plus 3 percentage points. The failure-to-file penalty is steeper at 5% per month (maximum 25%). When both penalties apply in the same month, the failure-to-file amount is reduced by the failure-to-pay portion for that month.

To minimize costs:

File your return on time even if you cannot pay in full—this avoids the higher failure-to-file penalty.

Pay as much as possible by the due date; partial payments reduce the base on which penalties and interest grow.

Set up an installment agreement through IRS.gov to qualify for the reduced 0.25% rate and ease collection pressure.

Seek relief when eligible. Reasonable cause—such as a natural disaster, serious illness, or inability to obtain records—may allow abatement if you exercised ordinary care (note that lack of funds alone is generally not sufficient). Taxpayers with a strong three-year compliance history may also qualify for administrative relief under First Time Abate or the Automatic Exemption from Penalty (AEP) program that began in summer 2026, which can prevent the penalty from being assessed.

Act quickly. The sooner you address the balance, the less you will ultimately owe.

If you need assistance with any of these matters, please call me, Robert Franko, CPA.

Thank you!