Key takeaways
- The failure-to-file penalty is 5% of the tax due per month, up to 25%, and is far steeper than the 0.5% per month failure-to-pay penalty.
- Filing on time matters most: even with no money to pay, filing stops the 5% penalty and leaves only the 0.5% charge plus interest.
- Interest on unpaid tax runs from the original due date, is set quarterly at the federal short-term rate plus 3%, and compounds daily.
- If you are owed a refund, there is usually no late-filing penalty, but you typically have three years to claim it.
- An approved IRS payment plan for an on-time individual filer cuts the failure-to-pay penalty to 0.25% per month.
Every April, plenty of households miss the tax deadline, and the question that follows is usually the same one: how much will this cost? The answer depends on two things the IRS treats separately, filing your return and paying what you owe. Each carries its own penalty, and interest runs on any unpaid balance the whole time. Here is how the pieces fit together, with the numbers, along with what changes if the IRS owes you instead.
What Is the Difference Between Filing Late and Paying Late?
Filing and paying are two separate duties, and missing each one triggers a different charge. The failure-to-file penalty applies when you do not submit your return by the due date, including any extension you requested. The failure-to-pay penalty applies when you file but leave the tax unpaid past the deadline. For most people, the deadline for both is April 15. The filing penalty is far steeper, which is why filing on time matters more than paying on time if you can manage only one.
| Penalty | Rate | Maximum |
|---|---|---|
| Failure to file | 5% of the tax due each month, with any partial month counted as full | 25%, reached after five months |
| Failure to pay | 0.5% of the outstanding tax each month, with partial months counted | 25% |
What Is the Failure-to-File Penalty?
The failure-to-file penalty runs at 5% of the tax due for every month, or fraction of a month, that your return is late, and it stops growing at a maximum of 25%. The percentage applies to the total tax your return shows, minus any tax already paid on time through withholding or estimated payments. The penalty does not apply if you can show the lateness was due to reasonable cause.
There is also a floor. Once a return is over 60 days past due, the charge cannot fall below the smaller of $525 (for returns required to be filed in 2026) or the full amount of tax owed. The filing penalty stops growing after five months, when it reaches the 25% cap, but interest and the payment penalty can keep adding to the total.
Money tip: If you can do only one thing by the deadline, file the return. Filing stops the 5% failure-to-file penalty, the fastest-growing charge, and leaves only the smaller 0.5% failure-to-pay penalty running.
What Is the Failure-to-Pay Penalty?
The failure-to-pay penalty runs at 0.5% of your outstanding tax every month, counting any fraction of a month, until the balance is settled or the charge reaches 25%. A few adjustments to that rate matter:
- It rises to 1% per month if the tax stays unpaid 10 days after the IRS sends a notice of intent to levy property.
- It drops to 0.25% per month for an individual who filed on time and has an approved IRS payment plan in effect.
- A full month’s charge applies even if you pay the balance before the month ends.
When you send money, the IRS credits it against the tax first, penalties next, and interest last. Because the penalties and interest are figured on the unpaid balance, every partial payment shrinks the base they grow from.
How Does Interest on Unpaid Tax Work?
Interest starts running on any tax you have not paid from the original return due date, extensions ignored, and it continues until you pay in full. The rate is set quarterly and equals the federal short-term rate plus 3%, and it compounds daily. As an example, the rate was 7% per year for the second quarter of 2025. The IRS also charges interest on the penalties themselves, which adds to what you owe until the entire balance is settled. Interest is one reason a tax bill left alone grows faster than many people expect.
What Happens if Both Penalties Apply?
When the two charges land in the same month, the filing penalty is trimmed by whatever the payment penalty amounts to for that month. In practice, a month carries a 4.5% filing charge and a 0.5% payment charge, rather than 5% plus 0.5%. Together they can climb to a combined 47.5% of the unpaid tax: 22.5% from filing late over five months, plus 25% from never paying. After the filing penalty maxes out, the payment penalty and interest continue to accrue until the balance is gone.
What if You’re Owed a Refund Instead?
There is usually no penalty for filing late when the IRS owes you money. The penalties are percentages of tax you failed to pay, so a return showing a refund produces no filing or payment charge. Filing promptly still makes sense, because a refund is not held open indefinitely. You typically have three years to claim one before it is gone.
Households that receive a refund sometimes put it toward a cash buffer, and the right target depends on your expenses, which is where how big your emergency fund should be comes in.
How Do IRS Payment Plans Work?
If you cannot pay the full amount of your taxes or a penalty, the IRS suggests paying what you can now and applying for a payment plan, and setting one up may reduce future penalties. The IRS offers short-term arrangements as well as longer installment agreements, with eligibility and setup details on IRS.gov.
The most concrete effect shows up in the failure-to-pay penalty: an individual who filed on time and has an approved plan in effect pays 0.25% per month instead of 0.5%. That cuts the monthly penalty in half while the plan runs.
What Should You Do if You Can’t Pay Anything Yet?
File the return anyway, even with nothing to send. Filing stops the 5% filing penalty, leaving only the 0.5% payment penalty and interest on the balance. Pay whatever amount you can manage, since every dollar paid reduces what the penalties and interest are calculated on.
The IRS notes that borrowing to cover the tax can sometimes work out cheaper overall than letting IRS interest and penalties stack up, so comparing options before the balance sits for months can pay off. Freeing up cash in the household budget is another route, and lowering your monthly bills does not have to feel like deprivation.
How Will You Know if You Owe a Penalty?
The IRS sends a notice or letter when it charges a penalty. The notice states the penalty, the reason for it and what to do next, and it carries a response deadline, so read it carefully and check the figures. During processing, the IRS checks your return for mathematical accuracy, and once processing is complete, any tax, penalty or interest you owe arrives as a bill. An online account on IRS.gov lets you see your balance and payment history directly.
Can Penalties Be Reduced or Removed?
Two forms of relief exist. First-Time Abate can remove a penalty for taxpayers with a clean compliance history, generally as a one-time break. Reasonable cause relief applies when you can show the failure to file or pay came from reasonable cause rather than willful neglect. The IRS may also remove or reduce some penalties when the information in a notice turns out to be incorrect. Request procedures and eligibility rules are described on IRS.gov, and a tax professional can help you work out whether your situation qualifies.
- When to check your tax withholding: Adjusting withholding during the year can prevent the surprise balance that leads to these penalties in the first place.
- Tax form and refund terms to know: Plain definitions for the paperwork you will handle while sorting out a late return.
- How to lower your monthly bills: Specific ways to free up cash for a tax bill without gutting your budget.
Common questions
Q: What is the minimum penalty for a return more than 60 days late?
A: The lesser of $525 (for returns required to be filed in 2026) or 100% of the tax owed. The 5% monthly penalty applies up to that minimum if it is larger.
Q: Should you file if you can’t pay anything at all?
A: Yes. Filing stops the 5% failure-to-file penalty, leaving only the 0.5% failure-to-pay penalty and interest on the balance. Paying even part of what you owe shrinks the base those charges grow from.
Q: How will you know if the IRS charged a penalty?
A: The IRS sends a notice or letter stating the penalty, the reason for it and what to do next. You can also see your balance and payment history through an online account on IRS.gov.
Q: Can the IRS waive a late-filing penalty?
A: Possibly. First-Time Abate may remove a penalty for taxpayers with a clean compliance history, and reasonable cause relief applies when the failure to file or pay was not willful neglect.
This article is for general information and education only and isn’t personal financial, tax or legal advice. Rates, fees and rules change, so check current details with the provider or an official source before making decisions.