If you missed the April 15 tax deadline and owe taxes: file your return immediately, pay as much as you can today, and set up a payment plan for the remainder. The failure-to-file penalty (5% per month) is typically much larger than the failure-to-pay penalty (0.5% per month). Filing now stops the larger penalty from growing. If you are owed a refund, there is no penalty -- you have up to 3 years to claim it.
- If you're owed a refund, filing late has no penalty -- the IRS won't pay interest, but there's no failure-to-file charge.
- Filing immediately stops the 5% per month failure-to-file penalty from growing.
- Pay as much as you can by the day you file -- partial payment reduces the interest and failure-to-pay penalty base.
- An IRS installment agreement reduces the failure-to-pay rate from 0.5% to 0.25% per month while it's active.
- First-Time Penalty Abatement (FTA) can eliminate failure-to-file and failure-to-pay penalties if you have a clean prior compliance history.
If You're Owed a Refund: No Penalty
The failure-to-file and failure-to-pay penalties apply only when you owe taxes. If you overpaid through withholding or estimated tax payments and are owed a refund, filing late carries no IRS penalty. The IRS will not pay you interest on your refund for the late filing, but it will not charge you either. You have up to 3 years from the original filing deadline to claim a refund. After that, the refund is permanently forfeited to the Treasury.
If You Owe Taxes: File Now, Even If You Cannot Pay
The single most important action after missing the deadline is to file your return as soon as possible. Do not wait until you have the full payment ready. The failure-to-file penalty is 5% of the unpaid tax per month (or part of a month), capped at 25%. It begins accumulating from the day after the original deadline. The failure-to-pay penalty is only 0.5% per month, also capped at 25%. Filing immediately stops the 5% per month penalty from continuing to grow, even if you cannot pay the full balance. If both penalties apply in the same month, the failure-to-file rate is reduced by the failure-to-pay rate -- resulting in a combined effective rate of 5%, not 5.5%.
Understanding the Two Penalties
| Penalty | Rate | Cap | Trigger |
|---|---|---|---|
| Failure to File | 5% per month | 25% | Return not filed by due date (with extensions) |
| Failure to Pay | 0.5% per month | 25% | Tax not paid by original due date |
| Minimum FTF (over 60 days) | $525 or 100% of tax owed | Lesser of | Return filed more than 60 days late in 2026 |
Interest also accrues at the federal short-term rate plus 3%, compounded daily, on any unpaid balance from the original due date. Interest is not waivable even with penalty abatement.
Steps to Take Right Now
- Gather your tax documents (W-2, 1099s, receipts for deductions).
- Complete and file your Form 1040 -- even a rough but accurate return stops the failure-to-file penalty.
- Pay as much as you can today via IRS Direct Pay (irs.gov/payments/direct-pay) -- partial payment reduces the penalty and interest base immediately.
- If you cannot pay the remainder, apply for an IRS installment agreement online at IRS Online Account or by filing Form 9465. An active installment agreement reduces the failure-to-pay rate from 0.5% to 0.25% per month.
- Check your eligibility for penalty relief before paying any penalty amount.
Penalty Relief: First-Time Abatement and Reasonable Cause
The IRS offers two main relief paths for failure-to-file and failure-to-pay penalties. First-Time Penalty Abatement (FTA) applies if you have a clean compliance history for the 3 prior tax years -- no penalties for late filing, late payment, or failure to deposit. FTA can eliminate the failure-to-file and failure-to-pay penalties in full. Request it by calling the IRS at 800-829-1040 or by responding to your notice. Reasonable cause relief applies when a serious circumstance -- illness, natural disaster, death of a family member, destruction of records -- caused the late filing. It requires documentation and written explanation. Note: The IRS does not abate interest under either relief path.
Can You Still File an Extension After the Deadline?
No. Form 4868 (Extension of Time to File) must be filed by the original April 15 deadline. If you missed April 15 without filing Form 4868, your return is now simply late -- you cannot retroactively request an extension. However, if you did file Form 4868 in April and are now past the October 15 extension deadline, the same rules apply: file immediately, pay what you can, request penalty relief if eligible.
Practitioner Insight
The most common mistake we see after a missed deadline is clients waiting to file until they can pay the full amount. This is exactly backwards. Every additional month without a filed return adds 5% to the penalty base on the unpaid tax. Filing a return with a partial payment stops the larger clock immediately. A client who owed $4,000 and waited 3 months to file (because they didn't have the money) accumulated roughly $600 in failure-to-file penalties alone -- penalties that could have been eliminated if they had filed on day one and paid $200. File first. Arrange the payment second.
Real-World Scenario
David, single filer, missed the April 15 deadline. He owed $3,600 in federal tax. He waited 2 months before filing. Failure-to-file penalty: $3,600 x 5% x 2 months = $360. Failure-to-pay penalty: $3,600 x 0.5% x 2 months = $36. Interest (at approximately 8% annual rate, compounded daily for 60 days): approximately $47. Total additional cost from waiting: approximately $443.
If David had filed on April 16 (one day late) and paid even $500 toward his balance: Failure-to-file penalty: effectively stopped after 1 month at approximately $160 (on the unpaid $3,100 remaining after the $500 payment). The remaining balance would be handled via payment plan at 0.25%/month rather than 0.5%/month.
Filing even with a partial payment dramatically reduces the penalty exposure.
When Standard Late-Filing Recovery Does Not Apply
- You owe back taxes from prior years: Multiple unfiled years interact with each other. The IRS may issue a Substitute for Return (SFR) -- a return filed on your behalf using only information returns -- that likely generates a higher tax liability than your actual return. File all missing years as soon as possible, starting with the most recent.
- Your extension was also missed: If you filed Form 4868 in April but also missed the October 15 extended deadline, both the failure-to-file and failure-to-pay penalties apply from October 15 onward. The FTA path is still available if your compliance history qualifies.
- You have a history of late filing: The First-Time Abatement path is not available if you received a penalty in any of the 3 prior tax years. You must pursue reasonable cause relief instead, which requires documented circumstances.
- Your balance is large enough to trigger collection action: The IRS can file a Notice of Federal Tax Lien if the balance exceeds the lien filing threshold (currently $10,000). File and arrange payment before the IRS initiates lien filing. A payment plan does not automatically prevent a lien, but it does demonstrate good faith and may delay collection action.
Frequently Asked Questions
What to Do Next
If you owe taxes and missed the filing deadline: file your return today using the IRS Free File program (available for eligible filers) or tax software. Then use the IRS Payment Plan Calculator to see your monthly installment options and total interest cost over the payment period.
If you cannot pay the full amount, review your full options in the IRS Payment Plan Options Guide. It covers short-term payment plans (no setup fee, balance due within 180 days), long-term installment agreements, and the Currently Not Collectible status.
If you need to file an extension for a future year, review How to File a Tax Extension before April 15. An extension gives you until October 15 to file -- but taxes owed are still due April 15.