HOW-TO GUIDE
How to Handle Late Filing Penalties — Abatement Guide 2026
Step-by-step guide to penalty abatement — failure-to-file, failure-to-pay, First-Time Abatement, reasonable cause, and IRS penalty appeal procedures.
IRS Penalty Overview: What You're Dealing With
The IRS assesses billions of dollars in penalties each year. The most common penalties for individual taxpayers are: (1) failure-to-file penalty (IRC §6651(a)(1)) — 5% of unpaid tax per month, up to 25%; (2) failure-to-pay penalty (IRC §6651(a)(2)) — 0.5% of unpaid tax per month, up to 25%; and (3) accuracy-related penalty (IRC §6662) — 20% of the underpayment attributable to negligence or substantial understatement.
The good news: the IRS abates penalties in two situations — First-Time Abatement (FTA) and reasonable cause. FTA is available to taxpayers with a clean compliance history (no penalties in the prior 3 years). Reasonable cause is available when the taxpayer had a legitimate reason for the failure (illness, death in family, natural disaster, reliance on a tax professional).
| Penalty | IRC Section | Rate | Maximum | Abatement Available |
|---|---|---|---|---|
| Failure to File | §6651(a)(1) | 5%/month of unpaid tax | 25% | FTA or reasonable cause |
| Failure to Pay | §6651(a)(2) | 0.5%/month of unpaid tax | 25% | FTA or reasonable cause |
| Estimated Tax Underpayment | §6654 | Federal short-term rate + 3% | No cap | Waiver if meets safe harbor |
| Accuracy-Related | §6662 | 20% of underpayment | No cap | Reasonable cause + good faith |
| Fraud | §6663 | 75% of underpayment | No cap | Not abatable |
| Failure to Deposit (payroll) | §6656 | 2%–15% of underpayment | 15% | FTA or reasonable cause |
First-Time Abatement (FTA) — Step by Step
Eligibility Requirements: FTA is available for the failure-to-file, failure-to-pay, and failure-to-deposit penalties. To qualify: (1) no penalties in the prior 3 years (other than estimated tax penalties); (2) all required returns have been filed (or extensions filed); (3) any tax owed has been paid or a payment arrangement is in place.
How to Request FTA: Call the IRS at 1-800-829-1040 and request FTA. The IRS representative will check your compliance history and, if you qualify, abate the penalty immediately over the phone. Alternatively, send a written request by certified mail. FTA requests are granted over the phone approximately 70% of the time.
FTA Script: 'I am calling to request First-Time Abatement of the [failure-to-file/failure-to-pay] penalty assessed on my [year] return. I have filed all required returns and have a clean compliance history for the prior 3 years. I am requesting abatement under the IRS's First-Time Abatement administrative waiver policy (IRM 20.1.1.3.6).' If the representative says FTA is not available, ask to speak with a supervisor.
Reasonable Cause Abatement — Step by Step
Reasonable cause abatement is available when the taxpayer exercised ordinary business care and prudence but was unable to comply with the tax law. Common reasonable cause arguments: serious illness or incapacitation; death of a family member; natural disaster; reliance on erroneous advice from a tax professional; and inability to obtain records.
To request reasonable cause abatement: (1) write a detailed letter explaining the circumstances; (2) attach supporting documentation (medical records, death certificate, insurance claim, etc.); (3) send by certified mail to the IRS service center that issued the penalty notice; (4) reference the specific penalty and tax year.
If the IRS denies the reasonable cause request, appeal to the IRS Independent Office of Appeals. The Appeals Office has broad authority to settle cases based on the hazards of litigation — approximately 60% of penalty cases are resolved favorably at Appeals.
Case Study: $12,400 Penalty Abated via FTA
Sarah filed her 2024 return late (October 2025) and owed $48,000 in taxes. The IRS assessed a failure-to-file penalty of $12,000 (25% of $48,000) and a failure-to-pay penalty of $2,400 (5% of $48,000 for 5 months). Her practitioner called the IRS and requested FTA — Sarah had filed on time and paid on time for 2021, 2022, and 2023. The IRS abated both penalties ($14,400 total) in a single phone call. The call took 22 minutes. Fee: $250.
Client Conversation Script
Client: 'I got a penalty notice for $3,200 for filing my return late. Is there anything I can do?' Practitioner: 'Yes — there are two options. First, I'll check if you qualify for First-Time Abatement. If you filed on time and paid on time for the prior 3 years, the IRS will abate the penalty over the phone. Second, if you had a legitimate reason for filing late — illness, family emergency, anything like that — we can request reasonable cause abatement with documentation. What was going on when you missed the filing deadline?'
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Apply to Join the Marketplace →Frequently Asked Questions
First-Time Abatement (FTA) is an administrative waiver that abates the failure-to-file, failure-to-pay, and failure-to-deposit penalties for taxpayers with a clean 3-year compliance history. FTA is not publicized by the IRS — you must request it. It can be requested by phone (1-800-829-1040) or in writing.
The failure-to-file penalty under IRC §6651(a)(1) is 5% of the unpaid tax per month (or part of a month) that the return is late, up to a maximum of 25%. If both the failure-to-file and failure-to-pay penalties apply in the same month, the failure-to-file penalty is reduced by the failure-to-pay penalty (net 4.5% per month).
Yes — you can request a refund of penalties already paid by filing Form 843 (Claim for Refund and Request for Abatement). The statute of limitations for refund claims is 3 years from the original return due date or 2 years from the date you paid the tax, whichever is later.
Documentation depends on the reason: serious illness (medical records, doctor's letter); death in family (death certificate, obituary); natural disaster (insurance claim, FEMA documentation); reliance on tax professional (written advice from the professional, engagement letter). The more specific and documented your explanation, the better your chances of success.
If the IRS denies your request, you can appeal to the IRS Independent Office of Appeals. File Form 12203 (Request for Appeals Review) within 30 days of the denial. The Appeals Office has broad authority to settle cases — approximately 60% of penalty cases are resolved favorably at Appeals.
Yes — the estimated tax underpayment penalty under IRC §6654 applies when you do not pay enough estimated tax during the year. The penalty is calculated at the federal short-term rate plus 3% on the underpayment. The penalty is avoided if you meet a safe harbor: pay 100% of prior year tax (110% if prior year AGI exceeded $150,000) or 90% of current year tax.
The accuracy-related penalty (20% of underpayment) can be abated for reasonable cause and good faith. The taxpayer must show they had a reasonable basis for their position and acted in good faith. Reliance on a tax professional's advice is a common reasonable cause argument — but the reliance must be reasonable and the professional must have been given all relevant facts.
The information on this page is intended for licensed tax professionals (CPAs, EAs, and tax attorneys) and is provided for educational and research purposes only. Tax law is complex and fact-specific — all strategies discussed are subject to limitations, phase-outs, and conditions that may not apply to every client situation. Practitioners should independently verify all information against current IRS guidance, Treasury Regulations, and applicable state law before advising clients. This content does not constitute legal or tax advice.
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