Penalties & Relief
Reasonable Cause Penalty Abatement: How to Qualify and Ask (2026)
The short answer: reasonable cause penalty abatement is the IRS removing your late-filing or late-payment penalties when something beyond your control — like serious illness, a death, or a disaster — stopped you from meeting the deadline. You ask by phone, by letter, or with Form 843, and you must back it up with proof.
⏱ Time matters: request abatement as soon as you can. If you already paid the penalty and want it refunded, you generally have 3 years from when you filed the return or 2 years from when you paid the penalty — whichever is later — to file Form 843. Miss that window and the money is gone.
What "reasonable cause" actually means
Reasonable cause penalty abatement is for people who tried to do the right thing but got knocked off course by something they couldn't control. The IRS asks a simple question: did you use "ordinary business care and prudence" and still fall behind because life got in the way? If yes, the penalty may come off.
The IRS spells this out in its own guidance on penalty relief due to reasonable cause. The key is that the event has to line up with the exact dates you couldn't file or pay. "I was overwhelmed" doesn't work. "I was hospitalized from March 1 to April 30" does.
Reasonable cause can apply to the failure-to-file penalty, the failure-to-pay penalty, and some others. If you want the difference between those two penalties, our guide on failure-to-file vs. failure-to-pay penalties breaks it down.
Reasons that usually work — and ones that don't
No two cases are identical, but patterns show up again and again. Reasons the IRS tends to accept:
- Serious illness or injury — yours or an immediate family member's — that kept you from handling your affairs.
- Death in the family, especially a spouse or someone whose affairs you managed.
- Natural disaster, fire, or theft that destroyed your records or your home.
- Unable to get records through no fault of your own — for example, a payroll company or former employer that wouldn't provide documents.
- Bad advice you reasonably relied on from a tax professional on a complex issue.
Reasons that usually fall flat on their own:
- "I forgot" or "I didn't know the deadline."
- "I didn't have the money." (Lack of funds alone rarely qualifies — though the reason you had no money, like a sudden job loss or medical crisis, sometimes does.)
- "My preparer was late" — unless you can show you gave them everything in time.
Reasonable cause vs. first-time penalty abatement
Before you build a reasonable-cause case, check whether you qualify for the easier option. First-time abatement (FTA) removes a penalty based purely on a clean record — no story, no proof needed. You generally qualify if you filed all required returns, have no penalties in the prior three years, and have paid or arranged to pay any tax due. The IRS explains this on its first-time penalty abatement page.
Here's the strategy that trips people up: FTA only covers one tax period. If you owe penalties for several years, it can be smarter to use FTA on the year with the biggest penalty and use reasonable cause for the others. Get the order wrong and you can leave money on the table. To see how large these penalties grow, our breakdown of how big IRS penalties get shows the math.
A worked example
Say you owed $20,000 in tax for 2023 and filed and paid eight months late after a serious illness. The failure-to-pay penalty runs 0.5% per month, and the failure-to-file penalty runs 5% per month (reduced by the failure-to-pay amount in months they overlap), capped at 25%.
- Failure-to-file penalty: roughly $4,000 (the 25% cap reached quickly).
- Failure-to-pay penalty: about $800 over eight months.
- Total penalties: around $4,800 — before interest.
If your illness counts as reasonable cause for those months, that roughly $4,800 in penalties may be removed, plus the interest charged on the penalties. The interest on the underlying $20,000 keeps running until you pay it — abatement clears penalties, not the tax itself.
What happens if you don't ask
The IRS does not remove penalties on its own. The amount sits on your account and behaves like the rest of the balance:
- The penalty stays on your balance and interest compounds on it daily.
- Collection notices continue — CP14, then reminder notices, then notices of intent to levy. The penalty is just folded into the total the IRS pursues.
- Refund offsets and levies eventually apply to the whole balance, penalties included.
- The refund window closes. If you already paid the penalty, the clock to claim it back runs out — and after that, even a perfect reasonable-cause story can't get the money returned.
The lesson isn't that the IRS is out to get you — it's that the system won't volunteer relief. You have to ask, and you have to ask the right way.
How to request reasonable cause penalty abatement, step by step
- Pull your notice and your transcript. Identify the exact penalty type, tax year, and dollar amount. Your IRS online account shows the breakdown.
- Check first-time abatement first. If your record is clean, that may be the faster path for at least one year.
- Write down your timeline. List the event, the exact dates, and how it stopped you from filing or paying. Tie every date to the deadline you missed.
- Gather proof. Hospital records, a death certificate, an insurance or fire-department report, a disaster declaration, or letters from doctors. Documents win these cases — adjectives don't.
- Choose how to ask. Call the number on your notice for smaller, recent penalties; send a written request with your documents; or file Form 843, Claim for Refund and Request for Abatement — especially if you already paid the penalty.
- Keep copies and follow up. Save everything you send. If the IRS denies the request, you have the right to appeal — and a fresh set of eyes can change the result.
Not sure if your reason qualifies?
Tell us what happened and send us the notice. An experienced tax professional will tell you honestly whether reasonable cause or first-time abatement is the stronger play — and handle the request — free, confidential, no pressure.
Reasonable cause penalty abatement questions, answered
What counts as reasonable cause for the IRS?
Reasonable cause means something outside your control stopped you from filing or paying on time even though you tried to be responsible. Common examples include serious illness, a death in the family, a natural disaster, a house fire, or records you couldn't get. Simply forgetting or not having the money usually isn't enough on its own.
What's the difference between reasonable cause and first-time abatement?
First-time abatement (FTA) is granted based on a clean compliance history — no proof or story required. Reasonable cause is granted based on the circumstances that caused the late filing or payment, and you have to document them. If you qualify for FTA, the IRS usually applies that first because it's easier to get.
Does reasonable cause penalty abatement remove interest too?
Usually not. Interest is set by law and the IRS rarely removes it on its own. But when a penalty is removed, the interest that was charged on that penalty is removed with it. Interest on the underlying tax keeps running until the tax is paid.
How do I request reasonable cause penalty abatement?
You can call the number on your notice, write a letter explaining your circumstances with supporting documents, or file Form 843, Claim for Refund and Request for Abatement. Whichever route you take, tie your reason directly to the exact dates you couldn't file or pay, and attach proof.
Can I get penalties back if I already paid them?
Yes. If you already paid a penalty that should be abated, you can request a refund using Form 843. There's a deadline — generally within three years of filing the return or two years of paying the penalty, whichever is later — so don't wait too long.
This guide is general information, not tax or legal advice for your specific situation. Eligibility for IRS programs depends on individual facts and circumstances; no outcome is guaranteed.