What it is
Relief decided on your facts, not on your history.
Where First Time Abate asks whether your record is clean, reasonable cause asks a different question: did something happen that stopped an ordinarily careful taxpayer from meeting the deadline, despite genuinely trying?
That difference is why this route stays open when the waiver is gone. A penalty in the last three years takes First Time Abate off the table. It has no bearing at all on whether your mother died in March, or whether the fire took your records.
Reasonable cause is decided on the written story and the documents behind it. There is no form field for it and no box to tick. Somebody at the IRS reads what you wrote and decides whether it establishes cause, which is exactly why how it is written matters.
Who qualifies
The circumstances the IRS actually evaluates.
- Serious illness or incapacity, yours or in your immediate family, during the period the return or the payment was due.
- A death in the family, with the disruption that follows it.
- Fire, flood, natural disaster or another casualty that made compliance impossible.
- Records you could not obtain, through no fault of your own, when you needed them to file accurately.
What is not reasonable cause: forgetting, being busy, or not knowing the deadline existed. A request built on one of those is a request that fails, and we will tell you that for free rather than prepare it.
The authority
What we cite when we prepare your request.
Your written request asks that the penalty be abated for reasonable cause, as provided by Internal Revenue Code Section 6651(a) and Treasury Regulation Section 301.6651-1(c)(1).
That regulation is the one that frames the test the IRS applies: whether you exercised ordinary business care and prudence and were nevertheless unable to meet the deadline. A strong request is not a sad story. It is a story told against that test, with dates that line up and documents that support it.
How to ask for it
Four steps, in the order that works.
Check where you stand
Run the free eligibility check first. It tells you whether reasonable cause is your route, whether the waiver is still open to you, or whether you have no case worth filing.
Fix the dates to the events
Write down what happened and when, against the date the return or payment was due. A request whose timeline does not reach the deadline is the most common way a genuine case gets denied.
Gather what supports it
Hospital records, a death certificate, an insurance claim, a letter from a doctor. You do not need all of it, but a request carrying none of it is asking the IRS to take your word alone.
Send it, then confirm it landed
Mail the written request and keep proof of mailing. About three weeks later, call the number on your notice to confirm it was received and to check the status.
Questions people ask
Straight answers
Do I need a clean record for reasonable cause?
No. That is the whole difference between this route and First Time Abate. Reasonable cause turns on what happened to you around the deadline, not on whether the IRS penalised you in an earlier year.
Is being too busy a reasonable cause?
No, and neither is forgetting or not knowing the deadline existed. The test is whether you exercised ordinary business care and prudence and were still unable to comply. A heavy workload does not meet it, and a request built on one will be denied.
How long does a reasonable cause request take?
Reasonable cause requests typically get a response in 30 to 90 days. Use your call script to confirm receipt about three weeks after mailing, then again if the wait runs long. Penalties and interest can continue to accrue on an unpaid balance while you wait.
Can I argue reasonable cause on the phone?
Not really. A phone agent can sometimes grant First Time Abate on the spot, but reasonable cause is decided on your written story and the documents behind it. The call is worth making to confirm your letter arrived and to check status, not to make the argument.
Free eligibility check
Find out where you stand in about a minute.
Seven questions. No Social Security Number, no documents, no signup, and nothing you type is stored or sent anywhere. If you do not have a case, it says so and you pay nothing.