The IRS accepts several specific situations as reasonable cause for waiving a penalty: the death or serious illness of the taxpayer or an immediate family member, an unavoidable absence, fires and natural disasters, an inability to obtain necessary records, and reliance on incorrect written advice from the IRS itself.1Internal Revenue Service. Penalty Relief for Reasonable Cause2Internal Revenue Service. Failure to File Penalty3Internal Revenue Service. Failure to Pay Penalty4Internal Revenue Service. Accuracy-Related Penalty But which example fits your situation matters, because each carries its own evidence requirements.
The Standard Every Example Is Measured Against
Before looking at the specific reasons that qualify, it helps to understand what the IRS is actually testing. The question in every case is the same: did you exercise ordinary business care and prudence in trying to meet your obligation, and were you still unable to comply?5Internal Revenue Service. IRM 20.1.1 Introduction and Penalty Relief – Section: 20.1.1.3.2.2 Ordinary Business Care and Prudence That is a reasonableness standard, not a perfection standard, and the IRS looks at it case by case.
Two things weigh heavily in the analysis. First, your overall compliance history. A taxpayer with years of on-time filings gets more benefit of the doubt than one with repeated late returns. Second, the timing of the disruptive event. A medical emergency two days before April 15 is treated very differently from one that resolved months earlier, because the IRS expects you to recover and catch up when there is time to do so.6Internal Revenue Service. IRM 20.1.1 Introduction and Penalty Relief – Section: 20.1.1.3.2.2.2 Fire, Casualty, Natural Disaster, or Other Disturbance The agency also looks at whether you took interim steps: partial payments, extension requests, filing on time even when you could not pay.
Death, Serious Illness, or Unavoidable Absence
The death of the taxpayer or an immediate family member near a filing deadline is one of the strongest grounds for relief. The IRS recognizes that surviving family members are focused on far more pressing matters than tax paperwork. The death must have occurred close enough to the due date that compliance was realistically impossible.7Internal Revenue Service. IRM 20.1.1 Introduction and Penalty Relief – Section: 20.1.1.3.2.2.1 Death, Serious Illness, or Unavoidable Absence
Serious illness works the same way. If you or a close family member were hospitalized or otherwise incapacitated in a way that prevented you from handling tax obligations, that qualifies. The illness does not have to be life-threatening, but it must have been severe enough that a reasonable person in the same situation would also have missed the deadline.7Internal Revenue Service. IRM 20.1.1 Introduction and Penalty Relief – Section: 20.1.1.3.2.2.1 Death, Serious Illness, or Unavoidable Absence Hospital discharge summaries, physician letters showing dates of incapacity, and death certificates all help build a clear timeline connecting the hardship to the missed deadline.
Unavoidable absence rounds out this category.1Internal Revenue Service. Penalty Relief for Reasonable Cause Think of military deployment, incarceration, or being stranded somewhere without access to records or communication. The common thread is that you were physically or practically unable to act.
Fires, Natural Disasters, and Other Casualties
Fires, floods, hurricanes, and similar disasters are explicitly listed by the IRS as valid reasons for late filing or payment.1Internal Revenue Service. Penalty Relief for Reasonable Cause These events can destroy records, displace families, and cut off access to financial accounts all at once.
A casualty, for these purposes, is damage or loss from an event that is sudden, unexpected, or unusual. Sudden means swift rather than gradual. Unexpected means ordinarily unanticipated. Unusual means outside day-to-day occurrences.8Internal Revenue Service. Publication 547 – Casualties, Disasters, and Thefts Progressive damage like long-term water seepage would not qualify, but a burst pipe that floods your home office overnight would.
For federally declared disasters, the IRS often grants automatic deadline extensions to affected areas, so you may not need to request relief individually. If your situation falls outside an automatic relief zone, you can still argue reasonable cause with disaster declarations, insurance claims, photos of property damage, and temporary-housing records.
Missing Records You Genuinely Could Not Get
Sometimes you cannot file accurately because someone else failed to give you what you needed. A brokerage that sends your 1099 late, an employer that never issues your W-2, or a bank that loses records during a system migration can all leave you without the data required for an accurate return. The IRS accepts this as reasonable cause when you made genuine efforts to obtain the records and still could not.9Internal Revenue Service. IRM 20.1.1 Introduction and Penalty Relief – Section: 20.1.1.3.2.2.3 Unable to Obtain Records
Records destroyed by fire, flood, or another casualty also fall in this category.9Internal Revenue Service. IRM 20.1.1 Introduction and Penalty Relief – Section: 20.1.1.3.2.2.3 Unable to Obtain Records The key is documenting your efforts: copies of letters or emails requesting the records, follow-up communications, and any interim steps such as filing an extension or filing with estimated figures and amending later.
Wrong Written Advice From the IRS
If you followed written advice from an IRS employee and that advice was wrong, the IRS must waive any resulting penalty. This is not discretionary. It is a statutory mandate under 26 U.S.C. § 6404(f). Two conditions apply: you must have reasonably relied on the advice in response to a specific written request you made, and you must have given the IRS adequate and accurate information when you asked.10Office of the Law Revision Counsel. 26 USC 6404 – Abatements
The provision is narrow. It covers written guidance from an IRS officer or employee acting in an official capacity. Verbal advice over the phone does not trigger the automatic abatement under § 6404(f), though it may still support a broader reasonable cause argument. To use this defense, keep the original written response along with a copy of your written request.
Relying on a Tax Professional
Taxpayers often overestimate this one. Relying on a tax advisor can support a reasonable cause claim, but the protection is narrower than most people assume. The Internal Revenue Manual makes clear that reliance on a professional generally applies to the accuracy-related penalty under IRC 6662, not to failure-to-file or failure-to-pay penalties.11Internal Revenue Service. IRM 20.1.1 Introduction and Penalty Relief – Section: 20.1.1.3.3.4.3 Advice From a Tax Advisor
The logic: your responsibility to file and pay on time cannot be delegated. If your accountant misses your filing deadline, the IRS holds you responsible, not your accountant.1Internal Revenue Service. Penalty Relief for Reasonable Cause Where professional reliance does help is on substantive tax questions, such as whether workers are employees or independent contractors, or how to treat a complex transaction. In those cases, you must have given the advisor all relevant information, and the advice must have involved a genuinely technical issue.11Internal Revenue Service. IRM 20.1.1 Introduction and Penalty Relief – Section: 20.1.1.3.3.4.3 Advice From a Tax Advisor
Reasons the IRS Usually Rejects on Their Own
Not every hardship qualifies, and two common arguments almost never work by themselves.
Ignorance of the law is the first. Simply not knowing about a tax requirement is generally not reasonable cause. The IRS expects taxpayers to understand their obligations or get help figuring them out.1Internal Revenue Service. Penalty Relief for Reasonable Cause The exception sits inside the accuracy-related penalty analysis, where the IRS weighs the complexity of the issue, your education and experience, and the effort you made to report the correct amount. A first-time filer wrestling with a complicated partnership allocation gets more leeway than a seasoned investor who ignores clear reporting requirements.
Lack of funds is the second. The IRS states directly that inability to pay alone is not reasonable cause for a late payment.1Internal Revenue Service. Penalty Relief for Reasonable Cause What can push a financial hardship claim across the line is showing that the shortage came from circumstances beyond your control and that you still tried to comply. Did you pay what you could? Did you apply for a payment plan? Did you file on time even though you could not pay the balance? Those steps show the ordinary care and prudence the standard requires. Doing nothing signals indifference rather than hardship.
Check First-Time Abatement Before Building a Reasonable Cause Case
Before assembling documentation for a reasonable cause claim, see whether First-Time Abatement covers you. This administrative relief program waives failure-to-file, failure-to-pay, and failure-to-deposit penalties for taxpayers with a clean compliance history. You qualify if you filed the same type of return for the prior three tax years and did not receive any penalties during that period, or had any prior penalties removed for a reason other than First-Time Abatement itself.12Internal Revenue Service. Administrative Penalty Relief
The appeal of First-Time Abatement is that you do not need to explain why you missed the deadline. Your clean record is the justification. If you qualify for both First-Time Abatement and reasonable cause, consider using First-Time Abatement first and saving reasonable cause in case you need it for a different tax year later. First-Time Abatement is a one-time benefit; reasonable cause has no such limit. First-Time Abatement does not cover returns with event-based filing requirements, daily delinquency penalties for exempt organizations, or information-return penalties that depend on another filing.12Internal Revenue Service. Administrative Penalty Relief
How to Request Relief Once You Know You Qualify
Three main paths exist. Calling the IRS is fastest for straightforward requests, especially First-Time Abatement. If the representative cannot approve it on the call, they will direct you to submit it in writing.1Internal Revenue Service. Penalty Relief for Reasonable Cause
For written requests, use Form 843, Claim for Refund and Request for Abatement.13Internal Revenue Service. Form 843 – Claim for Refund and Request for Abatement File a separate form for each tax period, identify the specific penalty code section, and attach every piece of supporting documentation that fits your category: medical records, death certificates, correspondence showing your attempts to obtain missing information, proof of disaster impact. The narrative section is where you lay out what happened, when it happened, and how it prevented compliance. Be specific about dates and tie each fact directly to the missed deadline.
If your request is denied, you generally have 30 days from the date on the rejection letter to request an appeal with the IRS Independent Office of Appeals, though the letter itself may state a different deadline.14Internal Revenue Service. Penalty Appeal