How to Dispute an IRS Penalty

Learn the step-by-step process to formally challenge IRS penalties you believe are wrong or unfair.

1. Understand what penalties you can dispute. You can challenge failure-to-file penalties, failure-to-pay penalties, accuracy-related penalties, and estimated tax penalties. You cannot dispute interest charges on unpaid taxes. The IRS must have sent you a notice explaining the penalty before you can formally dispute it.
2. Gather your documentation and build your case. Collect records that support your dispute: tax documents, payment receipts, medical records, or correspondence with tax preparers. Common successful arguments include reasonable cause (illness, natural disaster, death in family), IRS error, or first-time penalty relief if you have a clean compliance history for the past 3 years.
3. Choose your dispute method. File Form 843 (Claim for Refund and Request for Abatement) for formal disputes, or write a penalty abatement letter for simpler cases. Form 843 works better for complex situations or when you're requesting a refund of penalties already paid. Letters work for straightforward reasonable cause arguments.
4. Submit your dispute within the time limits. File within 3 years of when you filed the return or 2 years from when you paid the penalty, whichever is later. Mail your Form 843 or letter to the address on your penalty notice. Include copies of supporting documents, never originals.
5. Follow up and escalate if needed. The IRS typically responds within 6-8 weeks. If they deny your request, you can appeal to the IRS Appeals Office within 30 days or request a Collection Due Process hearing. If you disagree with the Appeals decision, you can take your case to Tax Court.