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IRS Form 843

Claim for Refund and Request for Abatement

Form 843 is the IRS's general-purpose claim form for penalty abatement, refunds of erroneously collected tax, and abatement of interest caused by IRS error or delay. It's the vehicle for First Time Abate (FTA) requests, reasonable-cause penalty relief, and refund claims that don't fit on a 1040-X. Filed on the wrong basis, it gets denied outright and starts a 2-year Tax Court refund-suit clock — so knowing which box to check and what to attach is everything.

Who Files This

Individuals, estates, trusts, and businesses seeking abatement of failure-to-file, failure-to-pay, or accuracy-related penalties, or a refund of tax/penalty/interest they believe was assessed in error. Cannot be used for income tax refunds (use Form 1040-X) or employment tax adjustments to Form 941 (use Form 941-X).

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Legally reviewed byGregory McCauley Jr., Esq.

Tax Attorney · Villanova University School of Law · Admitted in Delaware, New Jersey, United States Tax Court

Last reviewed

What's at Stake With Form 843

A denied Form 843 starts the 2-year clock to sue for refund in U.S. District Court or Court of Federal Claims. A poorly-supported filing (checking 'reasonable cause' with no documentation) is denied by default and forces you to Appeals or litigation. Missing the 3-year-from-filing / 2-year-from-payment statute of limitations means the claim is dead on arrival.

How to File Form 843 Correctly

  1. 1
    Confirm you're within the refund statute of limitations

    Form 843 must be filed within 3 years of the return's original due date OR 2 years from the date the tax/penalty was paid, whichever is later. File one day late and the claim is barred permanently.

  2. 2
    Screen for First Time Abate (FTA) before writing a reasonable-cause letter

    FTA is administrative — if you have a clean 3-year compliance history, you can get FTFP/FTPP penalties abated by phone in minutes. Save Form 843 for years FTA won't cover.

  3. 3
    Check the correct box for the reason

    Reasonable cause, IRS error, interest due to IRS delay, and erroneous refund each have different evidentiary standards. Reasonable cause requires a written narrative + supporting docs (hospital records, death certificates, disaster declarations).

  4. 4
    Attach a detailed reasonable-cause statement

    IRS reviewers apply a facts-and-circumstances test: (1) what happened, (2) how it prevented compliance, (3) what you did to comply once the situation ended. Boilerplate letters get denied.

  5. 5
    Mail to the service center that handled the tax period, not a generic address

    The correct address depends on the tax form and issue — check the Form 843 instructions. Wrong address = months of misrouting.

Why File Form 843 With a Tax Attorney

Attorney-Client Privilege

Once you sign IRS paperwork, every fact you disclosed becomes evidence. Privilege protects the conversation before you commit.

We Know the IRS Standards

Collection Financial Standards, RCP math, and ACS vs. Field Collection rules change what number you should put on this form.

We Catch the Traps

Direct-debit triggers, dissipated-asset addbacks, AMT preference items — most of the cost of these forms is in what you didn't know to negotiate.

Real Legal Representation

If the IRS rejects, defaults, or audits you off this form, we represent you through Appeals, Tax Court, or U.S. District Court.

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Costly Mistakes With Form 843

Filing after the 3-year / 2-year statute of limitations — claim barred permanently.

Requesting reasonable cause without documentation (hospital records, death certificate, disaster declaration).

Using Form 843 for income tax refunds instead of Form 1040-X.

Skipping First Time Abate and writing a reasonable-cause letter for a year FTA would have covered automatically.

Filing one Form 843 for multiple tax periods — each period needs its own form.

Frequently Asked Questions About Form 843

Can I use Form 843 to get an income tax refund?

No. Income tax refund claims go on Form 1040-X (amended return). Form 843 is for penalties, interest, and non-income taxes (employment tax withholding disputes on your personal return, excise taxes, gift tax penalties, etc.).

What's the difference between First Time Abate and Form 843 reasonable cause?

FTA is an administrative waiver you can request by phone if you have a clean 3-year compliance record — no reason required. Reasonable cause on Form 843 requires you to prove a specific event (illness, disaster, reliance on a professional) prevented compliance. Always try FTA first; reserve reasonable cause for years FTA won't cover.

How long does the IRS take to process Form 843?

3–6 months is typical, 6–12 months during backlogs. If denied, you get a 30-day letter to appeal to IRS Appeals. If Appeals also denies, you have 2 years from the denial to sue in District Court or the Court of Federal Claims.

Can I file Form 843 for interest the IRS charged?

Interest itself is generally not abatable — but interest caused by IRS delay, unreasonable error, or ministerial/managerial acts is abatable under §6404(e). This is a narrow provision; documenting the specific IRS delay is essential.

Tax Resolution Services Related to Form 843

Senior tax attorneys at McCauley Law Offices handle the underlying matters that send taxpayers Form 843 in the first place.

Penalty Abatement

Remove or reduce IRS penalties through first-time abatement or reasonable cause.

Primary Sources & Authority

We cite the underlying IRS publications and statutes so you can verify everything on this page.