What Is IRS Form 843? A Complete Guide to Penalty Abatement

Updated April 2026 · 6 min read

IRS Form 843, officially titled “Claim for Refund and Request for Abatement,” is the form taxpayers and tax professionals use to request a refund or abatement of certain taxes, penalties, interest, and additions to tax. If a taxpayer has been assessed a penalty they believe is unjustified—or qualifies for relief under IRS policy—Form 843 is the standard vehicle for requesting that the IRS remove or reduce the penalty.

For tax professionals handling multiple penalty abatement cases, understanding Form 843 inside and out is essential. This guide covers when to file, which penalties qualify, how to complete each section, and how to automate the process.

When Should You File Form 843?

Form 843 is used when a taxpayer wants to request relief from penalties or certain taxes that have already been assessed. Common scenarios include:

Penalties assessed in error — The IRS applied a penalty based on incorrect information or a processing mistake.
Reasonable cause — The taxpayer had a legitimate reason for non-compliance, such as a natural disaster, serious illness, or reliance on erroneous IRS advice.
First-time penalty abatement (FTA) — The taxpayer has a clean compliance history and qualifies for administrative relief.
Statutory exceptions — Certain penalties assessed during specific periods may be subject to challenge, as established by court rulings such as Kwong v. United States (2023).

Form 843 is not used to amend a tax return (use Form 1040-X for that) or to dispute the amount of tax owed. It is specifically for penalties, interest, and certain fees.

Types of Penalties That Can Be Abated

The IRS assesses dozens of penalty types, but the most common ones addressed via Form 843 fall into three categories:

Failure-to-File Penalty (IRC § 6651(a)(1))

Assessed when a taxpayer does not file their return by the due date (including extensions). The penalty is typically 5% of the unpaid tax per month, up to a maximum of 25%. This is one of the most frequently abated penalties because many taxpayers have legitimate reasons for late filing.

Failure-to-Pay Penalty (IRC § 6651(a)(2))

Assessed when a taxpayer files on time but does not pay the full amount owed by the due date. The penalty is 0.5% of the unpaid tax per month, also capped at 25%. Taxpayers who set up installment agreements may see this rate reduced to 0.25% per month.

Accuracy-Related Penalty (IRC § 6662)

Assessed when the IRS determines there was a substantial understatement of income tax, negligence, or disregard of rules. The penalty is typically 20% of the underpayment. Abatement requires demonstrating reasonable cause and good faith.

First-Time Penalty Abatement: The Most Common Relief

First-time penalty abatement (FTA) is an administrative waiver the IRS grants to taxpayers who meet three criteria:

Clean compliance history — No penalties (or all penalties fully abated) for the three tax years prior to the penalty year.
Filing compliance — All required returns have been filed or a valid extension is on record.
Payment compliance — Any tax due has been paid, or the taxpayer has an approved payment arrangement.

FTA is often the fastest path to penalty relief. Tax professionals should always check FTA eligibility before pursuing reasonable cause arguments, since FTA requires no supporting documentation beyond the taxpayer's compliance record.

How to Fill Out Form 843: Section by Section

Form 843 is a one-page form, but filling it out correctly is critical. Errors or incomplete information can delay processing by months. Here is what each section requires:

Taxpayer Information (Lines 1–3)

Enter the taxpayer's name, address, Social Security Number (or EIN for businesses), and the spouse's SSN if filing jointly. This must match the information on the original return exactly.

Tax Period and Amount (Lines 4–5)

Specify the tax period for which abatement is requested and the dollar amount of the refund or abatement. Be precise—the amount should match the penalty shown on the IRS notice or transcript.

Type of Tax (Line 6)

Check the appropriate box for the type of tax (income, estate, gift, employment, excise, or other). For most individual penalty abatement cases, this will be “Income.”

Reason for Refund or Abatement (Line 7)

This is the most important section. Clearly state the reason for the request. For FTA, reference the IRS's administrative waiver policy. For reasonable cause, provide a detailed narrative explaining the circumstances that prevented compliance, supported by documentation. Be specific: dates, events, and the direct connection between the circumstance and the failure to comply.

Signature

The taxpayer (or authorized representative with a valid Power of Attorney on file) must sign and date the form. If a representative signs, attach Form 2848.

How Tax Claim VLP Automates Form 843 Generation

Manually preparing Form 843 for each taxpayer is time-consuming, especially when handling multiple penalty abatement cases. Tax Claim VLP streamlines this process:

Transcript integration — Import IRS transcript data directly from TaxMonitor Pro. The system reads penalty assessments, compliance history, and account balances automatically.
Automatic FTA qualification check — The platform evaluates whether the taxpayer meets first-time penalty abatement criteria based on their three-year compliance history.
Pre-filled Form 843 — Taxpayer information, penalty amounts, tax periods, and abatement reasons are populated automatically. No manual data entry.
Batch processing — Generate Form 843 for multiple taxpayers in a single session, saving hours of preparation time.

Instead of spending 30–45 minutes per form, tax professionals can generate a complete, accurate Form 843 in minutes—ready for review, signature, and submission to the IRS.