Do I still qualify for first-time penalty abatement?

FTA is being replaced by Automatic Exemption from Penalty (AEP). AEP may apply automatically to eligible 2025 tax-year returns and 2026 quarterly returns when the prior three years (or 12 quarters) were timely — no Form 843. FTA can still be requested for certain prior and transition periods, including some 2024 returns and 2025/2026 returns processed before AEP started. For original returns due on or after January 1, 2027, FTA is replaced by AEP. If AEP or FTA does not apply, reasonable cause remains the primary request path.

What counts as "reasonable cause" for the IRS?

The IRS recognizes a taxpayer had reasonable cause when they exercised ordinary business care and prudence but were unable to comply with their tax obligations due to circumstances beyond their control. Common qualifying circumstances include: serious illness or death in the family, natural disaster, destruction of records, prolonged inability to obtain records, and reliance on incorrect advice from a tax professional. The IRS does not recognize ignorance of tax law, financial hardship alone, or willful neglect as reasonable cause. The standard is fact-intensive — the more specific your documentation, the higher the success rate.

Can I get penalties from multiple years abated at once?

Yes. A single Form 843 filing can request abatement for multiple tax years and multiple penalty types — though the substantiation must support each year and each penalty separately. Multi-year cases are the most common scenario for our business clients.

Will requesting abatement trigger an audit?

No. Filing Form 843 to request penalty abatement does not increase audit risk. Penalty abatement is an administrative procedure that addresses the assessment of penalties — not the underlying tax return. The IRS reviews the abatement request on its merits without re-examining the original return.

What happens to the interest charged on the penalty?

When the IRS abates a penalty, any interest that was charged on that penalty is also abated. If you have already paid the penalty and the interest, both amounts are refunded to you. This is why the total refund amount on a successful abatement request is often significantly larger than the original penalty assessment.

C-Corp IRS Penalty Abatement | C-Corporation Penalty Refund

C-Corp IRS Penalty Abatement: The Refund Path for Business Owners

IRS penalty abatement for C-Corporations — federal income tax penalties, payroll penalties, and information return penalties. For C-Corp owners, relief is AEP when the IRS already declined to assess, FTA on certain transition periods, reasonable cause, and Form 843 when a penalty was already assessed or paid.

By the Master Plan Bookkeeping tax representation practice

Authorized IRS Representation

C-Corporation entities face a distinct set of IRS filings and a corresponding distinct set of penalty exposures. Where individual taxpayers worry primarily about Form 1040 deadlines, C-Corp owners contend with entity-level returns (Form 1120 and Form 941), employer filings (Forms 941, 940), and frequently estimated tax obligations on top of the personal return. Each of those filings carries its own penalty structure when filed late, and each can be abated under federal law.

The penalty path for C-Corp entities is the same federal mechanism available to all taxpayers: check whether AEP already applied, request FTA if the period is still in the transition window, or file Form 843 with reasonable-cause or other grounds. What differs for C-Corp owners is which specific penalties most commonly apply and which substantiation arguments tend to succeed.

Common penalties for C-Corp entities

The penalties our practice most frequently abates for C-Corp clients are:

Failure to file (Form 1120)
Underpayment of estimated tax
Late deposit penalties

Each of these penalty types is addressable through Form 843. The substantiation differs by penalty type. A failure-to-file penalty on a Form 1065 partnership return, for example, requires reasonable-cause substantiation specific to why the partnership was unable to file on time. A late-deposit penalty on Form 941 employment taxes requires documentation of the deposit failure circumstances. Our practice handles the case-specific substantiation.

— C-Corp Practitioner Note —

For C-Corp entities, the abatement opportunity often spans multiple penalty types across multiple tax periods. A single Form 843 filing can encompass the entity's late-filed entity return, late-deposited employment taxes, and any individual-level penalties tied to the owner's pass-through reporting — provided each is substantiated separately within the same submission.

What still applies for C-Corp owners

C-Corp owners still see late-file, late-pay, and late-deposit assessments on entity returns, employment deposits, and owner-level estimates. AEP may prevent some of those penalties on eligible recent returns. When a notice already assessed the penalty, or the penalty was already paid, the work is transcript review and a request — FTA if the period is still requestable, otherwise reasonable cause and Form 843 under the ordinary refund statute.

The primary COVID-disaster Form 843 refund-claim window closed July 10, 2026. We do not treat that closed window as a live product. Reasonable cause, AEP, FTA on transition periods, and representation on balances are the current paths.

Entity Type

C-Corporation

Common IRS Forms

Form 1120, Form 941, Form 940

Abatement Form

Form 843

Authorization Form

Form 8821

Typical Resolution

60 — 120 days

How our practice handles C-Corp cases

Our practice represents C-Corp clients on a contingency basis: if we do not recover your penalties, you do not pay. The process is straightforward. You sign a Form 8821 authorizing our access to your IRS transcripts. We pull the transcripts, confirm exactly which penalties were assessed across which tax years, identify the appropriate abatement grounds for each, and prepare a single Form 843 covering the case in full.

Most C-Corp cases resolve within 60–120 days of mailing. The IRS issues the refund directly to your business — typically via direct deposit when account information is on file, or by mailed check otherwise. The refund includes both the abated penalty and any interest the IRS charged on that penalty. There are no follow-up filings required from your side once the abatement is granted.

The starting point is the calculator on this page. Enter your name, business email, and rough estimates of the penalties and interest your C-Corp paid. We respond with a refund estimate within one business day.

C-Corp IRS Penalty Abatement: The Refund Path for Business Owners