TAXPAYER PENALTIES AND INTEREST — A Minimal, Complete Overview

by | Jun 16, 2026 | IRS Representation

Tax penalties exist to enforce compliance with filing, reporting, and payment rules. Most penalties arise from late filing, late payment, underpayment, or incorrect reporting. Penalties may be civil or criminal, and fines are not deductible for tax purposes. (“There are many types of tax penalties… Taxpayers may incur civil or criminal penalties…”)

Civil Penalties

Civil penalties are monetary additions to tax.

  • Ad valorem penalties are percentage‑based.

  • Assessable penalties are fixed dollar amounts and not reviewable by Tax Court. (“Ad valorem penalties are additions… Assessable penalties are a flat dollar amount… not reviewable by the tax court…”)

Failure‑to‑File

  • 5% per month of unpaid tax, up to 25%.

  • Fraudulent failure‑to‑file: 15% per month, up to 75%.

  • Based on tax unpaid by the original due date. (“The failure‑to‑file penalty is usually 5%… up to 25%… fraudulent… up to 75%.”)

Failure‑to‑Pay

  • 0.5% per month, up to 25%.

  • Reduced to 0.25% per month during an installment agreement.

  • Increases to 1% after a levy notice or notice and demand. (“The failure‑to‑pay penalty is usually one‑half of 1%… rate will increase to 1%…”)

Combined Penalties

When both apply, the failure‑to‑file penalty is reduced by the failure‑to‑pay amount. (“The 5%… failure‑to‑file penalty is reduced by the failure‑to‑pay penalty.”)

Accuracy‑Related Penalty

20% of underpaid tax for:

  • Negligence or disregard of rules

  • Substantial understatement (greater of $5,000 or 10% of correct tax; 5% if §199A applies) (“A penalty of 20%… negligence… substantial understatement…”)

Frivolous Submissions

$5,000 penalty for frivolous returns or submissions. (“A penalty of $5,000 may be due…”)

Civil Fraud

75% of underpayment due to fraud. IRS must show intent; burden then shifts to taxpayer. (“The IRS will add a civil fraud penalty of 75%… burden of proof shifts…”)

Missing SSN

$50 per missing or incorrect SSN/ITIN. (“Penalty of $50 for each failure.”)

Right to Challenge Penalties

Taxpayers may challenge penalties at any stage:

  • Pre‑assessment review

  • Post‑assessment abatement

  • Refund claim after payment (“Taxpayers have the right to challenge… at any stage…”)

Arbitration is available only in Appeals after settlement discussions fail. (“Arbitration is not an option prior to assessment…”)

First‑Time Abatement (FTA)

FTA applies to failure‑to‑file, failure‑to‑pay, and failure‑to‑deposit penalties if:

  • No penalties in prior 3 years

  • All required returns filed or extended

  • All tax paid or arranged to be paid (“A taxpayer may qualify… if all the following are true…”)

The failure‑to‑pay penalty continues to accrue until full payment. (“It may be to the taxpayer’s advantage to wait…”)

Reasonable Cause Relief

Penalties may be removed if the taxpayer exercised ordinary care but could not comply due to:

  • Death

  • Serious illness

  • Unavoidable absence

  • Inability to obtain records

  • Reliance on written IRS advice or professional advice (“Reasonable cause involves situations… death, serious illness… reliance on advice…”)

Form 843 is used to request abatement. (“A taxpayer may use Form 843…”)

Trust Fund Recovery Penalty (TFRP)

The TFRP applies when trust fund taxes (withheld income tax and employee FICA) are not collected or paid. Penalty equals 100% of unpaid trust fund tax. (“Penalty is equal to the full amount of the unpaid trust fund tax…”)

IRS identifies responsible persons who acted willfully. Paying other expenses instead of trust fund taxes is willful behavior. (“Paying other business expenses… is considered willful behavior.”)

IRS sends a proposed assessment letter; taxpayer has 60 days to appeal. (“The taxpayer has 60 days… to appeal…”)

Suspension of Interest and Certain Penalties

If IRS does not issue a notice of liability within 36 months of the later of:

  • Filing date, or

  • Original due date then interest and certain penalties are suspended. (“Interest and certain penalties will be suspended…”)

Suspension does not apply to:

  • Failure‑to‑pay

  • Fraud

  • Listed transactions

  • Criminal penalties (“The suspension does not apply to the following…”)

Seeking Relief From Improper Interest

If interest was assessed during a period that should have been suspended, taxpayers may file Form 843 with “Section 6404(g) Notification.” (“Submit Form 843… IRS will review…”)

Abatement of Interest

Interest is not removed for reasonable cause or FTA. Interest may be abated only for IRS ministerial or managerial errors. (“The IRS may only abate… if the interest is due to an unreasonable error or delay…”)

Stopping Interest From Accruing

Taxpayers may send a payment during examination to stop interest on that amount. (“Interest… will stop accruing on the date the IRS receives this money.”)

Criminal Penalties

Criminal penalties apply only in extreme cases and require willfulness. (“Criminal tax penalties are rarely imposed…”)

Key statutes include:

  • §7201 – Attempt to evade tax (felony; up to 5 years)

  • §7202 – Willful failure to collect/pay over tax

  • §7203 – Willful failure to file or supply information

  • §7206 – Fraud and false statements

  • §7212 – Interference with IRS administration

  • 18 USC §371 – Conspiracy to defraud the United States

Fines follow 18 USC §3571, which increases maximum penalties. (“18 USC § 3571 raises the maximum permissible fines…”)