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Taxpayer & Practitioner
Penalties

Master the civil and criminal penalties that apply to taxpayers and tax practitioners, including accuracy-related penalties, fraud penalties, and preparer sanctions.

CPA Regulation (REG)

What Are Tax Penalties?

Tax penalties are monetary sanctions imposed by the IRS on taxpayers and tax practitioners who fail to comply with the Internal Revenue Code. They serve two purposes: deterrence and revenue protection.

Taxpayer Penalties
Imposed on individuals and entities for filing failures, underpayments, and fraud
Practitioner Penalties
Imposed on CPAs, attorneys, and enrolled agents for improper preparation or conduct

Civil vs. Criminal Penalties

Civil Penalties Monetary fines No imprisonment Preponderance of evidence Examples: Failure to file Accuracy-related
Civil fraud (\( 75\% \))
Criminal Penalties Fines + imprisonment Intent required (willful) Beyond reasonable doubt Examples: Tax evasion Willful failure to file Filing false return vs.

Why Penalties Matter on the CPA Exam

Penalty questions appear frequently on the REG section. You must know the specific penalty rates, the triggers that cause each penalty, and the defenses available to taxpayers and practitioners.

1
Rates and thresholds: Memorize the key percentages: \( 5\% \), \( 20\% \), \( 75\% \)
2
Trigger conditions: Know what conduct activates each penalty
3
Defenses: Reasonable cause, substantial authority, and disclosure can reduce or eliminate penalties

Failure to File vs. Failure to Pay

Failure to File
\( 5\% \) per month of unpaid tax, up to a maximum of \( 25\% \). Minimum penalty applies for returns filed >60 days late: the lesser of a specific inflation-adjusted amount (e.g., \( \$485 \) for 2024) or \( 100\% \) of unpaid tax.
Failure to Pay
\( 0.5\% \) per month of unpaid tax, up to a maximum of \( 25\% \). Reduced to \( 0.25\% \) if an installment agreement is in effect.

Accuracy-Related Penalties: \( 20\% \)

The accuracy-related penalty under IRC §6662 imposes a \( 20\% \) penalty on the underpayment attributable to certain causes. These are the most frequently tested taxpayer penalties.

1
Negligence or disregard of rules and regulations
2
Substantial understatement of income tax: exceeds the greater of \( 10\% \) of the correct tax or \( \$5{,}000 \)
3
Substantial valuation misstatement: claimed value is \( \geq 150\% \) of actual value
4
Gross valuation misstatement: claimed value is \( \geq 200\% \) of actual value: penalty increases to \( 40\% \)

The Civil Fraud Penalty: \( 75\% \)

\( 20\% \)
\( 40\% \)
\( 75\% \)
Accuracy Negligence / Understatement Gross Valuation
Value \(\geq 200\%\)
of correct Civil Fraud Intentional underpayment Increasing Severity

Taxpayer Defenses Against Penalties

Defense Applies To Effect
Reasonable Cause Filing / payment / accuracy Eliminates penalty
Substantial Authority Substantial understatement Eliminates \( 20\% \) penalty
Adequate Disclosure Negligence / understatement Reduces or eliminates
Reliance on Advisor All accuracy penalties May eliminate if qualified

Practitioner Penalties: IRC §6694

Tax return preparers face two tiers of penalties under IRC §6694 for understating a taxpayer's liability. The tier depends on the level of culpability.

§6694(a): Unreasonable Position
Penalty: the greater of \( \$1{,}000 \) or \( 50\% \) of income earned from the return. Applies when position lacks substantial authority (or reasonable basis if disclosed).
§6694(b): Willful or Reckless
Penalty: the greater of \( \$5{,}000 \) or \( 75\% \) of income earned from the return. Applies to willful understatement or reckless disregard of rules.

Additional Preparer Penalties

§6695: Administrative
Failure to sign returns, provide copies, retain records, or furnish PTIN: \( \$55 \) per failure (for 2024), up to an annual maximum of \( \$29{,}000 \).
§6701: Aiding Understatement
Penalty of \( \$1{,}000 \) per individual return (\( \$10{,}000 \) per corporate return) for aiding in preparation of an understatement
§6713: Disclosure
Unauthorized disclosure or use of taxpayer information: \( \$250 \) per disclosure (up to \( \$10{,}000 \) per year)

Circular 230: Professional Standards

Treasury Department Circular 230 governs practice before the IRS. Violations can result in censure, suspension, disbarment, or monetary penalties, which generally cannot exceed the gross income derived from the conduct.

1
Due diligence: Must exercise reasonable care in preparing and filing returns
2
Tax return positions: Must not sign a return with a position lacking a reasonable basis. A higher "more likely than not" standard applies to tax shelters.
3
Conflicts of interest: Must not represent conflicting interests unless all parties provide informed written consent
4
Records return: Must promptly return client records upon request, regardless of fee disputes

Identifying Penalties: Step-by-Step

1
Identify the actor: Is the penalty targeting the taxpayer or the practitioner?
2
Classify the conduct: Was it negligence, willful, reckless, or fraudulent?
3
Match the penalty: Apply the correct IRC section and percentage or dollar amount
4
Check for defenses: Can reasonable cause, disclosure, or substantial authority reduce or eliminate it?
5
Verify stacking rules: Confirm whether multiple penalties can apply simultaneously

Example 1: Late Filing

1
Failure to file: \( 5\% \times \$10{,}000 \times 3 \text{ months} = \$1{,}500 \), but reduced by failure-to-pay: net \( 4.5\% \times \$10{,}000 \times 3 = \$1{,}350 \)
2
Failure to pay: \( 0.5\% \times \$10{,}000 \times 3 = \$150 \)
3
Total: \( \$1{,}350 + \$150 = \$1{,}500 \) (which equals \( 5\% \times 3 \) months of the unpaid tax)

Example 2: Substantial Understatement

1
Understatement amount: \( \$40{,}000 - \$28{,}000 = \$12{,}000 \)
2
Threshold test: Greater of \( 10\% \times \$40{,}000 = \$4{,}000 \) or \( \$5{,}000 \). Threshold = \( \$5{,}000 \)
3
Result: \( \$12{,}000 > \$5{,}000 \) so it is a substantial understatement. Penalty = \( 20\% \times \$12{,}000 = \$2{,}400 \)

Example 3: Preparer Penalty

1
Identify the section: IRC §6694(a): unreasonable position (no substantial authority, no disclosure)
2
Calculate: Greater of \( \$1{,}000 \) or \( 50\% \times \$3{,}000 = \$1{,}500 \)
3
Penalty: \( \$1{,}500 \) (the \( 50\% \) of fee amount is greater)

Common Mistakes

✕ Stacking Fraud + Accuracy
The \( 75\% \) fraud penalty and the \( 20\% \) accuracy-related penalty do not apply to the same underpayment. Only the fraud penalty applies.
✕ Wrong Filing Penalty Rate
Failure to file is \( 5\% \) per month, not \( 0.5\% \). Failure to pay is \( 0.5\% \). Confusing the two is a common trap on the exam.
✕ Mixing Up §6694(a) and (b)
§6694(a) is \( \$1{,}000 \) / \( 50\% \) for unreasonable positions. §6694(b) is \( \$5{,}000 \) / \( 75\% \) for willful conduct. They do not stack.

Penalty Summary Table

Penalty Rate / Amount IRC Section Target
Failure to File \( 5\% \)/month (max \( 25\% \)) §6651(a)(1) Taxpayer
Failure to Pay \( 0.5\% \)/month (max \( 25\% \)) §6651(a)(2) Taxpayer
Accuracy-Related \( 20\% \) of underpayment §6662 Taxpayer
Civil Fraud \( 75\% \) of underpayment §6663 Taxpayer
Unreasonable Position \( \$1{,}000 \) or \( 50\% \) fee §6694(a) Preparer
Willful / Reckless \( \$5{,}000 \) or \( 75\% \) fee §6694(b) Preparer

Question 1 of 5

A taxpayer files their return 4 months late with no reasonable cause. The unpaid tax is \( \$8{,}000 \). What is the failure-to-file penalty (before any reduction for failure-to-pay)?

Question 2 of 5

Which of the following is not an accuracy-related penalty under IRC §6662?

Question 3 of 5

A CPA willfully understated a client's tax liability and earned \( \$4{,}000 \) in fees. What is the preparer penalty under IRC §6694(b)?

Question 4 of 5

A taxpayer's correct liability is \( \$60{,}000 \). They reported \( \$47{,}000 \). The position had substantial authority. Is the accuracy-related penalty applicable?

Question 5 of 5

Under Circular 230, which sanction can the Office of Professional Responsibility impose on a practitioner who violates its standards?