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Tax Fraud Penalty: Civil Fraud vs Criminal Tax Evasion
The tax fraud penalty comes in two forms that are easy to confuse: the civil fraud penalty under 26 U.S.C. 6663, which adds 75 percent of the part of an underpayment attributable to fraud and is assessed by the IRS, and criminal tax evasion under 26 U.S.C. 7201, a felony the Department of Justice prosecutes in court. All State Tax Resolution (Sabih Shafi, EA, IRS Enrolled Agent) starts these cases from the first call, handles the IRS civil and collection side directly, and brings in our partner tax attorney for the criminal defense side, so you work with one team.
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Two tracks, one common word: fraud
Civil fraud and criminal evasion share a trigger: an intentional effort to avoid tax. What differs is who acts, what they can impose and how the matter is decided. The civil fraud penalty is a money penalty added by the IRS to a tax bill. Criminal tax evasion is a federal crime, and the penalties are fines and prison.
The Internal Revenue Manual describes how they connect. IRM 25.1.6 says a civil fraud penalty case may be developed from the facts of a civil examination or may result from a case initiated by Criminal Investigation. Under IRM 25.1.2, if affirmative acts of fraud are established, the compliance employee must suspend collection or examination activity and notify the group manager and the fraud enforcement advisor, who recommends a referral to Criminal Investigation if criminal criteria are met. If criminal criteria are not met, or Criminal Investigation returns the case, the IRS considers the civil fraud penalty under IRC 6663 and/or the fraudulent failure to file penalty under IRC 6651(f).
The civil fraud penalty: 26 U.S.C. 6663
Under 6663(a), if any part of an underpayment of tax is due to fraud, an amount equal to 75 percent of the portion of the underpayment attributable to fraud is added to the tax. For comparison, the Internal Revenue Manual lists a 20 percent accuracy-related penalty for negligence or disregard of rules alongside the 75 percent fraud penalty on the portion of an underpayment due to fraud.
Two rules shape how the penalty works in practice:
The burden shifts after the IRS makes its showing. Under 6663(b), if the IRS establishes that any portion of an underpayment is attributable to fraud, the entire underpayment is treated as fraud except any portion the taxpayer establishes by a preponderance of the evidence is not.
A spouse is not automatically responsible. Under 6663(c), on a joint return the civil fraud penalty does not apply to a spouse unless some part of the underpayment is due to the fraud of that spouse. IRM 25.1.6 makes the same point: on a joint return, the fraud of one spouse cannot be used to impute fraud by the other spouse.
The manual also guards against overreach. IRM 25.1.6 says the fact that a taxpayer has tax due is not sufficient to assert the civil fraud penalty, and that an affirmative act of fraud must also be present. It defines willful intent to defraud as an intentional wrongdoing with the specific purpose of evading a tax believed by the taxpayer to be owing.
Criminal tax evasion: 26 U.S.C. 7201
Under section 7201, willfully attempting in any manner to evade or defeat any tax or its payment is a felony: a fine up to $100,000 ($500,000 for a corporation), up to 5 years in prison, or both, plus costs of prosecution. The Internal Revenue Manual notes that the fine provisions of 18 U.S.C. 3571 raise the maximum fine for a 26 U.S.C. 7201 violation to $250,000 for individuals.
The word that matters is "willfully." The manual says a willful failure to file a return, when coupled with affirmative acts or conduct from which an attempt may be inferred, would constitute an attempt to evade or defeat a tax. It also says the willful omission of a duty or the willful failure to perform a duty does not by itself constitute an attempt to evade or defeat a tax. In other words, the line between a late-filing problem and an evasion case turns on what else was done.
Other criminal tax provisions
Evasion is not the only charge in the Code:
False return, 26 U.S.C. 7206(1). Willfully making and signing a return under penalties of perjury that you do not believe to be true and correct as to every material matter is a felony: a fine up to $100,000 ($500,000 for a corporation), up to 3 years in prison, or both, plus costs of prosecution.
Willful failure to file or pay, 26 U.S.C. 7203. Willfully failing to pay tax, file a return, keep records or supply information when required is a misdemeanor: a fine up to $25,000 ($100,000 for a corporation), up to 1 year in prison, or both, plus costs of prosecution.
Obstruction, 26 U.S.C. 7212(a). Corruptly obstructing or impeding the due administration of the tax code is punishable by up to 3 years in prison.
These Code figures are not the ceiling. For an individual, 18 U.S.C. 3571 sets the maximum fine at the greatest of the Code amount, $250,000 for a felony, or $100,000 for a Class A misdemeanor, and section 7203's one-year maximum makes it a Class A misdemeanor.
Side by side
Law: civil fraud is 26 U.S.C. 6663. Criminal evasion is 26 U.S.C. 7201.
Who acts: the IRS assesses the civil penalty. The Department of Justice prosecutes criminal cases after a recommendation from IRS-CI.
What it imposes: civil fraud adds 75 percent of the portion of the underpayment attributable to fraud. Criminal evasion carries a fine up to $100,000 ($500,000 for a corporation), up to 5 years in prison, or both. For an individual, 18 U.S.C. 3571 raises the fine for a felony to up to $250,000.
Joint returns: the civil penalty does not apply to a spouse unless that spouse's fraud caused part of the underpayment.
Time limits: how far back can this reach?
Tax fraud is one of the areas where the clock runs longer. For criminal cases, 26 U.S.C. 6531 sets the general limit to bring a tax prosecution at 3 years after the offense, except 6 years for the listed offenses. The 6-year period covers willfully attempting to evade or defeat any tax or its payment, and willfully failing to pay any tax or make any return. It also covers offenses described in section 7206(1) and 7207, which are false statements and fraudulent documents. Time spent outside the United States or as a fugitive from justice is not counted in the limitation period.
On the civil side, 26 U.S.C. 6501(c) says that for a false or fraudulent return with intent to evade tax, or when no return is filed, the tax may be assessed or collected by court proceeding at any time. The ordinary assessment time limit does not protect a fraudulent return. The separate limit on collecting an assessed balance is covered in the statute of limitations on IRS collection.
What this means for you
If you are reading this because of a letter, three points follow from the law above. First, a civil fraud penalty is not a criminal charge, and neither follows automatically from owing tax. Second, the facts that matter are acts, not just numbers: what was done, by whom, and with what intent. Third, there is a formal way to come forward before the IRS finds a problem, and it has its own conditions; see the Voluntary Disclosure Practice guide. Missing returns are a related question, covered in unfiled tax returns.
Working with an Enrolled Agent
All State Tax Resolution is led by Sabih Shafi, EA, an IRS Enrolled Agent, and works with clients in every state and abroad by phone and video. We start your case from the first call, a free 20-minute review. We handle the IRS civil and collection side directly as an Enrolled Agent firm, including penalty questions and payment options, and when a case needs criminal defense, we bring in our partner tax attorney. You work with one team, and we do not promise any outcome.
Frequently Asked Questions
What is the tax fraud penalty?
The civil tax fraud penalty is found in 26 U.S.C. 6663(a): if any part of an underpayment is due to fraud, an amount equal to 75 percent of the portion attributable to fraud is added to the tax. It is a money penalty assessed by the IRS. It is separate from any criminal penalty for tax evasion, which is decided in court.
What is the difference between civil fraud and criminal tax evasion?
Civil fraud is an IRS penalty added to the tax under section 6663. Criminal tax evasion under section 7201 is a felony, with a fine up to $100,000 ($500,000 for a corporation), up to 5 years in prison, or both, plus costs of prosecution. For an individual, 18 U.S.C. 3571 raises the fine for a felony to up to $250,000. The IRS handles the first, while the Department of Justice prosecutes the second after a recommendation from IRS-CI.
How long can the IRS go back for tax fraud?
For criminal prosecution, 26 U.S.C. 6531 sets a general 3-year limit, extended to 6 years for evasion, willful failure to file or pay, and false returns under 7206(1). Time outside the United States is not counted. For civil assessment, section 6501(c) says tax on a false or fraudulent return, or when no return is filed, may be assessed at any time.
Is failing to file the same as tax evasion?
Not by itself. The Internal Revenue Manual says a willful failure to file does not per se constitute an attempt to evade a tax, but a willful failure to file coupled with affirmative acts or conduct from which an attempt may be inferred can. A failure to file can also be a misdemeanor under section 7203 if it is willful.
If I filed jointly, am I liable for my spouse's fraud penalty?
Not automatically. Under 26 U.S.C. 6663(c), the civil fraud penalty does not apply to a spouse on a joint return unless some part of the underpayment is due to the fraud of that spouse. IRM 25.1.6 says the fraud of one spouse cannot be used to impute fraud by the other spouse. Your own facts decide how that applies.
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Last reviewed: October 2026 by Sabih Shafi, EA
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This article is general information, not individual tax advice. If you want to talk through your own IRS situation, book a free 20-minute review or call or text us directly.
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