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26 U.S.C. § 6663

U.S. CodeFederal
Imposition of fraud penalty
About This Law
/us/usc/t26/s6663
Title
26 — Internal Revenue Code
Chapter
STF/CH68
Release
119-84
Release Date
2026-04-17

Section Text

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(a) Imposition of penaltyIf any part of any underpayment of tax required to be shown on a return is due to fraud, there shall be added to the tax an amount equal to 75 percent of the portion of the underpayment which is attributable to fraud. (b) Determination of portion attributable to fraudIf the Secretary establishes that any portion of an underpayment is attributable to fraud, the entire underpayment shall be treated as attributable to fraud, except with respect to any portion of the underpayment which the taxpayer establishes (by a preponderance of the evidence) is not attributable to fraud. (c) Special rule for joint returnsIn the case of a joint return, this section shall not apply with respect to a spouse unless some part of the underpayment is due to the fraud of such spouse. (Added Pub. L. 101–239, title VII, § 7721(a), Dec. 19, 1989, 103 Stat. 2397.) Statutory Notes and Related Subsidiaries Effective DateSection applicable to returns the due date for which (determined without regard to extensions) is after Dec. 31, 1989, see section 7721(d) of Pub. L. 101–239, set out as an Effective Date of 1989 Amendment note under section 461 of this title.

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