USC 2024 ed., current through 2025-01-06 · current text · last amended by Pub. L. 117-328
(a) Imposition of penalty If this section applies to any portion of an underpayment of tax required to be shown on a return, there shall be added to the tax an amount equal to 20 percent of the portion of the underpayment to which this section applies.
(b) Portion of underpayment to which section applies This section shall apply to the portion of any underpayment which is attributable to 1 or more of the following:
(1) Negligence or disregard of rules or regulations.
(2) Any substantial understatement of income tax.
(3) Any substantial valuation misstatement under chapter 1.
(4) Any substantial overstatement of pension liabilities.
(5) Any substantial estate or gift tax valuation understatement.
(6) Any disallowance of claimed tax benefits by reason of a transaction lacking economic substance (within the meaning of
section 7701(o)) or failing to meet the requirements of any similar rule of law.
(7) Any undisclosed foreign financial asset understatement.
(8) Any inconsistent estate basis.
This section shall not apply to any portion of an underpayment on which a penalty is imposed under
section 6663. Except as provided in paragraph (1) or (2)(B) of
section 6662A(e), this section shall not apply to the portion of any underpayment which is attributable to a reportable transaction understatement on which a penalty is imposed under
section 6662A.
(c) Negligence For purposes of this section, the term "negligence" includes any failure to make a reasonable attempt to comply with the provisions of this title, and the term "disregard" includes any careless, reckless, or intentional disregard.
(g) Substantial estate or gift tax valuation understatement
(1) In general For purposes of this section, there is a substantial estate or gift tax valuation understatement if the value of any property claimed on any return of tax imposed by subtitle B is 65 percent or less of the amount determined to be the correct amount of such valuation.
(2) Limitation No penalty shall be imposed by reason of
subsection (b)(5) unless the portion of the underpayment attributable to substantial estate or gift tax valuation understatements for the taxable period (or, in the case of the tax imposed by chapter 11, with respect to the estate of the decedent) exceeds $5,000.
(i) Increase in penalty in case of nondisclosed noneconomic substance transactions
(1) In general In the case of any portion of an underpayment which is attributable to one or more nondisclosed noneconomic substance transactions,
subsection (a) shall be applied with respect to such portion by substituting "40 percent" for "20 percent".
(2) Nondisclosed noneconomic substance transactions For purposes of this subsection, the term "nondisclosed noneconomic substance transaction" means any portion of a transaction described in
subsection (b)(6) with respect to which the relevant facts affecting the tax treatment are not adequately disclosed in the return nor in a statement attached to the return.
(3) Special rule for amended returns In no event shall any amendment or supplement to a return of tax be taken into account for purposes of this subsection if the amendment or supplement is filed after the earlier of the date the taxpayer is first contacted by the Secretary regarding the examination of the return or such other date as is specified by the Secretary.
(j) Undisclosed foreign financial asset understatement
(1) In general For purposes of this section, the term "undisclosed foreign financial asset understatement" means, for any taxable year, the portion of the understatement for such taxable year which is attributable to any transaction involving an undisclosed foreign financial asset.
(2) Undisclosed foreign financial asset For purposes of this subsection, the term "undisclosed foreign financial asset" means, with respect to any taxable year, any asset with respect to which information was required to be provided under
section 6038,
6038B,
6038D,
6046A, or
6048 for such taxable year but was not provided by the taxpayer as required under the provisions of those sections.
(3) Increase in penalty for undisclosed foreign financial asset understatements In the case of any portion of an underpayment which is attributable to any undisclosed foreign financial asset understatement,
subsection (a) shall be applied with respect to such portion by substituting "40 percent" for "20 percent".