26 U.S.C. § 6651
Failure to file tax return or to pay tax
With respect to any return, the amount of the addition under paragraph (1) of subsection (a) shall be reduced by the amount of the addition under paragraph (2) of subsection (a) for any month (or fraction thereof) to which an addition to tax applies under both paragraphs (1) and (2). In any case described in the last sentence of subsection (a), the amount of the addition under paragraph (1) of subsection (a) shall not be reduced under the preceding sentence below the amount provided in such last sentence.
If the amount required to be shown as tax on a return is less than the amount shown as tax on such return, subsections (a)(2) and (b)(2) shall be applied by substituting such lower amount.
In the case of each month (or fraction thereof) beginning after the day described in paragraph (2) of this subsection, paragraphs (2) and (3) of subsection (a) shall be applied by substituting “1 percent” for “0.5 percent” each place it appears.
This section shall not apply to any failure to pay any estimated tax required to be paid by section 6654 or 6655.
In the case of an individual who files a return of tax on or before the due date for the return (including extensions), paragraphs (2) and (3) of subsection (a) shall each be applied by substituting “0.25” for “0.5” each place it appears for purposes of determining the addition to tax for any month during which an installment agreement under section 6159 is in effect for the payment of such tax.
For purposes of this section, any failure to comply with section 6226(b)(4)(A)(ii) shall be treated as a failure to pay the amount described in subclause (II) thereof and such amount shall be treated for purposes of this section as an amount shown as tax on a return specified in subsection (a)(1).
In the case of any return required to be filed in a calendar year beginning after 2020, the $435 dollar amount under subsection (a) shall be increased by an amount equal to such dollar amount multiplied by the cost-of-living adjustment determined under section 1(f)(3) for the calendar year determined by substituting “calendar year 2019” for “calendar year 2016” in subparagraph (A)(ii) thereof.
If any amount adjusted under paragraph (1) is not a multiple of $5, such amount shall be rounded to the next lowest multiple of $5.
For inflation adjustment of certain items in this section, see Revenue Procedures listed in a table under section 1 of this title.
2019—Subsec. (a). Pub. L. 116–94, § 402(a), substituted “$435” for “$330” in concluding provisions.
Pub. L. 116–25, § 3201(a), substituted “$330” for “$205” in concluding provisions.
Subsec. (j)(1). Pub. L. 116–94, § 402(b), substituted “$435” for “$330”.
Pub. L. 116–25, § 3201(b), substituted “2020” for “2014”, “$330” for “$205”, and “2019” for “2013”.
2018—Subsec. (i). Pub. L. 115–141, § 206(n)(1), added subsec. (i). Former subsec. (i) redesignated (j).
Subsec. (j). Pub. L. 115–141, § 401(a)(299)(A), which directed amendment of subsec. (i) by inserting “an amount equal to” after “increased by” and “for the calendar year” after “section 1(f)(3)”, was executed by making the insertions in subsec. (j) to reflect the probable intent of Congress and the redesignation of subsec. (i) as (j) by Pub. L. 115–141, § 206(n)(1), effective as if included in Pub. L. 114–74. See Amendment and Effective Date of 2018 Amendment notes below.
Pub. L. 115–141, § 206(n)(1), redesignated subsec. (i) as (j).
2017—Subsec. (i)(1). Pub. L. 115–97 substituted “for ‘calendar year 2016’ in subparagraph (A)(ii)” for “for ‘calendar year 1992’ in subparagraph (B)”.
2016—Subsec. (a). Pub. L. 114–125, § 921(a), substituted “$205” for “$135” in concluding provisions.
Subsec. (i)(1). Pub. L. 114–125, § 921(b), substituted “$205” for “$135”.
2014—Subsec. (i). Pub. L. 113–295 added subsec. (i).
2008—Subsec. (a). Pub. L. 110–245 substituted “$135” for “$100” in concluding provisions.
1998—Subsec. (h). Pub. L. 105–206 added subsec. (h).
1996—Subsec. (a)(3). Pub. L. 104–168, § 303(b)(2), substituted “21 calendar days from the date of notice and demand therefor (10 business days if the amount for which such notice and demand is made equals or exceeds $100,000)” for “10 days of the date of the notice and demand therefor”.
Subsec. (g). Pub. L. 104–168, § 1301(a), added subsec. (g).
1989—Subsec. (f). Pub. L. 101–239 added subsec. (f).
1987—Subsec. (e). Pub. L. 100–203 substituted “section 6654 or 6655” for “section 6154 or 6654”.
1986—Subsec. (c)(1). Pub. L. 99–514, § 1502(b), amended par. (1) generally, striking out the designation “(A)” before “With respect to”, inserting “(or fraction thereof)”, and striking out subpar. (B) which read as follows: “With respect to any return, the maximum amount of the addition permitted under paragraph (3) of subsection (a) shall be reduced by the amount of the addition under paragraph (1) of subsection (a) (determined without regard to the last sentence of such subsection) which is attributable to the tax for which the notice and demand is made and which is not paid within 10 days of notice and demand.”
Subsecs. (d), (e). Pub. L. 99–514, § 1502(a), added subsec. (d) and redesignated former subsec. (d) as (e).
1984—Subsec. (d). Pub. L. 98–369 in amending subsec. (d) generally, substituted in heading “estimated tax” for “declarations of estimated tax”, struck out provisions making section inapplicable to any failure to file a declaration of estimated tax required by section 6015 or to any failure to pay any estimated tax required to be paid by section 6153, and made section inapplicable to any failure to pay any estimated tax required to be paid by section 6654.
1982—Subsec. (a). Pub. L. 97–248, § 318(a), inserted provision that, in the case of a failure to file a return of tax imposed by chapter 1 within 60 days of the date prescribed for filing of such return (determined with regard to any extensions of time for filing), unless it is shown that such failure is due to reasonable cause and not due to willful neglect, the addition to tax under par. (1) shall not be less than the lesser of $100 or 100 percent of the amount required to be shown as tax on such return.
Subsec. (c)(1)(A). Pub. L. 97–248, § 318(b)(1), inserted provision that in any case described in last sentence of subsec. (a), the amount of the addition under par. (1) of subsec. (a) shall not be reduced under first sentence of this subpar. below the amount provided in such last sentence.
Subsec. (c)(1)(B). Pub. L. 97–248, § 318(b)(2), inserted “(determined without regard to the last sentence of such subsection)” after “paragraph (1) of subsection (a)”.
1976—Subsec. (e). Pub. L. 94–455 struck out subsec. (e) which related to certain interest equalization tax returns.
1971—Subsec. (e). Pub. L. 92–9 added subsec. (e).
1969—Subsec. (a). Pub. L. 91–172 designated existing provisions as par. (1) and added pars. (2) and (3).
Subsec. (b). Pub. L. 91–172 designated existing provisions as par. (1) and added pars. (2) and (3).
Subsecs. (c), (d). Pub. L. 91–172 added subsec. (c), redesignated former subsec. (c) as (d) and struck out reference to section 6016 of this title and provided that this section would not be applicable for failure to pay any estimated tax required under section 6153 or 6154 of this title.
1968—Subsec. (c). Pub. L. 90–364 struck out reference to section 6016.
Pub. L. 116–94, div. O, title IV, § 402(c),
Pub. L. 116–25, title III, § 3201(c),
Amendment by section 206(n)(1) of Pub. L. 115–141 effective as if included in section 1101 of Pub. L. 114–74, see section 207 of Pub. L. 115–141, set out as a note under section 6031 of this title.
Amendment by Pub. L. 115–97 applicable to taxable years beginning after
Pub. L. 114–125, title IX, § 921(c),
Pub. L. 113–295, div. B, title II, § 208(h),
[Pub. L. 115–141, div. U, title I, § 105(b),
Pub. L. 110–245, title III, § 303(b),
Pub. L. 105–206, title III, § 3303(b),
Amendment by section 303(b)(2) of Pub. L. 104–168 applicable in case of any notice and demand given after
Pub. L. 104–168, title XIII, § 1301(b),
Pub. L. 101–239, title VII, § 7741(b),
Amendment by Pub. L. 100–203 applicable to taxable years beginning after
Pub. L. 99–514, title XV, § 1502(c),
Amendment by Pub. L. 98–369 applicable with respect to taxable years beginning after
Pub. L. 97–248, title III, § 318(c),
Pub. L. 92–9, § 3(j)(3),
Pub. L. 91–172, title IX, § 943(d),
Amendment by Pub. L. 90–364 applicable with respect to taxable years beginning after
Pub. L. 105–206, title III, § 3707,