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LegalText 26 U.S.C. § 6233 Interest and penalties us united_states_code code_section 26 INTERNAL REVENUE CODE 63 ASSESSMENT 6233 26 U.S.C. § 6233 current 119-100 2026-06-26 official https://uscode.house.gov/download/releasepoints/us/pl/119/100/xml_usc26@119-100.zip /us/usc/t26/s6233 data/legal/raw/us/code/title-26/usc26.xml 6a67b774774430d98f9a32c8acdc3dcbad27b86773fa6785a779e819cff7f65b a261f094809116f42a96648a3d5eee80fa010379d67412551c21dd5c900b27f4 e3a5d3bfd3ba10b36902a86b1024c749c56414073774cf833bfcc348a128d61a 2026-07-04 official
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26 U.S.C. § 6233 - Interest and penalties

Text

(a) Interest and penalties determined from reviewed year (1) In general Except to the extent provided in section 6226(c), in the case of a partnership adjustment for a reviewed year—

(A) interest shall be computed under paragraph (2), and

(B) the partnership shall be liable for any penalty, addition to tax, or additional amount as provided in paragraph (3).

(2) Determination of amount of interest The interest computed under this paragraph with respect to any partnership adjustment is the interest which would be determined under chapter 67 for the period beginning on the day after the return due date for the reviewed year and ending on the return due date for the adjustment year (or, if earlier, the date payment of the imputed underpayment is made). Proper adjustments in the amount determined under the preceding sentence shall be made for adjustments required for partnership taxable years after the reviewed year and before the adjustment year by reason of such partnership adjustment.

(3) Penalties Any penalty, addition to tax, or additional amount shall be determined at the partnership level as if such partnership had been an individual subject to tax under chapter 1 for the reviewed year and the imputed underpayment were an actual underpayment (or understatement) for such year.

(b) Interest and penalties with respect to adjustment year return (1) In general In the case of any failure to pay an imputed underpayment on the date prescribed therefor, the partnership shall be liable—

(A) for interest as determined under paragraph (2), and

(B) for any penalty, addition to tax, or additional amount as determined under paragraph (3).

(2) Interest Interest determined under this paragraph is the interest that would be determined by treating the imputed underpayment as an underpayment of tax imposed in the adjustment year.

(3) Penalties Penalties, additions to tax, or additional amounts determined under this paragraph are the penalties, additions to tax, or additional amounts that would be determined—

(A) by applying section 6651(a)(2) to such failure to pay, and

(B) by treating the imputed underpayment as an underpayment of tax for purposes of part II of subchapter A of chapter 68.

(c) Deposit to suspend interest For rules allowing deposits to suspend running of interest on potential underpayments, see section 6603.

(Added Pub. L. 11474, title XI, § 1101(c)(1), Nov. 2, 2015, 129 Stat. 633; amended Pub. L. 115141, div. U, title II, § 206(i), Mar. 23, 2018, 132 Stat. 1180.)

Notes

Editorial Notes

Prior ProvisionsA prior section 6233, added Pub. L. 98369, div. A, title VII, § 714(p)(1), July 18, 1984, 98 Stat. 964; amended Pub. L. 104188, title I, § 1307(c)(3)(B), Aug. 20, 1996, 110 Stat. 1782, related to extension to entities filing partnership returns, prior to repeal by Pub. L. 11474, title XI, § 1101(a), Nov. 2, 2015, 129 Stat. 625.

Amendments2018—Subsec. (c). Pub. L. 115141 added subsec. (c).

Statutory Notes and Related Subsidiaries

Effective Date of 2018 AmendmentAmendment by Pub. L. 115141 effective as if included in section 1101 of Pub. L. 11474, see section 207 of Pub. L. 115141, set out as a note under section 6031 of this title.

Effective DateSection applicable to returns filed for partnership taxable years beginning after Dec. 31, 2017, with certain exceptions, see section 1101(g) of Pub. L. 11474, set out as a note under section 6221 of this title.