Section 19164.
Cal. Revenue and Taxation Code - RTC § 19164.
in effect(a)
(1)
(A)
An accuracy-related penalty shall be imposed under this part and shall be determined in accordance with Section 6662 of the Internal Revenue Code, relating to imposition of accuracy-related penalty on underpayments, except as otherwise provided.
(B)
(i)
Except for understatements relating to reportable transactions to which Section 19164.5 applies, in the case of any proposed deficiency assessment issued after the last date of the amnesty period specified in Chapter 9.1 (commencing with Section 19730) for any taxable year beginning prior to January 1, 2003, the penalty specified in Section 6662(a) of the Internal Revenue Code shall be computed by substituting “40 percent” for “20
percent.”
(ii)
Clause (i) shall not apply to any taxable year of a taxpayer beginning prior to January 1, 2003, if, as of the start date of the amnesty program period specified in Section 19731, the taxpayer is then under audit by the Franchise Tax Board, or the taxpayer has filed a protest under Section 19041, or the taxpayer has filed an appeal under Section 19045, or the taxpayer is engaged in settlement negotiations under Section 19442, or the taxpayer has a pending judicial proceeding in any court of this state or in any federal court relating to the tax liability of the taxpayer for that taxable year.
(2)
With respect to corporations, this subdivision shall apply to all of the following:
(A)
All taxable years beginning on or after January 1, 1990.
(B)
Any other taxable year for which an assessment is made after July 16, 1991.
(C)
For purposes of this section, references in Section 6662(e) of the Internal Revenue Code and the regulations thereunder, relating to treatment of an affiliated group that files a consolidated federal return, are modified to apply to those entities required to be included in a combined report under Section 25101 or 25110. For these purposes, entities included in a combined report pursuant to paragraph (4) or (6) of subdivision (a) of Section 25110 shall be considered only to the extent required to be included in the combined report.
(3)
Section 6662(d)(1)(B) of the Internal Revenue Code is modified to provide that in the case of a corporation, other than an “S” corporation, there is a substantial understatement of tax for any taxable year if the amount of the understatement for the
taxable year exceeds the lesser of:
(A)
Ten percent of the tax required to be shown on the return for the taxable year (or, if greater, two thousand five hundred dollars ($2,500)).
(B)
Five million dollars ($5,000,000).
(4)
Section 6662(d)(2)(A) of the Internal Revenue Code is modified to additionally provide that the excess determined under Section 6662(d)(2)(A) of the Internal Revenue Code shall be determined without regard to items to which Section 19164.5 applies and without regard to items with respect to which a penalty is imposed by Section 19774.
(5)
The provisions of Sections 6662(e)(1) and 6662(h)(2) of the Internal Revenue Code shall apply to returns filed on or after January 1, 2010.
(b)
The amendments made by Section 605(a)(2) of Public Law 117-328 adding Sections 6662(b)(10) and 6662(h)(2)(D) to, and amending Section 6664(c)(2) of, the Internal Revenue Code, relating to application of accuracy-related penalties, shall apply to returns filed on or after January 1, 2024.
(c)
For purposes of Section 6662(d) of the Internal Revenue Code, Section 6664 of the Internal Revenue Code, Section 6694(a)(1) of the Internal Revenue Code, and this part, the Franchise Tax Board may prescribe a list of positions for which the Franchise Tax Board believes there is not substantial authority or there is no reasonable belief that the tax treatment is more likely than not the proper tax treatment. That list (and any revisions thereof) shall be published through the use of Franchise Tax Board Notices or other published positions. In addition, the “listed transactions” identified and published pursuant to the preceding sentence shall be published on the internet website of the Franchise Tax Board.
(d)
A fraud penalty shall be imposed under this part and shall be determined in accordance with Section 6663 of the Internal Revenue Code, relating to imposition of fraud penalty, except as otherwise provided.
(e)
(1)
Section 6664 of the Internal Revenue Code, relating to definitions and special rules, shall apply, except as otherwise provided.
(2)
Section 6664(c)(3) of the Internal Revenue Code shall apply to returns filed on or after January 1, 2010.
(3)
Section 6664(c)(4) of the Internal Revenue Code shall apply to appraisals prepared with respect to returns or submissions filed on or after January 1, 2010.
(f)
Except for purposes of subdivision (e) of Section 19774, Section 6662(b)(6) of the Internal Revenue Code shall not apply.
(g)
Except for purposes of subdivision (e) of Section 19774, Section 6662(i) of the Internal Revenue Code, relating to increase in penalty in case of nondisclosed noneconomic substance transactions, shall not apply.
(h)
Section 6665 of the Internal Revenue Code, relating to applicable rules, shall apply, except as otherwise provided.
(i)
The amendments made to this section by Chapter 14 of the Statutes of 2011 shall apply to notices mailed on or after January 1, 2012.
References
referencesCal. Revenue and Taxation Code - RTC § 19164.5.
referencesCal. Revenue and Taxation Code - RTC § 19730.
referencesCal. Revenue and Taxation Code - RTC § 6662.
referencesCal. Revenue and Taxation Code - RTC § 19731.
referencesCal. Revenue and Taxation Code - RTC § 19041.
referencesCal. Revenue and Taxation Code - RTC § 19045.
referencesCal. Revenue and Taxation Code - RTC § 19442.
referencesCal. Revenue and Taxation Code - RTC § 25101.
referencesCal. Revenue and Taxation Code - RTC § 25110.
referencesCal. Revenue and Taxation Code - RTC § 19774.
referencesCal. Revenue and Taxation Code - RTC § 605.
referencesCal. Revenue and Taxation Code - RTC § 6664.
referencesCal. Revenue and Taxation Code - RTC § 6694.
Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026