Chapter 2.5 - Alternative Minimum Tax

California Revenue and Taxation Code — §§ 23400-23459

Sections (8)

Amended by Stats. 2025, Ch. 231, Sec. 76. (SB 711) Effective October 1, 2025.

(a)For the purpose of this chapter, Part VI of Subchapter A of Chapter 1 of Subtitle A of the Internal Revenue Code, relating to alternative minimum tax, shall apply as it read on January 1, 2015, except as otherwise provided.
(b)A corporation electing under Chapter 4.5 (commencing with Section 23800) to be treated as an “S corporation” shall not be subject to the tax imposed by this chapter.

Amended by Stats. 2025, Ch. 231, Sec. 77. (SB 711) Effective October 1, 2025.

(a)There shall be allowed as a credit against the regular tax (as defined by subdivision (c) of Section 23455), for any taxable year, an amount equal to the minimum tax credit for that taxable year.
(b)For purposes of subdivision (a), the minimum tax credit shall be determined in accordance with Section 53 of the Internal Revenue Code, except as otherwise provided in this part.
(c)For purposes of this chapter, the amount determined under Section 53(c)(1) of the Internal Revenue Code shall be the regular tax as defined by subdivision (c) of Section 23455, reduced by the sum of the credits

allowable under this part other than any credit which reduces the tax below the tentative minimum tax, as defined by Section 23455.

(d)Section 53(e) of the Internal Revenue Code, relating to the application to applicable corporations, shall not apply.

Amended by Stats. 2025, Ch. 231, Sec. 78. (SB 711) Effective October 1, 2025.

For purposes of this part, Section 55 of the Internal Revenue Code is modified as follows:

(a)Section 55(b)(1) of the Internal Revenue Code, relating to the amount of tentative minimum tax, is modified by requiring the tentative minimum tax for the taxable year to be imposed as follows:
(1)With respect to corporations subject to tax under Chapter 2 (commencing with Section 23101), other than banks or financial corporations, according to or measured by net income, for the privilege of doing business within this state, at a rate of 7 percent upon the basis of so much of the alternative minimum taxable income

for the taxable year as exceeds the exemption amount.

(2)With respect to corporations subject to tax under Chapter 3 (commencing with Section 23501), on net income from sources within this state, at a rate of 7 percent upon the basis of so much of the alternative minimum taxable income for the taxable year as exceeds the exemption amount.
(3)With respect to organizations or trusts subject to tax under Article 2 (commencing with Section 23731) of Chapter 4, on the unrelated business income from sources within this state, at a rate of 7 percent upon the basis of so much of the alternative taxable income for the taxable year as exceeds the exemption amount.
(4)With respect to banks subject to tax under Section 23181, according

to or measured by net income, for the privilege of doing

business within this state, in an amount equal to the sum of the following:

(A)At a rate of 7 percent upon the basis of so much of the alternative minimum taxable income as exceeds the exemption amount.
(B)At the rate determined under Section 23186, less the rate prescribed by Section 23151, upon the basis of net income for the taxable year.
(5)With respect to financial corporations subject to tax under Section 23183, according to or measured by net income, for the privilege of doing business within this state, in an amount equal to the sum of the following:
(A)At a rate of 7 percent upon the basis of so much of the alternative

minimum taxable income as exceeds the exemption amount.

(B)At the rate determined under Section 23186, less the rate prescribed by Section 23151, upon the basis of net income for the taxable year.
(b)Section 55(b)(2) of the Internal Revenue Code, relating to the definition of alternative minimum taxable income, is modified as follows:
(1)For corporations whose net income is determined under Chapter 17 (commencing with Section 25101), alternative minimum taxable income shall be allocated and apportioned in the same manner as net income is allocated and apportioned for purposes of the regular tax.
(2)With respect to taxpayers subject to Article 4

(commencing with Section 23221) of Chapter 2, Article 4 (commencing with Section 23221) to Article 9 (commencing with Section 23361), inclusive, shall apply to the tax imposed by this section except that Section 23221 shall not apply.

(3)For purposes of computing the alternative minimum tax for taxable years in which a taxpayer commenced doing business, dissolves, withdraws, or ceases doing business, Sections 18601, 23151, 23151.1, 23151.2, 23181, 23183, 23183.1, 23183.2, 23201 to 23204, inclusive, 23222 to 23224.5, inclusive, 23282, 23332.5, and 23504 shall be applied with due regard for the rate and alternative minimum taxable income prescribed by this chapter.
(c)Section 55(c) of the Internal Revenue Code, relating to the definition of regular tax, is modified to

read:

(1)For purposes of this chapter, “regular tax” means the amount of tax imposed under Chapter 2 (commencing with Section 23101) or Chapter 3 (commencing with Section 23501) or Article 2 (commencing with Section 23731) of Chapter 4, but does not include any amount imposed under paragraph (1) of subdivision (e) of Section 24667 or paragraph (2) of subdivision (f) of Section 24667.
(2)The tax specified in paragraph (1) shall be the amount determined prior to reduction by any credits against the tax.
(3)The amendments made to Section 55(c)(1) of the Internal Revenue Code by Section 12001(b)(4) of the Tax Cuts and Jobs

Act, 2017 (Public Law 115-97), shall apply.

(d)The rate of 7 percent prescribed in subdivision (a) shall be 6.65 percent for any taxable year beginning on or after January 1, 1997. The change in rate provided in this subdivision shall be made without proration otherwise required by Section 24251.

Added by Stats. 1998, Ch. 322, Sec. 64. Effective August 20, 1998.

Section 55(e) of the Internal Revenue Code, relating to exemption for small corporations, shall not apply.

Amended by Stats. 2025, Ch. 231, Sec. 79. (SB 711) Effective October 1, 2025.

For purposes of this part, Section 56 of the Internal Revenue Code is modified as follows:

(a)(1) Section 56(a)(2) of the Internal Revenue Code, relating to mining exploration and development costs, shall apply only to expenses incurred during taxable years beginning on or after January 1, 1988.
(2)Section 56(a)(5) of the Internal Revenue Code, relating to pollution control facilities, shall apply only to amounts allowable as a deduction under Section 24372.3.
(b)For purposes of applying Section 56(d) of the Internal Revenue Code, all references to “December

31, 1986,” are modified to read “December 31, 1987,” and all references to “January 1, 1987,” are modified to read “January 1, 1988.”

(c)Section 56(d)(1) of the Internal Revenue Code is modified to include the provisions of Section 25108.
(d)Section 56(g) of the Internal Revenue Code, relating to

adjustments based on adjusted current earnings, is modified to provide that for corporations whose income is determined under Chapter 17 (commencing with Section 25101), adjusted current earnings shall be allocated and apportioned in the same manner as net income is allocated and apportioned for purposes of the regular tax. In addition, each of the following shall apply:

(1)Sections 56(g)(1)(A) and 56(g)(3) of the Internal Revenue Code are modified to provide that the term “adjusted current earnings” means the sum of the adjusted current earnings of that corporation apportionable to this state and the adjusted current earnings allocable to this state.
(2)Section 56(g)(1)(B) of the Internal Revenue Code is modified to provide that the term “alternative minimum taxable

income” means the sum of the alternative minimum taxable income of that corporation apportionable to this state and the alternative minimum taxable income allocable to this state.

(e)Section 56(g)(4)(A) of the Internal Revenue Code is modified to provide the following:
(1)In the case of any property placed in service on or after January 1, 1981, and prior to January 1, 1987, other than residential rental property for which an election was made under former Section 24349.5, the amount allowable as depreciation or amortization with respect to that property shall be the same amount that would have been allowable for the taxable year had the taxpayer depreciated the property under the straight line method for each taxable year of the useful life (determined without regard to

Section 24354.2) for which the taxpayer has held the property.

(2)In the case of any property placed in service on or after January 1, 1987, and prior to January 1, 1990, other than residential rental property for which an election was made under former Section 24349.5, the amount allowable as depreciation or amortization with respect to that property shall be determined by each of the following:
(A)Taking into account the adjusted basis of that property (as determined for purposes of computing alternative minimum taxable income) as of the close of the last taxable year beginning before January 1, 1990.
(B)Using the straight line method over the remainder of the recovery period applicable to that property under the

alternative system of Section 168(g) of the Internal Revenue Code.

(3)The amendments made to paragraph (2) by the act adding this paragraph shall apply to taxable years beginning on or after January 1, 1990.
(4)The last sentence of Section 56(g)(4)(A)(i) of the Internal Revenue Code, shall not apply to taxable years beginning before January 1, 1998.
(f)(1) Section 56(g)(4)(C) of the Internal Revenue Code, relating to disallowance of items not deductible in computing earnings and profits, shall be modified as follows:

(A) (i) A deduction shall be allowed for amounts allowable as a deduction for purposes of the

regular tax under Sections 24402, 24410, 24411, and 25106.

(ii) For each taxable year beginning on or after January 1, 1990, a deduction shall be allowed for amounts allowable as a deduction to a credit union for purposes of the regular tax under Section 24405.

(B) Section 56(g)(4)(C)(ii) of the Internal Revenue Code, relating to special rule for certain dividends, shall not be applicable.

(C) Section 56(g)(4)(C)(iii) of the Internal Revenue Code, relating to treatment of taxes on dividends from 936 corporations, shall not be applicable.

(D) Section 56(g)(4)(C)(iv) of the Internal Revenue Code, relating to special rule for certain dividends received by

certain cooperatives, shall not be applicable.

(2)Section 56(g)(4)(D)(ii) of the Internal Revenue Code is modified to specify that Sections 24364 and 24407 shall not apply to expenditures paid or incurred in taxable years beginning on or after January 1, 1990.
(3)With respect to corporations that are not subject to the tax imposed under Chapter 2 (commencing with Section 23101), the amount of interest income included in the adjusted current earnings shall not exceed the amount of interest income included for purposes of the regular tax.
(4)Appropriate adjustments shall be made to limit deductions from adjusted current earnings for interest expense in accordance with the provisions of Sections 24344 and

24425.

Repealed and added by Stats. 2025, Ch. 231, Sec. 82. (SB 711) Effective October 1, 2025.

Section 56A of the Internal Revenue Code, relating to adjusted financial statement income, shall not apply.

Amended by Stats. 2002, Ch. 488, Sec. 8.5. Effective September 12, 2002.

For purposes of this part, Section 57 of the Internal Revenue Code is modified as follows:

(a)Section 57(a)(5) of the Internal Revenue Code, relating to tax-exempt interest, shall not be applicable.
(b)Section 57(a)(6) of the Internal Revenue Code, relating to accelerated depreciation or amortization on certain property placed in service before January 1, 1987, is modified to read: With respect to each property as described in

Section 1250(c) of the Internal Revenue Code as that provision read on April 1, 1970, the amount by which the deduction allowable for the taxable year for exhaustion, wear, tear, obsolescence, or amortization exceeds the depreciation deduction that would have been allowable for the taxable year, had the taxpayer depreciated the property under the straight line method for each taxable year of its useful life (determined without regard to Section 24354.2 or 24381) for which the taxpayer has held the property.

Amended by Stats. 1991, Ch. 117, Sec. 50. Effective July 16, 1991.

For purposes of this part, the provisions of Section 59 of the Internal Revenue Code are modified as follows:

(a)Section 59(a) of the Internal Revenue Code, relating to the alternative minimum tax foreign tax credit, shall not be applicable.
(b)Section 59(b) of the Internal Revenue Code, relating to income eligible for the credit under Section 936 of the Internal Revenue Code, shall not be applicable.
(c)Subparagraphs (A), (B),

and (C) of Section 59(e)(2) of the Internal Revenue Code, relating to qualified expenditures, are modified to refer to:

(1)Section 24364, in lieu of the deduction under Section 173 of the Internal Revenue Code.
(2)Section 24423, in lieu of the deduction under Section 263(c) of the Internal Revenue Code.