Revenue and Taxation Code section 18171

Section 1250(b) of the Internal Revenue Code, relating to additional depreciation, is modified as follows:

(a)

“Depreciation adjustments,” as defined in Section 1250(b)(3) of the Internal Revenue Code, do not include the following:

(1)

For taxable years beginning on or after January 1, 1983, amortization under Section 17251 or under Section 188 of the Internal Revenue Code.

(2)

For taxable years beginning prior to January 1, 1983, amortization under former Section 17226, relating to pollution control facilities, or former Section 17227, relating to trademarks.

(b)

“Additional depreciation,” as defined in Section 1250(b)(4) of the Internal Revenue Code, includes the following:

(1)

For taxable years beginning on or after January 1, 1983, amortization under Section 167(k) of the Internal Revenue Code.

(2)

For taxable years beginning before January 1, 1983, amortization under former Section 17211.7, relating to low-income rental housing, or former Section 17228.5, relating to certified historic structures.

Source: Section 18171, https://leginfo.­legislature.­ca.­gov/faces/codes_displaySection.­xhtml?lawCode=RTC§ionNum=18171.­ (updated Jan. 1, 2004; accessed Jun. 18, 2026).

Green check means up to date. Up to date

Verified:
Jun. 18, 2026

§ 18171's source at ca​.gov