CAL. RTC. CODE § 23151 : California Code - Section 23151

(a) With the exception of banks and financial corporations, every corporation doing business within the limits of this state and not expressly exempted from taxation by the provisions of the Constitution of this state or by this part, shall annually pay to the state, for the privilege of exercising its corporate franchises within this state, a tax according to or measured by its net income, to be computed at the rate of 7.6 percent upon the basis of its net income for the next preceding income year, or if greater, the minimum tax specified in Section 23153.

(b) For calendar or fiscal years ending after June 30, 1973, the rate of tax shall be 9 percent instead of 7.6 percent as provided by subdivision (a).

(c) For calendar or fiscal years ending in 1980 to 1986, inclusive, the rate of tax shall be 9.6 percent.

(d) For calendar or fiscal years ending in 1987 to 1996, inclusive, and for any income year beginning before January 1, 1997, the tax rate shall be 9.3 percent.

(e) For any income year beginning on or after January 1, 1997, the tax rate shall be 8.84 percent. The change in rate provided in this subdivision shall be made without proration otherwise required by Section 24251.

(f) (1) For the first taxable year beginning on or after January 1, 2000, the tax imposed under this section shall be the sum of both of the following:

(A) A tax according to or measured by net income, to be computed at the rate of 8.84 percent upon the basis of the net income for the next preceding income year, but not less than the minimum tax specified in Section 23153.

(B) A tax according to or measured by net income, to be computed at the rate of 8.84 percent upon the basis of the net income for the first taxable year beginning on or after January 1, 2000, but not less than the minimum tax specified in Section 23153.

(2) Except as provided in paragraph (1), for taxable years beginning on or after January 1, 2000, the tax imposed under this section shall be a tax according to or measured by net income, to be computed at the rate of 8.84 percent upon the basis of the net income for that taxable year, but not less than the minimum tax specified in Section 23153. 23151.1. Notwithstanding Section 23151, every corporation (except banks and financial corporations) doing business within the limits of this state and not exempted from taxation by the provisions of the Constitution of this state or by this part, shall annually pay to the state for the privilege of exercising its corporate franchises within this state, a tax determined as follows:

(a) With respect to corporations, other than those described in subdivision (b), which commence doing business within the state after December 31, 1971, and before January 1, 2000, the tax for the taxable year of commencement, whether or not for 12 full months, shall be the minimum franchise tax prescribed in Section 23153.

(b) If after December 31, 1972, a corporation commences to do business and ceases doing business in the same taxable year, the tax for that taxable year shall be according to or measured by its net income for the year, to be computed at the rate prescribed in Section 23151.

(c) (1) With respect to taxable years beginning after December 31, 1972, and before January 1, 2000, other than the year of commencement described in subdivision (a) or (b) or the year of cessation described in subdivision (d), the tax for that taxable year shall be according to or measured by its net income for the next preceding taxable year, to be computed at the rate prescribed in Section 23151.

(2) With respect to taxable years beginning on or after January 1, 2000, (other than the first taxable year beginning on or after that date), the tax for the taxable year (including the taxable year of commencement and the taxable year of cessation) shall be according to or measured by its net income for the taxable year to be computed at the rate prescribed in Section 23151.

(d) With respect to corporations which cease doing business in a taxable year beginning after December 31, 1972, and before January 1, 2000, other than those described in subdivision (b), the tax for the taxable year of cessation shall be:

(1) According to or measured by its net income for the next preceding taxable year, to be computed at the rate prescribed in Section 23151, plus

(2) According to or measured by its net income for the taxable year during which the corporation ceased doing business, to be computed at the rate prescribed in Section 23151.

(e) In any event, the tax for any taxable year shall not be less than the minimum tax provided for in Section 23153 for that taxable year.