District of Columbia Code Division VIII. General Laws. § 47-1807.02. Tax on corporations--Levy and rates.

(1) For 1 taxable year beginning after December 31, 1974, a tax at the rate of 12% upon the taxable income of every corporation, whether domestic or foreign;

(2) For the taxable years beginning after December 31, 1975, a tax at the rate of 9% upon the taxable income of every corporation, whether domestic or foreign, except that, effective October 1, 1984, the rate of tax shall be 10% upon the taxable income for any taxable period, except that for taxable years beginning after December 31, 1994, the rate of tax shall be 9.5%;

(3) For the taxable years beginning after December 31, 2002, a tax at the rate of 9.5% upon the taxable income of every corporation, whether domestic or foreign.

(3A) A surtax at the rate of 2.5% on the tax determined under paragraph (2) or (3) of this subsection, as applicable, for any tax period beginning after September 30, 1992.

(3B) A surtax at the rate of 2.5%, separate from and in addition to, the surtax imposed by paragraph (3A) of this subsection, on the tax determined under paragraph (2) or (3) of this subsection, as applicable, for any tax period beginning after September 30, 1994.

(4) For the taxable years beginning after December 31, 2003, a tax at the rate of 9.975% upon the taxable income of every corporation, whether domestic or foreign.

(5) For the taxable year beginning after December 31, 2014, but before January 1, 2016, a tax at the rate of 9.4% upon the taxable income of every corporation, whether domestic or foreign;

(6) For the taxable year beginning after December 31, 2015, but before January 1, 2017, a tax at the rate of 9.2% upon the taxable income of every corporation, whether domestic or foreign;

(7) For the taxable year beginning after December 31, 2016, but before January 1, 2018, a tax at the rate of 9.0% upon the taxable income of every corporation, whether domestic or foreign; and

(8) For taxable years beginning after December 31, 2017, a tax at the rate of 8.25% upon the taxable income of every corporation, whether domestic or foreign.