RCW 82A.04.310: Taxable income—Charitable contributions.

(1) In computing a taxpayer's Washington taxable income, the taxpayer may deduct from their Washington base income the amount of charitable contributions they claimed for the taxable year under section 170 of the internal revenue code to a qualified organization, up to a maximum deduction of $100,000 per individual, or in the case of spouses or domestic partners, their combined charitable deduction is limited to $100,000, regardless of whether they file joint or separate returns.

(2) For the purposes of this section, "qualified organization" has the same meaning as in RCW 82.87.080.