How support is calculated, modified, and enforced — from guidelines to college expenses.
Washington parents share extracurricular costs proportionally under RCW 26.19.080. Learn how courts divide sports fees, camps, and activity costs in divorce.
Pay child support in Washington via DCS Online portal, wage withholding, or MoneyGram. Filing fee $314-$364. 12% interest on late payments. Complete 2026 guide.
Child support is not taxable in Washington. Payers cannot deduct it; recipients owe zero tax. Full 2026 guide to IRS rules, dependents, and RCW 26.19.
Child support in Washington ends at age 18, or high school completion if later. Courts may extend support to age 23 for college or indefinitely for disabled children.
Use Washington's child support calculator under RCW 26.19. Updated for 2026 EHB 1014 changes: $50,000 income table, 180% self-support reserve, $2,200 minimum threshold.