Washington Child Support Calculator

Based on RCW § 26.19.020. Enter both parents' incomes and custody details to see a step-by-step estimate.

Learn how Washington calculates child support →

Income

Parent 1 gross income (monthly)

Parent 2 gross income (monthly)

Number of children

Parenting Time

Enter the number of overnights per year that Parent 1 has with the child(ren).

Overnights per year (Parent 1): 0 nights = 0%

Expenses

Monthly health insurance premium for child(ren)

Parent 1 pays

Parent 2 pays

Monthly childcare / work-related childcare costs

Parent 1 pays

Parent 2 pays

Your estimate will appear here

Enter both parents' incomes and custody details, then click Calculate support for a step-by-step breakdown.

Estimate only. This uses the published guidelines formula for Washington (RCW § 26.19.020) but is not legal advice. Actual court orders may differ based on factors not captured here. Consult a licensed family law attorney in your state.