Washington Child Support Calculator

Free instant estimate based on Washington's Income Shares model (RCW §26.19)

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Select a state and enter your monthly gross income to see an estimated child support payment based on net income.

How Washington Calculates Child Support

Washington calculates child support using the Income Shares model as defined in RCW §26.19. Both parents' net incomes are combined to determine the total support obligation from the Washington State Child Support Schedule. Each parent's share is then allocated proportionally based on their percentage of the combined income.

Net income is calculated by taking gross income from all sources and subtracting federal income taxes, Social Security taxes, Medicare taxes, and other mandatory deductions. Washington has no state income tax. Health insurance premiums for the child and childcare costs are added to the base obligation. Extraordinary medical expenses are shared proportionally between the parents.

Washington provides a self-support reserve of $1,190 per month (2024) to protect low-income obligors. Notably, Washington may also order post-secondary education support for children attending college or vocational school. Standard calculation and deviation standards are available for unique circumstances.

Frequently Asked Questions

How does Washington calculate child support under the Income Shares method?
Washington uses the Income Shares Model under RCW §26.19. Both parents' net incomes are combined to determine the total support obligation from the Washington State Child Support Schedule. Each parent's share is then allocated proportionally based on their percentage of the combined income.
What is the self-support reserve in Washington?
Washington's self-support reserve is $1,190 per month (2024). If the obligor parent's income falls near this level, their child support obligation may be reduced to ensure they can meet their own basic living needs.
What counts as net income in Washington child support?
Net income includes all gross income from any source minus federal income taxes, Social Security taxes, Medicare taxes, and other mandatory deductions. Washington has no state income tax.
Does Washington consider both parents' income for child support?
Yes. Washington uses the Income Shares Model, which considers both parents' net incomes. The combined income determines the base support obligation from the state schedule, and each parent is responsible for their proportional share.
Can Washington order post-secondary education support?
Yes. Washington is one of the few states that may order post-secondary education support. The court can require parents to contribute to a child's college or vocational education expenses under certain circumstances, separate from regular child support.

Important Legal Disclaimer

The information provided on SupportCalc is for general informational and educational purposes only. Nothing on this website should be taken as legal advice. Child support calculations are estimates based on publicly available state guidelines and may not reflect the exact amount ordered by a court. Every case is unique, and many factors can affect the final support order. Please consult with a qualified family law attorney in your jurisdiction for advice specific to your situation.