Child Support Guidelines in Washington
The model, the factors, and the official table for Washington.
Reference only — no accounts, no personal data collected.Washington sets child support through statewide guidelines. This page explains the calculation model Washington uses, the factors that go into it, and where to find the official support schedule.
The Model Used in Washington
Washington uses the Income Shares model. The guideline combines both parents' incomes as if the child lived in an intact household, then splits the obligation in proportion to each parent's share of that combined income.
Factors Washington Considers
- Combined gross income of both parents
- Allowable deductions (taxes, prior support, other children)
- Each parent's proportional share of the combined income
- Parenting time / overnights with the child
- Work-related childcare costs
- Health insurance premiums and uninsured medical expenses
- Educational or extraordinary expenses where the guidelines allow
Base Obligation Table
The dollar amounts come from the Washington Child Support Schedule, published by the Washington State Child Support. The schedule turns the inputs above into a monthly obligation. See the official schedule on the agency site: https://www.washingtonstatechildsupport.com/.
Washington uses an income-shares worksheet with a low-income adjustment.
Frequently Asked Questions
What model does Washington use for child support?
Washington uses the Income Shares model. See "The Model Used in Washington" above for how it works.
Does parenting time affect support in Washington?
Yes. Washington adjusts the obligation for the number of overnights the non-custodial parent has, because shared parenting lowers the custodial parent's direct costs.
Where do I find the official Washington support table?
The official schedule is published by the Washington State Child Support. A link is in the "Base Obligation Table" section above.
Is this the final amount I will pay or receive?
Not necessarily. Courts can deviate for extraordinary medical needs, private school, or travel costs. Use the official schedule or a family-law attorney for a case-specific number.