Unlike spousal maintenance, child support in Washington follows a structured formula. That doesn’t mean the result is automatic — accurate inputs and proper credits make a real difference — but the framework is consistent statewide.
An income-based model
Washington starts with both parents’ combined net income. That figure is applied to the state’s economic table to determine a basic monthly support obligation for the number of children involved. The obligation is then divided between the parents in proportion to their incomes — so a parent who earns more of the combined total generally carries more of the support.
What gets added in
Beyond the basic obligation, certain costs are added and shared between the parents, including:
- Health insurance premiums for the children
- Work-related day care and child care
- Certain extraordinary expenses, depending on the case
Does parenting time affect support?
It can. Both the residential schedule and each parent’s income feed into the calculation, so the final amount reflects the specifics of your arrangement rather than a flat rule.
When support can be modified
Child support orders aren’t frozen forever. A support order can be modified when there’s a substantial change in circumstances — for example, a significant change in either parent’s income or a meaningful change in the child’s needs. Modifications run in both directions: a parent may seek an increase, or a parent whose circumstances have genuinely changed may seek a reduction.
Getting the numbers right
Because the calculation depends on accurate income figures and the correct credits, errors or omissions can skew the result for years. Whether you’re establishing support, enforcing an existing order, or seeking a change, it pays to have the math reviewed carefully.
Our Spokane child support attorneys help parents establish accurate, fair orders and modify them when life changes. Contact Schwab Law or call (509) 795-1894.