Free · Washington · Current law
Based on Washington's official Income Shares formula. Enter both parents' incomes and get an estimate in under a minute.
Before taxes — wages, self-employment, bonuses
A best estimate is fine for now
Taxes, mandatory retirement, union dues…
Work or school related
Estimated monthly support
The other parent pays you, the parent with primary timesharing.
Estimate only — based on a simplified reading of Washington State Child Support Economic Table, RCW 26.19.020 (effective January 1, 2026). Official calculator → A judge can deviate. Not legal advice.
Get a plain-English copy of this estimate, the numbers used, and a short checklist for what to review before relying on it.
In Washington, child support is calculated by first determining each parent's net income. These net incomes are combined to find the total combined monthly net income. This combined income, along with the number of children, is then used to find a basic support obligation from the state's economic table. Each parent's share of this basic obligation is proportional to their share of the combined net income. Additional expenses such as uninsured medical costs, health insurance premiums, childcare, education, and long-distance transportation may also be added and shared proportionally.
A substantial change in either parent's income — voluntary or involuntary — can trigger a modification.
Changes in childcare costs or the children's health insurance premiums directly adjust the support amount.
If the custody schedule changes significantly, support can be recalculated under Washington guidelines.
Medical conditions, disabilities, or educational needs can justify a departure from the guideline amount.
Common questions
Washington has a mandatory 90-day waiting period after the petition is filed and served before a divorce can be finalized. However, most divorces take longer, especially if there are disagreements between the parties.
While not legally required, it is strongly recommended to consult with a lawyer before filing for divorce in Washington. A lawyer can advise on important legal rights, property division, child custody, and support, even if you cannot afford full representation.
Yes, Washington is a no-fault divorce state. This means that neither party needs to prove fault for the divorce; irreconcilable differences are sufficient grounds.
Washington is a community property state. The court will make a just and equitable disposition of both community and separate property and liabilities, considering factors such as the nature and extent of the property, duration of the marriage, and economic circumstances of each spouse. (RCW 26.09.080)
Yes, in Washington state, pets are generally considered personal property and are subject to division like other assets during a divorce. The court will determine ownership based on various factors, but there are no specific laws granting pet custody in the same way as child custody.
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