WASHINGTON SUPPORT GUIDELINE
Washington child support calculator & worksheet
Washington child support uses state-specific income definitions and guideline rules. A base child support worksheet is available with the scope and exclusions listed below. Use this guide to check income requirements, sources, and limits before completing your worksheet.
Current module status
| State | Washington |
|---|---|
| Status | Active base worksheet module |
| Guideline model | income shares monthly table |
| Primary income field | Combined monthly net income |
What the worksheet asks for
The calculator workflow starts with the selected state, then walks through both parties’ income, assets, debts, and state-specific particulars. Countable income streams feed each party’s formula income; balances and non-automated adjustments are disclosed separately. Common categories include wages, bonuses, dividends and interest, business or company income, self-employment adjustments, existing support obligations, debts assigned by order, health insurance, child care, tuition, extraordinary expenses, and parenting time.
Sources and limits
- Uses RCW 26.19.020 Washington child support economic table effective January 1, 2026.
- The economic table gives a monthly basic support obligation per child; this module multiplies the selected per-child amount by the number of children, then allocates the total between parents by each parent’s share of combined monthly net income under RCW 26.19.080.
- The table is presumptive through combined monthly net income of $50,000; above that, the court may exceed the $50,000 amount only with written findings.
- For combined monthly net income below $2,200, Washington bases the obligation on household resources and living expenses with a statutory minimum; this module does not invent that discretionary low-income result.
- Healthcare, daycare, special child-rearing costs, tax/debt income derivation, self-support reserve, 45% limitation, deviations, split custody and shared residential schedules require the full Washington worksheet.
Official Washington source used for review
Run the calculator
Open the free support calculator, select Washington, complete the state worksheet, and print or export the output for review.
Frequently asked questions
Is this the official Washington court calculator?
No. It is an independent educational estimate. Courts can order a different amount when the evidence, local rules, or statutory deviation factors justify it.
Can I use the output in court?
The worksheet output is designed to be clear and printable, but each litigant is responsible for checking local filing rules and attaching any required official court forms.