Washington Child Support Calculator (2026)
In Washington, child support is based on both parents' combined income and the number of children. The total is split between you based on how much each parent earns, and parenting time can change the amount. Use the free calculator below for an instant estimate.
Source: WA Guidelines (RCW 26.19)
Calculate Your Washington Child Support
Free estimate — official Washington guidelines
Your income after taxes and required deductions
How Much Is Child Support in Washington?
If you make $60,000 a year in Washington, child support for 1 child is estimated at $794 per month ($9,528 per year). This assumes the other parent earns approximately $36,000/year. Actual amounts depend on both parents' incomes, custody time, and add-on expenses (child care, health insurance).
$1,000/week ($52,000/year): approximately $716/month for 1 child.
Washington Child Support Estimates by Income (2026)
| Annual Income | 1 Child | 2 Children | 3 Children |
|---|---|---|---|
| $40,000/yr | $619/mo | $939/mo | $939/mo |
| $50,000/yr | $691/mo | $1,047/mo | $1,258/mo |
| $60,000/yr | $794/mo | $1,200/mo | $1,438/mo |
| $70,000/yr | $869/mo | $1,312/mo | $1,571/mo |
| $80,000/yr | $950/mo | $1,432/mo | $1,711/mo |
| $100,000/yr | $1,070/mo | $1,630/mo | $1,957/mo |
| $120,000/yr | $1,229/mo | $1,902/mo | $2,294/mo |
Estimates assume the other parent earns 60% of your income. Actual amounts vary. Compare all states →
How Child Support Is Calculated in Washington
Factors That Affect Child Support in Washington
Technical details and legal basis
Washington uses the Income Shares model (WA Guidelines (RCW 26.19)) to calculate child support. This model combines both parents' incomes to determine the total obligation, then divides it proportionally based on each parent's share.
Important Notes for Washington
- • Washington uses the Income Shares model, combining both parents' net incomes to determine the total child support obligation.
- • The Economic Table was substantially revised by EHB 1014 (effective January 1, 2026), expanding the income range from $1,000–$12,000 to $2,200–$50,000 combined monthly net income.
- • Net income is calculated by deducting federal and state taxes, FICA, mandatory union dues, WA Paid Family Medical Leave, WA Cares Fund contributions, and certain other required deductions from gross income.
- • The self-support reserve is $2,394/month (180% of the 2026 federal poverty guideline for one person). A presumptive minimum order of $50 per child per month applies.
- • For combined monthly net income below $2,200, the obligation is based on the resources and living expenses of each household rather than the table.
- • The court may deviate from the standard calculation based on factors such as income of a new spouse, extraordinary debt, or special needs of the child.
Example Calculation
Scenario: Parent A earns $5,000/month, Parent B earns $3,000/month, 2 children.
Step 1: Combined income: $8,000
Step 2: Parent A's share: $5,000 / $8,000 = 62.5%
Step 3: Look up basic obligation for $8,000 combined and 2 children.
Step 4: Multiply by Parent A's share (62.5%).
Adjustments for health insurance, child care, and parenting time may apply.
Key Facts: Child Support in Washington
- Washington uses the Income Shares model, basing child support on both parents' combined net income.
- Under EHB 1014 (effective January 1, 2026), the Economic Table covers combined net income from $2,200 to $50,000/month. The basic obligation for 1 child ranges from approximately $477/month at $2,200 to $3,916/month at $50,000 combined monthly net income.
- The self-support reserve is $2,394/month (180% of the federal poverty guideline). A $50/child/month minimum order applies.
- Washington considers the residential schedule (parenting time) when calculating the final support amount.
- Net income deductions include federal and state taxes, FICA, mandatory union dues, WA Paid Family Medical Leave, and WA Cares Fund contributions.
Washington Child Support FAQ
How is child support calculated in Washington?
What income is used for Washington child support?
Does shared custody affect child support in Washington?
Can Washington courts deviate from the child support guidelines?
How long does child support last in Washington?
About This Calculator
Uses the official WA Guidelines (RCW 26.19) (2026 guidelines). Last verified: 2026-05-30.
Disclaimer: Estimates only, not legal advice. Actual amounts are set by Washington courts. Full disclaimer.
Methodology: Income Shares model per WA Guidelines (RCW 26.19).