This calculator provides an educational estimate only. Actual court orders may vary based on specific circumstances. This tool is not a substitute for legal advice from a qualified attorney. This is an estimate only, not legal advice.

This version has a limited scope. This version covers two parents with one primary residential household and no residential deviation. Shared or split residence, three-parent cases, other children, benefits, postsecondary support, ordinary-expense credits, low-income limitations, and cases reaching the 45 percent limit require separate review. Income preparation and taxes are not calculated here.

Which parent is the nonresidential paying parent?

Parent A

Parent B

The selected payer must be the parent with less residential time.

Parent A monthly guideline net income ($)Enter income already prepared under the state rules. Do not enter unadjusted wages or take-home pay.

Parent B monthly guideline net income ($)No taxes or income deductions are computed on this page.

Number of children

Residential scope

Parent A monthly childcare paid ($)Enter reasonable monthly daycare costs.

Parent A monthly child health cost paid ($)Enter child-only health premiums and uninsured healthcare costs. Do not count the same expense twice.

Parent B monthly childcare paid ($)Enter reasonable monthly daycare costs.

Parent B monthly child health cost paid ($)Enter child-only health premiums and uninsured healthcare costs. Do not count the same expense twice.

Other circumstances

How child support is estimated in Washington

The economic table gives a monthly amount per child, not a total family amount. This page multiplies that amount by the number of children. It uses combined guideline net monthly income and the nearest $100 row, with $50 midpoint ties rounded upward. The table contains 479 rows from $2,200 through $50,000 and five family-size columns.

Official sources and effective dates

Washington State Child Support Schedule, economic table and standards effective January 1, 2026, with worksheet instructions revised June 2026. See Allocation Standards 1 through 4, Limitation Standards 1 through 6, and worksheet lines 4 through 17.
RCW 26.19.020, the economic table adopted by 2025 chapter 272 section 14, effective January 1, 2026. The archived statute and schedule tables were compared cell by cell.
RCW 26.19.065, including the 2026 limitations, and the court reserve notice, effective January 13, 2026. The current reserve is $2,394 monthly, or 180 percent of the one-person poverty guideline.

Expenses and calculation

Healthcare and reasonable daycare costs are added in proportion to income, with direct-payment credits under worksheet lines 10 through 17. Ordinary-expense credits are not calculated here. This version approximates income shares by rounding Parent A's share to three decimals and using the complement for Parent B. This convention fits the official examples in Allocation Standard 1 and worksheet line 7, but the instructions do not mandate three-decimal rounding. Compared with full-precision shares, a review grid without add-ons found displayed differences of up to $6 and five changes between a computed estimate and a separate-review hold. Large add-ons can raise the difference to about $8. Incomes and costs are converted to whole cents, and the calculation uses exact integer arithmetic. Only the displayed final result rounds to a whole dollar for readability. That display choice is not a claim that the rules require whole-dollar orders.

A worked example

Parent A has $6,000 and Parent B has $4,000 guideline net monthly income. For two children, the $10,000 row gives $1,099 per child, or $2,198 total. Parent A's 0.600 share is $1,318.80, displayed as $1,319 without add-ons. This is an illustrative hand calculation, not a published official case example.

When separate review is required

This version holds all cases where either income or either basic share after support reaches the $2,394 reserve. It also holds calculated transfers reaching the 45 percent income limitation or the $50-per-child presumptive minimum. These are conservative scope holds, not automatic court findings. Above $50,000, below the schedule, more than five children, residential deviations, other children, benefits, three-parent cases, postsecondary support, and ordinary-expense credits require separate review.

Pending changes

The January 1, 2026 schedule is used with the June 2026 instructions. No later adopted table was located in the official materials reviewed on November 7, 2026. The poverty guideline and self-support reserve should be checked again when the next annual update is issued.

This is an educational estimate only, not legal advice. Compare the result with a current court worksheet. Entered figures are not submitted to us.