Washington family law calculators (2026)

Guideline estimates for Washington, each built from the statute and shown step by step. Pick a calculator to start, or scan the key numbers below.

Child Support Calculator

Washington Child Support Calculator

Washington combines both parents' net incomes, reads a per-child amount from the economic table in RCW 26.19.020, and assigns the paying parent a share proportional to income. The table was rewritten effective January 1, 2026 and now runs to $50,000 of combined monthly net income.

Table range: $2,200 to $50,000
Maximum share of net: 45%

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Key 2026 figures in Washington

Table range (Child support)

Combined monthly net income, effective January 1, 2026; previously capped at $12,000.

$2,200 to $50,000

Maximum share of net (Child support)

A parent's total support may not exceed 45% of net income except for good cause.

45%

Minimum per child (Child support)

Presumptive amount for a parent below 125% of the federal poverty guideline.

$50 / month

Shared residence (Child support)

A residential credit is a discretionary deviation, not an automatic adjustment.

No formula