Washington Child Support
The table lives in the statute. So it's computed here — as written.
Combined monthly net income drives a statutory table with per-child amounts for one through five children — presumptive to $50,000, with the statute's own guardrails: the 45-percent-of-net limit, the self-support reserve at 180 percent of the federal poverty level, the $50-per-child minimum, and written findings to exceed the ceiling. The mandatory WSCSS worksheets carry it in court; this engine shows the arithmetic.
Statute verified at render: the stored official text of RCW 26.19.020 carries the presumptive-table line — this calculator computes against that verified text (2025c272-effective-2026-01-01).
The inputs, organized (RCW 26.19 and friends)
Each parent's monthly NET income
Gross income minus the statutory deductions — income taxes, FICA, mandatory pension and union dues, and the rest of the RCW 26.19.071 list. Net, not gross, drives the table.
RCW 26.19.071
The mandatory WSCSS worksheets
Washington worksheets are not optional — RCW 26.19.035 requires the official Washington State Child Support Schedule worksheets in every proceeding, and the court's completed worksheet controls. Three-parent cases have their own official worksheets (named here, never imitated).
RCW 26.19.035
Daycare and special child-rearing expenses
Ride ON TOP of the basic obligation and share between the parents in proportion to income (RCW 26.19.080) — gather actual figures; the basic table amount does not include them.
RCW 26.19.080
Deviation standards
Income of a new spouse, other children, extraordinary debt, residential-schedule time, and the rest of the RCW 26.19.075 grounds — deviations take written findings; organize the facts, never assume the outcome.
RCW 26.19.075
The statutory limits
The 45-percent-of-net-income ceiling, the self-support reserve at 180 percent of the one-person federal poverty level, and the $50-per-child presumptive minimum (RCW 26.19.065) — the guardrails around every number.
RCW 26.19.065
Washington courts run the mandatory WSCSS worksheets on these same statutory inputs; this engine computes the economic-table basic obligation exactly as RCW 26.19.020 states it, shows its work, and is legal information — the court's own worksheet calculation controls.
Authority locked — retrieved from the hash-pinned corpus
Net income is the real work. RCW 26.19.071 defines the deductions from gross; daycare and special child-rearing expenses share proportionally ON TOP under RCW 26.19.080; deviations take RCW 26.19.075 findings; and the worksheets are MANDATORY in every proceeding (RCW 26.19.035) — three-parent cases have their own official worksheets this platform names and never imitates. Legal information, not legal advice.