Washington’s child support law, RCW chapter 26.19, was amended by 2025 c 272 effective January 1, 2026, and uses a 479-row per-child economic table reaching $50,000 in combined monthly income. This calculator’s table was dual-extracted with zero mismatches, applies a self-support reserve at 180% of the federal poverty level, and enforces a $50-per-child minimum order — every worked example in the Administrative Office of the Courts’ materials is reproduced exactly.
Key facts
| Model | Income shares, per-child economic table — RCW ch. 26.19 (as amended by 2025 c 272, eff. 2026-01-01) |
|---|---|
| Schedule | 479-row per-child table to $50,000/month |
| Self-support reserve | 180% of the federal poverty level |
| Minimum order | $50/child |
Official source: https://fortress.wa.gov/dshs/dcs/csestimatorweb/
Custody arrangements covered
- Per-child economic table applies across the standard custody calculation
Frequently asked questions
What law governs Washington child support?
RCW chapter 26.19, as amended by 2025 c 272, effective January 1, 2026.
How big is Washington’s schedule?
A 479-row per-child economic table reaching $50,000 per month in combined income.
What is Washington’s self-support reserve?
180% of the federal poverty level.
Is there a minimum order in Washington?
Yes — $50 per child.
Update history
- — Washington went live under RCW ch. 26.19 as amended (effective 2026-01-01), with the full 479-row per-child economic table to $50,000/month, a self-support reserve at 180% of the federal poverty level, and a $50/child minimum order.
This is an estimate, not a court order or legal advice.
It applies Washington’s published child support guidelines to numbers you enter, for informational
purposes only. A judge may deviate from the guideline amount. Using this calculator does not create an
attorney-client relationship. For advice about your situation, consult a family law attorney.