Washington Child Support Law Changes 2026 – What Parents Should Know
Washington’s child support rules changed on January 1, 2026. Engrossed House Bill 1014 expanded the economic table to combined monthly net incomes of $50,000, raised the self-support reserve from 125% to 180% of the federal poverty guideline, added new state-mandated deductions, and created a temporary reduction for parents in court-ordered behavioral health treatment.
If you are initiating or modifying a support order, these are the rules that govern the calculation. As a Seattle family law attorney, I recommend reviewing how they apply to your circumstances before you file.
Key Washington Child Support Law Changes in Effect for 2026
1. Expanded Economic Table Range
The economic table now covers combined monthly net incomes up to $50,000, raised from a $12,000 cap. For incomes above $12,000, support amounts are calculated using a formula rather than historical spending data.
For incomes under $12,000, the amounts remain the same as under the prior table. The updated schedule also eliminates amounts for combined incomes below $2,200 per month.
See the full table in the Washington State Child Support Schedule Pamphlet (PDF).
2. New Self-Support Reserve Standard
The self-support reserve — the amount a parent paying support must be left with after meeting their obligation — increased from 125% to 180% of the federal poverty guideline for a one-person household, with some exceptions.
3. Temporary Reduction for Behavioral Health Treatment
Parents in court-ordered behavioral health treatment may qualify for a reduced support amount of $50 per child, per month, during treatment.
4. New State-Mandated Deductions Allowed
Parents may now deduct the following from gross income when calculating support:
- Washington Paid Family and Medical Leave contributions
- Washington Cares long-term care trust contributions
- Other state-mandated insurance premiums
These deductions reflect required costs in modern household budgeting.
5. Revised Worksheets and Instructions
The Administrative Office of the Courts has issued updated worksheets and instructions reflecting the new income tiers, rounding adjustments, and deductions. The current forms — the WSCSS Schedule and Worksheets, revised June 2026 — are available from the Washington Courts forms library. Calculations run on earlier worksheets will not reflect the 2026 schedule.
How the 2026 Rules Apply to an Existing Support Order
The 2026 schedule alone can support a motion for adjustment if 24 months have passed since entry of the order or its last adjustment or modification. But the schedule does not automatically change an existing obligation — the court must enter a new order through an adjustment proceeding.
If 24 months have passed since entry or last adjustment
A party may seek an adjustment based solely on a change to the economic table or standards in chapter 26.19 RCW, without proving a substantial change of circumstances. RCW 26.09.170(9)(a)(ii).
If fewer than 24 months have passed
The new schedule alone is generally not sufficient. The moving party would need to establish a substantial change of circumstances or another specific statutory ground. RCW 26.09.170(5), (8).
Filing is required either way
A change to the schedule does not alter an existing order by itself. A party must file the appropriate motion or petition together with current child support worksheets. RCW 26.09.170(9)(b); RCW 26.09.175(1).
Adjustments run prospectively
Any resulting adjustment is ordinarily prospective from the filing date, not retroactive to the schedule’s January 1, 2026 effective date. RCW 26.09.170(1)(a).
If you are considering an adjustment, understanding how the expanded table, the higher self-support reserve, and the new deductions affect your numbers is worth doing before you file.
To learn more about how support is calculated, see our guide on Child Support in Washington State.
Need Help Navigating the 2026 Child Support Rules?
At Weintraub Law Office, we guide parents through every step of Washington’s child support process. Whether you’re modifying an existing order or starting from scratch, we can help you understand your rights under the current law.
Call Weintraub Law Office at +1 425 374 4045 or schedule an appointment with a trusted Seattle family law attorney.