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.
Worked Example: How the Expanded Table Changes the Numbers
Consider two parents in King County with two children, ages 8 and 11:
- Marcus — monthly net income of $11,000
- Elena — monthly net income of $7,000
- Combined monthly net income: $18,000
Because their combined net income exceeds $12,000, this family falls squarely in the range the 2026 economic table extended. Here is the same household run through both schedules:
| Worksheet Line | Prior Schedule | 2026 Schedule |
|---|---|---|
| Combined monthly net income | $18,000 | $18,000 |
| Basic obligation — child 1 | $1,190 | $1,677 |
| Basic obligation — child 2 | $1,190 | $1,677 |
| Total basic support obligation | $2,380 | $3,354 |
| Marcus — proportional share | 61.1% | 61.1% |
| Elena — proportional share | 38.9% | 38.9% |
| Marcus — monthly obligation | $1,454.18 | $2,049.29 |
| Elena — proportional share of obligation | $925.82 | $1,304.71 |
Under the prior schedule, Marcus’s obligation was $1,454.18 per month. Under the 2026 schedule it is $2,049.29 — an increase of $595.11 per month, or roughly $7,141 per year, on identical income.
The proportional shares are unchanged: Marcus earns 61.1% of the combined net income and Elena 38.9% under either schedule. What changed is the size of the total obligation being divided — $2,380 under the prior table, $3,354 under the 2026 table.
Where these figures come from. The $1,190 is not a calculation. It is the two-child amount at the $12,000 row of the economic table — the prior schedule’s ceiling. A family earning $18,000 was assigned the $12,000 value because the table stopped there. The 2026 table gives $18,000 its own row: $1,677 per child. Amounts at and below $12,000 are unchanged between the two schedules, so the entire difference here comes from the table extending upward.
One qualification. These are basic support obligations from worksheet line 7. The worksheet continues from this point to account for health care and day care costs, other special expenses, residential credit, and any deviation the court allows, so the figure in an entered order may differ.
This example is illustrative, based on the Washington State Child Support Schedule worksheets effective January 1, 2026. It is not legal advice and does not account for every factor a court considers. Your result depends on your own circumstances.
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.