Washington Child Support Guidelines (2026 Updates)
Calculating support for one child when the combined net income is $2,400 involves more than a simple table lookup. Factors like the Self-Support Reserve and local Thurston County rules often influence the final order.
Breakdown of the $2,400 Calculation
With a combined $2,400 per month, parents are expected to provide $521 in basic support for one child. The 2026 rules split this obligation based on each parent's proportional share of the $2,400.
Standard Mid-Income Calculation
Your $2,400 income falls within the standard economic schedule. This means the $521 figure is the presumptive legal standard. Want a complete breakdown including deviations and expenses? Calculate your full worksheet
Presumptive Amount
$521
Schedule Bracket
Standard Limit
The SSR and Low-Income Safeguards
A vital component of the 2026 system is the Self-Support Reserve (SSR), set at $2,394. If paying $521 would leave the payor with less than $2,394, the court may reduce the obligation for fairness.
Filing in Thurston County Superior Court
In Thurston County Superior Court, located in Olympia, child support orders based on a $2,400 combined income are filed with theThurston County Superior Court clerk at 2000 Lakeridge Dr SW, Olympia, WA 98502. Filing fees inThurston County are $250 - $314. Once filed, the presumptive$521/mo order for one child becomes the baseline unless either parent requests a deviation hearing.
Income Bracket Context
At $2,400/mo, this household falls in the lower income bracket of Washington's 2026 schedule — below the state median of $7,114/mo. At this level, SSR protections and low-income deviations are more likely to influence the final order than the presumptive $521 figure.
Deviation Likelihood in Thurston County
At the $2,400 level, deviation requests are less common but still possible in Thurston County. The most frequent grounds are extraordinary healthcare costs, shared custody arrangements, or documented debts. The presumptive $521 is upheld in the majority of standard cases at this income tier.
Children-Specific Insight
For one child at $2,400/mo, the $521 obligation reflects Washington's base rate. Parents adding a second child to the order would see this figure rise to $800 — an increase of $279 — reflecting the additional resources required under the 2026 schedule.
Related Income Tiers
Parents earning slightly more than $2,400 — at $2,500/mo — would face a presumptive order of $543/mo for one child in Washington. Those earning slightly less at $2,300/mo would owe $499/mo. These neighboring brackets help illustrate how Washington's 2026 schedule scales support incrementally with income.
Application in Thurston County Superior Court
While the 2026 economic schedule is uniform statewide, the Thurston County Superior Court handles procedural enforcement. In Thurston County, judges may require additional proof of income before finalizing the $521 order.
Calculation Summary & Requirements
Finalizing a support order at the $2,400 level requires attention to the 2026 guidelines. Since $521 is the starting point for one child, you can better prepare for the financial change in Thurston County, WA.
Accuracy & Legal Status
This page provides a generalized calculation for a $2,400 monthly net income under 2026 rules. The $521 figure for one child is presumptive and may be adjusted for insurance or daycare in Thurston County.