Washington Child Support Guidelines (2026 Updates)
Calculating support for one child when the combined net income is $12,900 involves more than a simple table lookup. Factors like the Self-Support Reserve and local Franklin County rules often influence the final order.
Breakdown of the $12,900 Calculation
With a combined $12,900 per month, parents are expected to provide $1,668 in basic support for one child. The 2026 rules split this obligation based on each parent's proportional share of the $12,900.
High-Income Notice
Because your combined income of $12,900 exceeds the $12,000 statutory ceiling, the $1,668 base is a minimum starting point. Judges in Franklin County, WA have discretion to increase support proportional to the family's standard of living. Want a complete breakdown including deviations and expenses? Calculate your full worksheet
Note: The 45% net income cap remains a vital legal defense.
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 $1,668 would leave the payor with less than $2,394, the court may reduce the obligation for fairness.
Filing in Franklin County Superior Court
In Franklin County Superior Court, located in Pasco, child support orders based on a $12,900 combined income are filed with theBenton/Franklin Superior Court clerk at 1016 N 4th Ave, Pasco, WA 99301. Filing fees inFranklin County are $250 - $314. Once filed, the presumptive$1,668/mo order for one child becomes the baseline unless either parent requests a deviation hearing.
Income Bracket Context
At $12,900/mo, this household falls in the upper income bracket of Washington's 2026 schedule — above the state median of $7,114/mo. At this level, courts have wider discretion to order above the presumptive $1,668, particularly for lifestyle-based deviation arguments in Franklin County.
Deviation Likelihood in Franklin County
High-income deviation arguments are frequently raised in Franklin County at the $12,900 level. Since the schedule caps at $12,000 combined net income, the $1,668 figure is a floor — not a ceiling. Attorneys often argue for upward deviations based on the children's established standard of living and available parental resources.
Children-Specific Insight
For one child at $12,900/mo, the $1,668 obligation reflects Washington's base rate. Parents adding a second child to the order would see this figure rise to $2,536 — an increase of $868 — reflecting the additional resources required under the 2026 schedule.
Related Income Tiers
Parents earning slightly more than $12,900 — at $13,000/mo — would face a presumptive order of $1,678/mo for one child in Washington. Those earning slightly less at $12,800/mo would owe $1,657/mo. These neighboring brackets help illustrate how Washington's 2026 schedule scales support incrementally with income.
Application in Franklin County Superior Court
While the 2026 economic schedule is uniform statewide, the Benton/Franklin Superior Court handles procedural enforcement. In Franklin County, judges may require additional proof of income before finalizing the $1,668 order.
Calculation Summary & Requirements
Finalizing a support order at the $12,900 level requires attention to the 2026 guidelines. Since $1,668 is the starting point for one child, you can better prepare for the financial change in Franklin County, WA.
Accuracy & Legal Status
This page provides a generalized calculation for a $12,900 monthly net income under 2026 rules. The $1,668 figure for one child is presumptive and may be adjusted for insurance or daycare in Franklin County.