US 2028 Child Support Formula

2028 child support: 70% states use Income Shares model. 9 states Percentage of Obligor. 3 states Melson Formula (DE, HI, MT). All consider both incomes + custody time.

Paying parent monthly gross ($)

Receiving parent monthly gross ($)

Number of children

Paying parent overnights/yr

Monthly Support

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Income Share

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Combined base obligation	—
Paying parent share	—
% time with paying parent	—
Monthly child support 2028	—

Child support formulas 2028: 70% of states use Income Shares model — combined income → state-set obligation table → split by each parent's income %. Adjusted for: child care, health insurance, extraordinary expenses, time-sharing (50/50 custody often eliminates support entirely). 9 states use Percentage of Obligor (paying parent only). 3 states use Melson Formula (DE, HI, MT).

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Last updated May 2026. Sources: ABA.