Child Support Calculators by State

Two formula families

Child support is a formula everywhere — the constitution of the formula is what changes. Percentage-of-income states take a share of the paying parent's income that rises with the number of children, sometimes with an income cap or tiers by income bracket. Income-shares states, the larger group, start from both parents' combined income, look up the amount a family at that income would spend on the children, and split it in proportion to each parent's share — so the receiving parent's income matters too. A few states apply a percentage to the combined income directly. On top of the guideline amount, courts add or subtract for health insurance, child-care costs and parenting time, and may deviate with written findings.

The comparison table shows which model each covered state uses, with the actual percentages and caps.

How to use these calculators

Enter the incomes the page asks for (one parent's or both, depending on the model), the number of children and, where the state uses them, the extras. Read the guideline amount together with the statute cited and the review date. Coverage grows in batches: the states here are the ones whose guideline we have verified line by line; the rest are added as they pass the same check.

Guides

• Child Support Formulas: Percentage of Income vs Income Shares