Calculatree

Child Support Calculator

A rough monthly estimate based on both incomes, the number of children, and parenting time.

Inputs

Updates live as you type

How it works

Most states use an income-shares model: both parents’ incomes fund a base obligation, split in proportion to earnings and adjusted for parenting time. This simplified version gives a ballpark; your state’s worksheet is authoritative.

Frequently asked questions

Why might the real number differ?

State guidelines add factors this estimate omits — health insurance, childcare, extraordinary medical costs, and income caps — and some states use a flat percentage of the payer’s income instead.

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