Children · July 9, 2026 · The SimplyDivorceOnline Team
How Is Child Support Calculated?
Child support isn't guesswork, most states use a formula based on income and parenting time. Here's what goes into the number.
Child support can feel mysterious, but most states calculate it with a fairly mechanical formula. Once you know the inputs, the output stops being a surprise.
It's based on a state guideline
Nearly every state uses a guideline formula rather than leaving the amount to a judge's mood. Plug in the numbers and you get a presumptive support figure that courts start from.
The main inputs
The biggest factors are each parent's income and how much time the children spend with each parent. Most states then adjust for costs like health insurance, childcare, and the number of children. More parenting time for the paying parent generally lowers the amount.
It's meant to follow the child
Support is the child's right, not the other parent's, it's intended to cover the child's needs and keep their standard of living stable across two homes. That's why courts are careful about it even in an otherwise amicable divorce.
When you complete your questionnaire, we walk you through your state's guideline so the number you put in your agreement matches what the court expects.