Child Support Calculator
Quick answer: Enter parents' incomes and custody split to estimate child support obligations.
Estimate monthly child support obligations using the income shares model — the method used by most U.S. states. Enter both parents' gross monthly income, number of children, and custody arrangement to calculate each parent's share of the basic support obligation. This is an estimate only; actual orders are set by courts.
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Last reviewed: April 2026Report an error
Parent 1: 20% · Parent 2: 80%
Estimated Monthly Support
$1,250
Basic support obligation: $2,000/mo. Parent 1 (non-custodial) pays est. $1,250/mo ($15,000/yr). This is a guideline estimate only.
Combined Income
$8,000/mo
Basic Obligation
$2,000/mo
Parent 1 Share
$1,250/mo
Parent 2 Share
$750/mo
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How to Use This Child Support Calculator
- 1Enter Parent 1 gross monthly income.
- 2Enter Parent 2 gross monthly income.
- 3Enter the number of children.
- 4Enter Parent 1's custody percentage.
- 5Read estimated monthly child support and each parent's share.
Frequently Asked Questions
- The income shares model calculates support based on both parents' combined income and the principle that children should receive the same proportion of parental income they would have if the family were intact. Used by ~40 states.
- This provides an approximation based on national averages. Actual child support orders vary significantly by state, may include add-ons for childcare/medical, and are set by the court.
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