Estimate monthly child support payments using the Income Shares model — the most widely used method in the U.S.
This tool provides a general estimate only and does not constitute legal advice. Actual child support orders are set by a family court judge and vary significantly based on state guidelines, custody arrangement, healthcare costs, childcare expenses, and other factors. This calculator uses a simplified income shares model. Results may differ substantially from your state's official guidelines. Consult a licensed family law attorney in your state.
Enter both parents' income and custody details to estimate monthly support.
Enter both parents' income and click Calculate to see an estimate.
⚠️ Estimate only — not legal advice. Results are for informational purposes only. Consult a licensed attorney before making any decisions.
Used by most U.S. states, income shares aims to ensure children receive the same financial support they would have if both parents lived together.
Both parents' gross monthly incomes are added together to determine the combined available income.
The total child support obligation is determined by applying a percentage based on the number of children to the combined income.
Each parent's share of the obligation is proportional to their share of the combined income. The higher-earning parent typically pays the difference.
This is a simplified estimate. Real child support orders use your state's official guidelines worksheet, which accounts for healthcare costs, childcare, custody time (parenting plan), prior support obligations, and other factors. Treat this as a ballpark figure only.
Gross income is your total income before taxes and deductions — wages, salary, bonuses, self-employment income, rental income, and in some states, investment income. Ask your attorney what your state includes in the definition.
Most states use income shares. Texas and Wisconsin use a percentage-of-income model, where support is calculated as a percentage of the paying parent's income only. The calculator notes which model your selected state uses.
Yes, in most states. A material change in circumstances — such as a significant income change, change in custody, or major new expense — can be grounds to request a modification through the court.
This calculator gives you a starting point. A family law attorney can walk you through your state's official worksheet and protect your rights.
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