Child Support Calculator
Estimate monthly child support obligations based on both parents' incomes and number of children. Useful for divorcing parents or attorneys planning custody arrangements.
About this calculator
This calculator uses an income-shares-inspired formula to estimate monthly child support. The payer contributes 20% of their monthly income per child group, while the receiver's income offsets 5% per child group. The formula is: Support = max(0, (payerIncome × 0.20 × numChildren) − (receiverIncome × 0.05 × numChildren)). The max(0, …) floor ensures the result never goes negative — support cannot be a negative liability. Higher payer income or more children increases the obligation, while higher receiver income reduces it. This is a simplified estimate; actual court orders vary by state and consider additional factors like healthcare, childcare, and custody time.
How to use
Suppose the paying parent earns $5,000/month, the receiving parent earns $2,000/month, and there are 2 children. Step 1: Payer contribution = $5,000 × 0.20 × 2 = $2,000. Step 2: Receiver offset = $2,000 × 0.05 × 2 = $200. Step 3: Support = max(0, $2,000 − $200) = $1,800/month. Enter your own income figures and number of children to get your personalized estimate instantly.
Frequently asked questions
How is monthly child support calculated using income from both parents?
This calculator combines both parents' incomes rather than looking at only the payer. The payer's income drives the base obligation at 20% per child group, while the receiver's income reduces it at 5% per child group. This reflects the principle that both parents share financial responsibility for the child. The result can never fall below zero, protecting against negative outcomes in edge cases.
Why does the receiving parent's income affect the child support amount?
Courts generally recognize that both parents have a duty to support their children financially. When the receiving parent earns more, their contribution to the household reduces the gap the payer must fill. In this formula, each dollar the receiver earns reduces the support obligation by $0.05 per child. This prevents the receiving parent from having a financial disincentive to earn income.
When should I use a child support calculator instead of relying on a lawyer?
A child support calculator is best used for quick estimates during early divorce planning, budgeting, or informal negotiations. It helps both parties enter mediation or attorney consultations with realistic expectations. However, final child support orders are set by courts and governed by state-specific guidelines that consider many additional factors. Always verify your results with a licensed family law attorney before making legal or financial decisions.