Child Support Calculator
Estimate child support payments based on income and custody arrangements.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Child Support Calculator
- Enter Parent 1's Monthly Gross Income (in dollars). Use a positive number (e.g., 5000).
- Enter Parent 2's Monthly Gross Income (in dollars). Use a positive number (e.g., 3000).
- Enter Parent 1's Custody Percentage (0–100). Parent 2's percentage auto-calculates.
- Enter Monthly Child Expenses (e.g., 1000 for food, housing, etc.).
- Enter Extra Costs (e.g., education, medical) in dollars (optional, default 0).
- Click "Calculate Support" to see the estimated transfer amount and full breakdown.
Tip: All inputs must be non-negative numbers. The result shows the amount one parent pays the other based on income shares and custody difference.
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Frequently Asked Questions
You need monthly gross incomes of both parents, custody percentages, monthly child expenses, and extra costs like education or medical.
The calculator uses an income shares model: each parent contributes proportionally to their income, adjusted for custody time. The parent with less custody pays the difference.
No, this is for estimation only. Actual child support may vary by jurisdiction and additional factors. Consult a legal professional.