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Child Support in Indiana

Free calculator, modification rules, arrears interest, and 50/50 custody guide for Indiana — 2026.

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Child Support Calculator
Estimate payments using Indiana's Income Shares
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Modification Checker
Does your income change qualify?
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Arrears Calculator
Past-due support with 8% interest
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50/50 Custody Guide
Does equal custody eliminate support?

Indiana Child Support Facts — 2026

Formula modelIncome Shares
Income basisBoth parents' income
Support ends at age19
Modification threshold20% income change
Arrears interest rate8% per year
Official agencyIndiana Child Support Agency ↗
Indiana uses Income Shares based on weekly gross income. Support ends at 19.

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