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Child Support in Mississippi

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

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Child Support Calculator
Estimate payments using Mississippi's Percentage of Income
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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?

Mississippi Child Support Facts — 2026

Formula modelPercentage of Income
Income basisNon-custodial parent only
Support ends at age21
Modification threshold15% income change
Arrears interest rate8% per year
Official agencyMississippi Child Support Agency ↗
Mississippi uses a percentage of the non-custodial parent's adjusted gross income. Support ends at 21.

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