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Child Support in Alabama

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

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Child Support Calculator
Estimate payments using Alabama's Income Shares
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Modification Checker
Does your income change qualify?
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Arrears Calculator
Past-due support with 7.5% interest
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50/50 Custody Guide
Does equal custody eliminate support?

Alabama Child Support Facts — 2026

Formula modelIncome Shares
Income basisBoth parents' income
Support ends at age19
Modification threshold10% income change
Arrears interest rate7.5% per year
Official agencyAlabama Child Support Agency ↗
Alabama uses the Income Shares model. Support ends at age 19 or high school graduation.

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