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Child Support in Texas

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

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Child Support Calculator
Estimate payments using Texas'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 6% interest
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50/50 Custody Guide
Does equal custody eliminate support?

Texas Child Support Facts — 2026

Formula modelPercentage of Income
Income basisNon-custodial parent only
Support ends at age18
Modification threshold20% income change
Arrears interest rate6% per year
Income cap$11,700/month
Official agencyTexas Child Support Agency ↗
Texas uses a percentage of the non-custodial parent's monthly net resources up to $11,700/month cap (2026). One child = 20%, two = 25%, three = 30%, four = 35%, five or more = 40%.

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