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Child Support in Alaska

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

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Child Support Calculator
Estimate payments using Alaska'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?

Alaska Child Support Facts — 2026

Formula modelPercentage of Income
Income basisNon-custodial parent only
Support ends at age18
Modification threshold15% income change
Arrears interest rate6% per year
Official agencyAlaska Child Support Agency ↗
Alaska uses the Percentage of Income model based on the non-custodial parent's income only.

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