Child Support in Delaware

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

Child Support Calculator

Estimate payments using Delaware's Melson Formula

Modification Checker

Does your income change qualify?

Arrears Calculator

Past-due support with 5% interest

50/50 Custody Guide

Does equal custody eliminate support?

Delaware Child Support Facts — 2026

Formula modelMelson Formula

Income basisBoth parents' income

Support ends at age18

Modification threshold10% income change

Arrears interest rate5% per year

Official agencyDelaware Child Support Agency ↗

Delaware uses the Melson Formula — one of only 3 states. This formula first reserves income for each parent's self-support needs.

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