Calculate Now →

Child Support in Wisconsin

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

📊
Child Support Calculator
Estimate payments using Wisconsin's Percentage of Income
📝
Modification Checker
Does your income change qualify?
💰
Arrears Calculator
Past-due support with 12% interest
⚖️
50/50 Custody Guide
Does equal custody eliminate support?

Wisconsin Child Support Facts — 2026

Formula modelPercentage of Income
Income basisNon-custodial parent only
Support ends at age18
Modification threshold15% income change
Arrears interest rate12% per year
Official agencyWisconsin Child Support Agency ↗
Wisconsin uses a percentage of the non-custodial parent's gross income.

Other States

AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareFloridaGeorgiaHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming