Calculate Now →

Child Support in Oregon

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

📊
Child Support Calculator
Estimate payments using Oregon's Income Shares
📝
Modification Checker
Does your income change qualify?
💰
Arrears Calculator
Past-due support with 9% interest
⚖️
50/50 Custody Guide
Does equal custody eliminate support?

Oregon Child Support Facts — 2026

Formula modelIncome Shares
Income basisBoth parents' income
Support ends at age18
Modification threshold15% income change
Arrears interest rate9% per year
Official agencyOregon Child Support Agency ↗
Oregon uses Income Shares. Support ends at 18 or high school graduation.

Other States

AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareFloridaGeorgiaHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming