Michigan child support at a glance
- Guideline model: Income shares (the Michigan Child Support Formula)
- Income used: Each parent's net income as defined by the Michigan Child Support Formula manual; support is apportioned by each parent's share of combined net income.
- Shared parenting time: There is no threshold: a parental time offset based on overnights generally applies to every support determination (Michigan Child Support Formula §3.03).
- When support ends: At 18; a court may continue support while the child attends high school full time, but not after the child reaches 19 years and 6 months (MCL 552.605b).
Official calculator or worksheet: Michigan Child Support Formula manual (2025)
The calculation is set by the State Court Administrative Office's Michigan Child Support Formula manual.
This page explains the rules; it does not calculate an order. Health insurance, child care, other children and deviations change the result. Use the official tool and confirm with a family-law attorney licensed in Michigan.