How Child Support is Calculated in Michigan
Michigan uses an Income Shares model called the Michigan Child Support Formula (MCSF), administered by the State Court Administrative Office. The formula uses both parents' net incomes, applies a base support obligation, and then adjusts for the number of overnights each parent has.
Estimated Monthly Child Support in Michigan
Below are sample calculations using our Michigan formula. These figures assume the higher-earning parent pays support and exclude childcare or insurance add-ons.
| Your Income | Other Parent | 1 Child | 2 Children | 3 Children |
|---|---|---|---|---|
| $3,000/mo | $3,000/mo | ~$720 | ~$1,260 | ~$1,692 |
| $4,000/mo | $2,500/mo | ~$880 | ~$1,540 | ~$2,068 |
| $6,000/mo | $3,000/mo | ~$1,200 | ~$2,100 | ~$2,820 |
What Can Increase or Decrease Payments in Michigan?
- Each parent's gross monthly income from all sources
- The number of children covered by the order
- Health insurance premiums paid for the children
- Work-related childcare and daycare expenses
- How much overnight parenting time each parent has
- Any extraordinary medical, educational, or special-needs costs
How to File for Child Support in Michigan
- Open a case with Michigan's Department of Child Support Services (or the equivalent state agency).
- Provide proof of both parents' income — pay stubs, tax returns, or a financial affidavit.
- Submit a parenting plan or custody order showing each parent's overnight time.
- Attend a hearing or administrative review where a judge or referee finalizes the order.
Frequently Asked Questions — Michigan Child Support
How does Michigan handle parenting-time offsets?
Michigan uses a continuous formula: every overnight the obligor has reduces the support obligation. There is no fixed shared-custody threshold — the offset scales smoothly.
Does Michigan count overtime?
Yes, but courts may exclude unusual or non-recurring overtime if it would unfairly inflate the obligation.
Can Michigan parents agree to a non-guideline amount?
Yes, but the court must approve any deviation and find that the guideline amount would be unjust or inappropriate.
When does Michigan child support end?
Support ends at age 18, or up to 19 ½ if the child is still in high school living full-time with the recipient parent.