Michigan Child Support
Estimate for Michigan
Michigan uses the Income Shares model.
Official schedule: Michigan Child Support Formula (MCSF), General Care Support Table, 2021 Supplement (State Court Administrative Office, Friend of the Court Bureau, Effective Jan. 1, 2021). The schedule is a continuous marginal-rate formula, not discrete lookup rows. (2021)
View calculation breakdown
| Combined parental income | $9,000 |
|---|---|
| Total basic obligation (schedule) | $2,313 |
| Obligor income share | 55.6% |
| Obligor basic obligation | $1,285 |
| Estimated monthly support | $1,285 |
How the basic obligation splits between parents
Estimated monthly support by number of children
§ How Michigan calculates support
Michigan uses the Income Shares model but calculates on each parent's NET income as defined by the Michigan Child Support Formula (MCSF) — gross income minus taxes, FICA, mandatory retirement, union dues, and prior court-ordered support. The 2025 MCSF Manual (effective January 1, 2025) produces a presumptive monthly amount that courts must order unless they state a deviation on the record. A parental-time (overnight) offset reduces the base as overnights increase (growing above about 128 overnights), and ordinary medical costs are built in at $200/child/year (2025).
Content verified against official sources on 2026-08-09.
✦ How to open or modify a case in Michigan
- Open a case with the Friend of the Court (FOC) in the county or file with the circuit court (divorce, paternity, or support action). For unmarried parents, establish parentage first.
- Both parents provide financial documents; the FOC determines each parent's MCSF net income from all sourced income.
- The FOC runs the MiChildSupport Calculator (pcal.state.mi.us) or the manual worksheet, applying the base schedule, parental-time offset, and add-ons (health care, childcare).
- The resulting formula amount is the presumptive order. A judge may deviate only by stating on the record why the formula would be unjust or inappropriate, the deviation, and its value.
- The order is entered, usually with income withholding.
- To modify: request an FOC review (generally available about every 36 months, and recommended only if the new amount differs by at least 10% or $50/month), or file a motion showing a change in circumstances. Modifications apply from the filing date, not retroactively.
◈ Illustrative examples
Scenario: Parent A (payor) MCSF net income $4,000/month; Parent B (recipient) $3,000/month. One child. Parent A has 100 overnights per year.
Walk-through: The 2025 MCSF starts from each parent's net income (gross minus taxes, FICA, mandatory retirement, prior support). Combined net = $7,000. The base-support schedule returns a base obligation; ordinary medical is included at $200/child/year. The parental-time offset reduces the base according to overnights (modest at 100, larger above ~128). Each parent pays their income-share of the adjusted base plus childcare/health costs. (Exact base from the MCSF manual/supplement; the split is the state's Income Shares method.)
Takeaway: Michigan uses net income and adjusts for overnights; the formula amount is presumptive unless the court records a specific deviation.
Scenario: Parents have roughly equal overnights (about 182.5 each, true 50/50) and different incomes.
Walk-through: At true 50/50 parenting time, the MCSF has the higher-earning parent pay the other the difference between what each would otherwise owe, reflecting duplicated household costs.
Takeaway: More overnights reduce the transfer; at equal time the higher earner pays only the gap between the two computed obligations.
? Frequently asked questions
↗ Official policy & agency links
Sources verified: https://www.courts.michigan.gov/49cfe9/siteassets/court-administration/standardsguidelines/foc/2025mcsf.pdf · https://observed.org/child-support-guidelines-in-michigan/ · https://legalclarity.org/how-is-child-support-calculated-in-michigan-the-formula