There is no flat dollar figure for child support in Michigan. The amount depends on both parents’ incomes, how many children are involved, how many overnights each parent has, and what the family spends on health insurance and work-related childcare. Michigan runs those inputs through a mandatory statewide formula, and the state offers a free online calculator that produces a close estimate before anything is filed. As a rough benchmark, Michigan’s child support program has reported average collections of around $222 per child per month, but individual orders range from under $100 to several thousand dollars depending on what the parents earn.
What Drives the Number
Michigan courts are required to use the Michigan Child Support Formula (MCSF), a standardized calculation laid out in the Michigan Child Support Formula Manual and updated with current economic data through a companion supplement.1State Court Administrative Office. 2025 Michigan Child Support Formula Supplement The formula’s output is presumed correct, and a judge must apply it unless there’s a specific reason not to.
The calculation covers three categories: general care (food, clothing, housing, transportation), medical support (insurance premiums plus out-of-pocket costs), and work-related childcare. Both parents share the financial responsibility, but only one parent’s share gets written into a support order. The other parent is assumed to spend their share directly on the child during their own parenting time.
Income: What Counts
Income is the single biggest driver of your number. The formula casts a wide net: wages, salary, commissions, bonuses, self-employment earnings, rental income, dividends, pensions, and even non-cash benefits like employer-provided housing all count.2State Court Administrative Office. 2025 Michigan Child Support Formula Manual The formula works with net income after allowable deductions such as federal and state taxes, existing alimony paid to other people, and mandatory employment-related costs.
Once both parents’ net incomes are known, the formula calculates each parent’s percentage share of their combined income and divides the child-rearing costs proportionally. A parent earning 65% of the combined income will generally carry about 65% of the obligation.
If a Parent Isn’t Working or Is Underemployed
Quitting a job or cutting back to part-time doesn’t automatically shrink a child support obligation. If a parent is voluntarily unemployed or underemployed, the court can impute income, meaning it assigns the parent earnings they could reasonably be making.3Michigan Courts. 2025 Michigan Child Support Formula Manual – Chapter 2 Determining Income The imputed amount cannot exceed what the parent previously earned, cannot assume more than a 40-hour workweek, and cannot include hypothetical overtime or shift premiums.
Courts look at work history, reasons for leaving a prior job, education and skills, physical and mental health, job availability locally, prevailing local wages, and how diligently the parent has looked for work. Incarceration is generally not treated as voluntary unemployment. And if a parent is already working full-time (35 or more hours a week) but has stopped taking overtime or dropped a second job, imputation isn’t appropriate for those extra hours.
Overnights Change the Math
The number of overnights each parent has with the children directly affects the support amount.2State Court Administrative Office. 2025 Michigan Child Support Formula Manual A parent who has the kids more nights spends more on day-to-day costs like meals and utilities, and the formula accounts for that by adjusting the other parent’s obligation upward. Even when parenting time is close to a 50/50 split, the higher-earning parent typically still pays something to balance out the income difference.
Health Insurance and Medical Costs
Health insurance premiums for the children are built into the calculation and credited to whichever parent carries the coverage. For routine out-of-pocket costs like co-pays and over-the-counter medication, the formula presumes families spend $200 per child per year, and that amount is already included in the base support figure.1State Court Administrative Office. 2025 Michigan Child Support Formula Supplement Anything above that $200 threshold, such as braces, therapy, or uninsured surgery, is split between parents in proportion to their incomes.
Work-Related Childcare
Childcare needed so a parent can work is factored in separately and divided between parents by income share. The formula generally includes these costs until the end of the month the child turns 13. Extraordinary educational costs or a child’s special needs can also be considered.
Estimate Your Number With the State Calculator
Michigan offers a free online tool, the MiChildSupport Calculator at pcal.state.mi.us, that lets you plug in both parents’ incomes, the number of children, overnights, healthcare costs, and childcare expenses to get an estimate.4Michigan. Michigan’s Child Support Calculator It uses the current Michigan Child Support Formula, so the output closely mirrors what a court would order. The result is an estimate, not a formal recommendation or order, but it’s the best way to answer “how much will I pay?” before you ever set foot in a courtroom.
When a Judge Can Order a Different Amount
The formula’s result is presumed correct, but a court can deviate if applying the formula would be unjust or inappropriate. The judge has to put specific findings in writing: the amount the formula produced, how the actual order differs, and exactly why the formula would produce an unfair result in that case.5Michigan Legislature. Michigan Code 552.605 – Child Support Formula, Deviation
Common grounds include a child with special medical or educational needs, a parent with extraordinary personal medical expenses, large but irregular bonus income the formula doesn’t capture well, significant assets that don’t show up as regular income, or unusual levels of debt. The existence of a deviation factor doesn’t force the court to deviate. The judge still has to find the formula result unjust on the specific facts.2State Court Administrative Office. 2025 Michigan Child Support Formula Manual
Changing the Amount Later
Child support orders aren’t locked in forever. Either parent can ask the Friend of the Court (FOC) for a review once every 36 months, or sooner if circumstances have meaningfully changed.6Michigan Legislature. Michigan Code 552.517 – Review of Child Support Order After Final Judgment Qualifying changes include a significant shift in either parent’s income, changes in custody or parenting time, a change in the child’s needs, or a change in the cost or availability of health insurance.
After collecting updated information and recalculating, the FOC will file a motion with the court if a modification is warranted. There’s a threshold: the difference between the current order and the recalculated amount must be at least 10% of the current order or $50 per month, whichever is greater.7Michigan Courts. 2025 Michigan Child Support Formula Manual – Chapter 4 Other Factors Until a new order is formally entered, the existing one stays in effect.
How Long You’ll Pay
Child support in Michigan typically ends when the child turns 18. If the child is still attending high school full-time and is reasonably expected to graduate, support can continue past 18 but won’t extend beyond age 19 and six months.8State Court Administrative Office. Friend of the Court Bureau FAQ 2018-01 – Postmajority Support Obligation End Dates The order has to specify an end date on the last day of a particular month, regardless of the actual graduation date. Support can also end earlier if the child becomes emancipated through marriage or military service. And a court may order continued support past the normal cutoff for an adult child with disabilities.