Michigan Child Support Calculator
Estimate Michigan child support for 2026 using the Income Shares guideline model under Michigan Child Support Formula Manual (MCL § 552.519). Enter both parents' incomes and the parenting-time split to see what you may owe or receive.
Michigan follows the Income Shares model under the Michigan Child Support Formula Manual. The court combines both parents' monthly gross incomes, looks up the basic support obligation on the state's guideline schedule for that income level and number of children, then prorates the obligation between the parents according to each parent's percentage share of the combined income.
Michigan uses a shared-care formula, so the number of overnights each parent has directly changes the support amount. The Michigan Child Support Formula Manual applies a parenting-time offset using a published exponent table, which lowers the higher earner's payment as their overnight count climbs. The more nights the paying parent keeps the child, the smaller the support transfer tends to be. The on-page calculator estimates this offset, but the official worksheet and your final court order control.
The cost of the child's health insurance premium is treated as an adjustment under the Michigan Child Support Formula Manual. The premium attributable to the children is factored into the calculation and effectively shared between both parents in proportion to their income shares. The parent who carries the coverage generally gets credit for paying it. Because plan costs vary, the calculator's figure is an estimate, and the official worksheet sets the controlling amount.
Work-related child care and daycare costs are an allowable add-on in Michigan. Under the Michigan Child Support Formula Manual, qualifying care expenses are included in the calculation and divided between the parents based on each parent's percentage share of combined income. So a parent earning a larger share of the combined income generally covers a larger share of the daycare. The estimate on this page approximates that split, but the official worksheet controls the final numbers.
Michigan judges start from the guideline figure produced by the Michigan Child Support Formula Manual, and that number is presumed correct. A court may deviate when applying the formula would be unjust or inappropriate, but the judge must put specific findings on the record explaining why. The parent asking for a different amount carries the burden of showing a deviation is justified. This calculator gives an estimate only and is not legal advice, so confirm any departure with the official worksheet or a licensed Michigan attorney.
Frequently asked questions
How is child support calculated in Michigan?
Michigan follows the Income Shares model under the Michigan Child Support Formula Manual (MCL section 552.519). The court combines both parents' monthly incomes, looks up the basic support obligation on the state's guideline schedule for that income level and number of children, then prorates that obligation by each parent's percentage share of the combined income. It then applies adjustments for parenting time, child care, health insurance, and other dependents. The figure rests on net income after allowable deductions. The calculator on this page produces an estimate only. The official worksheet and your court order set the binding amount.
Is there an official Michigan child support worksheet I should rely on?
Yes. The controlling form is the worksheet built into the Michigan Child Support Formula Manual, published by the State Court Administrative Office. The state also runs the MiCase online support calculator at micase.state.mi.us for parents to estimate their obligation. Any number you generate on this page is an unofficial estimate meant to orient you before you fill out the real worksheet. The Friend of the Court and the judge rely on the official formula worksheet, not on outside calculators, so always verify your result against it or with a licensed Michigan attorney.
What income does Michigan count when setting child support?
Michigan starts from net income drawn from nearly all sources, including wages, salaries, commissions, bonuses, self-employment net earnings, retirement, Social Security, unemployment, workers' compensation, and disability. From that, the formula subtracts allowable deductions such as federal, state, and local taxes, FICA, mandatory union dues, life insurance, and any existing court-ordered support. Bonuses and overtime are generally part of income, though the court can look at how regular they are. Because self-employment earnings can be complex, the official worksheet under the Michigan Child Support Formula Manual, not this estimate, controls the final figure.
How do 50/50 or shared parenting arrangements change support in Michigan?
Michigan uses a shared-care formula, so overnights matter a great deal. The Michigan Child Support Formula Manual applies a parenting-time offset using a published exponent table that reduces the higher earner's obligation as that parent's share of overnights rises. In a true 50/50 split, the support transfer is often smaller because each parent already covers many direct costs, but it rarely reaches zero unless incomes are close. The exact result depends on both incomes and the overnight count. This page estimates that offset, while the official worksheet sets the final amount.
Can income be imputed to an unemployed or underemployed parent in Michigan?
Yes. Under the Michigan Child Support Formula Manual, a court can attribute potential income to a parent who is voluntarily unemployed or underemployed. The court looks at factors like work history, education, skills, and local job opportunities to decide what that parent could reasonably earn. This stops a parent from dodging support by quitting or taking far less work than they are capable of. The Friend of the Court can recommend an imputed figure. Because imputation is fact-specific, treat this calculator as an estimate and confirm any imputed income with the official worksheet or an attorney.
When does child support end in Michigan?
Michigan child support generally ends when the child turns 18. It can extend up to age 19 and a half if the child is still attending high school full time and living with the recipient parent. Support does not automatically continue past those points just because a child goes to college. If a child has special needs, the court may address ongoing support separately. Because timing affects what you owe, confirm the end date in your specific order. This page provides an estimate only and is not a substitute for the official worksheet or legal advice.
How do I change a Michigan child support order, and what are the arrears?
To modify support, you file a motion in circuit court or request a review through the Friend of the Court. A change in monthly support of at least $50 or 10 percent, whichever is greater, supports modification. Until a judge signs a new order, the old amount stays in force, so any unpaid balance keeps building as arrears. The Michigan Office of Child Support, part of the Department of Health and Human Services, enforces arrears through income withholding, tax intercept, license suspension, liens, credit reporting, and contempt. This calculator estimates current support only, not back-owed amounts.