If you only remember one point about how child support is calculated in Michigan, remember this: Michigan uses the Income shares (Michigan Child Support Formula) and measures income as net income. The Michigan Child Support Formula uses each parent’s net income, a general care support table, and overnight parenting-time adjustments. Medical and childcare percentages are calculated alongside base support in Friend of the Court worksheets. Procedure, examples, and the opinions below hang off Mich. Comp. Laws § 552.605; Michigan Child Support Formula Manual. Support generally ends when Support generally continues until 18, or 19½ if still in high school full-time with expected graduation. Modification: Change of circumstances sufficient under Michigan law; Friend of the Court reviews often use a 10% threshold as a practical trigger.
Deviation from the guidelines
Deviation is allowed when the Formula result is unjust or inappropriate under factors listed in the Manual and statute.
When a court departs from the presumptive amount, Michigan practice generally requires findings that explain why the guideline figure is unjust or inappropriate and what amount better serves the child's needs. Those findings matter on appeal and in later modification proceedings.
Walking through Michigan facts
Use this walkthrough to see which Michigan authority does the work at each step.
Two parents in Michigan need a presumptive child-support figure and may have facts that justify a departure.
- Measure guideline income as net income under Mich. Comp. Laws § 552.605; Michigan Child Support Formula Manual.
- Apply the Income shares (Michigan Child Support Formula): The Michigan Child Support Formula uses each parent’s net income, a general care support table, and overnight parenting-time adjustments. Medical and childcare percentages are calculated alongside base support in Friend of the Court worksheets.
- Test deviation: Deviation is allowed when the Formula result is unjust or inappropriate under factors listed in the Manual and statute.
- If circumstances later change: Change of circumstances sufficient under Michigan law; Friend of the Court reviews often use a 10% threshold as a practical trigger.
The enforceable number is the Michigan guideline result under Mich. Comp. Laws § 552.605; Michigan Child Support Formula Manual, plus any deviation findings. Friend of the Court offices enforce through income withholding, show-cause hearings, and intercepts.
Modification of child support
Change of circumstances sufficient under Michigan law; Friend of the Court reviews often use a 10% threshold as a practical trigger.
A parent seeking a change typically must show that circumstances after the prior order make the existing award inequitable. Common triggers include job loss, substantial income changes, a new parenting-time schedule, emancipation of a child, or extraordinary medical needs. Retroactivity and temporary relief rules are statute-specific — check Mich. Comp. Laws § 552.605; Michigan Child Support Formula Manual and local family-division procedures.
Enforcement in Michigan
Friend of the Court offices enforce through income withholding, show-cause hearings, and intercepts.
Interstate cases often implicate UIFSA. Income withholding, contempt, license suspension, and tax-refund intercept remain core tools nationwide, but the Michigan child support agency and clerk of court procedures control day-to-day collection.
When child support ends
In Michigan, Support generally continues until 18, or 19½ if still in high school full-time with expected graduation. Orders may extend for disability, secondary education, or other statutory grounds where the statute allows. Always read the judgment language — agreed orders sometimes set a different end date or require a notice of emancipation.
Case law: how Michigan courts apply the guidelines
The opinions below are in the LawDiver corpus. Each block quote is taken from the opinion text so you can jump from this guide into the full decision.
PEOPLE v. HERSHEY
PEOPLE v. HERSHEY, 303 Mich. App. 330 (2013)
…CURIAM. In this criminal case involving the failure to pay child support, MCL 750.165, we consider the appeal of defendant, Joseph Frank Hershey, as on leave granted pursuant to a remand order from our Supreme Court. Defendant seeks resentencing, claiming that the trial court incorrectly scored Offense Variables (OVs) 16 and 19. In its order, the Supreme Court directed this Co…
Michigan opinions such as PEOPLE v. HERSHEY are cited where child support is disputed. The court stated: "CURIAM. In this criminal case involving the failure to pay child support, MCL 750.165, we consider the appeal of defendant, Joseph Frank Hershey, as on leave granted pursuant to a remand order from our Supreme Court." That is the language to brief; the rest of the decision supplies the procedural posture.
Holmes v. Holmes
Holmes v. Holmes, 281 Mich. App. 575 (2008)
Gleicher, J. In this dispute regarding child support, plaintiff appeals by delayed leave granted a circuit court order granting defendant’s motion to modify his child support obligation. We reverse and remand. I. FACTS AND PROCEEDINGS The parties married in 1988 and consented to the entry of a divorce judgment on July 15, 1996. The *577 parties, who are bot…
On child support, Holmes v. Holmes speaks to the Michigan dispute in this passage: "Gleicher, J. In this dispute regarding child support, plaintiff appeals by delayed leave granted a circuit court order granting defendant’s motion to modify his child support obligation. We reverse and remand. I." The surrounding opinion shows how the court applied that language to the record.
Peterson v. Peterson
Peterson v. Peterson, 272 Mich. App. 511 (2007)
…nd of the Court (FOC) recommendation concerning defendant’s child support obligation. The issue presented to us is whether the trial court, in the context of calculating defendant’s child support obligation, erred in deducting taxes from defendant’s income. These taxes were not actually incurred by defendant, but theoretically would have been incurred had defendant not been ent…
Practitioners open Peterson v. Peterson when Michigan child support turns on the distinction in this sentence: "Court (FOC) recommendation concerning defendant’s child support obligation. The issue presented to us is whether the trial court, in the context of calculating defendant’s child support obligation, erred in deducting taxes from defendant’s income." Do not lift it out of the facts the court was deciding.
Susana E Narvaez Teran v. Michael R Rittley
Susana E Narvaez Teran v. Michael R Rittley, 313 Mich. App. 197 (2015)
…trial court’s September 24, 2013 order setting defendant’s child support obligation at $1,211 a month. Defendant also appeals by right the trial court’s May 14, 2014 order awarding attorney fees to plaintiff. We conclude that the trial court possessed subject-matter jurisdiction, and that it did not abuse its discretion by establishing the amount of child support, by making it…
Susana E Narvaez Teran v. Michael R Rittley is worth reading on Michigan child support because the court put the point in its own words: "September 24, 2013 order setting defendant’s child support obligation at $1,211 a month. Defendant also appeals by right the trial court’s May 14, 2014 order awarding attorney fees to plaintiff." Use that passage as the starting point, then read the facts that precede it.
Burba v. Burba (After Remand) — Weaver, J., concurring
Burba v. Burba (After Remand) — Weaver, J., concurring, 461 Mich. 637 (2000)
…not an appropriate reason for departing from the applicable child support formula. Rather, I would reverse solely on the basis of the friend of the court’s error, which went uncorrected by the trial judge. In preparing its recommendation, the friend of the court proceeded as if this case involved sole custody, rather than shared custody.1 The friend of the court mistakenly made…
Practitioners open Burba v. Burba (After Remand) — Weaver, J., concurring when Michigan child support turns on the distinction in this sentence: "Rather, I would reverse solely on the basis of the friend of the court’s error, which went uncorrected by the trial judge. In preparing its recommendation, the friend of the court proceeded as if this case involved sole custody, rather than shared custody." Do not lift it out of the facts the court was deciding.
Ghidotti v. Barber
Ghidotti v. Barber, 459 Mich. 189 (1998)
…thereby have an income imputed to her as the basis for her child support obligation to a noncustodial third child. The statutorily authorized Michigan Child Support Formula Manual prohibits the imputation of means-tested public assistance benefits as income. While a trial court may enter an order of support that deviates from the formula, it may not do so without setting forth…
On child support, Ghidotti v. Barber speaks to the Michigan dispute in this passage: "The statutorily authorized Michigan Child Support Formula Manual prohibits the imputation of means-tested public assistance benefits as income." The surrounding opinion shows how the court applied that language to the record.
Practical checklist for Michigan child support matters
- Gather recent pay stubs, tax returns, and proof of health insurance / child-care costs.
- Complete the current Michigan worksheet or financial affidavit required by the local court.
- Document parenting-time overnights if a shared-custody adjustment may apply.
- Flag facts that could support deviation (special needs, travel costs, high income, other children).
- Search LawDiver for recent Michigan appellate decisions before mediation or trial.
Key takeaways
- Michigan follows the Income shares (Michigan Child Support Formula) model for presumptive child support.
- Income is generally measured using net income, then allocated under Mich. Comp. Laws § 552.605; Michigan Child Support Formula Manual.
- Guideline amounts are presumptive, not automatic — courts may deviate when the facts justify it.
- Support generally continues until 18, or 19½ if still in high school full-time with expected graduation.
- Either parent can seek modification when change of circumstances sufficient under michigan law; friend of the court reviews often use a 10% threshold as a practical trigger..
- Read the companion guide: Michigan alimony / spousal support.
Statutory framework and guideline model
Michigan's child support system is built around Mich. Comp. Laws § 552.605; Michigan Child Support Formula Manual. Under the income shares (michigan child support formula), The Michigan Child Support Formula uses each parent’s net income, a general care support table, and overnight parenting-time adjustments. Medical and childcare percentages are calculated alongside base support in Friend of the Court worksheets.
Federal law requires every state to maintain presumptive guidelines and to review them at least every four years (42 U.S.C. § 667). Confirm the latest Michigan schedule or worksheet before relying on any online calculator.
How child support is calculated in Michigan
- Identify each parent's guideline income using net income as defined in Mich. Comp. Laws § 552.605; Michigan Child Support Formula Manual and the accompanying worksheets or administrative rules.
- Apply the income shares (michigan child support formula) — whether that means a combined-income schedule, an obligor percentage table, or a Melson-style self-support reserve plus primary obligation.
- Allocate add-ons such as health insurance premiums, unreimbursed medical expenses, and work-related child care according to Michigan practice.
- Consider parenting time adjustments where the guidelines or case law authorize a credit or shared-custody formula.
- Test for deviation if a strict guideline result would be unjust or inappropriate on the record.
Online calculators can illustrate ranges, but only the controlling statute, guidelines, and court findings produce an enforceable order.
Frequently asked questions
How is child support calculated in Michigan?
Michigan uses the income shares (michigan child support formula) under Mich. Comp. Laws § 552.605; Michigan Child Support Formula Manual. Courts start with net income, apply the guideline schedule or percentage, allocate add-ons, and may deviate with findings when the presumptive amount is unjust.
What income counts for Michigan child support?
Guideline income generally tracks net income as defined by Mich. Comp. Laws § 552.605; Michigan Child Support Formula Manual and the worksheets. Wages, self-employment income, bonuses, and certain benefits are commonly included; exact deductions and exclusions are statute-specific.
Can Michigan courts order more or less than the guideline amount?
Yes. Guideline support is presumptive. Judges may deviate when the record shows the guideline result is unjust or inappropriate, typically with written findings explaining the departure.
How do I modify a Michigan child support order?
Change of circumstances sufficient under Michigan law; Friend of the Court reviews often use a 10% threshold as a practical trigger. File in the court with continuing jurisdiction (or follow UIFSA for interstate cases) and support the request with current financial evidence.
When does child support end in Michigan?
Support generally continues until 18, or 19½ if still in high school full-time with expected graduation. Confirm any disability, educational, or agreed extensions in your particular order.
Where can I research Michigan child support case law?
Use LawDiver search scoped to Michigan, or open the opinions linked in this guide. Companion reading: Michigan spousal support guide.
Disclaimer
This guide is general legal information about Michigan child support, not legal advice. Statutes, guidelines, and case law change. Confirm the current text of Mich. Comp. Laws § 552.605; Michigan Child Support Formula Manual and consult a licensed Michigan family-law attorney about your facts.