Michigan parents can modify child support orders when circumstances change significantly, with modifications requiring either a 10% difference in the calculated support amount or at least $50 per month change from the current order, whichever is greater. Under MCL 552.517, parents have the right to request a Friend of the Court (FOC) review every 36 months, or they can file a Motion Regarding Support (Form FOC 50) at any time when a substantial change in circumstances occurs. The filing fee for a child support modification motion is approximately $60 as of May 2026, though fee waivers are available for households earning below 125% of the federal poverty level (approximately $19,506 for a single person or $40,000 for a family of four).
Key Facts: Michigan Child Support Modification
| Requirement | Details |
|---|---|
| Modification Threshold | 10% of current support OR $50/month, whichever is greater |
| Filing Fee | Approximately $60 (varies by county) |
| FOC Review Right | Every 36 months |
| Primary Form | FOC 50 (Motion Regarding Support) |
| Governing Statute | MCL 552.517, MCL 552.517b |
| Support Formula | Michigan Child Support Formula (MCSF) |
| Income Model | Income Shares Model |
| Low-Income Minimum | $25 per child per month |
What Qualifies as a Substantial Change in Circumstances in Michigan
Michigan courts require a substantial change in circumstances before modifying child support, defined as a change so significant that continuing the current support amount would be unfair to either party or the child. Under the Michigan Child Support Formula Supplement 3.01(B), qualifying changes include job loss or significant income changes of at least 10%, disability or serious health conditions affecting earning capacity, changes in parenting time exceeding 52 overnights annually, new medical expenses for a child or parent, and changes in the number of children requiring support.
Specific circumstances that Michigan courts recognize as substantial include the payer beginning or stopping Social Security benefits, a child starting to receive Social Security benefits based on the payer's earnings, a parent being called to active military duty for at least 6 months resulting in significant income loss, and changes in the physical, mental, or educational needs of a child. These changes must generally be ongoing for at least six months before the court will consider them substantial enough to warrant modification.
Temporary or voluntary income changes typically do not qualify for child support modification in Michigan. If a parent quits a job without good reason or deliberately reduces income to lower support obligations, Michigan courts may impute income based on earning capacity rather than actual earnings. The court examines whether the income change was made in good faith or was an attempt to manipulate the support obligation.
The 10% or $50 Modification Threshold Explained
Michigan law establishes a minimum threshold that must be met before the Friend of the Court will petition for a support modification. Under the Michigan Child Support Formula, the difference between the current support amount and the recalculated amount must be at least 10% of the current order OR $50 per month, whichever is greater. For example, if your current support order is $600 per month, a 10% change would be $60, which exceeds $50, so the threshold would be $60. If your current order is $400 per month, a 10% change would be $40, which is less than $50, so the threshold would be $50.
This threshold applies specifically to FOC-initiated modifications. Parents who file their own Motion Regarding Support with the court are not technically bound by this threshold, but judges typically apply similar reasoning when determining whether a modification is warranted. The threshold exists to prevent frequent modifications based on minor fluctuations in income while ensuring that significant changes receive appropriate attention.
Two Pathways to Child Support Modification in Michigan
Michigan provides parents with two distinct pathways to modify child support: the Friend of the Court administrative review process and filing a motion directly with the circuit court. Each pathway has advantages depending on your specific circumstances, timeline needs, and comfort level with legal procedures.
Pathway 1: Friend of the Court Review Process
The FOC review process is the most common method for child support modification in Michigan. Under MCL 552.517b, either parent has the right to request an FOC review every 36 months regardless of whether circumstances have changed. Additionally, parents can request a review at any time if a substantial change in circumstances has occurred.
To initiate an FOC review, submit a written request to your local Friend of the Court office explaining why you believe modification is necessary. The FOC will gather financial information from both parents, apply the Michigan Child Support Formula, and compare the calculated amount to the current order. If the difference meets the 10% or $50 threshold, the FOC will schedule a joint meeting with both parents to attempt resolution. This FOC review process typically does not require a filing fee.
If the parents cannot reach agreement at the joint meeting, the FOC will prepare a recommendation and submit it to the court. Either parent has 21 days to object to the FOC recommendation. If no objection is filed, the recommendation becomes a court order. If an objection is filed, a hearing will be scheduled before a judge or referee.
Pathway 2: Filing a Motion Regarding Support
Filing a Motion Regarding Support (Form FOC 50) directly with the circuit court is typically faster than the FOC review process but involves a filing fee of approximately $60. This pathway is appropriate when circumstances have changed significantly and you need a more expedited resolution, when less than 36 months have passed since your last FOC review, or when you anticipate the other parent will contest any proposed modification.
To file a motion, obtain Form FOC 50 from the Michigan Courts website, your local FOC office, or through the Michigan Legal Help website's Do-It-Yourself tool. Complete the form explaining your circumstances, pay the filing fee (or request a fee waiver if eligible), and file the original plus five copies with the circuit court clerk. You must serve the other parent with the motion at least 9 days before the scheduled hearing date using Form MC 302 (Proof of Mailing) or personal service.
Step-by-Step Guide to Filing Form FOC 50
Filing a Motion Regarding Support requires careful attention to procedure. Michigan courts have specific requirements for form completion, service of process, and hearing preparation that must be followed precisely.
Step 1 involves gathering documentation to support your modification request. This includes your most recent tax returns (past 2-3 years), current pay stubs (past 3-6 months), proof of any income changes (termination letters, new employment offers, Social Security award letters), documentation of changed expenses (medical bills, childcare costs), and proof of any parenting time changes.
Step 2 requires completing Form FOC 50 accurately. Items A through K on the form must be completed before filing. Include the full case number, names of all parties, the current support amount, the amount you are requesting, and a detailed explanation of the changed circumstances supporting your request.
Step 3 involves paying the filing fee or requesting a fee waiver. The filing fee is approximately $60 but varies by county. If your household income falls below 125% of the federal poverty level, you can request a fee waiver using the Fee Waiver Request form. For 2026, this threshold is approximately $19,506 for a single-person household or $40,000 for a family of four.
Step 4 requires obtaining a hearing date from the FOC office or court clerk. Once scheduled, fill in the judge or referee name, hearing date, time, and location on your motion form.
Step 5 involves serving the other parent with notice of the motion and hearing at least 9 days before the hearing date. Keep proof of service for your records and file a copy with the court.
How Michigan Calculates Child Support
Michigan uses the Income Shares Model to calculate child support, combining both parents' net incomes and allocating support responsibility based on each parent's proportional share of the combined income. The Michigan Child Support Formula (MCSF) Manual, updated effective January 1, 2025, provides the specific calculation methodology that courts and the FOC must apply.
The calculation process starts with determining each parent's gross income from all sources, including wages, salaries, commissions, bonuses, Social Security benefits, unemployment compensation, workers' compensation, pension and retirement income, rental income, and self-employment income. From gross income, specific deductions are subtracted to arrive at net income, including federal and state income taxes, FICA taxes, mandatory retirement contributions, union dues, and existing support obligations for other children.
Once net income is calculated for each parent, the formula combines these amounts and references the base support schedule to find the presumptive support obligation based on combined income and number of children. Each parent's share of this obligation is then determined by their percentage of the combined income. Additional expenses for healthcare coverage, unreimbursed medical expenses, and childcare costs are prorated between parents based on income shares.
Parenting time significantly affects the support calculation under MCSF 3.03. The overnight-based offset formula reduces support obligations when the noncustodial parent has substantial parenting time. Below 52 overnights annually, no offset applies. Between 52 and 127 overnights, a minor offset applies. Between 128 and 183 overnights, the offset increases substantially. Near-equal parenting time (182-183 overnights each) can result in minimal or no support obligation when incomes are similar.
Low-Income Provisions and Minimum Support Orders
Michigan recognizes that applying the standard formula to very low-income parents can create undue hardship. Under MCSF 2.07, when a parent's income falls below the federal poverty guideline for one person, the formula applies a Low-Income Transition to cushion the support order rather than applying the full guideline calculation.
The presumptive minimum support order in Michigan is $25 per child per month for parents below the low-income threshold. For 2026, this threshold is tied to the federal poverty guideline, which is approximately $15,060 annually for a single person. Parents earning below this amount will typically receive orders at or near the minimum rather than the full formula calculation.
If you are the payer and your income has dropped significantly, you may qualify for the low-income transition even if you did not previously. Similarly, if you are the recipient and the payer's income has increased above the low-income threshold, you may be entitled to increased support based on the standard formula calculation.
Retroactive Modification: What Michigan Law Allows
Michigan law strictly limits retroactive child support modifications. Under MCL 552.603(2), support is only modifiable from the date that notice of a petition for modification is given to the other parent. Courts cannot go back and modify support for periods before the modification request was properly filed and served.
This limitation makes timing critically important. If you experience a job loss on January 1 but do not file for modification until April 1, any modification can only apply from April 1 forward. You remain responsible for the original support amount from January through March. Parents who anticipate or experience significant income changes should file for modification promptly rather than waiting to see if circumstances improve.
The non-retroactivity rule works both ways. If you are the recipient and learn that the payer received a substantial raise six months ago, your modification can only increase support from the date you file forward. The payer does not owe additional support for the six months before you filed, even though their income was higher during that period.
Child Support Enforcement and Arrearages in Michigan
While seeking a modification, existing support obligations continue in full force. Michigan aggressively enforces child support through multiple mechanisms under the Support and Parenting Time Enforcement Act, MCL 552.601 et seq.
Income withholding is the primary enforcement mechanism, with child support automatically deducted from the payer's wages. Up to 50% of disposable earnings may be garnished for support if the payer is also supporting another spouse or child, or up to 60% if not. An additional 5% may be garnished if the payer is more than 12 weeks behind on payments. Child support withholding takes priority over all other garnishments under Michigan law.
Additional enforcement actions for non-payment include federal and state tax refund interception, suspension of driver's, professional, and recreational licenses, property liens on real estate, vehicles, and other assets, credit bureau reporting that damages credit scores, U.S. passport denial for arrearages exceeding $2,500, and criminal prosecution for felony non-support as a last resort.
Surcharges on arrearages may be ordered by the court, with interest added every January 1st and July 1st at a rate tied to five-year U.S. Treasury Notes plus 1%. These surcharges become part of the total amount owed and can significantly increase arrearages over time.
How Long Does a Child Support Modification Take
The timeline for child support modification in Michigan varies depending on the pathway chosen and whether the modification is contested. Understanding these timelines helps parents plan appropriately and set realistic expectations.
The FOC review process typically takes 60 to 120 days from initial request to final order. This includes time for the FOC to gather financial information from both parents (21-30 days), apply the formula and prepare a recommendation (14-21 days), schedule and conduct a joint meeting (21-30 days), and process the recommendation through court approval or handle objections.
Filing a Motion Regarding Support can be faster, often resolving within 30 to 60 days if uncontested. The timeline includes filing and service (7-14 days), waiting period before hearing (minimum 9 days after service), the hearing itself, and the judge entering a modified order. Contested modifications requiring multiple hearings or involving complex financial issues may take 90 to 180 days or longer.
Factors that extend timelines include difficulty obtaining financial documentation from the other parent, disputes over income calculations or imputed income, disagreements about parenting time affecting the support calculation, and appeals of FOC recommendations or court decisions.
When to Hire an Attorney for Child Support Modification
Many child support modifications in Michigan can be handled without an attorney, particularly straightforward FOC reviews where both parents agree that circumstances have changed. However, certain situations benefit significantly from legal representation.
Consider hiring an attorney if the other parent disputes your claimed change in circumstances, you believe the other parent is hiding income or underreporting earnings, your case involves complex financial issues like business ownership or investment income, you need to impute income to an unemployed or underemployed parent, the modification involves simultaneous changes to custody or parenting time, there are significant arrearages that need to be addressed, or you are facing contempt charges for non-payment.
Attorney fees for child support modifications in Michigan typically range from $1,500 to $5,000 for straightforward modifications to $5,000 to $15,000 or more for contested cases requiring multiple hearings. Many family law attorneys offer payment plans, and some provide limited-scope representation where they assist with specific tasks rather than handling the entire case.
Fee Waivers for Low-Income Parents
Michigan courts must waive filing fees for parents who cannot afford them. The fee waiver process is straightforward for those who qualify.
Automatic approval applies if you receive public assistance based on low income (FAP, SNAP, Healthy Michigan, CHIP, ESO, FIP, TANF, WIC, or SSI), are represented by a legal services program receiving Legal Services Corporation or Michigan State Bar Foundation funding, or are represented by a law school clinic based on low income.
For parents not in these categories, a judge will review your Fee Waiver Request. Fees must be waived if your gross household income falls below 125% of the federal poverty level. For 2026, this threshold is approximately $19,506 for a single-person household, $26,496 for a two-person household, $33,486 for a three-person household, and $40,476 for a four-person household.
To request a fee waiver, complete the Fee Waiver Request form available from the court clerk and submit it with your motion. Include documentation of your income and any public benefits you receive. The clerk will either approve immediately (if you meet automatic approval criteria) or forward to a judge for review.
Frequently Asked Questions About Michigan Child Support Modification
How often can I request a child support modification in Michigan?
You can request an FOC review every 36 months as a matter of right under MCL 552.517b, regardless of whether circumstances have changed. If a substantial change in circumstances occurs, you can request modification at any time by filing a Motion Regarding Support with the court. The 36-month waiting period only applies to FOC administrative reviews, not court motions.
What is the filing fee for a child support modification motion in Michigan?
The filing fee for a Motion Regarding Support in Michigan is approximately $60 as of May 2026, though exact amounts vary slightly by county. Fee waivers are available for households earning below 125% of the federal poverty level (approximately $19,506 for a single person or $40,000 for a family of four). Contact your local circuit court clerk for the exact fee in your county.
Can I modify child support if I lost my job?
Yes, job loss is one of the most common grounds for child support modification in Michigan. However, the income change must generally be ongoing for at least six months before courts consider it substantial. Temporary unemployment or voluntary job loss without good reason may not qualify. If you lost your job involuntarily, file for modification promptly since changes can only apply from the filing date forward.
How much does child support have to change to qualify for modification?
Michigan requires the recalculated support amount to differ from the current order by at least 10% OR $50 per month, whichever is greater, for the FOC to petition for modification. For a $500 monthly order, the threshold would be $50 (10%). For a $400 monthly order, the threshold would be $50 (since 10% would only be $40). This threshold ensures modifications address meaningful changes rather than minor fluctuations.
Can child support be modified retroactively in Michigan?
No, Michigan law under MCL 552.603(2) prohibits retroactive child support modification. Support can only be modified from the date the modification petition is served on the other parent. If your circumstances changed six months ago but you file today, the modification applies only from today forward. This makes filing promptly when circumstances change critically important.
What happens if I cannot afford to pay my current child support while waiting for modification?
Your existing support obligation remains in full force until a judge enters a modified order. Non-payment during the modification process will result in arrearages, potential enforcement actions, and possibly contempt of court charges. Contact your local FOC office to discuss your situation. In extreme hardship cases, you may request an emergency modification hearing, though these are granted only in exceptional circumstances.
How does parenting time affect child support calculations in Michigan?
Parenting time directly affects support calculations under the Michigan Child Support Formula. No offset applies below 52 overnights annually. Between 52 and 127 overnights, a minor reduction applies. Between 128 and 183 overnights, the reduction increases substantially. Near-equal parenting time (182-183 overnights each) can result in minimal or no support when incomes are similar. A significant change in parenting time can therefore justify a support modification.
Do I need an attorney to modify child support in Michigan?
Many straightforward modifications can be handled without an attorney using the FOC review process or the Michigan Legal Help Do-It-Yourself tools. However, consider hiring an attorney if the other parent disputes the modification, income issues are complex, you believe the other parent is hiding income, or significant arrearages are involved. Attorney fees typically range from $1,500 to $5,000 for uncontested modifications.
What income is considered when calculating child support in Michigan?
Michigan considers income from all sources when calculating child support, including wages, salaries, commissions, bonuses, overtime, Social Security benefits, unemployment and workers' compensation, pension and retirement income, rental and investment income, self-employment income, and imputed income for voluntarily unemployed or underemployed parents. Only specific deductions like taxes, FICA, and existing support orders are subtracted to determine net income.
How long does a child support modification take in Michigan?
FOC reviews typically take 60 to 120 days from request to final order. Court motions can resolve in 30 to 60 days if uncontested, or 90 to 180 days or longer if contested. Factors extending timelines include difficulty obtaining documentation, disputes over income calculations, disagreements about parenting time, and appeals. Filing promptly when circumstances change maximizes the benefit of any modification.
Additional Resources
Michigan provides extensive resources for parents navigating child support modification. The Michigan Department of Health and Human Services offers the official MiChildSupport Calculator for estimating support amounts. Michigan Legal Help provides free Do-It-Yourself tools for preparing court forms. Your local Friend of the Court office can explain county-specific procedures and provide assistance with the administrative review process. For complex situations or contested modifications, consulting with a Michigan family law attorney ensures your rights are protected and the process is handled correctly.