Wage garnishment for divorce in Illinois is automatic for nearly every support order. Under the Income Withholding for Support Act (750 ILCS 28/20), every child support order entered after July 1, 1997 must include an Income Withholding Order (IWO) sent directly to the obligor's employer. Illinois law caps deductions at 50% to 65% of disposable income, depending on family status and arrears.
Key Facts: Wage Garnishment for Support in Illinois
| Fact | Detail |
|---|---|
| Filing Fee | $250–$388 (Cook County: $388; DuPage: $343) |
| Waiting Period | 90 consecutive days residency before judgment entered |
| Residency Requirement | One spouse resident 90 days (750 ILCS 5/401) |
| Grounds | Irreconcilable differences (no-fault only) |
| Property Division Type | Equitable distribution |
| Maximum Garnishment | 50%–65% of disposable income (CCPA tiers) |
| Governing Statute | Income Withholding for Support Act (750 ILCS 28) |
| Employer Penalty | $100/day for non-compliance (no statutory cap per day) |
How Wage Garnishment Works in an Illinois Divorce
Wage garnishment for support in Illinois operates through an automatic Income Withholding Order issued with nearly every support judgment. Under 750 ILCS 5/505, every child support order includes an IWO that directs the employer to deduct payments and remit them to the Illinois State Disbursement Unit (SDU). The employer must begin withholding within 14 days of receiving the notice.
Illinois adopted the federal income shares model for calculating child support, and the resulting dollar amount becomes the figure withheld from each paycheck. The Income Withholding for Support Act (750 ILCS 28) makes withholding the default collection method, not a last resort. Unlike garnishment for ordinary consumer debt, support garnishment requires no separate lawsuit, no court hearing, and no proof of missed payments. The order issues at the same time the divorce judgment or parentage order is entered. This system, known as automatic wage deduction for child support, ensures consistent collection without forcing the receiving parent to chase payments. The obligor's employer becomes a legally bound participant in the collection process the moment the notice arrives.
Income Withholding Order Requirements Under 750 ILCS 28/20
An income withholding order in Illinois must meet five statutory requirements to be enforceable. Under 750 ILCS 28/20, the IWO must use the standard federal format prescribed by the U.S. Department of Health and Human Services, state the date of the underlying support order, direct withholding of the current support amount, direct withholding of any arrears, and direct enrollment of children in available health insurance.
The order must also direct the payor to remit withheld amounts to the State Disbursement Unit. When an arrearage exists, the IWO must require delinquency payments at a rate of no less than 20% of the current support obligation. For example, if monthly child support is $1,000, the order must collect at least $200 per month toward past-due amounts in addition to the current $1,000. The notice must explicitly state that the amount withheld cannot exceed the maximum permitted under the federal Consumer Credit Protection Act. The IWO can be prepared and served by the obligee (the receiving parent) or by a public child support office. This income withholding order framework ensures the employer receives precise, standardized instructions and cannot claim confusion as a defense for failing to deduct support.
Illinois Wage Garnishment Limits: The CCPA Tiers
Illinois caps support garnishment between 50% and 65% of disposable income, following the federal Consumer Credit Protection Act (15 U.S.C. § 1673) precisely. The exact percentage depends on whether the obligor supports another family and how far behind they are on payments. These limits apply to disposable earnings — gross pay minus mandatory deductions for taxes and Social Security — not gross wages.
The four-tier structure determines the maximum garnishment Illinois employers may withhold for a garnished wages alimony or child support obligation:
| Obligor Situation | Maximum % of Disposable Income |
|---|---|
| Supports another spouse/child, less than 12 weeks in arrears | 50% |
| Supports another spouse/child, more than 12 weeks in arrears | 55% |
| No other dependents, less than 12 weeks in arrears | 60% |
| No other dependents, more than 12 weeks in arrears | 65% |
Disposable income includes wages, salaries, commissions, bonuses, and pension or retirement income, calculated after mandatory tax and Social Security deductions. Voluntary payroll deductions such as medical insurance premiums, 401(k) contributions, or union dues do not reduce disposable income for garnishment purposes. The additional 5% surcharge applies once arrears exceed 12 weeks, pushing a single obligor with no other dependents to the maximum 65% ceiling. These support enforcement wage limits are far higher than the 15% cap that applies to ordinary creditor garnishments in Illinois, reflecting the state's priority on collecting family support.
Garnishment for Maintenance (Spousal Support) in Illinois
Maintenance garnishment in Illinois follows the same CCPA percentage limits as child support but cannot be routed through the State Disbursement Unit when no child support exists. Under 750 ILCS 5/504, Illinois calls spousal support "maintenance," and income withholding for maintenance is permitted — but 750 ILCS 5/507.1 excludes maintenance-only orders from SDU processing.
This creates a critical practical distinction. When an order includes both child support and maintenance, the SDU processes the combined payment without issue. However, the SDU will not process a maintenance-only payment and is legally required to return such payments to the sender. Because employers can only be directed to remit to the SDU, an income withholding order for maintenance alone faces a procedural obstacle in Illinois. Couples with maintenance-only awards often must use alternative collection methods, such as direct payment, a qualified domestic relations order for retirement-based payments, or court enforcement actions. The maintenance formula under 750 ILCS 5/504 calculates support as 33.33% of the payor's net income minus 25% of the recipient's net income, capped so the recipient's total income does not exceed 40% of the combined net incomes. This formula applies when combined gross income falls below $500,000.
Employer Duties and Penalties Under 750 ILCS 28/35
Illinois employers face a $100-per-day penalty for failing to comply with an income withholding order. Under 750 ILCS 28/35, if an employer knowingly fails to withhold the designated amount or fails to remit withheld funds to the SDU within 7 business days, the employer must pay $100 for each day the payment is late, with a statutory cap of $10,000.
Employers carry several mandatory obligations once an IWO arrives. The employer must begin withholding no later than the first pay period occurring 14 days after the notice was mailed. The employer must remit the withheld amount to the State Disbursement Unit within 7 business days of the pay date. The employer must continue withholding until formally notified that the order has terminated. Employers may not discharge, discipline, or refuse to hire an employee because of an income withholding order — doing so exposes the employer to additional penalties. The automatic wage deduction child support system depends on employer compliance, and Illinois enforces it aggressively. Employers who willfully fail to withhold may face personal liability for the unpaid support, not merely the daily penalty. An employer may deduct a small administrative fee from the employee's remaining wages for processing each withholding, as authorized by statute.
How to Start Wage Garnishment for Support in Illinois
Starting wage garnishment for support in Illinois requires preparing a standardized income withholding order and serving it on the obligor's employer. Because the IWO issues automatically with the support judgment under 750 ILCS 28/20, the receiving parent or their attorney typically prepares the federal OMB-approved IWO form and serves it directly on the employer by mail or electronic transmission.
The process follows a defined sequence:
- Obtain the underlying support order from the divorce or parentage judgment.
- Complete the federal Income Withholding for Support form (the standard format required by 750 ILCS 28/20).
- Include the current support amount, any arrears, and the 20% minimum arrears payment rate.
- Serve the completed IWO on the employer (the "payor") by mail or e-IWO.
- The employer begins withholding within 14 days and remits to the SDU within 7 business days.
No separate court motion is required to initiate withholding on a new order because the obligation arises directly from the support judgment. If an obligor changes jobs, the receiving parent serves a new IWO on the new employer. For interstate enforcement, Illinois honors out-of-state income withholding orders under the Uniform Interstate Family Support Act, allowing an Illinois employer to withhold on an order entered in another state. This streamlined process distinguishes support enforcement wage collection from the slower, court-dependent garnishment used for ordinary debts.
What Happens When Support Goes Unpaid in Illinois
When an obligor falls behind on support in Illinois, enforcement escalates beyond standard wage garnishment to license suspension, tax interception, and even jail. Illinois can garnish up to 65% of disposable income, intercept federal and state tax refunds, suspend driver's and professional licenses, deny passports for arrears exceeding $2,500, and pursue criminal contempt carrying up to 6 months in jail under 750 ILCS 5/505.
A notable 2024 change eliminated the 9% annual statutory interest on child support arrears, making it easier for parents to catch up on past-due balances without watching the debt compound. However, the underlying arrears remain fully collectible. The income withholding order automatically captures the 20% additional arrears payment alongside current support, steadily reducing the balance. If wage garnishment alone proves insufficient — for example, with a self-employed or unemployed obligor — the receiving parent may pursue contempt proceedings, bank account levies, liens on real property, or interception of lottery winnings. For a garnished wages alimony obligation bundled with child support, the same enforcement arsenal applies. Illinois treats support enforcement as a public priority, and the combination of automatic withholding and aggressive backup remedies makes it one of the most effective collection systems in the country.
Recent 2025 Changes Affecting Support and Garnishment
Illinois made significant changes to its maintenance and support statutes effective January 1, 2025, under Public Act 103-967. The most consequential change provides that incarceration no longer pauses maintenance — payments continue to accrue as arrears even while the paying spouse is in custody, reversing prior practice under 750 ILCS 5/504.
Under the 2025 amendments, an incarcerated obligor must affirmatively petition the court for modification rather than allowing the obligation to lapse automatically. All unpaid maintenance accumulates as a legal debt the recipient may collect after release. The amendments also raised the procedural bar for imputing income: before a court can attribute income to a spouse in a support matter, it must hold a formal evidentiary hearing where both parties present evidence, unless both sides mutually agree on the imputed figure. If the court imputes income, it must issue a written explanation identifying the specific statutory factors supporting the decision. The 2025 changes also formalized maintenance categories as "fixed-term," "indefinite," "reviewable," or "reserved by the court." These reforms strengthen the predictability of support obligations and, by extension, the income withholding orders that enforce them. As of January 2026, these amendments remain in effect. Verify current statutory text at the Illinois General Assembly website before relying on any provision.
Filing Costs and Verification
Divorce filing fees in Illinois range from $250 to $388 depending on the county, set by each circuit clerk rather than by statute. As of June 2026, Cook County charges $388 to file a dissolution petition and $251 for a responding appearance, while DuPage County charges $343 to file and $218 for an appearance. Verify with your local clerk.
Filing fees vary across all 102 Illinois counties because 750 ILCS 5/401 governs residency and grounds, not court costs. Other examples include Marion County at $321 and Stephenson County at $306. Illinois permits fee waivers under Illinois Supreme Court Rule 298 for households at or below 125% of the federal poverty guidelines — roughly $18,500 annual income for a single person in 2026. The 90-day residency requirement under 750 ILCS 5/401 applies to when judgment may be entered, not when you may file, so a petition can be filed earlier as long as one spouse completes 90 days of Illinois residency before final judgment. As of June 2026, these figures reflect publicly available clerk schedules. Always confirm exact amounts with the circuit clerk in your filing county.