The total cost of divorce in Illinois ranges from $700 for a simple uncontested case to over $50,000 for a contested divorce requiring litigation. The average Illinois divorce costs approximately $11,300 when including filing fees, attorney fees, and related expenses. Filing fees vary by county, ranging from $250 in smaller counties to $388 in Cook County, while divorce attorneys typically charge between $250 and $500 per hour depending on location and experience.
Key Facts: Illinois Divorce Costs
| Cost Category | Amount |
|---|---|
| Filing Fee | $250-$388 (varies by county) |
| Appearance Fee (Respondent) | $181-$251 |
| Waiting Period | None (irreconcilable differences presumed after 6 months living apart) |
| Residency Requirement | 90 days in Illinois before judgment |
| Grounds | No-fault only (irreconcilable differences) |
| Property Division | Equitable distribution (not necessarily 50/50) |
| Average Total Cost | $11,300 |
Filing Fees by County
The divorce filing fee in Illinois ranges from $250 to $388 depending on which county court handles your case. Cook County charges $388 to file a divorce petition, the highest rate in the state, while DuPage County charges $348 and Stephenson County charges $306. The responding spouse pays a separate appearance fee ranging from $181 to $251. These fees are current as of March 2026 but may change; verify with your local circuit clerk before filing.
Illinois allows fee waivers for those who cannot afford court costs. Under Illinois Supreme Court Rule 298, you may qualify if your household income falls at or below 125% of the federal poverty guidelines. For a single person in 2026, this means annual income below approximately $18,500. To request a waiver, submit an Application for Waiver of Court Fees to the court.
County Filing Fee Comparison
| County | Filing Fee | Appearance Fee |
|---|---|---|
| Cook County | $388 | $251 |
| DuPage County | $348 | $218 |
| Lake County | $337 | $206 |
| Stephenson County | $306 | $181 |
| Smaller Counties | $250-$300 | $150-$200 |
Attorney Fees and Hourly Rates
Illinois divorce attorneys charge between $250 and $500 per hour in metropolitan areas like Chicago and its suburbs, with experienced attorneys at large firms charging $500 to $800 or more per hour for complex cases. In rural Illinois counties, attorney rates typically range from $150 to $275 per hour. The total attorney fee depends entirely on whether your divorce is contested or uncontested, and whether issues like child custody, property division, or spousal maintenance require negotiation or litigation.
For an uncontested divorce where spouses agree on all terms, attorney fees typically range from $2,500 to $7,000. Many attorneys offer flat-fee arrangements for straightforward uncontested cases, charging $1,500 to $3,500 for the complete process including document preparation, filing, and final hearing representation.
Contested divorces cost substantially more. The average contested divorce in Illinois costs between $15,000 and $30,000 per spouse, including attorney fees and court costs. Cases involving significant assets, business valuations, or custody disputes can exceed $50,000 per spouse. High-conflict custody battles add $15,000 to $40,000 to total costs due to Guardian ad Litem fees, custody evaluations, expert witnesses, and multiple court hearings.
Uncontested vs. Contested Divorce Costs
An uncontested divorce in Illinois costs between $700 and $7,000 depending on whether you use self-help resources, an online divorce service, or full attorney representation. An uncontested divorce requires both spouses to agree on all issues including property division, debt allocation, spousal maintenance, and if applicable, parenting time and child support. The lower cost reflects reduced attorney hours and the elimination of court hearings beyond the final prove-up.
A contested divorce costs $15,000 to $50,000 or more per spouse. Contested cases require extensive discovery, multiple court appearances, potential motions practice, and possibly trial. Each additional disputed issue increases costs: property valuation disputes may require hiring appraisers ($300-$1,000 per asset), business interests require forensic accountants ($5,000-$20,000), and custody disputes may require psychological evaluations ($2,500-$5,000).
Cost Comparison: Uncontested vs. Contested
| Factor | Uncontested | Contested |
|---|---|---|
| Attorney Fees | $1,500-$5,000 | $10,000-$40,000+ |
| Filing Fees | $250-$388 | $250-$388 |
| Timeline | 2-4 months | 12-24 months |
| Court Appearances | 1 (final hearing) | 5-15+ hearings |
| Total Cost | $700-$7,000 | $15,000-$50,000+ |
Joint Simplified Dissolution: The Cheapest Option
Illinois offers Joint Simplified Dissolution for couples meeting strict eligibility requirements, costing as little as $400 to $700 total including filing fees. Under 750 ILCS 5/452, couples must meet all of the following criteria: married no more than 8 years, no minor or dependent children, no real estate ownership, total marital property under $50,000, no retirement benefits (except IRAs under $10,000 combined), neither spouse earns more than $30,000 annually, combined gross income under $60,000, and both parties waive spousal support.
Both spouses file jointly, divide all property and debts by written agreement, and typically complete the process in a single court appearance on the same day as filing. No attorney is required, though consultation with an attorney beforehand ($150-$300 for a brief consultation) helps ensure you understand your rights before waiving spousal support and property claims.
Mediation Costs
Divorce mediation in Illinois costs $100 to $500 per hour depending on the mediator's experience and credentials. Most couples spend $1,000 to $5,000 total on mediation, completing the process in 3 to 8 sessions. Mediation can save $5,000 to $30,000 compared to litigation by helping spouses reach agreements on contested issues without expensive court battles.
Some Illinois circuit courts offer court-ordered mediation at reduced rates, often starting with a free first session. The Sixth Judicial Circuit, for example, provides mediation services to help resolve parenting disputes before trial. Even when both spouses hire attorneys, using mediation to resolve disputes costs significantly less than preparing for and conducting a trial.
Guardian ad Litem Fees
When parents cannot agree on parenting arrangements, Illinois courts often appoint a Guardian ad Litem (GAL) to represent the children's interests. Under 750 ILCS 5/506, GALs are licensed attorneys who investigate the family situation and make recommendations to the court about parenting time and decision-making responsibilities. GALs typically charge $150 to $300 per hour, with total fees ranging from $3,000 to $10,000 depending on case complexity.
GAL fees are typically split between the parents unless one parent receives a fee waiver or the court orders a different allocation based on the parties' financial circumstances. A parent with significantly higher income may be ordered to pay a greater share. The GAL appointment adds substantial cost to contested custody cases but often helps parents reach agreements by providing an independent perspective on what serves the children's best interests.
Property Division Costs
Illinois uses equitable distribution rather than community property rules, meaning courts divide marital property fairly but not necessarily equally. Under 750 ILCS 5/503, the court considers 12 statutory factors including each spouse's contributions, the duration of the marriage, each party's economic circumstances, and the custodial parent's need to occupy the marital home. Property division in complex cases adds significant costs through professional valuations and forensic analysis.
Real estate appraisals cost $300 to $600 per property. Business valuations range from $5,000 to $20,000 depending on business complexity and the valuation method required. Pension valuations and QDRO preparation cost $1,500 to $3,500. Forensic accountants investigating dissipation of marital assets or hidden income charge $250 to $450 per hour, with total fees of $5,000 to $20,000 in complex cases.
Spousal Maintenance (Alimony) Costs
Disputes over spousal maintenance add attorney fees for negotiation, motion practice, and potentially trial. Under 750 ILCS 5/504, maintenance is calculated using a statutory formula for couples with combined gross income under $500,000: 33.3% of the higher-earning spouse's net income minus 25% of the lower-earning spouse's net income. The receiving spouse's maintenance cannot exceed 40% of the combined net income.
The duration of maintenance depends on the length of marriage: 20% of the marriage duration for marriages under 5 years, increasing by 4% for each additional year up to 80% for 19-year marriages. Marriages lasting 20 years or more may result in permanent maintenance. Disputes over income calculations, deviations from guidelines, or duration add $2,500 to $10,000 or more in attorney fees.
Maintenance Duration by Marriage Length
| Marriage Length | Maintenance Duration |
|---|---|
| Under 5 years | 20% of marriage length |
| 5-9 years | 24-36% of marriage length |
| 10-14 years | 44-56% of marriage length |
| 15-19 years | 60-80% of marriage length |
| 20+ years | Indefinite or equal to marriage length |
Child Support Costs
Child support calculations in Illinois follow the Income Shares Model under 750 ILCS 5/505. Both parents' net incomes are combined, then a basic support obligation is determined using state guidelines based on combined income and number of children. Each parent pays their proportionate share of this obligation. When parents share parenting time equally (146+ overnights each per year), the calculation adjusts using a 1.5 multiplier on the basic obligation.
Disputes over income determination, deviation requests, or enforcement add attorney costs. Establishing or modifying child support typically adds $1,500 to $5,000 in attorney fees for straightforward cases. Disputes involving self-employment income, hidden assets, or special needs children can add $5,000 to $15,000 in attorney and expert fees.
Hidden Costs Many Overlook
Beyond filing fees and attorney costs, divorce involves numerous additional expenses that can add $2,000 to $10,000 to total costs. Required parenting education classes cost $50 to $150. Certified copies of the divorce decree cost $10 to $25 each, and most people need multiple copies for name changes, insurance updates, and financial institutions.
Moving costs average $1,000 to $5,000 for establishing a separate household. Refinancing the mortgage to remove a spouse costs $3,000 to $6,000 in closing costs. Updating estate planning documents (new will, powers of attorney, beneficiary designations) costs $500 to $2,000. COBRA health insurance coverage for a spouse leaving the other's employer plan costs $500 to $1,500 per month.
How to Reduce Illinois Divorce Costs
Choosing mediation or collaborative divorce over litigation saves $5,000 to $30,000 in attorney fees by resolving disputes outside of court. Reaching agreements on property division, support, and parenting before filing eliminates the expense of motion practice and contested hearings. Using a flat-fee attorney for uncontested cases provides cost certainty compared to hourly billing.
Organizing financial documents before meeting with an attorney reduces the hours billed for document review. Many attorneys charge $300 to $500 per hour; arriving at your first meeting with tax returns, bank statements, retirement account statements, and a property inventory can save $1,000 or more in billable time. Communicating with your attorney by email rather than phone when possible creates a record and allows for more efficient responses.
Qualifying for Joint Simplified Dissolution eliminates most legal costs entirely. If you meet the eligibility requirements (married under 8 years, no children, limited assets and income), completing the process pro se costs only the filing fee plus minimal court costs.
Timeline and Its Impact on Costs
The length of your divorce directly impacts total cost. Uncontested divorces in Illinois typically finalize in 2 to 4 months, limiting attorney fees to document preparation and a single court appearance. Contested divorces take 12 to 24 months on average, with high-conflict cases extending to 3 years or more. Each additional month adds attorney fees for ongoing case management, correspondence, motion practice, and court appearances.
Illinois has no mandatory waiting period before filing or finalizing divorce. Under 750 ILCS 5/401, either spouse must have resided in Illinois for 90 days before the court enters a judgment of dissolution. The irreconcilable differences ground requires that spouses have lived separate and apart for 6 months, though this requirement is met if both parties agree the marriage is irretrievably broken.
Frequently Asked Questions
What is the average cost of divorce in Illinois?
The average cost of divorce in Illinois is approximately $11,300 including attorney fees, filing fees, and related expenses. Uncontested divorces cost $700 to $7,000, while contested divorces range from $15,000 to $50,000 or more per spouse depending on the complexity of disputed issues.
How much does it cost to file for divorce in Illinois?
Filing for divorce in Illinois costs between $250 and $388 depending on the county. Cook County charges the highest fee at $388, while smaller counties charge $250 to $300. The responding spouse pays a separate appearance fee of $181 to $251. Fee waivers are available for those with household income at or below 125% of federal poverty guidelines.
Can I get a divorce in Illinois without an attorney?
Yes, you can file for divorce in Illinois without an attorney (pro se), particularly for Joint Simplified Dissolution cases meeting strict eligibility requirements. Pro se divorce costs only filing fees ($250-$388) plus court costs. However, cases involving children, substantial assets, or complex issues benefit from legal representation to protect your rights.
How much do divorce attorneys charge in Illinois?
Illinois divorce attorneys charge $250 to $500 per hour in metropolitan Chicago and suburbs, with experienced attorneys at large firms charging $500 to $800 or more hourly. Rural Illinois attorneys typically charge $150 to $275 per hour. Many attorneys offer flat fees of $1,500 to $3,500 for simple uncontested divorces.
How long does a divorce take in Illinois?
An uncontested divorce in Illinois takes 2 to 4 months from filing to final judgment. Joint Simplified Dissolution can be completed in a single day. Contested divorces typically take 12 to 24 months, with high-conflict cases potentially lasting 3 years or more depending on the issues in dispute.
Is Illinois a 50/50 divorce state?
No, Illinois is not a 50/50 divorce state. Illinois uses equitable distribution, meaning courts divide marital property fairly but not necessarily equally. Under 750 ILCS 5/503, judges consider 12 statutory factors including each spouse's contributions, marriage duration, and economic circumstances to determine a fair division, which may result in splits of 60/40, 70/30, or other ratios.
How is alimony calculated in Illinois?
Illinois calculates spousal maintenance using a statutory formula for couples with combined gross income under $500,000. The amount equals 33.3% of the payer's net income minus 25% of the recipient's net income, capped at 40% of combined net income. Duration ranges from 20% of marriage length for short marriages to indefinite for marriages of 20 years or more.
What is the cheapest way to get divorced in Illinois?
The cheapest way to divorce in Illinois is through Joint Simplified Dissolution, costing $400 to $700 total. You must meet strict requirements: married under 8 years, no children, no real estate, total marital property under $50,000, combined income under $60,000, and both spouses agree to waive support. Both parties file jointly and can complete the process in one court appearance.
Do I have to pay spousal support in Illinois?
Spousal maintenance in Illinois is not automatic. Courts award maintenance based on statutory factors including each spouse's income, earning capacity, standard of living during marriage, and contributions to the other's career. The higher-earning spouse may be ordered to pay if there's a significant income disparity and the receiving spouse lacks sufficient property or income for self-support.
How much does a Guardian ad Litem cost in Illinois?
Guardian ad Litem fees in Illinois range from $3,000 to $10,000 depending on case complexity. GALs charge $150 to $300 per hour and are appointed in contested custody cases to investigate and recommend parenting arrangements in the children's best interests. Fees are typically split between parents unless the court orders otherwise based on financial circumstances.