How much does a divorce cost in Illinois in 2025

Last updated 2026-07-10

What is the average cost of a divorce in Illinois?

It depends almost entirely on one thing: contested or uncontested. Those two paths share a state and a courthouse and nothing else financially.

An uncontested divorce, where both spouses agree on property, debts, and any child issues, runs $335 to $1,500 total. That covers court filing fees plus, if you hire anyone, a document preparer or online service.

A contested divorce is a different animal. The Illinois State Bar Association's fee surveys have historically put average attorney fees in the $15,000 to $30,000 range per party for a case that goes through real litigation. Cases with custody battles, business valuation, or hidden assets routinely pass $50,000 per side. ^[1]

The national numbers add context. A 2023 survey by Martindale-Nolo Research found the average total divorce cost in the United States was about $7,000, but that figure flattens a sharp distribution: people who settled without a trial spent far less, while contested trials pulled the average up hard. Illinois, with high Chicago billing rates (often $300 to $600 per hour for family law), sits above the national midpoint for contested cases. ^[2]

Here is the one sentence to remember. The single most powerful thing you can do to control divorce cost in Illinois is reach agreement with your spouse before you file. Everything else is a rounding error.

What are the court filing fees for divorce in Illinois?

Every Illinois divorce starts with a filing fee paid to the circuit court clerk in the county where you file. Fees vary by county, get set by each county's fee schedule, and change periodically. Verify with your clerk's office before you file. ^[3]

Here are current approximate filing fees for some of the most populated counties:

County	Approximate Filing Fee (Petitioner)
Cook County	$338
DuPage County	$264
Lake County	$264
Will County	$261
Kane County	$253
Winnebago County	~$250

These are petition filing fees only. The respondent (the spouse who did not initiate the filing) also pays a fee to file their appearance, generally around $200 to $264 depending on the county. In Cook County, the respondent's appearance fee is $192. ^[3]

More costs can show up at the clerk's window: certified copy fees ($2 to $5 per page), a notary fee if the clerk offers that service, and a summons fee if you need the sheriff to serve your spouse ($60 on average in Cook County). If you and your spouse are cooperating, skip the sheriff and use an acknowledgment of service instead. That is free.

If you genuinely cannot afford the filing fee, Illinois courts waive it. You file an Application for Waiver of Court Fees (form CCG N002 in Cook County, or your county's equivalent). The income threshold is roughly 125% of the federal poverty level, though judges have some discretion. ^[4]

What does an uncontested Illinois divorce actually cost, start to finish?

Most people who file an uncontested divorce in Illinois spend money in three places: court fees, document preparation, and (sometimes) a notary.

Here is a realistic breakdown:

Cost Item	Typical Range
Filing fee (petitioner)	$253 to $338
Respondent appearance fee	$192 to $264
Document preparation (DIY)	$0
Document preparation (online packet)	$100 to $250
Attorney review (optional, one-time flat fee)	$300 to $800
Notary fees	$0 to $25
Certified copies of final decree	$10 to $40
Total, DIY	$445 to $630
Total, with document service	$600 to $1,200

If you have no minor children, no real property, and debts and assets that split easily, you can get through an Illinois uncontested divorce for under $700. That is not a teaser number. It reflects what the court actually charges plus the cost of getting your papers in order.

DivorceClear's document packet (currently $149 for a complete uncontested Illinois set) is one option for the paperwork step. A flat-fee document review from a local attorney is another. What I'd personally do: buy a packet or download the court's own forms, have one attorney do a one-hour flat-fee review before you file, and skip the retainer entirely. That review costs $150 to $300 and catches errors before a judge rejects your paperwork.

One thing people miss. Illinois has a mandatory 90-day waiting period from the date the petition is served before the court can enter a final judgment of dissolution. ^[5] That period costs nothing, but it means you should file the moment your paperwork is correct rather than sitting on it.

How much does a contested divorce cost in Illinois?

When spouses cannot agree, an attorney gets involved and the meter runs by the hour. Most Illinois family law attorneys charge $250 to $600 per hour, with Chicago-area partners at large firms often billing $400 to $700. ^[2]

A typical retainer at hire is $2,500 to $10,000, paid upfront. That retainer draws down as your attorney bills hours. When it runs out, you replenish it or the attorney may withdraw.

What actually drives contested divorce costs in Illinois:

Discovery. Interrogatories, depositions, subpoenas for financial records. A single deposition can cost $1,500 to $4,000 in attorney time plus court reporter fees.

Child custody disputes. If the court appoints a Guardian ad Litem (GAL) or a child representative, that professional charges their own hourly rate, often $200 to $400 per hour, and both parties typically share the cost. A GAL in a contested custody case can add $3,000 to $15,000 to the total bill.

Expert witnesses. Business valuators, forensic accountants, real estate appraisers, vocational evaluators for spousal support (see alimony for how Illinois handles maintenance). Each expert commonly charges $2,000 to $10,000 or more.

Trial. Most contested divorces settle before trial, but if yours goes the distance, a multi-day trial can cost each party $20,000 to $50,000 in attorney fees alone.

Illinois law lets one spouse ask the court to order the other to contribute to attorney fees, especially when there is a large income gap. This falls under 750 ILCS 5/508. ^[6] The court weighs each party's income and financial resources. It is not guaranteed, but worth knowing about if your spouse out-earns you by a lot.

What are Illinois residency and grounds requirements, and do they affect cost?

Illinois is a no-fault divorce state. The only ground is irreconcilable differences. ^[5] The old fault grounds (adultery, mental cruelty, and the rest) were eliminated when the Illinois Marriage and Dissolution of Marriage Act was amended effective January 1, 2016. This lowers costs for most people, because you cannot spend money litigating who wronged whom.

On residency, at least one spouse must have lived in Illinois for 90 days before the court can enter a final judgment. ^[5] You can file the petition before hitting 90 days, but the judge cannot finalize until the requirement is met.

These requirements do not directly add cost. Where timing bites is when one spouse just moved to Illinois. Filing early does not hurt you, but a judge may push the final hearing back.

If children are involved, the Uniform Child Custody Jurisdiction and Enforcement Act (UCCJEA) decides which state has jurisdiction over custody. If your children have not lived in Illinois for at least 6 months, the court may lack jurisdiction over custody, which complicates and lengthens the case. ^[7] More complexity means more attorney time, which means more cost.

Does having children make an Illinois divorce more expensive?

Yes, consistently and significantly.

When minor children are involved, Illinois requires a Parenting Plan (also called an Allocation of Parental Responsibilities Judgment) filed with the court. ^[5] If parents agree on this plan, drafting it adds some paperwork but no hearing. If they disagree, the court holds hearings and may appoint a Guardian ad Litem, which adds thousands of dollars.

Child support in Illinois uses an income shares model based on both parents' net incomes and the number of overnights each parent has. ^[8] The Illinois Department of Healthcare and Family Services maintains the official guidelines. Fights about income, parenting time percentages, or add-on costs (childcare, health insurance, extracurriculars) are among the most common drivers of contested litigation.

Use a child support calculator to estimate what the guidelines produce before you sit down to negotiate. Knowing the guideline number in advance often helps couples agree faster, which keeps costs down.

If children are the only contested issue, mediation is usually far cheaper than litigation. Illinois courts actively encourage (and some counties effectively require) mediation for parenting disputes. A mediator charges $150 to $300 per hour, and most parenting disputes resolve in two to four sessions, putting total mediation cost at $600 to $2,400, shared between the parties.

How does property and debt division affect divorce costs in Illinois?

Illinois divides marital property under an equitable distribution standard, meaning the court splits assets fairly but not necessarily 50/50. ^[9] The court weighs each spouse's contribution, the length of the marriage, each spouse's economic circumstances, and other equities.

For simple cases (a shared bank account, a car or two, some furniture), division adds almost nothing to cost. For complex cases, it becomes the dominant cost driver.

Real estate creates the most friction. If the marital home needs to be sold or transferred, you may need a real estate appraisal ($300 to $600), a QDRO (Qualified Domestic Relations Order) to divide a retirement account ($500 to $1,500 to draft, plus the plan administrator's fee), and attorney time to negotiate who gets what.

A QDRO is mandatory for dividing a 401(k), pension, or similar employer-sponsored retirement plan without triggering taxes and early withdrawal penalties. This is one place where skipping an attorney entirely gets expensive. A badly drafted QDRO gets rejected by the plan administrator, and fixing it costs more than doing it right the first time.

For divorce papers in an uncontested case with no retirement accounts and no real estate, the property division paperwork is straightforward and handled easily with a good self-help packet.

If you and your spouse carry significant marital debt, Illinois courts can assign responsibility for it in the divorce decree. That assignment binds you and your spouse to each other, but it does not release either of you from liability to the creditor. A lot of people miss that distinction, and it stings later.

What does spousal maintenance (alimony) cost to negotiate or litigate in Illinois?

Illinois calls it spousal maintenance, not alimony, but it works the same way. Under 750 ILCS 5/504, the court may award maintenance based on factors including each spouse's income and earning capacity, the standard of living during the marriage, and the length of the marriage. ^[6]

For marriages where combined gross income is $500,000 or less and no agreement exists, Illinois sets a statutory formula for the amount: 33.3% of the payer's net income minus 25% of the recipient's net income, capped so the recipient does not receive more than 40% of the combined net income. The duration formula is also statutory, based on years married multiplied by a factor ranging from 0.20 (marriage under 5 years) to 1.0 (marriage of 20 or more years). ^[6]

If both spouses agree on maintenance (or agree to waive it), this adds almost nothing to cost. If they fight over it, expect $5,000 to $20,000 in added attorney fees, because it often requires financial expert testimony about earning capacity.

For a full breakdown of how Illinois calculates and awards maintenance, see our guide on alimony. The statutory formula is a good starting point for negotiation even if you never see a courtroom.

What are the cheapest ways to get divorced in Illinois?

The cheapest legitimate path is an uncontested divorce where you prepare your own forms. Here is exactly how to hold the cost down:

Step 1: Reach full agreement first. Before you file anything, sit down with your spouse and work out every issue: property, debts, any parenting plan, any maintenance. Put it in a written list. This is free.

Step 2: Use official court forms. The Illinois Courts website provides standardized forms for dissolution of marriage. Illinois Legal Aid Online (illinoislegalaid.org) offers guided interviews that produce completed court forms for free. ^[10] This is genuinely useful and costs nothing.

Step 3: File in the right county. File where either spouse lives. Do not assume Cook County is fastest. Smaller counties often move faster.

Step 4: Serve your spouse by acknowledgment. If your spouse cooperates, they sign an Entry of Appearance and Waiver of Service, which eliminates sheriff service fees.

Step 5: Attend your prove-up hearing. In most counties, an uncontested divorce finalizes at a short (10 to 15 minute) hearing where you answer a few questions for the judge under oath. Some counties now allow this over Zoom.

Where I'd spend a little money: if you have any real estate, retirement accounts, or children, pay a flat-fee attorney for a one-time document review. Spend $200 to $400 before you file rather than $2,000 to fix rejected paperwork or a bad agreement later.

What I'd skip: full-service online divorce platforms charging $500 to $1,500 for what are basically the same forms the court hands out free. Pay for document help if you want it, but know exactly what you are buying.

Can you get a fee waiver for an Illinois divorce if you can't afford the filing fee?

Yes. Illinois Supreme Court Rule 298 and the court's Application for Waiver of Court Fees process let low-income filers ask the court to waive filing fees, service fees, and other court costs. ^[4]

The general income threshold is 125% of the federal poverty guidelines, though some courts extend waivers to people up to 200% of poverty if they show financial hardship. For 2025, 125% of the federal poverty level for a single person is about $18,975 in annual income.

To apply, fill out the Application for Waiver (form CCG N002 in Cook County, or your circuit's local version) and submit it with your divorce petition. A judge reviews it, usually the same day or within a few days. If granted, you pay nothing to file. If denied, you owe the standard fee.

Illinois Legal Aid Online has a guided version of this form. ^[10] If you qualify, there is no reason to let the filing fee stop you.

How long does a divorce take in Illinois, and does timing affect cost?

Illinois law mandates a minimum 90-day waiting period after service of the petition before a final judgment can be entered. ^[5] That is the floor. The real timeline swings hard depending on county and whether the divorce is contested.

Uncontested divorces in less-congested counties (downstate Illinois, smaller collar counties) often finalize in 3 to 5 months from filing. Cook County typically runs 4 to 6 months for uncontested cases, sometimes longer depending on which division your case lands in and judge availability.

Contested divorces in Cook County regularly take 12 to 24 months, and complex cases involving custody disputes, business valuations, or appeals can stretch to 3 years or more.

Time directly equals money in contested cases, because attorney billing is hourly. Every extra month means more depositions, more correspondence, more court appearances. This is why settlement, even an imperfect one, is almost always the right financial call.

For uncontested filers, timing hits your wallet through opportunity cost: a mortgage you are still jointly responsible for, a business you cannot cleanly separate, health insurance that lapses. Getting your paperwork right before you file, rather than having it rejected and refiled, is the best way to cut time and therefore indirect cost.

What hidden costs do Illinois divorce filers often miss?

The filing fee is what people plan for. Here is what surprises them:

QDRO drafting fees. Dividing a 401(k) or pension requires a separate legal document (the QDRO) approved by both the court and the plan administrator. Attorneys charge $500 to $1,500 to draft one. Some plan administrators add their own review fee. If you forget to include retirement accounts in your settlement, you cannot divide them later without going back to court.

Real estate transfer costs. Transferring a home from joint ownership to one spouse requires a new deed and may trigger transfer taxes. The Illinois state transfer tax is $0.50 per $500 of value. Cook County adds its own transfer tax on top. ^[11] A $300,000 home transfer costs roughly $300 in state transfer tax, plus the Cook County stamp. Not huge, but real.

Name change costs. If you are restoring your former name in the divorce, the decree handles the legal part, but you still update your Social Security card (free), driver's license ($30 in Illinois), passport ($130 to $165 renewal), and bank accounts.

Post-decree modifications. If you later need to change child support, parenting time, or maintenance, that requires a new court filing. Filing fees apply again, and if contested, attorney fees restart.

Credit impact. Not a direct cost, but if joint debts are not handled properly and an ex defaults, your credit takes the hit. Refinancing to remove a spouse from a mortgage costs 2% to 5% of the loan value in closing costs, which runs $6,000 to $15,000 on a typical Illinois home.

The lesson: draft a marital settlement agreement that covers every asset, every debt, every account. Leaving small things out creates expensive problems down the road.

Frequently asked questions

What is the filing fee for divorce in Cook County, Illinois?

As of 2025, the Cook County Circuit Court charges approximately $338 for the petitioner to file a divorce case. The respondent pays approximately $192 to file an appearance. These fees change periodically, so confirm the current amount with the Cook County Clerk of the Circuit Court before filing. A fee waiver is available for low-income filers under Illinois Supreme Court Rule 298.

Can I get a divorce in Illinois without a lawyer?

Yes. Illinois does not require an attorney for an uncontested divorce. You file your own forms, serve your spouse (or have them sign a waiver of service), and attend a short prove-up hearing. Illinois Legal Aid Online offers free guided form preparation. Many people handle simple uncontested cases entirely themselves for the cost of the filing fee plus any document preparation help.

How long does an uncontested divorce take in Illinois?

At minimum, 90 days from the date the petition is served, because Illinois law mandates that waiting period before a final judgment. In practice, uncontested divorces in smaller Illinois counties take 3 to 5 months total. Cook County typically takes 4 to 6 months for uncontested cases, depending on case assignment and judicial calendar. Having paperwork correct before you file is the best way to avoid delays.

How is property divided in an Illinois divorce?

Illinois uses equitable distribution, meaning marital property is divided fairly but not necessarily 50/50. Courts consider each spouse's contribution to the marriage, the length of the marriage, each party's economic circumstances, and other factors under 750 ILCS 5/503. Property owned before marriage or received as a gift or inheritance is generally separate property not subject to division, provided it was not commingled with marital assets.

What is the cheapest way to get a divorce in Illinois?

An uncontested divorce where you prepare your own forms is the cheapest route. Use free forms from the Illinois Courts website or Illinois Legal Aid Online, have your spouse sign a waiver of service to avoid sheriff fees, and attend your own prove-up hearing. Total cost in most counties is $450 to $650 in filing fees. If you want document help, a packet from an online preparation service typically costs $100 to $250 on top of that.

Does Illinois require separation before divorce?

No. Illinois eliminated the old separation requirement when it became a no-fault state effective January 1, 2016. You do not need to live apart for any minimum period before filing. The only mandatory waiting period is the 90-day period between service of the petition and entry of a final judgment. Spouses can continue living together during the divorce process if they choose to.

How is child support calculated in Illinois?

Illinois uses an income shares model. Both parents' net incomes are combined, and the child's support obligation is determined from a statutory table based on combined income and the number of children. That obligation is then allocated between parents proportionally to their income shares, adjusted for each parent's percentage of overnights. The Illinois Department of Healthcare and Family Services maintains the official guideline tables used in all Illinois courts.

What if my spouse refuses to sign divorce papers in Illinois?

Your spouse's signature is not required to get divorced in Illinois. You file the petition, serve them properly (via sheriff or process server if they will not sign a waiver), and if they do not respond within 30 days, you can request a default judgment. The court can finalize the divorce without the other spouse's participation. This does add cost because you likely need sheriff service ($60 to $100) and possibly a brief default prove-up hearing.

Are attorney fees tax deductible in an Illinois divorce?

Generally no, not under current federal tax law. The Tax Cuts and Jobs Act of 2017 eliminated miscellaneous itemized deductions, which previously allowed deduction of some divorce-related attorney fees. A narrow exception may apply for fees specifically attributable to tax advice in the divorce (such as the tax consequences of asset division), but this area is fact-specific. Consult a tax professional about your particular situation rather than relying on general guidance.

What forms do I need to file for an uncontested divorce in Illinois?

Core forms for an uncontested Illinois divorce include: Petition for Dissolution of Marriage, Summons (or Entry of Appearance and Waiver by the respondent), Marital Settlement Agreement (covering property, debt, and maintenance), Joint Parenting Plan if children are involved, Judgment for Dissolution of Marriage, and county-specific cover sheets. The Illinois Courts website and Illinois Legal Aid Online provide these forms. Your county's circuit court clerk can confirm exactly which forms their court requires.

How much does a divorce lawyer cost in Illinois?

Illinois family law attorneys typically charge $250 to $600 per hour in the Chicago metro area and $150 to $300 per hour in downstate markets. Most require an upfront retainer of $2,500 to $10,000. For an uncontested case, some attorneys offer flat fees of $1,000 to $3,000 to handle the entire matter. For a contested case with discovery and hearings, total fees of $15,000 to $30,000 per spouse are common; contested trials routinely cost far more.

Does Illinois offer legal aid or free divorce help?

Yes. Illinois Legal Aid Online (illinoislegalaid.org) provides free guided form preparation for divorce and related matters. Prairie State Legal Services and Legal Aid Chicago serve low-income residents in northern Illinois. Downstate options include Land of Lincoln Legal Aid. The Illinois Courts Self-Help Center also provides procedural information, though it cannot give legal advice. Eligibility for full legal aid representation is income-based, generally at or below 125% to 200% of federal poverty guidelines.

What happens to the marital home in an Illinois divorce?

Spouses can agree to sell the home and split proceeds, have one spouse buy out the other's equity, or defer sale under specific circumstances (often when minor children are involved and one parent stays in the home). If you cannot agree, the court decides under the equitable distribution standard. One spouse buying out the other usually requires refinancing the mortgage into one name, which triggers closing costs of 2% to 5% of the loan balance.

Is mediation required for divorce in Illinois?

Mediation is not universally required for all Illinois divorces, but it is effectively required for contested parenting issues in many counties. Cook County's domestic relations division often orders mediation for custody and parenting time disputes before allowing a contested hearing. Mediation typically costs $150 to $300 per hour, split between the parties. Even where not required, mediation is almost always cheaper than litigating disagreements, often resolving disputes in two to four sessions.

Sources

1. Illinois State Bar Association, Attorney Fee Survey: Average attorney fees for litigated Illinois divorce cases and hourly rate ranges for family law attorneys
2. Martindale-Nolo Research, Divorce Cost Survey 2023: Average total divorce cost in the United States is approximately $7,000; attorney hourly rates in major markets range $300 to $600+
3. Cook County Clerk of the Circuit Court, Fee Schedule: Cook County filing fee for divorce petition is approximately $338; respondent appearance fee approximately $192
4. Illinois Supreme Court, Rule 298 and Application for Waiver of Court Fees: Low-income filers may apply to waive court fees; income threshold generally 125% of federal poverty guidelines
5. Illinois Marriage and Dissolution of Marriage Act, 750 ILCS 5/401 and 5/413: Illinois is no-fault only (irreconcilable differences); 90-day waiting period after service required; 90-day residency requirement
6. Illinois Marriage and Dissolution of Marriage Act, 750 ILCS 5/504 and 5/508: Statutory maintenance formula and duration factors; court authority to award attorney fees based on income disparity
7. Illinois Uniform Child Custody Jurisdiction and Enforcement Act, 750 ILCS 36/201: Illinois courts require child to have lived in state for 6 months to have jurisdiction as home state for custody purposes
8. Illinois Department of Healthcare and Family Services, Child Support Guidelines: Illinois uses income shares model for child support calculation based on both parents' net incomes and parenting time
9. Illinois Marriage and Dissolution of Marriage Act, 750 ILCS 5/503: Illinois equitable distribution standard for marital property; factors court considers in division
10. Illinois Legal Aid Online, Divorce Forms and Guided Interviews: Free guided interview tool that produces completed Illinois divorce court forms at no cost
11. Illinois Department of Revenue, Real Estate Transfer Tax: Illinois state real estate transfer tax rate is $0.50 per $500 of property value
12. Illinois Courts, Self-Help Resources: Official Illinois court forms and procedural guidance for self-represented litigants in dissolution of marriage cases