Illinois divorce process: what to expect from start to finish

Last updated 2026-07-09

What are the basic requirements to file for divorce in Illinois?

Illinois calls divorce a "dissolution of marriage." That's the statutory term. You don't need to think about it beyond filling in the right blanks on your forms. Three requirements get you in the door.

First, residency. Either you or your spouse must have lived in Illinois for at least 90 days before filing. ^[1] That's the only residency clock. You don't have to file in the county you moved from or the county your spouse lives in, as long as one of you meets the 90-day rule somewhere in Illinois.

Second, grounds. Illinois became a no-fault-only state in 2016. The only grounds now are "irreconcilable differences," which means the marriage is broken and can't be fixed. ^[2] You don't prove fault. You don't argue about who cheated. If you've lived separately for at least six months, the law presumes irreconcilable differences exist. But you don't even need the six months if both spouses agree the marriage is irretrievably broken.

Third, the 90-day post-filing wait. Even after you file, an Illinois court can't enter a final judgment until at least 90 days have passed since the respondent was served or appeared. ^[3] This is a hard floor. Judges can't waive it.

Those three things clear the threshold. Property division, custody, and support all layer on top of them.

How does the Illinois divorce process work step by step?

Here's the real sequence, stripped of legalese.

Step 1: Meet residency. Confirm that one of you has lived in Illinois for 90 days. If you just moved, you may have to wait.

Step 2: Prepare your forms. The Illinois Marriage and Dissolution of Marriage Act governs what goes in your petition. ^[2] At minimum you need a Petition for Dissolution of Marriage, a Summons, and (if you have minor children) a Parenting Plan and Financial Affidavit. The Illinois Courts website posts standardized forms. ^[4] Some counties add local forms, so check your county circuit court's self-help page before you print anything.

Step 3: File with the circuit court. You file in the circuit court of the county where either spouse lives. Bring your original plus copies. The clerk stamps everything, keeps the original, and hands your copies back. You pay the filing fee at the window. Fees vary by county: Cook County charges about $388 for a dissolution, downstate counties run roughly $289 to $340. ^[5] Ask the clerk for a fee waiver form (Application to Sue or Defend as an Indigent Person) if the cost is a hardship.

Step 4: Serve your spouse. Your spouse (the "respondent") has to be formally notified. Three options: sheriff service, a licensed process server, or an Entry of Appearance and Waiver if your spouse agrees to skip formal service. The waiver is the cleanest route in uncontested cases. Read up on what goes into divorce papers so you know exactly what your spouse is signing.

Step 5: Wait 90 days. The clock starts the day the respondent is served or files an appearance. Use the time to settle any open issues, finalize your marital settlement agreement, and finish your parenting plan if you have kids.

Step 6: File your settlement and set the prove-up. Once you agree on everything, you file your Marital Settlement Agreement (and Parenting Plan if it applies), then schedule a short hearing called a "prove-up." The petitioner appears, answers a handful of questions confirming the marriage, residency, and that the agreement is voluntary, and the judge signs off. The hearing usually runs under 15 minutes. ^[4]

Step 7: Get your judgment entered. The judge signs the Judgment for Dissolution of Marriage. The clerk enters it. You're divorced. Order certified copies for name changes, bank accounts, real estate, and anywhere else you'll need proof.

What does it cost to get divorced in Illinois?

Filing fees are the floor, not the ceiling. A no-kids, uncontested case where you prepare your own forms runs about $350 to $500 total in Cook County and $250 to $400 elsewhere. Here's where the money goes.

The court filing fee is set county by county. Cook County (Chicago) charges about $338 to $388 depending on whether minor children are involved. ^[5] Downstate counties cluster in the $289 to $340 range. Can't afford it? File an Application to Sue as an Indigent Person with your petition, and the circuit court can waive fees entirely based on your income.

Hire a lawyer for the whole case and the picture changes fast. A straightforward uncontested divorce with full representation runs $3,000 to $10,000 or more. Let it turn contested and you're looking at $15,000 to $30,000 or more. ^[6] Those figures come from Illinois State Bar Association referral data and national benchmarks. Nobody has clean statewide numbers on this.

The middle path is DIY with a document preparation service. A packet covering every required Illinois form (petition, summons, marital settlement agreement, parenting plan, financial affidavit, judgment) usually runs $100 to $200. DivorceClear's packet costs $149 and covers a complete uncontested Illinois case. You still file it yourself and represent yourself. You're just not staring at blank forms.

Service of process costs money too. Sheriff service in most Illinois counties runs $60 to $80. A private server is similar. The Entry of Appearance and Waiver costs nothing if your spouse signs voluntarily.

A Financial Affidavit is required any time maintenance (alimony) or child support is at issue. ^[7] Filing it costs nothing extra, but it means gathering tax returns, pay stubs, and bank statements before your hearing.

How long does a divorce take in Illinois?

The 90-day wait is the hard minimum. No judge can sign a final judgment before day 90 from service or appearance. ^[3] Full stop.

In practice the timeline looks like this:

Case type	Typical total timeline
Uncontested, no children	3 to 5 months
Uncontested, with children	4 to 6 months
Contested, no trial	6 to 18 months
Contested, goes to trial	18 months to 3+ years

Those ranges come from the structure of the law and general practitioner experience. Illinois doesn't publish statewide case disposition data in a clean downloadable format, so precise averages are hard to pin down.

The biggest variable in uncontested cases isn't the 90-day wait. It's court scheduling. In Cook County, prove-up hearings in uncontested matters can sometimes get scheduled within 2 to 4 weeks of the 90-day window opening. In other counties, the wait for a hearing slot stretches an extra month or two. Call the clerk's office the day you file and ask how far out they're booking uncontested hearings. That one phone call saves you guessing about your own timeline.

If you have minor children, the court must approve your Parenting Plan before entering the judgment. When parents can't agree on terms, the court may bring in a Guardian ad Litem or order a 604.10 evaluation. Both add months and money. ^[7]

What forms do you actually need to file for an Illinois divorce?

Illinois has state-standardized forms for most core documents, listed on the Illinois Courts self-help pages. ^[4] An uncontested case without children typically needs:

• Petition for Dissolution of Marriage (the opening document; states your residency, grounds, and what you're asking for)
• Summons (directs your spouse to respond; the clerk issues it after you file the petition)
• Entry of Appearance / Waiver of Service (if your spouse agrees to skip formal service)
• Marital Settlement Agreement (the contract covering property, debt, and any maintenance)
• Judgment for Dissolution of Marriage (the final order the judge signs; you draft it in advance and the judge reviews it)
• Domestic Relations Cover Sheet (required in most counties)

If you have minor children, add:

• Parenting Plan (required in every case with children under 18; covers parental responsibilities and parenting time) ^[7]
• Financial Affidavit (both parties file one when support is at issue)
• Child Support Worksheet (Illinois uses an Income Shares model as of 2017; the Illinois Department of Healthcare and Family Services runs a free online calculator) ^[8]

Some counties, including Lake, DuPage, and Kane, have their own local forms on top of the state set. Check the circuit court's website for local rules before you finalize anything.

Understanding what divorce papers legally require is the most common stumbling block for people filing without a lawyer. The forms aren't hard to fill out. The trick is knowing which ones your specific county wants.

How does Illinois handle property division in a divorce?

Illinois is an equitable distribution state, not a community property state. ^[2] Marital property gets divided fairly, which doesn't automatically mean 50/50. Courts weigh length of marriage, each spouse's income and earning potential, contributions to the marital estate (including homemaking), and any prenuptial agreement.

Marital property is generally everything acquired during the marriage. Separate property, meaning things you owned before the marriage or received as a gift or inheritance even during it, stays with the original owner as long as it hasn't been commingled. ^[12] Commingling is a real trap. Inherit $40,000, deposit it into a joint account, and a court may treat the whole thing as marital.

In an uncontested divorce, you and your spouse decide how to split everything and write it into your Marital Settlement Agreement. The court doesn't pick the deal apart unless it's wildly one-sided or involves children's assets. This is where DIY pays off. You're not paying a lawyer to negotiate what you already settled at your kitchen table.

For the family home, you have three options: sell and split the proceeds, one spouse buys out the other, or defer the sale (sometimes used when kids are still in school). If there's a mortgage, talk to your lender before you finalize anything. A divorce decree doesn't release a spouse from loan liability. A refinance or assumption is usually required.

Retirement accounts have their own rules. Dividing a 401(k) or pension takes a Qualified Domestic Relations Order (QDRO), a separate court order sent to the plan administrator. ^[9] Plenty of people forget to file the QDRO after the divorce is final and lose the right to those assets. Don't be one of them.

How does child custody work in Illinois divorce?

Illinois dropped the word "custody" from its statutes in 2016. The current framework uses "parental responsibilities" (who decides about health, education, religion, and activities) and "parenting time" (the actual schedule). ^[7] The split matters because you can divide decision-making differently from parenting time.

Parents who agree on both write a Parenting Plan and submit it. The court must approve the plan and can reject it if the terms aren't in the child's best interest. ^[7] Illinois uses a multi-factor best-interest standard that includes the child's wishes (weighted by age and maturity), each parent's relationship with the child, and each parent's willingness to support the other parent's relationship with the child.

When parents can't agree, the court decides. That process can pull in a Guardian ad Litem, a mediator, or a Section 604.10(b) custody evaluation. Each one adds cost and time. This is the single biggest reason contested divorces with kids get expensive fast.

Child support runs on an Income Shares formula that combines both parents' net incomes and applies them to a state schedule. ^[8] The Illinois Department of Healthcare and Family Services publishes a free online calculator at dhs.illinois.gov. Use it. It's the same formula the judge uses.

Child support orders can be modified later on a substantial change in circumstances: a big income shift, a change in parenting time, or a real change in the child's needs.

What is maintenance (alimony) in Illinois and how is it calculated?

Illinois calls alimony "maintenance." Under 750 ILCS 5/504, courts weigh about a dozen factors to decide whether to award it: each spouse's income and property, realistic earning capacity, needs, the standard of living during the marriage, and the length of the marriage, among others. ^[2]

For couples whose combined gross income doesn't top $500,000, Illinois has a statutory formula for the amount: 33.3% of the payor's net income minus 25% of the payee's net income. The maintenance plus the payee's net income can't exceed 40% of the combined net income. ^[2]

Duration is formulaic too for marriages under 20 years. The statute multiplies the length of the marriage by a factor that scales from 0.20 (a marriage under 5 years) to 0.80 (a marriage of 19 years). A 10-year marriage yields 0.60 x 10 = 6 years of maintenance. Marriages of 20 years or more can result in permanent maintenance at the court's discretion. ^[2]

In an uncontested divorce, you and your spouse can agree on an amount and duration different from the formula, or waive maintenance entirely. Courts generally accept a knowing, voluntary waiver. Getting that waiver written into your Marital Settlement Agreement correctly is the part that matters.

Can you file for divorce in Illinois without a lawyer?

Yes. Nothing in Illinois law requires an attorney. The Illinois Courts publish self-help resources precisely because self-represented litigants are common. ^[4] Judges see pro se parties in uncontested matters every single day.

DIY makes clear sense when you and your spouse agree on everything, your assets are mostly simple (no complex pension, no business interests), and you either have no children or already worked out a clear parenting arrangement. That describes a lot of divorces. The divorce rate in America has hovered around 40 to 45% of first marriages, and plenty of those end amicably enough that neither party needs courtroom representation.

Talk to a divorce attorney when the stakes are real: a spouse is hiding assets, there's domestic violence, you own a business with meaningful value, you're entitled to a pension or stock options, or you have kids and can't agree on parenting terms. In those cases a lawyer's fee is often smaller than the cost of getting it wrong. You can also hire a lawyer for a few hours just to review your agreement, no full representation required.

The Illinois State Bar Association runs a Lawyer Referral Service at isba.org, and Legal Aid Chicago (legalaidchicago.org) helps income-qualifying residents for free. Both are worth a bookmark.

For straightforward uncontested cases, DivorceClear's $149 document packet gives you the complete Illinois form set, pre-filled to your situation, which you then file yourself. Here's the honest pitch: it's not legal advice, it's the right paperwork organized correctly so you're not guessing at blank forms.

How is an Illinois divorce different from a Washington state divorce?

People compare the two states when they've lived in multiple places or a spouse has moved. The differences are real, and the biggest one is financial.

Washington is a community property state. Illinois is equitable distribution. ^[10] In Washington, marital property generally splits 50/50 unless there's good reason to deviate. In Illinois, a judge decides what's "fair" across a range of factors, so the outcome is less predictable if it ends up in front of a judge.

Both states use a 90-day clock, but they start it differently. Washington counts 90 days from the date the petition is filed. Illinois counts 90 days from service or appearance. ^[3] Same length, different starting gun.

The final document has different names. Washington calls it a "Decree of Dissolution." Illinois calls it a "Judgment for Dissolution of Marriage." Same legal effect.

Washington's filing fees are set by county but generally run around $280 to $314 for an uncontested dissolution. In King County (Seattle area) the fee is about $314. ^[11] Illinois fees, as noted, run $289 to $388 depending on county.

Both states allow no-fault divorce. Both require one spouse to be a resident, though Washington's statute sets no specific day threshold and courts just expect a meaningful connection. ^[10]

If you actually have a choice of where to file, the community property versus equitable distribution split is the difference that moves the most money. Talk to a divorce lawyer in both states before you decide, if real assets are at stake.

What happens at the prove-up hearing in Illinois?

The prove-up is the final hearing in an uncontested Illinois divorce. It's short and low-stress if you're prepared. The whole thing usually runs 5 to 15 minutes.

You (the petitioner) appear before the judge. Your spouse may not need to show up. In most uncontested cases, if your spouse filed an Entry of Appearance, they can skip it. Check with your county's clerk or self-help center to confirm local practice.

The judge (or sometimes a clerk reading from a script) asks a standard set of questions: your name, how long you've lived in Illinois, your marriage date, whether the marriage is irretrievably broken, whether you signed the Marital Settlement Agreement voluntarily, and whether you understand its terms. You answer, mostly yes. ^[4]

The judge reviews the agreement and the proposed judgment. If it all checks out, the judge signs the Judgment for Dissolution of Marriage on the spot. The clerk enters it into the record. You walk out with a file-stamped copy.

Then it's over.

Bring your photo ID, your file-stamped copies of everything, the original proposed Judgment for Dissolution for the judge to sign, and your Marital Settlement Agreement. Some judges want the original document, so ask when you schedule.

After the hearing, order at least two certified copies of the judgment. They cost $6 to $12 each depending on the county. You'll need them for the Social Security Administration if you're changing your name, plus the DMV, banks, and any real estate title update.

What are the most common mistakes people make filing their own Illinois divorce?

Knowing the process is one thing. Dodging the pitfalls is another. These are the ones that trip up self-filers.

Wrong county. File in the wrong county and your case gets kicked back with no refund of the filing fee. Confirm at least one of you lives in the county you're filing in, or that proper venue exists.

Missing local forms. Illinois has state-standard forms, but DuPage, Lake, and others require supplemental local forms. File only the state set in a county that wants local ones and your case stalls.

Vague settlement agreements. Judges reject agreements that say things like "we'll split the furniture fairly." Every asset and debt needs a specific disposition. Keeping the house? Say so explicitly, and name who's responsible for the mortgage.

Forgetting the QDRO. If a retirement account needs dividing, the QDRO is a separate order that has to be prepared and sent to the plan administrator after the divorce. ^[9] Forget it and you can lose the asset. Fixing it later isn't easy or automatic.

Skimping on the Financial Affidavit. Any time maintenance or child support is involved, both parties file a Financial Affidavit. Courts treat incomplete or sloppy affidavits as a reason to continue the case.

Serving the wrong way. Mail the petition to your spouse and if they don't sign the acknowledgment, service isn't complete. Your 90-day clock never started.

Name change left out of the judgment. Want your former name back? Request it in the petition and make sure it lands in the final judgment. Adding it afterward takes a separate motion.

Frequently asked questions

How long do you have to live in Illinois before you can file for divorce?

Either you or your spouse must have lived in Illinois for at least 90 days before you file. The 90-day residency requirement is in 750 ILCS 5/401. If you just moved to the state, you may need to wait until you hit that threshold. The county you file in should be where one of you lives, but the residency period is a statewide rule, not county-specific.

Does Illinois require separation before divorce?

No mandatory separation period is required. Illinois does use a six-month separation as a legal presumption of irreconcilable differences, which can simplify proving grounds. But if both spouses agree the marriage is irretrievably broken, you can file with no separation period at all. The 2016 amendment to the Illinois Marriage and Dissolution of Marriage Act eliminated fault-based grounds entirely.

What is the filing fee for divorce in Illinois?

Filing fees vary by county. Cook County charges about $388 for a dissolution with minor children and somewhat less without. Most downstate counties range from $289 to $340. If you can't afford the fee, file an Application to Sue as an Indigent Person. Fee waiver eligibility is based on income and varies by county. Confirm current fees with the circuit court clerk before you go.

Can I get divorced in Illinois if my spouse doesn't agree?

Yes. If your spouse refuses to participate, you can get a divorce by default after properly serving them and waiting the required time for a response (typically 30 days). A default judgment lets the court grant the divorce and divide property based on what you requested. Contested divorces where the spouse actively fights take much longer and cost significantly more than uncontested ones.

How does Illinois divide debt in a divorce?

Illinois divides marital debt under the same equitable distribution standard as property. Debt incurred during the marriage for marital purposes is generally marital debt. Your Marital Settlement Agreement should spell out who pays each debt. Keep in mind a divorce decree doesn't release you from a joint loan in a creditor's eyes. If your spouse is assigned a joint credit card and stops paying, it still damages your credit.

What is a Marital Settlement Agreement in Illinois?

A Marital Settlement Agreement (MSA) is the written contract between divorcing spouses covering how property, debts, and any maintenance are handled. In an uncontested divorce it's the core document the judge approves. It has to be specific: vague terms like 'equitable split' will likely be rejected. Once signed and folded into the judgment, it becomes a court order enforceable like any other.

How is child support calculated in Illinois?

Illinois uses an Income Shares model, meaning both parents' net incomes are combined and applied to a state schedule to set the base support amount. The Illinois Department of Healthcare and Family Services provides a free online calculator at dhs.illinois.gov. Each parent's share is proportional to their share of combined income. Costs like health insurance and childcare are typically allocated on top of base support.

Do I have to go to court if my divorce is uncontested in Illinois?

Yes, but just once and briefly. You'll attend a prove-up hearing and answer a few questions before the judge confirming residency, that the marriage is broken, and that you signed the settlement agreement voluntarily. The hearing usually runs under 15 minutes. Your spouse may not need to appear if they filed an Entry of Appearance. Some rural counties allow default prove-ups by affidavit, but most want the petitioner there in person.

Can I change my name in an Illinois divorce?

Yes. Request your former name restoration in the original petition and make sure it's included in the Judgment for Dissolution of Marriage. The judge signs the name change as part of the divorce order. You then use the certified copy of the judgment to update your Social Security card, driver's license, passport, and financial accounts. If you forget to include it in the judgment, restoring your name takes a separate legal process.

What is the difference between contested and uncontested divorce in Illinois?

In an uncontested divorce, both spouses agree on all terms: property, debt, support, and parenting. You prepare the paperwork, file it, wait 90 days, and attend one short hearing. In a contested divorce, spouses disagree on one or more issues, which triggers motion practice, discovery, possibly a Guardian ad Litem for children, and maybe a trial. Contested divorces routinely cost $15,000 to $30,000 or more and can take one to three years.

Does Illinois recognize legal separation?

Yes. Legal separation is a separate legal status from divorce in Illinois. It lets the court divide property, set support, and establish parenting arrangements without ending the marriage. Some couples use it for religious reasons or to stay on a spouse's health insurance (though that's increasingly limited under insurance rules). You can convert a legal separation to a full dissolution later if you choose.

What happens to the family home in an Illinois divorce?

The family home is marital property if it was acquired during the marriage. Options in an uncontested divorce include selling and splitting proceeds, one spouse buying out the other's equity, or a deferred sale (often used when minor children are in school). If there's a mortgage, the lender's rules govern, and a divorce decree alone doesn't remove a spouse from the loan. A refinance in one name is usually required to fully sever the tie.

Can I use online forms or a document service for my Illinois divorce?

Yes. Illinois provides free state-standard forms through the Illinois Courts self-help pages. Many people also use a paid document preparation service that fills in the forms from your answers. Document services aren't law firms and can't give legal advice, but they organize the correct paperwork for your county and situation, which saves real time. Expect to pay $100 to $200 for a document service on top of the court filing fee.

Sources

1. Illinois General Assembly, 750 ILCS 5/401 (Illinois Marriage and Dissolution of Marriage Act, Section 401): Either party must have been a resident of Illinois for 90 days prior to filing for dissolution of marriage.
2. Illinois General Assembly, 750 ILCS 5 (Illinois Marriage and Dissolution of Marriage Act, full chapter): Illinois is a no-fault state using irreconcilable differences as the sole grounds; property is divided equitably; maintenance is calculated by formula under Section 504.
3. Illinois General Assembly, 750 ILCS 5/403 (Jurisdiction, pleadings, and discovery): No judgment of dissolution may be entered until at least 90 days after service of summons or the respondent's appearance.
4. Illinois Courts, Self-Represented Litigants resources: The Illinois Courts website provides standardized IMDMA forms and self-help guidance for pro se litigants in divorce proceedings.
5. Cook County Circuit Court, Clerk of the Circuit Court fee schedule: Cook County filing fee for dissolution of marriage is approximately $338 to $388 depending on whether minor children are involved.
6. Illinois State Bar Association, Lawyer Referral and Information Service: Attorney fees for Illinois divorce cases vary widely; uncontested cases with full representation typically range from $3,000 upward.
7. Illinois General Assembly, 750 ILCS 5/602.10 (Parenting Plan): Illinois requires a Parenting Plan in all cases involving minor children; courts apply a best-interest-of-the-child standard using enumerated factors.
8. Illinois Department of Healthcare and Family Services, Child Support Services: Illinois uses an Income Shares child support model as of 2017; DHFS provides an online child support calculator for computing guideline amounts.
9. U.S. Department of Labor, Employee Benefits Security Administration, QDROs: The Division of Retirement Benefits Through Qualified Domestic Relations Orders: A Qualified Domestic Relations Order (QDRO) is required to divide most employer-sponsored retirement plans in a divorce; it must be submitted to and approved by the plan administrator.
10. Washington State Legislature, RCW 26.09 (Dissolution of Marriage, Divorce, Annulment, and Legal Separation): Washington is a community property state requiring equitable division of marital property; the dissolution statute establishes a 90-day waiting period from filing and no-fault grounds.
11. King County Superior Court, Filing Fees: King County, Washington filing fee for an uncontested dissolution of marriage is approximately $314 as of recent periods.
12. Illinois General Assembly, 750 ILCS 5/503 (Disposition of property and debts): Illinois divides marital property under an equitable distribution standard; property acquired before marriage or by inheritance or gift is generally non-marital.