Divorce in Illinois: The Complete 2026 Guide

Illinois Divorce: Fast Facts

How to File for Divorce in Illinois

Illinois is a no-fault divorce state — the only ground is irreconcilable differences, and you do not need your spouse's consent to file. There is no statutory waiting period, but six months of separation functions as automatic proof that the marriage has broken down irretrievably under Illinois law. Uncontested divorces typically close in 2–6 months; contested cases can take 12–18 months or longer depending on court schedules and the number of disputed issues.

1. Confirm Residency and Venue

   At least one spouse must have lived in Illinois for 90 days before filing. File in the circuit court of the county where you or your spouse currently lives — there is no separate county residency clock. If you recently moved, you can file in any county where either of you now resides, as long as the 90-day Illinois requirement is satisfied.

2. Complete and File Your Petition

   File a Petition for Dissolution of Marriage with the circuit court clerk in the appropriate county. If you have minor children, you must use the version of the Petition that includes child-related provisions. Pay the filing fee ($343–$388+ depending on county) or file an Application for Waiver of Court Fees if you qualify. Illinois Supreme Court-approved forms are available free at illinoiscourts.gov.

3. Serve the Respondent (or Accept a Waiver)

   The Respondent must receive formal notice of the filing. In cooperative cases, the Respondent can sign an Entry of Appearance and Waiver of Service — eliminating the need for a process server entirely. In uncooperative or non-responsive cases, serve by sheriff's deputy or licensed process server. Service by publication is available as a last resort when a spouse's location is unknown after a diligent search.

4. Spouse Files a Response or Entry of Appearance

   After service, the Respondent typically has 30 days to respond. In an uncontested case, the Respondent files an Entry of Appearance (not a formal Response contesting the divorce). If the Respondent does not respond within 30 days, the Petitioner may seek a default judgment after proper notice. A non-responding spouse cannot prevent the divorce — they can only forfeit their opportunity to contest the terms.

5. Exchange Financial Information

   Both spouses must fully disclose their income, assets, debts, and expenses — typically via Financial Affidavits. In contested cases, formal discovery may be required (interrogatories, document requests, depositions). Accurate, timely financial disclosure is the most effective way to control costs and prevent delays. Incomplete or misleading disclosures can expose a party to court sanctions.

6. Negotiate and Sign a Marital Settlement Agreement (MSA)

   Both spouses work to reach agreement on all core issues: property division, allocation of parental responsibilities (formerly "custody"), parenting time, child support, and spousal maintenance. A written Marital Settlement Agreement captures all agreed terms and is incorporated into the final judgment. If cases involve children, an Allocation Judgment of Parental Responsibilities must also be drafted. If direct negotiation stalls, Hello Divorce mediation services can help bridge the gap.

7. Attend the Prove-Up Hearing — Your Final Court Date

   Illinois requires a prove-up hearing to finalize any uncontested divorce. The Petitioner must appear (in person or by video in some counties) and testify under oath, confirming residency, the breakdown of the marriage, and that all agreements were entered voluntarily. The Respondent may also appear but is not required to if they have filed an Entry of Appearance and signed all agreements. The judge reviews the MSA and Allocation Judgment, and if satisfied, signs the Judgment for Dissolution of Marriage. Your divorce is legally final on the date the judge signs.

2025 IMDMA Update — Custody orders mid-case are now final: Under amendments effective January 1, 2025, any parenting plan or allocation judgment entered before the final divorce decree is now a final, immediately enforceable order — not a temporary one. It can be appealed like any other final judgment. However, if the dissolution case itself is later dismissed, the custody order becomes void. Spouses who negotiate and sign parenting arrangements during the pendency of the case should understand these orders carry immediate legal weight.

⚠️ Parenting class requirement — varies by county: Many Illinois counties (including Cook County and Lake County) require both parents to complete a mandatory parenting education class before the final prove-up hearing when minor children are involved. Lake County, for example, requires completion of the Lake County Family Parenting Program. Failure to complete the required class can delay your final hearing. Check your county circuit court's local rules before scheduling your prove-up. See the Illinois divorce process guide for county-specific resources.

Illinois Divorce Laws: Grounds, Residency, and the 6-Month Separation Rule

Illinois became a pure no-fault state in 2016 when the Illinois Marriage and Dissolution of Marriage Act (IMDMA) was amended to eliminate all fault-based grounds for divorce. Irreconcilable differences is the sole ground — meaning the marriage has broken down irretrievably, reconciliation has failed or is not in the family's best interests, and future efforts to reconcile would not serve those interests. You do not need your spouse's agreement, cooperation, or consent to obtain a divorce in Illinois.

Illinois Has No Waiting Period — But the 6-Month Separation Rule Matters

This is one of the most misunderstood aspects of Illinois divorce law. Illinois does not have a mandatory waiting period between filing and finalizing your divorce. The calendar is driven entirely by how quickly both spouses reach agreement and how backlogged your local court is.

For the complete IMDMA statute, see 750 ILCS 5 — Illinois Marriage and Dissolution of Marriage Act. For court self-help resources, visit illinoiscourts.gov/self-help/divorce.

Property Division in Illinois: Equitable Distribution

Illinois divides marital property under the equitable distribution standard — meaning marital assets and debts are divided fairly, but not necessarily equally. Unlike community property states where a 50/50 split is the default, Illinois courts weigh a set of statutory factors to reach a result that reflects each spouse's actual circumstances. Fault and marital misconduct are explicitly excluded from the property division analysis in Illinois.

Factors Illinois courts weigh when dividing marital property:

• Each spouse's contribution to the acquisition, preservation, or increase in value of marital and non-marital property — including contributions as a homemaker
• Each spouse's economic circumstances at the time of division — including the desirability of awarding the family home to the parent with primary residential care of children
• The duration of the marriage — long marriages typically produce more balanced distributions; short marriages with clear separate property may produce more asymmetric outcomes
• Tax consequences to each party from the proposed division — courts consider the after-tax value of assets, not just face value
• Any obligations and rights arising from prior marriages, including maintenance or child support orders from prior relationships
• Whether the proposed division was reached as part of a written Marital Settlement Agreement — courts generally enforce written agreements entered voluntarily and without coercion

Illinois is NOT a 50/50 state — but that doesn't mean unequal outcomes are automatic: Equitable distribution is often misunderstood. In most Illinois divorces, the outcome ends up reasonably close to equal — but the court has the authority to deviate based on the factors above. Spouses who negotiate their own Marital Settlement Agreement have full flexibility to divide property however they agree, and Illinois courts will generally approve any fair, voluntarily reached agreement. For complex assets or business interests, a Certified Divorce Financial Analyst can help you model division scenarios and understand tax implications.

Use our settlement agreement checklist and property division spreadsheet to inventory your marital estate. For retirement accounts, see our QDRO guide. For the marital home, use our home equity split calculator.

Spousal Maintenance in Illinois

Illinois calls it "spousal maintenance" — not alimony — and it is not automatic. Courts award maintenance only when there is genuine financial need and the other spouse has the ability to pay. When the guideline formula applies, the amount is 33.3% of the payor's net income minus 25% of the payee's net income, capped so the payee receives no more than 40% of the couple's combined net income. Duration is set by a statutory multiplier tied to marriage length. Fault and marital misconduct are expressly excluded from both the eligibility and amount analysis.

Illinois Spousal Maintenance Formula

The guideline formula applies when combined gross annual income is $500,000 or less and neither party has an existing maintenance or child support obligation from a prior relationship.

Key factors courts consider for maintenance:

• The income and property of each party, including marital property allocated and non-marital property assigned at divorce
• Any impairment of present or future earning capacity resulting from devoting time to domestic duties, or forgoing education or employment during the marriage
• The realistic present and future earning capacity of each party
• Duration of the marriage and the standard of living established during the marriage
• Each party's age, health, and employability — including documented disabilities affecting earning capacity

2025 IMDMA update — maintenance now accrues during incarceration: Effective January 1, 2025, Illinois removed the prior rule that no maintenance could accrue while a party was imprisoned. Arrears can now accumulate during incarceration, including when a spouse is jailed for contempt of a court order. Additionally, courts must now conduct an evidentiary hearing (or obtain party agreement) before imputing income to an unemployed or underemployed spouse — the court must also make specific written findings identifying the basis for imputation.

Maintenance ends automatically in Illinois when: (1) the recipient remarries; (2) either party dies; or (3) the recipient begins cohabiting with a new partner on a continuing, conjugal basis. Cohabitation is frequently litigated — the paying spouse bears the burden of proving it.

For an estimate of support amounts, see our alimony calculator guide. For cases with significant income disparity, a Certified Divorce Financial Analyst can help you model maintenance scenarios before negotiating your MSA.

Allocation of Parental Responsibilities and Child Support in Illinois

Illinois does not use the terms "custody" or "visitation." The 2016 IMDMA reform replaced them with allocation of parental responsibilities (decision-making authority) and parenting time (physical schedule). Every divorce involving minor children requires a written Parenting Plan incorporated into the final Allocation Judgment. Child support is calculated under Illinois's Income Shares model, using both parents' net incomes and the number of overnights each parent has with the child.

Key factors Illinois courts weigh under the best interests standard:

• The wishes of the child, given their age and maturity — courts give increasing weight to the child's preference as they get older
• Each parent's willingness and ability to facilitate and support the child's ongoing relationship with the other parent
• Prior caretaking arrangements and each parent's level of involvement in the child's daily life before the separation
• Any history of domestic violence or abuse by either parent against the child or the other parent
• The child's adjustment to their current home, school, and community — stability in existing relationships and environment is a significant factor

Illinois child support — Income Shares model explained: Illinois switched from a flat percentage model to the Income Shares model in 2017. Both parents' net incomes are combined to estimate what the family would have spent on the child in an intact household. That obligation is then prorated by each parent's income share. The parenting time percentage further adjusts the amount — at 146+ overnights (40%), the shared-parenting multiplier (1.5×) applies before crediting each parent's direct spending. The guideline amount creates a rebuttable presumption; courts may deviate only with written findings. The HFS schedule of basic child support obligations is updated annually — most recently March 5, 2025.

2025 relocation rule update: A parent with significant parenting time who wants to relocate must give 60 days' written notice. The distance threshold requiring consent or court approval is 25 miles in Cook County and the five adjacent counties (DuPage, Kane, Lake, McHenry, Will) — and 50 miles in all other Illinois counties. As of the 2025 IMDMA amendments, distance is now measured by online mapping service using the shortest available route — the "as the crow flies" argument no longer applies.

For a full guide to child support calculations, visit our how to file for child support in Illinois guide. For parenting plan guidance, see our joint custody guide. For custody disputes, Hello Divorce mediation services can help you reach a parenting plan without litigation.

How Much Does a Divorce Cost in Illinois?

A straightforward uncontested Illinois divorce can cost as little as $343–$388 in court fees plus document preparation. A fully contested divorce going to trial can cost $10,000–$50,000 or more per spouse. Because Illinois has no statutory waiting period, even a simple case carries calendar delay — driven by court scheduling, not law. The single biggest cost driver is disagreement: every disputed issue that requires a judge's decision adds attorney hours and court time.

Additional Illinois-specific costs to budget for:

• Respondent's appearance fee — $218–$251 in Cook County; paid separately when the Respondent files their Entry of Appearance; this is in addition to the Petitioner's filing fee
• Process server or sheriff service — $40–$100 for standard sheriff service in Cook County; higher for private servers; eliminated entirely when the Respondent signs an Entry of Appearance and Waiver of Service
• QILDRO / QDRO drafting — $500–$1,500 per plan; Illinois public employees (IMRF, TRS, SERS) require a Qualified Illinois Domestic Relations Order (QILDRO), which must be reviewed and approved by the plan administrator; see our QDRO guide
• Mandatory parenting education class — required in most Illinois counties when minor children are involved before the final prove-up; typically $25–$75 per parent; fee waived if the court grants an overall fee waiver
• Certified copies of the judgment — $1–$10 per page depending on county; obtain at least 3–5 certified copies for name change, beneficiary updates, mortgage refinancing, and employer HR records

For a full breakdown, see our guide: Cost of Divorce in Illinois. If cost is a concern, read our guide on how to get divorced with little or no money. Compare Hello Divorce plans →

Uncontested vs. Contested Divorce — Illinois's Three Filing Paths

Illinois offers three distinct paths. The Joint Simplified Dissolution is the most streamlined but has strict eligibility requirements. A standard uncontested divorce is available to any couple who has reached full agreement on all issues. A contested divorce is the path when spouses cannot agree and need the court to resolve disputes. All three paths require a prove-up hearing in which the Petitioner must appear and testify before a judge to finalize the divorce.

Joint Simplified Dissolution — verify all conditions before filing: Every eligibility requirement must be met simultaneously at the time of filing. A single disqualifying factor — a minor child, any real estate, combined income over $60,000 — requires the standard process instead. Filing under the simplified procedure when ineligible will result in a dismissed petition and a lost filing fee. If you're unsure, consult a Hello Divorce attorney before filing.

Not sure which path applies? Read our full comparison: Contested vs. Uncontested Divorce and our guide to uncontested divorce in Illinois.

If you're close to agreement but stuck on specific issues, Hello Divorce mediation services can bridge the gap at a fraction of litigation costs. Mediation is especially effective for property division disputes, parenting plans, and maintenance disagreements.

Legal Separation vs. Divorce in Illinois

Illinois recognizes legal separation as a formal court status. A legal separation follows a process nearly identical to divorce — the same forms, financial disclosures, and court judgment — but at the end, you remain legally married. Unlike divorce, legal separation does not require the six-month separation period that establishes automatic proof of irreconcilable differences. Either spouse may convert the separation to a divorce at any time after a separation order has been entered.

To understand your options before filing, read our guide: Legal Separation vs. Divorce in Illinois. For settlement agreement guidance, see our settlement agreement checklist.

Illinois Divorce Forms and Paperwork

Illinois uses standardized statewide forms approved by the Illinois Supreme Court, available free at illinoiscourts.gov. Some counties have additional local cover sheets or checklists, but the core forms are consistent statewide. Below are the primary forms for both the standard divorce path and the Joint Simplified Dissolution.

All official Illinois divorce forms are free at the Illinois Supreme Court Approved Forms library and your county's circuit court clerk self-help center. Hello Divorce guides you through every required form accurately — see our divorce forms assistance or view all plans.

Changing Your Name After Divorce in Illinois

In Illinois, you can request a name restoration directly in your Petition for Dissolution of Marriage at the time of filing — at no additional cost. The judge will include the name change in your final Judgment for Dissolution of Marriage. Once you have your certified Judgment, follow this sequence to update all records.

1. Social Security Administration — Update your SSA record first using your certified Judgment and photo ID. Visit your local SSA office, submit Form SS-5 by mail, or use ssa.gov for eligible online updates. You need an updated SSA card before the Illinois Secretary of State will update your driver's license.
2. Illinois Secretary of State (Driver's License / State ID) — Visit a Secretary of State facility with your updated SSA card, certified Judgment, and proof of Illinois residency. Find locations at ilsos.gov.
3. U.S. Passport — DS-5504 if issued less than 1 year ago (no fee); DS-82 if more than 1 year ago (fee required); DS-11 for first-time application or passport more than 15 years old. Submit with your certified Judgment.
4. Financial accounts, employer HR, and insurance — Contact each institution individually with a certified copy of your Judgment. Order at least 3–5 certified copies from the circuit court clerk — fees vary by county but are typically $1–$10 per page.

For a complete post-divorce name change checklist, see our guide: How to Change Your Name After Divorce. For Illinois-specific questions, visit our knowledge base.

Frequently Asked Questions: Divorce in Illinois

How long does a divorce take in Illinois?

Illinois has no statutory waiting period — there is no legally mandated minimum time between filing and finalization. An uncontested divorce where both spouses agree on all terms typically concludes in 2–6 months. A contested divorce typically takes 12–18 months or longer depending on disputes and local court backlogs. The fastest path is a Joint Simplified Dissolution for qualifying couples, which can close in as little as 2–3 months with complete paperwork. See our guide: Illinois Divorce Timeline Explained.

Does Illinois have a waiting period to get divorced?

No — Illinois does not have a mandatory waiting period. However, Illinois law provides that six months of living separately creates a conclusive legal presumption that the marriage has irretrievably broken down — meaning you do not need to independently prove irreconcilable differences if you have been separated that long. You can still obtain a divorce before the six-month mark if you can otherwise demonstrate the breakdown. Separation does not require living in different homes — spouses can be legally separated while living under the same roof, provided they are living as separate households.

Is Illinois a 50/50 divorce state?

No. Illinois is an equitable distribution state — marital property is divided fairly, but not necessarily equally, based on a set of statutory factors. Courts consider each spouse's economic circumstances, contributions to the marriage, the duration of the marriage, tax consequences, and the needs of any children. A roughly equal outcome is common in many Illinois divorces, but it is not the automatic default, and courts have discretion to deviate. Fault and marital misconduct are explicitly excluded from the property division analysis. Spouses who negotiate their own MSA can divide property however they mutually agree. Use our property division spreadsheet to inventory your marital estate.

Does Illinois require a reason to get divorced?

No. Illinois has been a pure no-fault divorce state since 2016 when the IMDMA eliminated all fault-based grounds. Citing irreconcilable differences is sufficient — no proof of wrongdoing required. You do not need your spouse's consent or cooperation to obtain a divorce. If your spouse objects to the divorce entirely, you can still proceed — the court will grant the dissolution. Fault and marital misconduct cannot be used to gain a larger share of property, deny maintenance, or affect custody outcomes. Read more: No-Fault Divorce in Illinois.

What happens to the house in an Illinois divorce?

If the home was purchased during the marriage, it is marital property subject to Illinois's equitable distribution rules. Common resolutions include a buyout (one spouse pays the other's equity share), selling the home and dividing proceeds equitably, or a deferred sale where one spouse — often the parent with primary parenting time — remains in the home until a future trigger event. If the home was purchased before marriage or funded with non-marital assets, the non-marital portion may be traced and excluded from division. Unlike community property states, Illinois does not default to a 50/50 split. Use our home equity split calculator and read our guide on what to do with the marital home.

Can I get divorced in Illinois without a lawyer?

Yes. Many Illinois residents complete uncontested divorces without an attorney using free Illinois Supreme Court-approved forms from illinoiscourts.gov. Online services like Hello Divorce provide guided form preparation, a completed MSA, and access to attorneys by the hour when legal advice is needed — without a full retainer. The Joint Simplified Dissolution is particularly well-suited to self-represented parties who qualify. Even in a standard uncontested divorce, if the Respondent signs an Entry of Appearance and Waiver of Service, the process is straightforward. See our guide: How to DIY Your Illinois Divorce.

What is the prove-up hearing and do I have to go to court?

Yes — Illinois requires a prove-up hearing to finalize any uncontested divorce. The Petitioner must appear (in person or by video in some counties) and testify under oath, confirming Illinois residency, the breakdown of the marriage due to irreconcilable differences, and that all agreements were entered voluntarily. The Respondent may also appear but is not required to, provided they have filed an Entry of Appearance and signed all agreements. The hearing is typically brief — 5 to 30 minutes. Some counties require both parties to appear; always check your local court rules. The judge signs the Judgment for Dissolution of Marriage at the conclusion of a successful prove-up, and your divorce is final on that date.

How does Illinois calculate spousal maintenance (alimony)?

Illinois uses a statutory formula when combined gross income is $500,000 or less: maintenance equals 33.3% of the payor's net income minus 25% of the payee's net income, capped so the payee receives no more than 40% of combined net income. Duration is calculated by multiplying the years married by a statutory factor — from 0.20 for marriages under 5 years, up to maintenance equal to the marriage length (or indefinite) for marriages of 20 or more years. A 10-year marriage, for example, produces a 0.44 multiplier — approximately 52–53 months of maintenance. Maintenance is not automatic: courts first assess need and ability to pay across 14 statutory factors. Either party may seek modification upon a substantial change in circumstances such as retirement, job loss, or the recipient's remarriage or cohabitation.