Defining the Two Illinois Divorce Tracks
What is the difference between contested and uncontested divorce in Illinois?
In Illinois, an uncontested divorce (resolving in 1–4 months) occurs when both spouses execute a Marital Settlement Agreement and Parenting Plan on all issues before filing. A contested divorce (averaging 18–36 months in Cook County) requires a Circuit Court judge to issue binding rulings under the Illinois Marriage and Dissolution of Marriage Act (750 ILCS 5/). While uncontested divorces cost $1,500–$5,000 in combined legal fees, contested litigation often costs $15,000–$50,000+ per spouse due to mandatory discovery under IL Supreme Court Rule 201 and trial preparation.
Uncontested Divorce in Illinois: Full Framework
How the Illinois Uncontested Divorce Process Works
An uncontested Illinois divorce initiates when both spouses—either jointly or through separate attorneys—complete and execute a Marital Settlement Agreement (MSA) and a Parenting Plan (for cases involving minor children). The Marital Settlement Agreement and Parenting Plan must both satisfy the substantive standards of 750 ILCS 5/ before an Illinois Circuit Court judge will approve them.
The completed MSA and Parenting Plan are filed with the Circuit Court Clerk alongside the Petition for Dissolution of Marriage, Financial Affidavit, and applicable county filing fees. As of 2026, Cook County filing fees are $337, while other Illinois counties range from $200 to $400. In a fully uncontested case, the court may finalize the divorce at a brief prove-up hearing lasting 15 to 30 minutes.
Measurable Advantages of Illinois Uncontested Divorce
- Cost: Legal fees typically range from $1,500 to $5,000 total, compared to $30,000+ in contested litigation.
- Timeline: Most cases finalize in 1 to 4 months.
- Client Control: Spouses—not a judge—determine the division of assets. This allows for custom arrangements, such as non-statutory property offsets, that a judge cannot order under a standard trial.
- Privacy: Sensitive financial details can be incorporated by reference, keeping them out of the publicly accessible court file and away from business partners or the public.
- Compliance: According to the Association for Conflict Resolution, self-negotiated terms result in significantly higher post-decree compliance than court-ordered terms.
When Uncontested Divorce Is Not Appropriate
An uncontested track is contraindicated if there is asset concealment, a history of domestic violence (1-877-863-6338), or a severe financial sophistication imbalance. Under 750 ILCS 5/502(b), an executed Marital Settlement Agreement is presumptively binding and can only be challenged later upon proof of fraud or duress.
Contested Divorce in Illinois: Full Framework
How the Illinois Contested Divorce Process Works
A contested Illinois divorce initiates when one spouse files a Petition for Dissolution of Marriage and the parties fail to reach a complete agreement. The Illinois Circuit Court then schedules a Case Management Conference within 30 to 60 days.
Contested cases proceed through five litigation phases under the Illinois Supreme Court Rules:
- Mandatory Financial Discovery: Spouses exchange sworn disclosures under IL Supreme Court Rule 201, including tax returns and bank statements.
- Temporary Orders: Petitions for interim support or parenting time under 750 ILCS 5/501.
- Mediation: Required in Cook, DuPage, Lake, and Kane Counties before a trial date is set.
- Pre-Trial Conferences: Judicial meetings to narrow contested issues.
- Bench Trial: A judge issues binding rulings on property (750 ILCS 5/503), maintenance (750 ILCS 5/504), and child custody (750 ILCS 5/602.7).
When Contested Litigation Is the Necessary Choice
- Domestic Violence: The court can enter an Emergency Order of Protection within 24 hours under the Illinois Domestic Violence Act (750 ILCS 60/).
- Asset Concealment: Litigation provides the only way to compel disclosure via forensic accounting subpoenas and sanctions under IL Supreme Court Rule 219.
- Custody Disputes: When parents disagree, the judge applies the 17-factor “best interests” standard and may appoint a Guardian ad Litem.
Measurable Costs of Illinois Contested Divorce
In Cook County, contested litigation costs each spouse $15,000 to $50,000+ for moderate cases and $75,000 to $150,000+ for high-complexity cases. Additional costs include forensic accountants ($5,000–$25,000) and custody evaluators ($3,000–$10,000).
Comparison of Illinois Divorce Tracks
| Factor | Uncontested Divorce | Contested Divorce |
| Combined Legal Cost | $1,500–$5,000 | $30,000–$100,000+ |
| Timeline | 1–4 months | 18–36 months |
| Decision Authority | Both Spouses | Assigned Circuit Court Judge |
| Financial Disclosure | Voluntary | Court-Compelled (Rule 201) |
| Privacy Protection | High (Limited Public Filing) | Low (Detailed Court Record) |
Frequently Asked Questions
How long does an uncontested divorce take in Illinois?
Cases without minor children finalize in 1 to 3 months. Cases with children require a Parenting Plan review and take 2 to 4 months.
Can a contested Illinois divorce become uncontested?
Yes. A contested case converts to uncontested the moment both spouses execute a Marital Settlement Agreement and Parenting Plan. Most Illinois cases settle after the Discovery Phase provides full financial transparency.
Anna P. Krolikowska, an attorney in the Northbrook law firm of Anna P. Krolikowska P.C, focuses her practice in the area of family law. Anna realizes that importance and the impact family law matters have not only on her clients, but also on their families. From divorce and child custody to any judgment modifications, Anna considers the unique circumstances of each case to develop a course of action designed specifically to address each client’s unique needs.