Legal Separation Versus Divorce in Illinois

 Posted on November 10, 2026 in Family Law

Living apart from your spouse requires decisions about paying bills and caring for your children. You might want court orders addressing those needs without being ready to end the marriage.

Illinois offers legal separation and divorce, but they serve different purposes. Legal separation leaves the marriage intact, while divorce ends it. If you are weighing these options in 2026, our DuPage County, IL divorce attorneys will explain what each process would mean for you.

How Is Legal Separation Different From Divorce in Illinois?

Legal separation provides a way to obtain support and address certain family matters while remaining married. Some spouses choose it because their religious beliefs discourage divorce. Others want time apart before deciding whether to end the relationship.

Divorce allows each person to move forward as unmarried. Once the judgment is entered, either former spouse is free to marry someone else. A legal separation does not provide that freedom.

Neither option guarantees a short or inexpensive case. Disputes over support or children still require resolution, even when both spouses agree to remain married.

Does Living Apart Make You Legally Separated in Illinois?

Moving into separate homes does not create a legal separation. You need to file a court case and obtain a judgment.

Under 750 ILCS 5/402, a spouse living separate and apart from the other spouse has the right to seek reasonable support and maintenance. A private agreement about living expenses is different from a court order that can be enforced.

Can You Receive Spousal Support and Set Parenting Terms During an Illinois Legal Separation?

A legal separation allows the court to award maintenance, also called spousal support or alimony. The judge reviews the spouses’ finances and other factors used to decide whether maintenance is appropriate.

Parents also have ways to obtain orders addressing their children while remaining married. These orders can establish:

• Child support and responsibility for covered expenses
• A parenting-time schedule for each parent
• Authority to make major decisions about the child

These terms should explain what each parent must do. For instance, a schedule needs clear exchange times rather than a promise to arrange visits later. Staying married does not remove the need for workable parenting terms.

Is Property Divided the Same Way in Legal Separation and Divorce in Illinois?

In a divorce, the court identifies marital property and divides it fairly when spouses cannot agree. Legal separation gives the judge a more limited role.

The court cannot value or divide property in a legal separation without the spouses’ agreement. It can approve a property settlement they ask to include in the judgment, unless the agreement is extremely unfair under the legal standard. Once approved, that settlement is final rather than a temporary arrangement.

The judgment also affects later purchases. Under 750 ILCS 5/503, property acquired after a legal separation judgment falls within an exception to marital property. Simply moving out does not create that same protection.

Review existing assets and future financial plans before signing. Do not assume that a later divorce will let you renegotiate an approved property settlement.

Does Legal Separation Preserve Tax or Health Insurance Benefits in Illinois?

Remaining married does not guarantee that every financial benefit continues. Tax rules and health plan terms need separate attention.

The Internal Revenue Service explains that spouses legally separated under a final decree are treated as unmarried for federal filing purposes. They cannot assume they remain eligible to file jointly just because the marriage has not ended.

Health coverage depends on the plan. Legal separation can cause a spouse to lose eligibility, although temporary continuation coverage through COBRA could be available.

Before choosing separation to preserve insurance, ask the plan administrator how a judgment would affect coverage. Obtain the applicable terms and compare the cost of any replacement coverage.

Can You Get Divorced Later After an Illinois Legal Separation?

Either spouse has the right to pursue divorce after a legal separation. The court must still receive a divorce filing and enter a judgment ending the marriage. Separation does not become divorce automatically after a set period.

An earlier property settlement generally remains binding. Maintenance, however, is decided again in the divorce unless the separation agreement contains an enforceable provision for nonmodifiable permanent maintenance.

Give your attorney the separation judgment and all agreements before filing. Those documents determine which issues remain open and which have already been settled.

Contact Our DuPage County, IL Family Law Attorneys

Choosing between separation and divorce starts with understanding what you want the court to resolve. At Mirabella, Kincaid, Frederick & Mirabella, LLC, our attorneys will help you assess the options and seek terms that address your family’s needs.

Contact our Wheaton, IL divorce attorneys or call 630-665-7300 to schedule an initial attorney meeting. At MKFM Law, we serve family law clients from our offices in DuPage, Kane, and DeKalb Counties.