After a divorce, life circumstances can change. A person receiving spousal maintenance may begin a new relationship, spend more time with a partner, or eventually move in with someone new. These changes can raise important legal questions: Can living with a new partner affect spousal maintenance in Illinois? Could an ex-spouse seek to end maintenance payments because of a new relationship?

Under Illinois law, living with a new partner can affect spousal maintenance, but dating someone or sharing a home does not automatically mean maintenance will end. The law focuses on whether the recipient is cohabiting with another person on a “resident, continuing conjugal basis,” subject to any applicable written agreement or court-approved terms.

Understanding how this rule works can help both the person paying maintenance and the person receiving it make informed decisions about their legal rights and responsibilities.

What Is Spousal Maintenance in Illinois?

Spousal maintenance, sometimes called alimony, is financial support that one former spouse may be ordered to pay to the other after a divorce.

Depending on the circumstances, a maintenance award may help address differences in income, earning capacity, financial resources, or other factors considered by the court. The terms of an award can vary from one divorce case to another.

A maintenance order or marital settlement agreement may also address when payments end, whether the award can be modified, and what happens if either former spouse’s circumstances change.

Because these terms matter, it is important to review the actual divorce judgment and any applicable agreement before assuming that a new relationship changes a maintenance obligation.

What Does Illinois Law Say About Living With a New Partner?

Section 510(c) of the Illinois Marriage and Dissolution of Marriage Act generally provides that future spousal maintenance terminates if the person receiving it cohabits with another person on a resident, continuing conjugal basis, unless the parties have agreed otherwise in a qualifying written agreement or the court has otherwise approved.

This standard means that a new romantic relationship does not necessarily end maintenance. The circumstances of the relationship matter, including whether it resembles an ongoing, marriage-like partnership rather than a dating relationship alone.

Courts examine the evidence as a whole. There is no single fact that automatically determines whether a relationship meets the legal standard.

Does Dating Someone Affect Spousal Maintenance?

Dating, being in a committed relationship, or spending time with a new partner does not automatically terminate spousal maintenance under Illinois law.

For example, a person may have a romantic partner but continue to maintain a separate home and keep their finances and day-to-day responsibilities independent. Those facts may be relevant when determining whether the relationship meets the statutory standard.

However, courts look beyond labels. Calling someone a boyfriend or girlfriend does not resolve the legal question if the evidence suggests that the relationship functions like a marriage.

The key issue is whether the recipient’s relationship with the new partner meets the applicable legal standard, not simply whether the person has started dating again.

What Factors Do Illinois Courts Consider?

When deciding whether a relationship qualifies as cohabitation on a resident, continuing conjugal basis, Illinois courts may consider several aspects of the couple’s life together.

These factors can include:

• Length of the relationship: How long the relationship has existed.
• Time spent together: How frequently the couple sees one another and whether they regularly live together.
• Shared activities: Whether they engage in everyday activities as a couple.
• Financial and personal arrangements: Whether their financial affairs, household responsibilities, or other personal matters are interconnected.
• Travel and holidays: Whether they take vacations together or regularly spend holidays as a couple.
• The overall nature of the relationship: Whether the evidence indicates a continuing, marriage-like partnership.

These are examples, not a rigid checklist. Courts may weigh the evidence differently depending on the circumstances of each case. Illinois appellate decisions have identified these and other considerations when evaluating alleged cohabitation.

Does the Couple Have to Live Together for Spousal Maintenance to End?

Living arrangements are an important part of determining whether a new relationship may affect spousal maintenance in Illinois. Under Section 510(c) of the Illinois Marriage and Dissolution of Marriage Act, the relationship must meet the applicable standard for cohabitation on a resident, continuing conjugal basis.

In In re Marriage of Culm (2025), an Illinois appellate court affirmed the denial of a request to terminate maintenance where the couple had a long-term relationship, spent nights together, and traveled together but maintained separate residences and had never lived together or planned to do so.

This decision illustrates why dating, frequent overnight visits, or a long-term romantic relationship does not automatically establish qualifying cohabitation. Courts evaluate the specific evidence and the nature of the relationship under Illinois law.

Because the outcome depends on the facts and applicable legal standards, anyone concerned about a new partner's effect on spousal maintenance should seek advice about their particular circumstances.

What Happens to Spousal Maintenance if Cohabitation Is Established?

Under Section 510(c), the obligation to pay future maintenance generally terminates when the recipient begins qualifying cohabitation, unless an applicable written agreement or court-approved arrangement provides otherwise. The statute also addresses the effective date of termination and potential reimbursement of maintenance paid from that date.

Disputes can arise when former spouses disagree about whether the relationship qualifies or when the cohabitation began. In those circumstances, evidence and the terms of the existing divorce judgment or agreement can become especially important.

Because the financial consequences can be significant, a person should not assume that an allegation alone establishes that maintenance has ended. Legal guidance can help clarify how the statute and the applicable court documents affect the situation.

Who Has to Prove That a Former Spouse Is Cohabiting?

Generally, the party seeking termination of spousal maintenance based on alleged cohabitation must present evidence supporting that claim. Illinois case law describes the required showing as evidence of a de facto marriage-like relationship. The precise evidentiary analysis depends on the case and the applicable precedent.

Evidence may include information about living arrangements, shared household expenses, financial connections, travel, or other aspects of the couple’s life together. Any evidence should be gathered and handled lawfully.

A court evaluates the evidence rather than relying solely on suspicion, assumptions, or the existence of a new romantic relationship.

Can Spousal Maintenance Be Modified for Other Reasons?

Yes. Apart from the specific cohabitation rule, Illinois law allows certain maintenance orders to be modified when the applicable legal requirements are met. Section 510 addresses modification and termination, while the terms of the divorce judgment or settlement agreement may affect what changes are permitted.

A change in income, employment, financial circumstances, or other relevant conditions may raise a separate question about modification. Whether a modification is available depends on the governing order, any agreement between the parties, and the facts of the case.

Termination based on qualifying cohabitation and modification based on changed circumstances are distinct legal issues. It is important to understand which rule applies before taking action.

What Should You Do if a New Relationship May Affect Maintenance?

Whether you pay or receive spousal maintenance, consider taking the following steps if a new relationship raises questions about an existing order.

1. Review the divorce judgment and agreement. Check the provisions governing maintenance, termination, and modification.
2. Keep relevant records. Financial documents and other lawful evidence may help clarify the circumstances.
3. Avoid making assumptions. Dating, staying overnight, and qualifying cohabitation are not necessarily the same thing under Illinois law.
4. Get legal advice before changing payments. Stopping or withholding payments without understanding the applicable order and law can create additional disputes.
5. Address disagreements through the appropriate legal process. If the parties dispute whether maintenance should end, legal guidance can help identify the available options.

The right next step depends on the facts and the language of the applicable court order or agreement.

How Can a Family Law Attorney Help?

Questions about spousal maintenance and a former spouse’s new relationship can involve complicated factual and legal issues. A family law attorney can review the divorce judgment, explain the applicable Illinois law, assess relevant evidence, and help you understand your options.

Whether you are concerned that a new partner may affect the maintenance you receive or believe that payments should end because of qualifying cohabitation, getting advice tailored to your circumstances can help you make informed decisions.

Speak With Weiss Ortiz Attorneys & Mediators

If you have questions about spousal maintenance, cohabitation, or a possible change to an existing divorce order, Weiss Ortiz Attorneys & Mediators can help you understand your options under Illinois law.

Our firm serves Cook County, Illinois, including Chicago, La Grange Park, Oak Brook, and Deerfield. Contact our team to discuss your family law concerns and learn what steps may be available for your situation.

Free consultations: 773-498-4498
Website: weissortizlaw.com

Disclaimer: This article is for informational purposes only and is not legal advice. Reading this article does not create an attorney-client relationship. The outcome of any legal matter depends on its specific facts and applicable law.