What Are the Grounds for Divorce in 2026?

 Posted on April 13, 2026 in Divorce

If you are considering divorce in 2026, understanding the legal grounds — meaning the legal reason you can use to ask a Court to end your marriage — is one of the most important parts of planning your divorce. Illinois divorce law has changed significantly over the past decade, and advice from friends or family members may be based on rules that no longer apply.

Our Palatine divorce attorney has decades of experience and stays up to date on changes to Illinois family law. We are here to help you understand how grounds for divorce work in Illinois and what the filing process would look like for you. To learn more, call us today at 847.873.6741.

What Are the Grounds for Divorce in Illinois in 2026?

Illinois is a no-fault divorce state. That means the only ground for divorce available under the Illinois Marriage and Dissolution of Marriage Act (750 ILCS 5/401) is "irreconcilable differences." Simply put, this means that you and your spouse have disagreements that can’t be fixed. You do not need to prove that your spouse did anything wrong to get a divorce. You only need to show that:

• Irreconcilable differences have caused the irretrievable breakdown of the marriage.
• Efforts at reconciliation have failed.
• Future attempts at reconciliation would not be in the best interests of the spouses or children.

Before 2016, Illinois recognized fault-based grounds for divorce, including adultery, habitual drunkenness, and mental cruelty. Those grounds no longer exist under Illinois law. Then the law changed to remove fault from the divorce process altogether. This was meant to reduce conflict and make divorce less of an unnecessary struggle. When both spouses agree that the marriage is over, there’s no need to dig up evidence and air dirty laundry in Court. The fact that one or both of you wants to end the marriage is enough.

Why Does Illinois Have No-Fault Divorce? 

Even though it may sometimes seem unfair, Illinois Courts do not consider marital misconduct when making decisions in most divorce cases. The no-fault framework works by keeping divorce proceedings focused on practical matters rather than on assigning blame. This particularly benefits minor children, who are negatively impacted by hostile divorce litigation.

However, certain financial misconduct, such as wasteful spending or hidden assets, can still affect the outcome of property division. Of course, if a parent’s behavior toward minor children is dangerous or abusive, that can affect the outcome of child custody proceedings as well.

So a spouse’s behavior during a marriage can still affect a divorce. With no-fault divorce, though, court systems are no longer clogged up with cases of couples trying to prove that one spouse cheated on or abandoned the other. Likewise, spouses in dangerous or abusive marriages no longer have to prove the abusive spouse’s behavior justifies ending the marriage.

How Does the Waiting Period for Divorce Work in Illinois?

One of the most common questions people ask is whether they have to wait before filing for divorce in Illinois. The short answer is no — Illinois does not have a mandatory waiting period to file for or finalize a divorce in 2026.

However, one important exception applies. If your spouse contests the divorce and argues that irreconcilable differences do not exist, a separation period of at least six months is treated as legal proof that the marriage has irretrievably broken down. Once that six-month mark passes, a Judge will accept that the grounds for divorce are satisfied.

If both spouses agree that the marriage is over, the divorce can move forward right away. Disagreements about property, support, or custody are separate issues. These can take time to resolve, but they do not prevent the divorce itself from proceeding.

Does Fault Still Matter for Divorce in Any States? 

Although all 50 states now allow no-fault divorce, people still wonder whether some states allow for a fault-based divorce, especially if one spouse has behaved particularly badly. Many states do still allow fault-based grounds for divorce, and in some of those states, a spouse's misconduct can directly affect the outcome of a divorce.

States That Still Recognize Fault-Based Divorce

Many states still allow spouses to allege fault such as adultery, abandonment, or cruelty when filing for divorce. States close to Illinois that allow for fault-based divorce include Indiana, Ohio, and Missouri. In some of these states, proving fault can influence how a Judge divides marital property or whether one spouse receives alimony.

When Establishing Residency in Another State Might Make Sense

In limited situations, someone might want to consider whether establishing residency in a fault-based state before filing could be a good idea. This might be worth exploring when:

• One spouse's bad behavior would otherwise go unaddressed in the division of property.
• A spouse would qualify for more favorable alimony outcomes under another state's fault-based framework.
• The other spouse has already moved to a state with fault-based divorce.

This is not a decision to take lightly. Establishing residency generally requires actually living in a state for a defined period. Filing in the wrong jurisdiction can create expensive legal problems. Residency requirements vary widely, from as little as six weeks to six months or more. Anyone considering this path should speak with a family law attorney before making any moves, either literal or figurative.

Call a Palatine, Illinois Divorce Lawyer Today

Divorce is one of the most significant changes most people will ever experience. Whether and how you get divorced will depend on where you live, why your marriage is ending, and what outcomes matter most to you.

A skilled Arlington Heights divorce attorney can help you understand your options and make decisions that benefit your family now and well into the future. Call 847.873.6741 today to set up a free initial consultation with The Law Office of Nicholas W. Richardson, P.C.