Is Missouri a No-Fault Divorce State? Here’s What It Really Means

Yes. Missouri is a no-fault divorce state, but that label misleads many people. You cannot win a divorce by proving that your spouse has cheated, and yet their misconduct can still affect what you get out of the situation. Here is what “no-fault” actually means under Missouri law in 2026.

The Only Ground for Divorce Is a Broken Marriage

Missouri recognizes exactly one legal ground for ending a marriage: that it is “irretrievably broken.” Under RSMo § 452.305, a court grants dissolution once it finds there is no reasonable likelihood that the marriage can be preserved.

You do not allege adultery. You do not prove cruelty or abandonment. You state that the marriage is over, and this becomes the basis for the decision. Missouri even refers to the case as a “dissolution of marriage” rather than a divorce. The same outcome, different names.

No-Fault Doesn’t Mean Automatic

Here is a common misconception: people assume that no-fault divorce is guaranteed. It is not. Under RSMo § 452.320, if one spouse denies, under oath, that the marriage is irreparably broken, the court must dig deeper.

The judge then considers the circumstances and the likelihood of reconciliation. The court may pause the case for anywhere from 30 days to six months and recommend counseling, but it cannot require counseling on anyone. To proceed over an objection, the petitioner must prove one of the following facts listed in the statute:

• The other spouse committed adultery, and the petitioner finds it unbearable to continue living together.
• The other spouse behaved in such a way that the petitioner could not reasonably be expected to remain.
• Abandonment for at least six months, or living apart by mutual agreement for 12 months – or 24 months apart, whether or not both parties agreed.

Most cases never reach the fight. The option still exists, and that’s why courts sometimes call Missouri a “modified” no-fault state.

Fault Still Matters – Just Not for the Grounds

This is the part that catches people off guard. Missouri ignores faults when deciding whether to grant a divorce. It doesn’t ignore faults anywhere else.

Marital misconduct can have two costly consequences:

• Maintenance, formerly known as alimony. Under RSMo § 452.335, a judge may consider a spouse’s conduct during marriage when deciding on support payments and their amount.
• Property division. RSMo § 452.330 allows the court to take into account each spouse’s behavior when dividing marital assets. Missouri follows an equitable distribution approach, which means “fair” rather than automatic 50/50.

So, an affair will not prevent your divorce. It can still affect the money.

The Rules That Actually Slow You Down

No-fault divorce removes the need for a fault fight, but it doesn’t remove all requirements.

• One spouse must have resided in Missouri for at least 90 days prior to filing a divorce petition.
• There is a waiting period of at least 30 days between the filing of the petition and the court’s finalization of the divorce, so even fully agreed cases can take about a month to complete.
• The court must still settle matters such as custody, child support, and asset division before signing the final decree.

What Changed for 2026

Missouri just dropped one long-standing barrier. A new law taking effect August 28, 2026 allows courts to finalize a divorce while a spouse is pregnant, something that the state previously refused to do. Custody and support for a child born after the divorce are decided in a later proceeding, once paternity and the child’s needs are clear. For someone trying to leave an abusive marriage, this means that the marriage no longer needs to stay legally intact until the baby is born.

Get Clear Answers

“No-fault” sounds simple. But what it means for custody, support, and property ownership is not so simple. Whether your spouse’s behavior helps you or harms you depends on details that a Missouri attorney can spot in minutes.

Columbia Family Law Group has been guiding Missouri families through divorce for over 35 years. Contact our team to find out how Missouri’s no-fault divorce rules apply to your situation and what your next step should be.