Missouri does not require you to live apart from your spouse before filing for divorce. It is not for six months, it is not a year, it is one night. Every week, petitions are filed across St. Louis County by spouses who still share a house, mortgage, and driveway. In fact, the requirement people trip over is residence.
The Only Waiting Periods Missouri Imposes
Section 452.305 establishes two clocks. One spouse must be a Missouri resident for 90 days prior to the filing of the petition, and service members stationed here qualify. Then, 30 days must pass after filing before a judge can issue a judgment of dissolution.
That is the whole statutory timeline. Ninety days of residence going in, thirty days of court-imposed patience coming out. Neither has anything to do with where you sleep.
Separation Matters Only If Your Spouse Contests the Divorce
Missouri recognizes one ground for divorce: the marriage has been irretrievably broken. When both spouses say so under oath, or one says it and the other doesn’t deny it, the court can make this finding and move forward with the case.
A denial can change everything. If your spouse tells the court that the marriage can be saved, Section 452.320 requires you to prove one of the following:
- Adultery, coupled with the fact that living together has become intolerable.
- Conduct that you cannot reasonably expect to live with.
- Abandonment for at least six continuous months.
- Living apart by mutual agreement for 12 consecutive months before the filing of the petition.
- Living separate and apart for 24 months or more before filing, without mutual agreement. This one is for the most difficult cases.
Two of those five involve separation. That is where the myth comes from. Separation is one way to prove a contested divorce, and not a ticket that you need to obtain to open one.
Moving Out Has Consequences the Statute Never Mentions
Where you live during a divorce is a strategic question, not a legal requirement. It still deserves serious thought.
The arrangement you set up in the first few weeks often becomes the schedule a judge is later asked to make permanent. Leaving the marital home while your children stay behind creates a status quo that favors the other parent. Bills, access to accounts, and responsibility for the mortgage become harder to untangle once someone moves out. In some households, staying is unsafe and safety comes first.
Legal Separation Is a Separate Case, Not a Required Step
Missouri also allows a judgment of legal separation under the same residency and 30-day rules. The court issues orders on property, support, and custody while the marriage legally continues, based on a finding that the marriage is not irreparably broken. Under Section 452.360, either spouse can then ask the court to convert that judgment into a divorce no sooner than 90 days after it is entered.
Some couples choose this route for insurance or religious reasons. No one is required to go through it first.
The 2026 Change Worth Knowing About
Missouri law now states explicitly that pregnancy does not prevent a court from issuing a judgment of divorce or legal separation. This change took effect on August 28, 2026. Judges in this state have long postponed final decisions until after the birth, which has kept some spouses legally married for months longer than they desired. Paternity, custody and child support issues are still sorted out after the child is born. The marriage itself is no longer waiting.
Talk to a Divorce Attorney Before You Decide Where to Live
If you meet the residency requirement, you can file this week. However, whether or not you should file this week, and whether you should remain in your home while the case is ongoing, depends on several factors, including your children, assets, and the likely reaction of your spouse. Mark Harford Law is committed to finding reasonable resolutions where possible, and advocating firmly when necessary, with the best interests of people and children at the heart of their work. If you want to discuss your situation and determine the best course of action, contact Mark Harford Law for a consultation.