How Long Do You Have to Be Separated for Divorce in Missouri?

Missouri does not set a minimum separation period before you can file for divorce. If you and your spouse agree the marriage is over, you can file the day you decide, provided one of you has lived in Missouri for at least 90 days. The separation clock only turns into a real waiting period if your spouse contests the divorce and you have to fall back on proving 12 or 24 months of living apart. So the honest answer to how long you have to be separated for divorce in Missouri is: usually zero, sometimes up to two years, depending entirely on whether your spouse fights it.¹

No Required Separation for an Uncontested Divorce

Missouri is a no-fault state. The only ground for dissolution is that the marriage is “irretrievably broken,” meaning there’s no reasonable likelihood it can be preserved.² You don’t have to prove wrongdoing. You don’t have to move out first. You don’t have to wait.

The petition does have to state the date you and your spouse separated, but the statute does not require that date to be any specific distance in the past.³ If both spouses agree the marriage is irretrievably broken, or if one says so and the other does not deny it under oath, the court can accept that finding and move forward.¹ That is the path most Missouri divorces take, and it involves no separation requirement whatsoever.

When Separation Time Becomes Required

The situation shifts if your spouse denies under oath that the marriage is irretrievably broken. At that point, the court cannot simply take your word for it. You have to prove at least one of five specific grounds:¹

Your spouse committed adultery and you find it intolerable to live with them.
Your spouse has behaved in a way that makes it unreasonable to expect you to keep living with them.
Your spouse abandoned you for at least six continuous months before you filed.
You and your spouse agreed to live apart and have done so continuously for 12 months before filing.
You have lived apart continuously for at least 24 months before filing, whether or not your spouse agreed to the arrangement.

The last two grounds are where separation length actually matters. If you can’t prove adultery, unreasonable behavior, or six months of abandonment, your fallback is time apart. With your spouse’s consent to live separately, 12 months does the job. Without that consent, you need a full 24 months. Those are the longest waits a Missouri divorce can require, and they only apply in contested cases.

If the court is not persuaded the marriage is irretrievably broken on any of the five grounds, it can continue the case for anywhere from 30 days to six months and suggest counseling, though attendance cannot be forced.¹

What Living Separate and Apart Actually Means

Missouri’s statute uses the phrase “lived separate and apart” without defining it in detail. In practice it means ending the marital relationship: separate bedrooms, finances no longer merged as a couple, and daily life run as though the marriage is over. Many couples do this by moving into different homes, but courts have recognized separations under the same roof when the spouses genuinely live independent lives.

Continuity is what the statute is strict about. The separation must be continuous for the entire 12 or 24 months. A reconciliation attempt that puts you back together as a couple can reset the clock, so if you’re relying on separation time to prove your case, treat the break as final and keep it that way.

The Other Timing Rules That Do Apply

Two waiting periods apply to every Missouri divorce, regardless of whether the case is contested, and they are the deadlines most people confuse with a separation requirement.

The 90-Day Residency Requirement

Before a Missouri court can grant a divorce, at least one spouse must have been a resident of Missouri, or a service member stationed here, for 90 days immediately before the petition is filed.² If you recently moved to the state, you’ll wait until you hit that mark before you can file. The petition goes in the circuit court of the county where either spouse lives.³

The 30-Day Waiting Period After Filing

Even when both spouses agree on everything, no Missouri divorce can be finalized until 30 days have passed since the petition was filed.² That is the statutory floor. Most divorces run longer because of scheduling, discovery, and negotiations over property and children, and contested cases can stretch well past a year. The 30-day clock starts on the filing date, not on the date your spouse is served, and it does not require the spouses to live apart during that month.

Legal Separation Is a Separate Option, Not a Prerequisite

Missouri also offers legal separation, which lets a court issue orders on property, custody, and support without ending the marriage. It carries the same 90-day residency and 30-day waiting rules as a divorce.² The key point for anyone worried about a separation requirement: you do not have to get a legal separation before filing for divorce. It is an alternative path, not a step on the way. If you already have a legal separation and want to convert it to a full dissolution, the earliest you can ask is 90 days after the separation judgment was entered.⁴

The Short Version

If your spouse will not contest the divorce, no separation period applies at all. You need 90 days of Missouri residency to file, and 30 days between filing and judgment. If your spouse contests and you cannot prove adultery, unreasonable behavior, or six months of abandonment, then separation time steps in as the ground you’re proving: 12 months if your spouse agreed to live apart, 24 months if they did not.

1
Missouri Revisor of Statutes. Missouri Revised Statutes Section 452.320 – Finding That Marriage Is Irretrievably Broken
2
Missouri Revisor of Statutes. Missouri Revised Statutes Section 452.305 – Judgment of Dissolution, Grounds For
3
Missouri Revisor of Statutes. Missouri Revised Statutes Section 452.310 – Petition, Contents
4
Missouri Revisor of Statutes. Missouri Revised Statutes Section 452.360 – Judgment of Dissolution or Legal Separation