Timeline in Montana

The 90-day residency requirement

Montana district courts require at least one spouse to have been domiciled in the state, or stationed there on active duty, for the 90 days right before the petition is filed. This is jurisdictional. If neither spouse meets the 90-day threshold, the court has no authority to grant the dissolution. It does not matter how complete the rest of the paperwork is. Couples who recently moved to Montana sometimes have to wait out the remainder of the 90 days before filing anything.

Two ways to show the marriage is irretrievably broken

Montana's sole ground for divorce is that the marriage is irretrievably broken. MCA 40-4-104 gives two ways to prove it. The first is that the spouses have lived separate and apart for more than 180 days before the petition. The second is that there is serious marital discord affecting one or both spouses' attitude toward the marriage. That second path needs no separation period at all.

It's an easy detail to miss. Many people assume Montana always requires roughly six months apart before filing. But a petition alleging serious marital discord can move forward with no separation behind it. Which path applies changes how early in the process a case can realistically be filed.

Service and the 21-day response window

After a petition is filed, it has to be served on the other spouse. Only then can the case move forward. Once served, the respondent generally has 21 days to file a response with the court. If no response comes in that window, the case can proceed toward a default. That means the court may enter a decree based on the petitioner's filings alone. A respondent who wants to contest any part of the case, from property to parenting terms, needs to act inside that 21-day window.

The uncontested path and where filing happens

Montana district courts handle every dissolution case. Filing goes through the Clerk of District Court in the right county. When both spouses agree on the terms, the case can move through the court without extended hearings, once the paperwork is in order. That includes a completed parenting plan if there are minor children. Montana runs a statewide e-filing system, but the courts' own instructions say it is not yet enabled for self-represented filers. So pro se spouses file on paper at the Clerk of District Court's office instead of online. Self-help materials and step-by-step form packets are available through the Montana Judicial Branch's Court Help Program.

What slows a case down or restarts the clock

A few things commonly extend a Montana divorce beyond the minimum. If a spouse relies on the 180-day separation path and the couple resumes living together, the separation clock generally has to start over. Improper or incomplete service delays the case until it's fixed, since a response deadline can't run until service is valid. Contested issues add hearings and scheduling time an uncontested case never needs, especially disputes over parenting plans or property. Mediation and parenting-class requirements are set at the judicial-district level, not statewide. So a contested parenting matter may need to clear a local mediation or education requirement before a hearing gets set.