Divorce in Montana — the plain-English overview

Montana calls divorce dissolution of marriage, was one of the first states to adopt the Uniform Marriage and Divorce Act (and thus uses much of that statute's framework), and routes cases through the District Court. The state has a relatively short residency requirement and a 20-day cooling-off period, paired with a 180-day separation requirement to support the no-fault ground if it's contested. None of this replaces talking to a Montana family-law attorney about your specifics, but knowing the basics helps you read your own paperwork.

Where you file

Montana dissolutions are filed in the District Court of the county where either spouse lives. At least one spouse must have been a Montana resident for 90 days before the petition is filed (Mont. Code § 40-4-104).

Montana has 56 counties grouped into 22 judicial districts. Yellowstone (Billings), Missoula, Gallatin (Bozeman), Cascade (Great Falls), and Flathead (Kalispell) counties handle the largest family-law caseloads. The District Court is the trial court of general jurisdiction.

How long it takes

Montana imposes a 20-day floor between service of the petition and the entry of a decree (Mont. Code § 40-4-105). The clock runs from when the respondent is served (or when summons is otherwise complete).

If both spouses agree that the marriage is irretrievably broken (and either both file a joint petition or the petition states they have lived separate and apart for more than 180 days), the court generally accepts the finding without further inquiry.

Property — what state law assumes

Montana is an equitable distribution state. The court divides property — both marital and separate — in a manner the court finds equitable, considering factors including each spouse's contribution to acquisition (including as homemaker), the duration of the marriage, the age and health of each party, occupation, amount and sources of income, vocational skills, employability, estate, liabilities, and needs (Mont. Code § 40-4-202). Unusually, Montana's statute reaches all property — including premarital property and inheritances — though those typically stay with the spouse who brought them in unless equity requires otherwise.

Montana's equitable-distribution framework comes directly from the Uniform Marriage and Divorce Act, which shapes outcomes in several other UMDA-state jurisdictions.

Custody — the starting framework

Montana retired "custody" in favor of a parenting plan under Mont. Code § 40-4-212. The plan must allocate the time the child spends with each parent and the residential schedule, decision-making for major issues (education, healthcare, religious upbringing), and dispute resolution. The court applies a best-interest analysis weighing 13 factors including the wishes of the child's parent and the child, the interaction and interrelationship of the child with parents, siblings, and other significant persons, the child's adjustment to home, school, and community, the mental and physical health of all individuals involved, physical abuse or threat of physical abuse, chemical dependency, continuity and stability of care, developmental needs of the child, whether either parent has knowingly failed to pay birth-related costs, whether either parent has knowingly failed to financially support a child the parent has reason to know is the parent's child, adverse effects on the child resulting from continuous and vexatious parenting-plan amendment, and whether the child has frequent and continuing contact with both parents.

Montana has no statutory presumption favoring joint or equal parenting time, but the legislature has emphasized that frequent and continuing contact with both parents generally serves the child's best interest.

Filing fees and fee waivers

The District Court filing fee for a Montana dissolution petition is approximately $170 statewide. Service of process adds another $30–$50 if the sheriff serves.

If you can't afford the fee, Montana lets you file a Statement of Inability to Pay Court Costs and Fees under Mont. Code § 25-10-404. You provide an affidavit of your income, household size, and inability to pay; if granted, the court waives the filing fee and certain other court-imposed costs.

What this page can't tell you

Montana's 22 judicial districts run dissolution practice with some local variation:

• Whether your district requires mediation of contested parenting-plan disputes (many do, especially in larger counties).
• Local rules on case-management scheduling for contested cases.
• The specific parent-education program your county approves for divorces involving children.
• Whether your district has a self-help center or family-law facilitator.

The Montana Judicial Branch (courts.mt.gov) hosts statewide forms, the Family Court self-help portal, and procedural information. Your county's Clerk of District Court is the authoritative source for local rules and fee schedules. For anything strategic — especially around equitable distribution, maintenance, or contested parenting plans — talk to a Montana family-law attorney.

Statutes referenced

• Residency — Mont. Code § 40-4-104
• 20-day floor before decree — Mont. Code § 40-4-105
• Equitable distribution — Mont. Code § 40-4-202
• Parenting plan — best-interest factors — Mont. Code § 40-4-212
• Statement of inability to pay / fee waiver — Mont. Code § 25-10-404

These are the controlling statutes for the facts on this page. State law changes; the linked text always reflects current law.