Divorce in Montana, start to finish

Montana has a real fast lane — Joint Dissolution, where both spouses file together as co-petitioners — and a slower route where one files and the other is served. It also has a fork almost nobody knows about: two entirely different ways to prove the marriage is over, and one of them does not require waiting for anything.

Residency comes first. M.C.A. § 40-4-104(1)(a) requires one spouse to be domiciled in Montana, with that domicile maintained for 90 days before filing. There is no way around it. Where there are children under 18, Montana also needs them to have lived here at least six months before the court can rule on parenting — M.C.A. § 40-4-211 — even once the 90 days clear.

Two grounds, and only one of them involves waiting. A petition either checks the box saying the spouses have lived separate and apart more than 180 days (M.C.A. § 40-4-104(1)(b)(i)), or the box for serious marital discord (M.C.A. § 40-4-104(1)(b)(ii)) — see the trap in Section 5. There is no separation period to wait out before filing on the serious-marital-discord ground.

What these statewide forms are not built for. Montana Legal Services Association’s own guidance says the statewide forms are built for simple, uncontested cases — not ones involving a pension or retirement plan, real estate owned with someone outside the marriage or located outside Montana, a family business, a spouse’s bankruptcy, contested custody, or domestic violence. Where any of that is in the case, the forms are still the right forms, but they are not the whole answer: the State Bar Lawyer Referral Service (406-449-6577) and Montana Legal Services Association (1-800-666-6899) are both starting points, and the Montana Coalition Against Domestic and Sexual Violence (406-443-7794) where safety is a concern.

The complete list for both routes, not a shortlist — because which forms a case needs depends on facts only you and, if you need one, your lawyer can weigh. Each row says which route it belongs to and carries the revision date clerks check. Every form here is free, published by the Montana Judicial Branch and Montana Legal Services Association at courts.mt.gov/forms/dissolution.

Every one of these is free. Download fresh each time — the Judicial Branch revises these routinely, and a saved copy from last year may already be superseded. Full catalog: courts.mt.gov/forms/dissolution.

Montana’s self-represented process has a different shape than most states’. Here’s what’s actually true about it.

Montana’s clock is simpler than most states’: there’s no 90-day floor from filing the way Connecticut has. What matters is the 21 days your spouse gets to respond after service — or, if you’re filing jointly, the roughly 120-day window Montana’s own instructions set for a scheduling order to arrive.

These are the specific things that get Montana filings bounced, delayed, or defaulted on.

Montana law (M.C.A. §§ 40-4-252 through 254) requires each spouse to fully disclose every asset, debt, source of income, and expense to the other — not to the court. Leave something off, and the court can presume it should go entirely to your spouse if it’s an asset, or entirely to you if it’s a debt.

What this is. A guide to Montana’s own process, built from the Montana Code Annotated (Title 40, chapter 4, including §§ 40-4-104, 40-4-105, 40-4-126, 40-4-211, 40-4-252 through 254; Title 25, chapter 1, § 25-1-201; Title 3, chapter 1, § 3-1-317; and Title 7, chapter 32, § 7-32-2141), the statewide MP-series self-represented forms and instructions published by the Montana Judicial Branch and Montana Legal Services Association at courts.mt.gov/forms/dissolution and montanalawhelp.org, and fee schedules published by the Montana Judicial Branch and the Clerks of District Court in Yellowstone, Missoula, and Gallatin Counties. The forms themselves are free, and this guide links you to them rather than reselling them.

What this is not. The Cusp is not a law firm and does not practice law. Nothing here is legal advice, and nothing here tells you which choice is right for your particular situation — only what Montana requires of each path. Montana Legal Services Association’s own guidance is explicit that these self-represented forms are built for simple, uncontested cases: if your situation involves a pension or retirement plan, real estate held with someone else or outside Montana, a family business, a pending bankruptcy, contested custody or support, or domestic violence, talk to an attorney before proceeding. The State Bar of Montana’s Lawyer Referral Service (montanabar.org, 406-449-6577) offers a low-cost initial consultation; Montana Legal Services Association (montanalawhelp.org, 1-800-666-6899) provides free help to those who qualify; and the Montana Coalition Against Domestic and Sexual Violence (406-443-7794) can help if safety is a concern. Court Help / Self-Help Law Center staff (courts.mt.gov/SelfHelp, 406-444-9300) can review your forms for completeness but cannot give legal advice.

Confirm current numbers with the Clerk. Filing fees, local sheriff service fees, and judicial-district-specific procedures are set in part by county governing bodies and can change. Where this guide could not verify an exact current figure with confidence, it says so, or points you to the Clerk of District Court in your county rather than guessing.