United States · State guide
Divorce inMontana.
Family law is state law. Here is how it works in Montana: the property rules, support, how to file, what it costs, who enforces it, and every FairWell guide and tool set up for Montana.
Official source: courts.mt.gov
Property division
Equitable distribution state: marital property is divided fairly, which usually means roughly equally but the court can adjust based on statutory factors; separate property stays with the owner.
Residency and waiting period
Court: District Court90 days domicile before filing (MCA 40-4-104); no fixed waiting period, but the court must find the marriage irretrievably broken, shown by more than 180 days living apart or by serious marital discord.
Child support
Guideline based on both parents' resources.
Retirement accounts
Workplace retirement plans are divided by a Qualified Domestic Relations Order (QDRO) prepared after the decree; IRAs are divided by the decree itself. A former spouse married ten years or more may claim Social Security on the ex's record.
Enforcement
Child support is enforced by Montana Child Support Services Division under the federal Title IV-D program: income withholding, tax refund intercepts, license suspension and passport denial for arrears.
Health insurance
Divorce ends a former spouse's eligibility on an employer plan. COBRA continuation is available for up to 36 months at full cost; the ACA marketplace opens a special enrollment period.
Official guidelines and tools
The government and court sources for child support, spousal support, the family law statute and self-help. Use these to check any estimate, including ours.
Common questions
How is property divided in a Montana divorce?
Equitable distribution state: marital property is divided fairly, which usually means roughly equally but the court can adjust based on statutory factors; separate property stays with the owner.
How do I file for divorce in Montana?
90 days domicile before filing (MCA 40-4-104); no fixed waiting period, but the court must find the marriage irretrievably broken, shown by more than 180 days living apart or by serious marital discord. File in the District Court.
When does child support end in Montana?
Child support usually ends at 18, or at high school graduation if later (generally no later than 19). Since 2019, a court can continue support for a child who became disabled before support ended and remains financially dependent; college support is not required.
What happens to property when unmarried couples separate in Montana?
Montana recognizes common-law marriage, so a couple who meets the legal test is treated as married and divides property under divorce rules. Partners who do not qualify are treated as unmarried: property generally belongs to whoever holds title, subject to any written agreement between you.
How long do you need to live in Montana to file for divorce?
One spouse must have lived in Montana for at least 90 days before filing; if there are children under 18, they generally must have lived in Montana for six months before the court can decide parenting issues. Divorce (dissolution) is filed in the District Court.
Official help: Montana Law Help: Filing and Serving Divorce Papers. Rules change, so confirm with a family lawyer in Montana before you rely on them.
Read next
Guides for Montana
Filing for an uncontested divorce in the US
GuideWhat divorce costs in the US
GuideQDROs and retirement accounts
GuideDivorce and US taxes
GuideHealth insurance after divorce
GuideRelocation with children
GuideThe complete parenting plan guide
GuideYour separation date controls everything
GuideHidden assets: warning signs
GuideJoint debt at separation
GuideWhen your ex won't pay
GuideSeparating when there is abuse
Professionals
Family lawyers, mediators and coaches in Montana
Family lawyers
Listings marked Verified have been checked against the state bar directory. Each lawyer sets their own fees.
DirectoryMediators
Family mediators for parenting and financial issues. Listings marked Verified have been checked against their association.
DirectoryDivorce coaches and counselors
Decision support, communication and co-parenting help. What a coach does.
Are you a professional in Montana? List your practice.
Montana
Get organized in Montana
Guided questions for separation agreements, parenting plans and financial disclosure, linked to the official sources on this page and organized into a plain-language summary for a local family lawyer, who prepares the agreement and advises you.
Sources and further reading
This page is legal information, not legal advice. It summarizes how the process works in Montana so you can plan; the official sources above are where current fees, forms and deadlines live, and they are the final word if anything here differs. When you're ready, the assessment and FairWell's guided questions link to the rules for Montana; a local lawyer prepares any agreement and advises you before you sign.