Montana
Legal Separation in Montana: Requirements, Orders and Conversion
Independently fact-checked against primary sources (last audited October 8, 2026). · 7 primary sources cited on this page. How we verify our legal content
Yes. Montana courts grant a decree of legal separation under MCA 40-4-104(2): when one spouse asks for legal separation instead of dissolution, "the court shall grant the decree in that form unless the other party objects." No earlier than 6 months after the decree is entered, either spouse can move to convert it into a dissolution of marriage (MCA 40-4-108(2)).
Information last verified on 2026-10-08. This article has not been reviewed by a licensed lawyer.
Jurisdiction scope: This article covers Montana's decree of legal separation under MCA 40-4-104, 40-4-108, 40-4-201 and 40-4-202. It does not cover maintenance amounts, child support calculations, tax effects of a separation decree, inheritance rules beyond MCA 72-2-812 and 72-2-814, Montana case law, or other states' law. For divorce grounds and procedure, see Montana divorce laws.
Does Montana allow legal separation?
Yes. Montana handles legal separation inside the same statute that governs dissolution of marriage. MCA 40-4-104(2) provides:
"If a party requests a decree of legal separation rather than a decree of dissolution of marriage, the court shall grant the decree in that form unless the other party objects."
The Montana Courts forms page for dissolution, legal separation and annulment states the same rule and is the official starting point for forms.
The statute ties the separation form of the decree to the other spouse not objecting. This page does not cover how the court proceeds when the other spouse does object; a Montana lawyer can explain the options in that situation.
What you have to show
A legal separation rests on the same findings as a dissolution. Under MCA 40-4-104(1)(b), the court must find "that the marriage is irretrievably broken," and that finding must be supported by evidence:
"(i) that the parties have lived separate and apart for a period of more than 180 days preceding the commencement of this proceeding; or (ii) that there is serious marital discord that adversely affects the attitude of one or both of the parties towards the marriage"
The statute lists these as alternatives, so either kind of evidence can support the finding.
Residency requirement
Under MCA 40-4-104(1)(a), one of the spouses must have been domiciled in Montana, as provided in MCA 25-2-118, or stationed in Montana as a member of the armed services, and "the domicile or military presence has been maintained for 90 days preceding the filing of the action." The 90-day rule is written into the dissolution statute, and MCA 40-4-108(4)(b)(ii)(A) refers back to the 40-4-104 jurisdictional requirements for legal separation decrees.
What a Montana court can order in a legal separation
Property. Under MCA 40-4-202(1), the court in a dissolution "shall, and in a proceeding for legal separation may, finally equitably apportion between the parties the property and assets belonging to either or both." Dividing the property is mandatory in a divorce and optional in a legal separation.
Separation agreements. Spouses can settle the terms in a written separation agreement. Under MCA 40-4-201, in a proceeding for dissolution or legal separation, the terms of the agreement, "except those providing for the support, parenting, and parental contact with children, are binding upon the court unless it finds ... that the separation agreement is unconscionable." Unless the agreement provides otherwise, terms the court accepts are set out in the decree (MCA 40-4-201(4)). Terms about children stay subject to the court's own review.
Maintenance, parenting and child support. MCA 40-4-104(1)(c) directs the court to consider maintenance, parenting and child support to the extent it has jurisdiction over them. For how support is set, see Montana alimony laws, Montana child custody laws and Montana child support laws.
Converting a legal separation to a divorce
A legal separation decree does not end the marriage the way a dissolution decree does. Montana provides a direct path to convert it. MCA 40-4-108(2) states:
"No earlier than 6 months after entry of a decree of legal separation, the court on motion of either party shall convert the decree to a decree of dissolution of marriage."
Three points follow from the text. Either spouse may file the motion, the earliest date is 6 months after the separation decree was entered, and once a motion is filed after that date the statute says the court "shall" convert the decree.
When the decree takes effect
Under MCA 40-4-108(1), "A decree of dissolution of marriage or of legal separation is final when entered, subject to the right of appeal."
Under MCA 72-2-812(1), a decree of separation that does not end the marriage is not a divorce for purposes of deciding who is a surviving spouse, so a separation decree alone does not take away surviving-spouse status. The exception in 72-2-812(2)(c): a spouse who was a party to a valid proceeding concluded by an order purporting to terminate all marital property rights is not a surviving spouse for the probate purposes that subsection lists. A separation decree is also not a divorce for the rule in MCA 72-2-814 that revokes will gifts and beneficiary designations to a former spouse (72-2-814(1)(b)). This page does not cover tax or benefits effects; ask a Montana lawyer about those before relying on a separation decree.
Legal separation or divorce?
Both decrees come out of the same type of case, with the same 90-day residency rule and the same irretrievable-breakdown finding (MCA 40-4-104). The differences are in the result. A legal separation leaves the spouses married until the decree is converted, the court is permitted rather than required to divide property, and either spouse can turn the decree into a dissolution after 6 months. For divorce grounds and steps, see Montana divorce laws.
Disclaimer: This article provides general legal information about legal separation under Montana law, mainly MCA 40-4-104 and 40-4-108. It is not legal advice. The information was verified on 2026-10-08, and the law can change. For advice about your situation, consult a lawyer licensed in Montana or use the Montana Courts self-help resources.
Related
- Legal separation laws in every state
- Montana divorce laws
- Montana alimony laws
- Montana child custody laws
- Montana child support laws
Last updated: 2026-10-08.
Frequently Asked Questions
Can my spouse stop a legal separation in Montana?
MCA 40-4-104(2) tells the court to grant a requested legal separation unless the other party objects. This page does not cover how the court proceeds after an objection; a Montana lawyer can explain the options.
How long do you have to be separated before a legal separation in Montana?
No fixed separation period is required if there is serious marital discord. Otherwise, the irretrievable-breakdown finding rests on more than 180 days living separate and apart before filing (MCA 40-4-104(1)(b)).
How do I turn a Montana legal separation into a divorce?
File a motion. No earlier than 6 months after the separation decree was entered, the court on the motion of either party shall convert it to a dissolution decree (MCA 40-4-108(2)).
Does the court divide property in a Montana legal separation?
It may. MCA 40-4-202(1) says the court shall divide property in a dissolution and may do so in a legal separation.
What is the residency requirement for legal separation in Montana?
A spouse must have been domiciled in Montana, or stationed here in the armed services, for 90 days before filing (MCA 40-4-104(1)(a)).
Is a separation agreement binding in Montana?
Its terms bind the court unless the court finds the agreement unconscionable, except terms on child support, parenting and parental contact, which the court reviews itself (MCA 40-4-201).
Updates
Independently fact-checked against the cited primary sources
The Law Behind This Article
This article rests on the statutory provisions below, held in our own legal record and retrieved from the official source. Tap a section to read the operative text.
Montana Code Annotated, Title 40
§ 40-4-104Dissolution Of Marriage -- Legal SeparationIn forcecited in 2 of our articles
40-4-104. Dissolution of marriage -- legal separation. (1) The district court shall enter a decree of dissolution of marriage if: (a) the court finds that one of the parties, at the time the action was commenced, was domiciled in this state, as provided in 25-2-118, or was stationed in this state while a member of the armed services and that the domicile or military presence has been maintained for 90 days preceding the filing of the action; (b) the court finds that the marriage is irretrievably broken, which findings must be supported by evidence: (i) that the parties have lived separate and apart for a period of more than 180 days preceding the commencement of this proceeding; or (ii) that there is serious marital discord that adversely affects the attitude of one or both of the parties towards the marriage; and (c) to the extent it has jurisdiction to do so, the court has considered, approved, or made provision for parenting, the support of any child entitled to support, the maintenance of either spouse, and the disposition of property.
Official text (excerpt) · last checked 2026-09-05 · Read the full text in our law library · Verify at mca.legmt.gov
Cited in 13 court opinions in our collectionLatest citing opinion in our collection: 2014
Opinions citing this section in our collection:
- In re the Marriage of Geror (Montana Supreme Court 2000, 299 Mont. 33)“…rretrievably broken and satisfies the other requirements of § 40-4-104, MCA, the court shall enter a decree of diss…”
- Miller v. Miller (Montana Supreme Court 1980, 189 Mont. 356)“…statutes of Montana, the Uniform Marriage and Divorce Act. Section 40-4-104, MCA, recites in applicable part: “(1…”
- In Re the Marriage of Krause (Montana Supreme Court 1982, 200 Mont. 368)“…The authority is found in section 40-4-104, MCA, which r e a d s i n p a r t :…”
Identified automatically from the court opinions citing this section — not a ranking of which case controls.
Also relied on in: Montana Divorce Laws (2026): Grounds, Residency, and Process
§ 40-4-108DecreeIn forcecited in 3 of our articles
40-4-108. Decree. (1) A decree of dissolution of marriage or of legal separation is final when entered, subject to the right of appeal. An appeal from the decree of dissolution that does not challenge the finding that the marriage is irretrievably broken does not delay the finality of that provision of the decree that dissolves the marriage beyond the time for appealing from that provision, and either of the parties may remarry pending appeal. (2) No earlier than 6 months after entry of a decree of legal separation, the court on motion of either party shall convert the decree to a decree of dissolution of marriage. (3) The clerk of the court shall give notice of the entry of a decree of dissolution: (a) if the marriage is registered in this state, to the clerk of the district court of the county where the marriage is registered, who shall enter the fact of dissolution in the book in which the marriage license and certificate are recorded; or (b) if the marriage is registered in another jurisdiction, to the appropriate official of that jurisdiction, with the request that the official enter the fact of dissolution in the appropriate record.
Official text (excerpt) · last checked 2026-07-29 · Read the full text in our law library · Verify at mca.legmt.gov
Cited in 4 court opinions in our collectionLatest citing opinion in our collection: 1993
Opinions citing this section in our collection:
- In Re the Marriage of Kraut (Montana Supreme Court 1986, 220 Mont. 267)“…Howeyer, we do not agree. Wife points to the language of § 40-4-108, MCA, and the Commissioner's Comment to this…”
- In Re the Marriage of Griffin (Montana Supreme Court 1993, 260 Mont. 124)“…appeal. Martin correctly points out that pursuant to 5 40-4-108, MCA, a decree of dissolution is "final when…”
- State Ex Rel. Marlenee v. District Court of the Fifteenth Judicial District (Montana Supreme Court 1979, 181 Mont. 59)“…irects our attention to section 48- 328, R.C.M. 1947, now section 40-4-108 MCA, providing that a decree of dissolution…”
Identified automatically from the court opinions citing this section — not a ranking of which case controls.
Also relied on in: Montana Name Change Laws: How to Legally Change Your Name, Name Change After Divorce
§ 40-4-202Division Of PropertyIn forcecited in 4 of our articles
40-4-202. Division of property. (1) In a proceeding for dissolution of a marriage, legal separation, or division of property following a decree of dissolution of marriage or legal separation by a court that lacked personal jurisdiction over the absent spouse or lacked jurisdiction to divide the property, the court, without regard to marital misconduct, shall, and in a proceeding for legal separation may, finally equitably apportion between the parties the property and assets belonging to either or both, however and whenever acquired and whether the title to the property and assets is in the name of the husband or wife or both. In making apportionment, the court shall consider the duration of the marriage and prior marriage of either party, the age, health, station, occupation, amount and sources of income, vocational skills, employability, estate, liabilities, and needs of each of the parties, custodial provisions, whether the apportionment is in lieu of or in addition to maintenance, and the opportunity of each for future acquisition of capital assets and income.
Official text (excerpt) · last checked 2026-07-29 · Read the full text in our law library · Verify at mca.legmt.gov
Cited in 400 court opinions in our collectionLatest citing opinion in our collection: 2026
Opinions citing this section in our collection:
- In Re Marriage of Engen (Montana Supreme Court 1998, 289 Mont. 299)“…Morse v. Morse (1977), 174 Mont. 541, 571 P.2d 1147. ¶28 Section 40-4-202, MCA, now sets forth the guidelines for dist…”
- In Re the Marriage of Funk (Montana Supreme Court 2012, 363 Mont. 352)“…3 STANDARD OF REVIEW ¶6 Section 40-4-202, MCA, governs the distribution of a marital…”
- In Re the Marriage of Beadle (Montana Supreme Court 1998, 291 Mont. 1)“…as heretofore been an unclear area of the law. ¶30 Under § 40-4-202, MCA, in dividing the property of the marria…”
Identified automatically from the court opinions citing this section — not a ranking of which case controls.
Also relied on in: Common Law Marriage in Montana: Is It Recognized? (2026), Montana Prenuptial Agreement Laws: Requirements and Enforcement
§ 40-4-201Separation AgreementIn force
40-4-201. Separation agreement. (1) To promote amicable settlement of disputes between parties to a marriage attendant upon their separation or the dissolution of their marriage, the parties may enter into a written separation agreement containing provisions for disposition of any property owned by either of them, maintenance of either of them, and support, parenting, and parental contact with their children. In cases in which children are involved, the separation agreement may contain a parenting plan as required in 40-4-234. (2) Subject to subsection (7), in a proceeding for dissolution of marriage or for legal separation, the terms of the separation agreement, except those providing for the support, parenting, and parental contact with children, are binding upon the court unless it finds, after considering the economic circumstances of the parties and any other relevant evidence produced by the parties, on their own motion or on request of the court, that the separation agreement is unconscionable.
Official text (excerpt) · last checked 2026-07-29 · Read the full text in our law library · Verify at mca.legmt.gov
§ 40-4-107Irretrievable BreakdownIn forcecited in 2 of our articles
40-4-107. Irretrievable breakdown. (1) If both of the parties by petition or otherwise have stated under oath or affirmation that the marriage is irretrievably broken or one of the parties has so stated and the other has not denied it, the court, after hearing, shall make a finding whether the marriage is irretrievably broken. (2) If one of the parties has denied under oath or affirmation that the marriage is irretrievably broken, the court shall consider all relevant factors, including the circumstances that gave rise to filing the petition and the prospect of reconciliation, and shall: (a) make a finding whether the marriage is irretrievably broken; or (b) continue the matter for further hearing not fewer than 30 or more than 60 days later or as soon thereafter as the matter may be reached on the court's calendar and may suggest to the parties that they seek counseling. At the adjourned hearing the court shall make a finding whether the marriage is irretrievably broken. (3) A finding of irretrievable breakdown is a determination that there is no reasonable prospect of reconciliation.
Official text (excerpt) · last checked 2026-07-29 · Read the full text in our law library · Verify at mca.legmt.gov
Cited in 3 court opinions in our collectionLatest citing opinion in our collection: 1985
Opinions citing this section in our collection:
- State Ex Rel. Marlenee v. District Court of the Fifteenth Judicial District (Montana Supreme Court 1979, 181 Mont. 59)“…bly broken . . ." Section 48-319, R.C.M. 1947,-now section 40-4-107 MCA. (Emphasis supplied.) No such finding w…”
- In Re the Marriage of Kraut (Montana Supreme Court 1985, 215 Mont. 170)“…her or not the marriage is irretrievably broken. Section 40-4-107, MCA !Section 305, UMDA). Wife alleges t…”
Identified automatically from the court opinions citing this section — not a ranking of which case controls.
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Sources and References
- MCA 40-4-104(mca.legmt.gov).gov
- MCA 40-4-108(mca.legmt.gov).gov
- Montana Courts: Dissolution, Legal Separation, and Annulment forms(courts.mt.gov).gov
- MCA 40-4-202(mca.legmt.gov).gov
- MCA 40-4-201(mca.legmt.gov).gov
- MCA 72-2-812(mca.legmt.gov).gov
- MCA 72-2-814(mca.legmt.gov).gov