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Montana Divorce Petition

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Introduction

A Montana divorce petition, formally called a Petition for Dissolution of Marriage, is the legal pleading a spouse files with the District Court to open a case that legally ends a marriage, styled a "dissolution of marriage" rather than a "divorce." To file, one spouse must have been domiciled in Montana for the 90 days preceding the commencement of the action (Mont. Code Ann. § 40-4-104(1)(a)). Montana is a pure no-fault jurisdiction, so the only ground is that the marriage is "irretrievably broken" (Mont. Code Ann. § 40-4-104(1)(b)), proven either by living separate and apart for more than 180 days before commencement or by serious marital discord that adversely affects one or both spouses' attitude toward the marriage. There is no fixed statutory waiting period once the Petition is filed; the practical minimum is the 20-day window the Respondent has to answer after service. The District Court hears the case, and if either spouse contests that the marriage is irretrievably broken, the court may continue the matter 30 to 60 days and order a conciliation conference under Mont. Code Ann. § 40-4-107.

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Key Things to Know

  1. 1

    Definition: A Petition for Dissolution of Marriage is Montana's name for the opening pleading that starts a case to legally end a marriage. The spouse who files it is the Petitioner, the other spouse is the Respondent, and Montana calls the proceeding a "dissolution of marriage" rather than a "divorce."

  2. 2

    Residency: At least one spouse must have been domiciled in Montana for the 90 days immediately preceding the filing (Mont. Code Ann. § 40-4-104(1)(a)). Domicile means your permanent home, not merely a mailing address.

  3. 3

    Grounds: Montana is pure no-fault. The sole ground is that the marriage is 'irretrievably broken' (Mont. Code Ann. § 40-4-104(1)(b)), shown by either living separate and apart for more than 180 days or serious marital discord affecting a spouse's attitude toward the marriage. Because separation is only an alternative to proving discord, spouses are not required to live apart before filing.

  4. 4

    Waiting period: Montana imposes no fixed statutory waiting period after filing. The practical floor is the Respondent's 20-day period to answer after service, and a contested irretrievable-breakdown claim can trigger a 30-to-60-day continuance and a conciliation conference under Mont. Code Ann. § 40-4-107.

  5. 5

    Property: Montana is an equitable-distribution state, not a community-property state. Under Mont. Code Ann. § 40-4-202 the District Court equitably apportions all marital property regardless of which spouse holds title, and 'equitable' does not automatically mean a 50/50 split.

  6. 6

    Court and forms: You open the case in the District Court, Montana's court of general jurisdiction, by filing two documents with the clerk, a Petition for Dissolution of Marriage and a Summons. The proceeding is called 'dissolution of marriage' rather than 'divorce.'

  7. 7

    Fee: The typical District Court filing fee is $170, due when the Petition and Summons are submitted. Fee-waiver relief may be available for filers who cannot afford the cost.

Key decisions before you file

Before you file a Divorce Petition in Montana, a few decisions shape the document: which option to choose and what each one means. The Divorce Petition guide walks through them.

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Where and How to File in Montana

Montana ends a marriage through a "dissolution of marriage," not a "divorce," and the case belongs in the District Court, the state's court of general jurisdiction. The spouse who starts the case is the Petitioner; the other spouse is the Respondent. To open the matter you file two core papers, a Petition for Dissolution of Marriage and a Summons, then pay the typical $170 district court filing fee. You can begin with a Divorce Petition (/legal-document/divorce-petition) that captures Montana's required allegations before you reach the clerk's office.

The 90-Day Residency Rule

Before the District Court can hear your case, one spouse must have been domiciled in Montana for the 90 days preceding the commencement of the action (Mont. Code Ann. § 40-4-104(1)(a)). Domicile means more than a mailing address, it is the place you treat as your permanent home. If neither spouse clears the 90-day threshold, the petition is premature and the court cannot proceed.

A Pure No-Fault Ground

Montana recognizes one ground for dissolution: the marriage is "irretrievably broken" (Mont. Code Ann. § 40-4-104(1)(b)). You prove it one of two ways, either by showing the spouses have lived separate and apart for more than 180 days before commencement, or by showing serious marital discord that adversely affects the attitude of one or both spouses toward the marriage. You never allege adultery, cruelty, or any other fault. Because the 180-day separation is only an alternative to proving discord, Montana does not require spouses to live apart before they file.

Waiting Period and Timing

Montana sets no fixed statutory waiting period after filing. The practical floor is the 20-day window the Respondent has to answer after being served. If the Respondent contests that the marriage is irretrievably broken, the court may continue the matter 30 to 60 days and order a conciliation conference under Mont. Code Ann. § 40-4-107, a pause meant to test whether reconciliation is possible before the dissolution moves forward.

Dividing Property

Montana is an equitable-distribution state, not a community-property state. Under Mont. Code Ann. § 40-4-202, the District Court equitably apportions all marital property regardless of whose name holds title. The judge weighs each spouse's contributions, the length of the marriage, and their respective economic circumstances. "Equitable" means fair given the parties' situation, which does not automatically mean a 50/50 split, so how an asset is titled does not decide who keeps it.

Before You File

Confirm the 90-day domicile is met, decide whether you will prove irretrievable breakdown through the 180-day separation or through serious marital discord, and gather the property details the court needs for an equitable apportionment. Filing the Petition for Dissolution of Marriage and Summons in the correct District Court, with the $170 fee, starts the Respondent's 20-day answer clock and sets Montana's no-fault process in motion.

Montana Requirements for Divorce Petition

Residency (State)

Spouses must meet the residency requirement: One of the spouses must have been domiciled in Montana for 90 days preceding the commencement of the action (Mont. Code Ann. § 40-4-104(1)(a))..

Residency (County)

Must file in the correct county District Court Montana's court.

Grounds for Divorce

Must properly plead grounds: Pure no-fault. The sole ground is that the marriage is 'irretrievably broken,' established by either (i) living separate and apart for more than 180 days preceding commencement, or (ii) serious....

Waiting Period

Mandatory waiting period: No fixed statutory waiting period after filing; however, if irretrievable breakdown is contested, the court may continue the matter 30....

Required Forms

Must file correct state forms: Petition for Dissolution of Marriage and Summons..

Property Division

Property is divided according to: Equitable distribution. The court equitably apportions all marital property regardless of title (Mont. Code Ann.... laws.

Filing Fee

Filing fee is typically $170 (typical district court filing fee). unless waived.

Service of Process

The Respondent must be properly served with the summons and petition.

Frequently Asked Questions

A divorce petition is the written pleading that opens a divorce case. In Montana it is formally titled a Petition for Dissolution of Marriage, and the spouse who files it is the Petitioner. It asks the District Court to end the marriage and to resolve related issues such as property division.

There is no substantive difference; the terms describe the same process. 'Divorce' is the everyday word, while Montana law calls the proceeding a 'dissolution of marriage' and titles the opening document a Petition for Dissolution of Marriage. Filing that petition begins the dissolution, and the parties are the Petitioner and the Respondent.

One of the spouses must have been domiciled in Montana for the 90 days preceding the commencement of the action (Mont. Code Ann. § 40-4-104(1)(a)). Domicile means the place you treat as your permanent home, not simply a mailing address.

Montana is pure no-fault. The sole ground is that the marriage is 'irretrievably broken,' established by either living separate and apart for more than 180 days preceding commencement, or serious marital discord that adversely affects the attitude of one or both spouses toward the marriage (Mont. Code Ann. § 40-4-104(1)(b)).

No. Living separate and apart for more than 180 days is one way to prove irretrievable breakdown, but it is not required, because serious marital discord that affects a spouse's attitude toward the marriage is an alternative way to establish the ground. Spouses may file while still living together.

Montana sets no fixed statutory waiting period after filing, so the practical minimum is the 20-day window the Respondent has to answer after service. If irretrievable breakdown is contested, the court may continue the matter 30 to 60 days and order a conciliation conference under Mont. Code Ann. § 40-4-107.

The initial filing fee is typically $170, the usual District Court charge, due when you submit the Petition for Dissolution of Marriage and Summons. Filers who cannot afford the fee can request a waiver from the court.

Montana follows equitable distribution. Under Mont. Code Ann. § 40-4-202 the District Court equitably apportions all marital property regardless of title, meaning property is divided fairly according to the parties' circumstances rather than automatically split 50/50. Montana is not a community-property state.