How to File for Divorce in Montana (2026)
Reviewed by DocDraft Legal Team · Montana · Last updated 2026-05-18
Filing for divorce in Montana means working within Montana's own rules on residency, grounds, property, and support. Montana divides marital property under equitable distribution (a fair, not automatically equal, split), and the no-fault path is granted when the marriage is irretrievably broken. Before filing, note the residency rule: One party must have been domiciled in Montana, or stationed in Montana as a member of the armed services, for 90 days preceding the filing of the action. This guide walks the Montana-specific steps, forms, and statutes (Mont. Code Ann. § 40-4-104(1)(b)) you need.
Key Considerations
The asset question in a Montana divorce is governed by equitable-distribution. Equitable distribution: the court divides marital property in such proportions as the court deems just considering 9 enumerated factors at § 40-4-202 (duration of marriage and prior marriages; age, health, occupation, amount and sources of income, vocational skills, employability, estate, liabilities, and needs of each spouse; 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). The controlling authority is Mont. Code Ann. § 40-4-202.
For ongoing support, Court may grant maintenance only if the spouse seeking it lacks sufficient property to provide for reasonable needs and is unable to be self-supporting through appropriate employment, or is custodian of a child whose condition makes outside employment inappropriate; amount and duration consider 6 enumerated factors Mont. Code Ann. § 40-4-203 sets the rule.
The child-support number is not discretionary: Montana Child Support Guidelines (Admin. R. Mont. 37.62.101 et seq.) use a unique income-shares variant with a self-support reserve; both parents' gross income is netted of allowable deductions, applied to a primary support obligation, then prorated. Long-distance parenting credits and shared-parenting adjustments apply Mont. Code Ann. § 40-4-204; Admin. R. Mont. 37.62.101 et seq. codifies it, with the official calculator via the state agency.
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Relevant Documents
For a Montana case specifically, Petition for Dissolution of Marriage (MP-114 without children, MP-115 with children) or Joint Petition (MP-117/MP-118); accompanied by Vital Statistics Form (VSA-101) and Final Parenting Plan (when minor children involved)
Child Support Worksheet
This document calculates the appropriate amount of child support based on both parents' incomes, the custody arrangement, and other factors.
Final Decree of Divorce
This is the final court order that legally ends your marriage and includes all the terms of your divorce including property division, support, and child custody arrangements.
Financial Disclosure Declaration
Both spouses must complete this document detailing all assets, debts, income, and expenses to ensure fair division of property and appropriate support amounts.
Marital Settlement Agreement
This document outlines the terms of your divorce agreement including property division, debt allocation, spousal support, and child custody arrangements if applicable.
Parenting Plan
If you have children, this document details the custody arrangement, visitation schedule, and decision-making responsibilities for the children.
Qualified Domestic Relations Order (QDRO)
This document is necessary if you need to divide retirement accounts or pension benefits between spouses as part of the divorce settlement.
Response to Petition for Dissolution
If you're the responding spouse, this document allows you to answer the claims in the petition and state your own requests regarding the divorce terms.
Summons
This document notifies your spouse that a divorce action has been filed and that they have a certain amount of time to respond.
Wage Withholding Order
This document directs an employer to withhold child support or spousal support payments from a spouse's paycheck.
Relevant Laws
Montana Dissolution of Marriage - No-Fault Divorce
Montana is a 'no-fault' divorce state, meaning you don't need to prove wrongdoing by either spouse to get divorced. You only need to show that the marriage is 'irretrievably broken' due to serious marital discord that adversely affects the attitude of one or both parties toward the marriage, or that there has been a separation of at least 180 days.
Montana Residency Requirements for Divorce
To file for divorce in Montana, at least one spouse must have been a resident of Montana for at least 90 days immediately before filing the petition. This residency requirement must be met before Montana courts have jurisdiction over your divorce case.
Montana Property Division - Equitable Distribution
Montana follows 'equitable distribution' principles when dividing marital property. This doesn't necessarily mean a 50/50 split, but rather a fair division based on factors including length of marriage, age and health of each spouse, occupation, income, vocational skills, employability, and contributions to the marriage including as a homemaker.
Montana Child Custody Determinations
Montana courts determine child custody (called 'parenting' in Montana) based on the best interests of the child. The court considers factors such as the child's wishes, each parent's wishes, the child's relationship with each parent, the child's adjustment to home/school/community, and any history of domestic violence.
Montana Child Support Guidelines
Montana uses specific guidelines to calculate child support based on both parents' incomes, the number of children, healthcare costs, childcare expenses, and other factors. These guidelines create a presumptive amount of support, though courts can deviate from the guidelines in appropriate circumstances.
Montana Spousal Maintenance (Alimony)
Montana courts may award spousal maintenance (alimony) if a spouse lacks sufficient property to provide for reasonable needs and is unable to be self-supporting through appropriate employment. The amount and duration depend on factors including the financial resources of each spouse, the standard of living established during the marriage, and the duration of the marriage.
Montana Divorce Waiting Period
Montana has a 20-day waiting period after filing before a divorce can be finalized. However, in practice, most divorces take longer due to court schedules and the time needed to resolve issues like property division, debt allocation, and parenting arrangements.
Regional Variances
Western Montana
Missoula County has a specialized Family Law Self-Help Center that provides additional resources for pro se litigants. They offer more extensive form packets and in-person assistance compared to other counties. The county also has specific local rules requiring mediation in most divorce cases before a final hearing can be scheduled.
Flathead County requires additional financial disclosure forms beyond the standard Montana requirements. The county also has a unique parenting plan worksheet that must be completed when children are involved in a divorce case.
Central Montana
As the state capital's county, Lewis and Clark has more streamlined procedures for divorce cases. The county offers e-filing options not available in all Montana jurisdictions, and has specific local rules regarding temporary support hearings that differ from other counties.
Cascade County has implemented a specialized case management system for high-conflict divorce cases. The county also requires additional documentation for property division when real estate is involved, including specific appraisal requirements not mandated statewide.
Eastern Montana
As Montana's most populous county, Yellowstone has longer processing times for divorce filings. The county has implemented a unique case management system with specific scheduling procedures. Additionally, they have specialized procedures for cases involving business valuations and complex asset division.
Due to the oil industry presence, Richland County has developed specific procedures for handling divorces involving oil and mineral rights. The county also has different approaches to determining income for support calculations when oil field employment is involved.
Tribal Jurisdictions
Divorces involving tribal members on the Blackfeet Reservation may fall under tribal court jurisdiction rather than Montana state courts. The Blackfeet Tribal Court applies different laws and procedures than state courts, particularly regarding child custody and property division for trust lands.
The Crow Tribal Court has jurisdiction over divorces between tribal members residing on the reservation. Their procedures differ significantly from Montana state law, with greater emphasis on extended family involvement in custody decisions and different approaches to property division.
Suggested Compliance Checklist
Check that the residency rule is met
Before filing days after startingOne party must have been domiciled in Montana, or stationed in Montana as a member of the armed services, for 90 days preceding the filing of the action. See Mont. Code Ann. § 40-4-104(1)(a).
Plead the grounds for the divorce
Before filing days after startingPure no-fault: dissolution granted on irretrievable breakdown of the marriage, evidenced by (i) parties living separate and apart for more than 180 days preceding the commencement of the proceeding, or (ii) serious marital discord that adversely affects the attitude of one or both parties toward the marriage. Authority: Mont. Code Ann. § 40-4-104(1)(b).
Open the case by filing the petition
At filing days after startingPetition for Dissolution of Marriage (MP-114 without children, MP-115 with children) or Joint Petition (MP-117/MP-118); accompanied by Vital Statistics Form (VSA-101) and Final Parenting Plan (when minor children involved) The filing fee is $250 ($200 filing fee plus $50 judgment fee) for a Petition for Dissolution of Marriage in District Court. A fee waiver is available: Statement of Inability to Pay Court Costs and Fees (also called Affidavit of Inability to Pay) waives filing fees on approval by the District Court judge.
Calendar the statutory timeline
After filing days after starting20 days from filing before a final hearing may be held on a contested dissolution; 180-day separation period, if used to establish irretrievable breakdown, must be completed before filing. See Mont. Code Ann. § 40-4-130; § 40-4-104(1)(b).
Serve the spouse and complete financial disclosure
After filing days after startingThe responding spouse must be formally served, and both sides typically exchange a financial affidavit before the case proceeds.
Obtain the final judgment
Final step days after startingAfter timing and any custody, support, and property terms are settled, the court signs the decree of dissolution.
| Task | Description | Document | Days after starting |
|---|---|---|---|
| Check that the residency rule is met | One party must have been domiciled in Montana, or stationed in Montana as a member of the armed services, for 90 days preceding the filing of the action. See Mont. Code Ann. § 40-4-104(1)(a). | - | Before filing |
| Plead the grounds for the divorce | Pure no-fault: dissolution granted on irretrievable breakdown of the marriage, evidenced by (i) parties living separate and apart for more than 180 days preceding the commencement of the proceeding, or (ii) serious marital discord that adversely affects the attitude of one or both parties toward the marriage. Authority: Mont. Code Ann. § 40-4-104(1)(b). | - | Before filing |
| Open the case by filing the petition | Petition for Dissolution of Marriage (MP-114 without children, MP-115 with children) or Joint Petition (MP-117/MP-118); accompanied by Vital Statistics Form (VSA-101) and Final Parenting Plan (when minor children involved) The filing fee is $250 ($200 filing fee plus $50 judgment fee) for a Petition for Dissolution of Marriage in District Court. A fee waiver is available: Statement of Inability to Pay Court Costs and Fees (also called Affidavit of Inability to Pay) waives filing fees on approval by the District Court judge. | divorce-petition | At filing |
| Calendar the statutory timeline | 20 days from filing before a final hearing may be held on a contested dissolution; 180-day separation period, if used to establish irretrievable breakdown, must be completed before filing. See Mont. Code Ann. § 40-4-130; § 40-4-104(1)(b). | - | After filing |
| Serve the spouse and complete financial disclosure | The responding spouse must be formally served, and both sides typically exchange a financial affidavit before the case proceeds. | - | After filing |
| Obtain the final judgment | After timing and any custody, support, and property terms are settled, the court signs the decree of dissolution. | - | Final step |
Frequently Asked Questions
Pure no-fault: dissolution granted on irretrievable breakdown of the marriage, evidenced by (i) parties living separate and apart for more than 180 days preceding the commencement of the proceeding, or (ii) serious marital discord that adversely affects the attitude of one or both parties toward the marriage. The governing statute is Mont. Code Ann. § 40-4-104(1)(b).
One party must have been domiciled in Montana, or stationed in Montana as a member of the armed services, for 90 days preceding the filing of the action. This is set by Mont. Code Ann. § 40-4-104(1)(a).
$250 ($200 filing fee plus $50 judgment fee) for a Petition for Dissolution of Marriage in District Court Statement of Inability to Pay Court Costs and Fees (also called Affidavit of Inability to Pay) waives filing fees on approval by the District Court judge
Montana uses equitable distribution (a fair, not automatically equal, split). Equitable distribution: the court divides marital property in such proportions as the court deems just considering 9 enumerated factors at § 40-4-202 (duration of marriage and prior marriages; age, health, occupation, amount and sources of income, vocational skills, employability, estate, liabilities, and needs of each spouse; 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). See Mont. Code Ann. § 40-4-202.
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