Divorce in Montana: Laws, Process, and What You Need to Know (2026)

Q: Can I get alimony in Montana?

Yes, Montana courts can award maintenance the Montana term for alimony when a spouse lacks sufficient property to provide for their reasonable needs and is unable to support themselves through appropriate employment. The court considers factors including financial resources, the time needed to acquire education or training, the standard of living during the marriage, the length of the marriage, age and health, and earning capacity. Maintenance may be temporary or longer-term depending on the circumstances.

Introduction

Montana is a strictly no-fault state that uses the term dissolution of marriage. With a relatively small population, Montana's family courts tend to be less backlogged than those in larger states, which can mean faster resolution times.

Montana is an equitable distribution state for property division purposes. For an overview of how this system works, see our guide to property division. Understanding how Montana handles divorce can help you prepare for what lies ahead and make informed decisions about your future.

Residency Requirements

To file for divorce in Montana, you must meet the state's residency requirements: 90 days residency. This means at least one spouse must have lived in Montana for the required period before the court will accept a divorce filing. You will typically file in the county where either spouse resides.

Grounds for Divorce

Montana allows both no-fault and fault grounds for divorce. No-fault: irretrievable breakdown (must live separate and apart for 180 days or serious marital discord). Fault grounds: adultery, mental cruelty, willful desertion, substance abuse, and others. While most divorces proceed on no-fault grounds, filing on fault grounds can sometimes affect alimony or property division outcomes.

Property Division

Montana follows the equitable distribution approach to dividing property in a divorce. Under this system, the court divides marital property fairly, though not necessarily equally. The judge considers factors like each spouse's economic circumstances, contributions to the marriage (including homemaking), the duration of the marriage, and any dissipation of assets.

Property that either spouse owned before the marriage, as well as gifts and inheritances received individually, is generally considered separate property and is not subject to division. However, if separate property has been commingled with marital assets, it may lose its separate character.

Alimony and Spousal Support

The court considers several factors when determining alimony in Montana:

Financial resources
Time to acquire education/training
Standard of living
Length of marriage
Age and health
Earning capacity

In Montana, alimony is referred to as "maintenance." Courts award maintenance when a spouse lacks sufficient property and is unable to support themselves through appropriate employment.

For a comprehensive overview of alimony types and negotiation strategies, see our alimony and spousal support guide. The duration and amount of alimony depend heavily on the length of the marriage and the financial circumstances of both parties. Short-term marriages are less likely to result in long-term alimony awards.

Child Support

Montana uses the Income Shares model for calculating child support, based on combined gross income of both parents.

See our child support guide for a detailed explanation of calculation models and modification rules. Either parent can request a modification of child support if there is a substantial change in circumstances, such as a significant change in income, job loss, or a change in the child's needs.

Child Custody

Montana courts determine custody based on the best interests of the child standard. The court evaluates a range of factors including each parent's relationship with the child, the child's adjustment to home and community, the mental and physical health of all parties, and the willingness of each parent to foster a relationship between the child and the other parent.

Most states, including Montana, recognize both legal custody (decision-making authority regarding education, healthcare, and welfare) and physical custody (where the child lives). Both types can be awarded jointly or solely to one parent.

Mediation

Mediation is not required in Montana, though it is often encouraged.

Filing Fees and Costs

Filing fees for divorce in Montana typically range from $150-$250, though exact amounts vary by county. Additional costs may include:

Attorney fees (if you hire a lawyer)
Mediation or alternative dispute resolution fees
Process server or publication fees
Costs for financial experts or appraisers (in complex asset cases)
Court-mandated parenting class fees (if children are involved)

Uncontested divorces are generally significantly less expensive than contested cases.

Key Considerations

Waiting period: 20 days after service
Common law marriage: Montana recognizes common law marriage, which means unmarried couples who meet certain criteria may need to formally divorce.

If you and your spouse can agree on the major issues, including property division, support, and custody, an uncontested divorce will save you significant time and money. Even in contested cases, exploring mediation or collaborative divorce may lead to a better outcome than a courtroom battle.

Frequently Asked Questions About Montana Divorce

Is Montana a community property state?

No, Montana is not a community property state. Montana uses equitable distribution to divide marital property during a divorce. The court divides assets and debts in a manner that is fair and just, but not necessarily equal. The judge considers factors such as each spouse's contributions, the duration of the marriage, economic circumstances, and each party's age and health.

How is property divided in a Montana divorce?

Montana courts divide marital property through equitable distribution. The court considers factors including the duration of the marriage, each spouse's age and health, the earning capacity of each party, contributions to the marriage (including homemaking), and the economic circumstances of each spouse. Separate property, such as assets owned before the marriage or received as individual gifts or inheritances, generally remains with the original owner unless it has been commingled.

How long does a divorce take in Montana?

Montana has a relatively short mandatory waiting period of 20 days after the respondent is served. However, the no-fault ground requires that spouses have lived separate and apart for at least 180 days or that there is serious marital discord affecting the attitude of one or both parties toward the marriage. An uncontested dissolution can often be finalized in one to three months. Contested cases typically take six months to a year or longer.

Can I get alimony in Montana?

Yes, Montana courts can award maintenance (the Montana term for alimony) when a spouse lacks sufficient property to provide for their reasonable needs and is unable to support themselves through appropriate employment. The court considers factors including financial resources, the time needed to acquire education or training, the standard of living during the marriage, the length of the marriage, age and health, and earning capacity. Maintenance may be temporary or longer-term depending on the circumstances.

What are the grounds for divorce in Montana?

Montana allows both no-fault and fault-based grounds for dissolution. The no-fault ground requires an irretrievable breakdown of the marriage, which can be established by living separate and apart for 180 days or demonstrating serious marital discord. Fault grounds include adultery, mental cruelty, willful desertion, habitual substance abuse, and other misconduct. Montana uses the term "dissolution of marriage" rather than "divorce." Most dissolutions proceed on no-fault grounds.

What are the residency requirements for divorce in Montana?

At least one spouse must have been domiciled in Montana for at least 90 days before filing for dissolution of marriage. The petition is filed in the district court of the county where either spouse resides. Montana's 90-day residency requirement is relatively short compared to many states.

How much does a divorce cost in Montana?

Filing fees for a Montana dissolution typically range from $150 to $250, depending on the county. An uncontested dissolution without attorneys can cost under $500. Contested cases with attorney representation generally cost $5,000 to $15,000 or more per spouse. Montana's relatively small population means family courts tend to be less backlogged, which can reduce the time and cost associated with contested proceedings.

Does Montana recognize common law marriage?

Yes, Montana is one of a small number of states that recognizes common law marriage. If a couple is competent to marry, mutually consents to be married, lives together, and holds themselves out as married, they may be considered legally married under Montana law without a formal ceremony or marriage license. This means common law spouses in Montana must go through the formal dissolution process to legally end their relationship, just as couples with a ceremonial marriage would.

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