In a Montana divorce (the statutes call it a dissolution of marriage), the court divides property by equitable apportionment. Under MCA § 40-4-202(1), the judge must fairly divide the property and assets belonging to either or both spouses, however and whenever acquired, after weighing a list of factors set by the Legislature. There is no fixed percentage. This page is the starting point for the property and debt section of our Montana Divorce Guide.
The Rule: Equitable Apportionment
The key sentence of MCA § 40-4-202(1) says that in a dissolution the court, "without regard to marital misconduct, shall ... 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."
Three things follow from those words. The division is supposed to be final. It is supposed to be equitable, which is a judgment about fairness, not arithmetic. And it reaches everything either spouse owns. Montana is not a community property state, and nothing in the statute presumes a 50/50 split. Whether an equal division is the fair one depends on the facts of the marriage.
What Goes Into the Marital Estate
Everything. The statute does not start by sorting property into "mine," "yours," and "ours." The Montana Supreme Court has read it to mean that a court must equitably apportion "all assets and property of either or both spouses, regardless of by whom and when acquired," including property owned before the marriage and property received by gift or inheritance (In re Marriage of Funk, 2012 MT 14, ¶ 19, 363 Mont. 352, 270 P.3d 39).
That does not mean premarital or inherited property is always shared. For that kind of property the statute adds a second set of considerations, centered on what the other spouse contributed. Our page on premarital, gifted, and inherited property explains how that works.
The disclosure statutes use the same wide lens. They define an asset as "any real or personal property of any nature however and whenever acquired," tangible or intangible, existing or contingent, and they define the marital estate as "all assets and liabilities" (MCA § 40-4-251). Each spouse has to list all of it. See financial disclosure in a Montana divorce.
The Factors a Judge Must Consider
The statute says the court "shall consider" the following. No single factor controls, and the statute does not rank them.
| Subject | What MCA § 40-4-202(1) lists |
|---|---|
| The marriage | Duration of the marriage and any prior marriage of either spouse |
| Each spouse personally | Age, health, station, occupation, vocational skills, and employability |
| Each spouse financially | Amount and sources of income, estate, liabilities, and needs |
| The rest of the decree | Custodial provisions, and whether the apportionment is in lieu of or in addition to maintenance |
| The future | The opportunity of each spouse for future acquisition of capital assets and income |
| What each spouse did | The contribution or dissipation of value of the respective estates, and the contribution of a spouse as a homemaker or to the family unit |
Notice that property and maintenance (the statutory word for alimony) are tied together. The court looks at whether the property award stands in place of maintenance or comes on top of it. Where there are children, the court may also set aside part of the estate in a separate fund or trust for their support, education, and welfare (MCA § 40-4-202(2)).
Misconduct Is Not a Factor. Dissipation Is.
Montana divides property "without regard to marital misconduct." The reasons a marriage ended do not raise or lower either spouse's share.
Financial conduct is a different matter. The court must consider the "contribution or dissipation of value of the respective estates." A spouse who built up the estate, and a spouse who ran it down, can both expect that history to be weighed. The rules on wasted and undisclosed assets, including the presumption that an asset left off a final disclosure may be awarded to the other spouse, are covered in hidden assets and dissipation.
How Particular Kinds of Property Are Handled
The same statute governs every asset, but each kind of property raises its own practical questions. The rest of this section takes them one at a time:
- Premarital, gifted, and inherited property
- The house
- 401(k)s, pensions, and IRAs
- Montana public pensions (PERS, TRS, and others)
- Military retired pay and benefits
- A family or closely held business
- Farms and ranches
- Debts
- Vehicles, household goods, and pets
- Undisclosed assets and wasted money
- A prenuptial agreement
Dividing Property by Agreement
Spouses do not need a judge to decide all of this. Montana law lets them sign a written separation agreement that disposes of any property owned by either of them (MCA § 40-4-201(1)). The property terms bind the court unless it finds, after considering the spouses' economic circumstances, that the agreement is unconscionable (MCA § 40-4-201(2)). Our page on the marital settlement agreement covers what goes in one.
A premarital agreementcan also change the result, because the statute says premarital agreements must be enforced as provided in Montana's Uniform Premarital Agreement Act (MCA § 40-4-202(5)).
How Final Is a Property Division?
Very. Unlike child support or a parenting plan, the property terms of a decree "may not be revoked or modified by a court" except on the written consent of both spouses, or if the court finds conditions that justify reopening a judgment under Montana law (MCA § 40-4-208(3)). A decree may also be modified for failure to disclose assets and liabilities (MCA § 40-4-208(8)).
That finality is the reason to get the inventory and the values right before you sign anything. If you are deciding how to approach your own case, our property division pagedescribes how A&M Law works on these questions.
This page explains Montana law in general as of the 2025 Montana Code Annotated. It is not legal advice about your specific case.