Montana Alimony & Spousal Support (2026)
Unlike child support, Montana has no fixed formula for how much alimony (spousal support) costs or how long it lasts. A judge decides both based on a list of factors set out in MCA § 40-4-203. There is no calculator that can honestly give you an exact number here — but the factors below are what actually drives the decision.
What determines alimony in Montana
Under MCA § 40-4-203 (Montana Code Annotated, Title 40, Chapter 4, § 40-4-203 (Maintenance)), a court considers:
- Financial resources of the party seeking maintenance, including marital property apportioned to that party, and that party's ability to meet their needs independently
- Time necessary to acquire sufficient education or training to enable the party seeking maintenance to find appropriate employment
- Standard of living established during the marriage
- Duration of the marriage
- Age and the physical and emotional condition of the spouse seeking maintenance
- Ability of the spouse from whom maintenance is sought to meet their own needs while meeting those of the spouse seeking maintenance
Good to know
- Montana calls spousal support "maintenance," not alimony, and courts may only award it after finding the requesting spouse lacks sufficient property to meet their reasonable needs and either cannot become self-supporting through appropriate employment or is a custodian of a child whose circumstances make outside employment inappropriate.
- Once that threshold is met, § 40-4-203 sets no formula, percentage, or duration cap for the amount — the court weighs the six statutory factors "without regard to marital misconduct" and sets an amount and duration it considers just.
Also need a child support estimate?
Alimony and child support are calculated completely separately in Montana. If you also have children, use our free Montana child support calculator — that one does compute a real number, based on the official guideline formula.
Frequently asked questions
Is there an alimony formula in Montana?
No. Montana law (MCA § 40-4-203) sets no formula or percentage for maintenance. A court must first find the requesting spouse is eligible, then sets the amount and duration it considers just based on six statutory factors — there is no calculation a couple can run themselves.
What factors determine alimony in Montana?
Under MCA § 40-4-203, a Montana court weighs the requesting spouse's financial resources and ability to be self-supporting, the time needed to get education or training for employment, the marital standard of living, the duration of the marriage, the requesting spouse's age and physical/emotional condition, and the paying spouse's ability to meet their own needs while paying maintenance.
Source: Montana Code Annotated, Title 40, Chapter 4, § 40-4-203 (Maintenance) · Last verified 2026-07-22
Disclaimer: This page explains the general legal framework for alimony in Montana and is for informational purposes only — it is not legal advice and does not predict the outcome of any specific case. Laws change; always verify with the official source above or a family law attorney licensed in Montana before making decisions.