Montana Divorce Property Division: The Complete 2026 Guide

Montana is an equitable distribution state with a unique feature: under MCA §40-4-202, courts equitably apportion ALL property and assets, "however and whenever acquired". This includes premarital property.

This is broader than most states — similar only to Hawaii. Marital misconduct is explicitly NOT a factor. The court considers 13+ factors including duration, ages/health, standard of living, occupation, income, contributions, and homemaker contribution.

Montana uses the Modified Melson Formula for child support — one of only 3 states (with Delaware and Hawaii). Named after Delaware Family Court Judge Elwood F. Melson Jr.

Three-step model: (1) self-support allowance at 1.3× federal poverty guideline deducted from each parent’s income; (2) primary support obligation calculated from remaining combined income; (3) SOLA (Standard of Living Adjustment) applied to remaining income above basic needs.

Approximate percentages after Melson adjustments: 1 child ~17%, 2 ~25%, 3 ~30%, 4 ~34%, 5 ~37%. All schedule values are approximations.

Montana alimony under MCA §40-4-203 requires strict eligibility: spouse must (a) lack sufficient property for reasonable needs AND (b) be unable to self-support through employment, OR (c) be custodian of a child requiring home care.

No formula. No statutory cap. Strong preference for rehabilitative/limited-term alimony. Factors: time needed for education/training, standard of living, duration, age/health, paying spouse’s ability.

90-day residency (MCA §40-4-104). No mandatory waiting period.

No-fault: irretrievably broken (serious marital discord OR 180-day separation).

Montana has a progressive ~2-6.75% state income tax. This is moderate nationally and affects post-divorce financial planning.