Montana Divorce With Children — Custody & Support

When children are involved, a Montana divorce must address custody, visitation, and child support in addition to property division and spousal support. Courts prioritize the Best interests of the child in every decision §40-4-212.

Courts determine parenting plans based on the best interests of the child, considering all relevant parenting factors, including the child's relationship with each parent and siblings, the child's adjustment to home, school, and community, the mental and physical health of all individuals involved, physical abuse or threats of abuse, continuity and stability of care, and the child's developmental needs.

Types of custody

• Legal custody — the right to make major decisions about the child's education, health care, and welfare
• Physical custody — where the child lives day-to-day
• Joint custody — both parents share legal custody, physical custody, or both
• Sole custody — one parent has primary decision-making authority or residential time

Montana uses an income-shares model to calculate child support.

• Based on combined adjusted gross income of both parents using Montana Child Support Guidelines
• Presumptive guideline amount; deviation requires written findings
• Health insurance and childcare costs factored into the calculation
• Income can be withheld directly from the paying parent's employer §40-5-411

Most Montana courts require a written parenting plan that addresses:

• Regular custody and visitation schedule
• Holiday and vacation time allocation
• Transportation arrangements and exchange locations
• Decision-making authority for education, health, and extracurricular activities
• Communication protocols between parents
• Relocation restrictions and notice requirements

During the proceedings, courts may issue temporary orders for maintenance and child support and adopt interim parenting plans, and may exclude a party from the family home upon a showing that physical or emotional harm would otherwise result. Temporary custody and support orders typically remain in effect until the final decree is entered.

A parenting plan may be modified upon showing a change in the child's circumstances and that amendment is necessary to serve the child's best interests, considering factors such as whether the parents agree, whether the child has been integrated into the petitioner's family with consent, whether the child is 14 or older and desires the change, or whether one parent has willfully denied contact with the other parent. §40-4-219