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Divorce with Children in Montana

How divorce affects children in Montana. Custody, support, and co-parenting strategies. Montana follows equitable distribution.

Property Type

Equitable

Filing Fee

$170–$230

Median Cost

$7,500–$30,000

Annual Divorces

4,000+

Understanding Divorce with Children in Montana

Montana courts determine all custody matters using the best interest of the child standard. This means the court evaluates each parent’s ability to provide a stable, nurturing environment, the child’s existing relationships and routines, and any special needs or preferences (for children old enough to express them).

Child support in Montana is calculated using the Melson Formula. Both parents' incomes are combined, and the state's guideline table determines the total obligation. Each parent's share is proportional to their income.

Montana recognizes both legal custody (decision-making authority) and physical custody (where the child lives). Joint legal custody is common; physical custody arrangements vary based on the family’s circumstances. The filing fee to initiate custody proceedings in Montana is $170–$230.

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Common Questions

How long do you have to live in Montana to file for divorce?
Montana requires 90 days of residency before you can file for divorce. Mont. Code §40-4-104 governs the filing requirements.
Is Montana a community property or equitable distribution state?
Montana follows equitable distribution rules, meaning the court divides marital assets fairly but not necessarily equally.
How much does a divorce cost in Montana?
Filing fees in Montana range from $170–$230. The median total cost is approximately $7,500 for uncontested divorces and $30,000 for contested cases.
How long does a divorce take in Montana?
Montana has a mandatory waiting period of 20 days. Uncontested divorces typically finalize in 2–4 months, while contested cases can take 12–18 months or longer.
How is child support calculated in Montana?
Montana uses the Melson Formula, a modified income shares model with a self-support reserve. The formula considers both parents' incomes, number of children, health insurance costs, and childcare expenses.

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Related Resources

This page provides general information about divorce with children in Montana and is not legal advice. Verify current statutes with Mont. Code §40-4-104 or consult a licensed Montana attorney. Last reviewed March 2026.