Calculate Child Support
Before taxes. Include wages, self-employment, bonuses.
Montana uses the Melson Formula â both incomes required.
0 = no custody ¡ 91 = 25% ¡ 182 = 50/50 ¡ 365 = full custody
$0
estimated monthly support payment
â ī¸ Estimate only. Actual court-ordered amounts may vary. Verify with a licensed Montana family law attorney.
âšī¸ Montana uses the Melson Formula â Montana uses the Melson Formula. Considers each parent's self-support reserve before calculating child support.
How Child Support Works in Montana
Montana uses the Melson Formula to determine child support obligations.
The Melson Formula first reserves a self-support amount for each parent's basic needs, then calculates the child's primary support needs, and finally adds a standard of living adjustment. Only 3 states use this model.
Frequently Asked Questions
How is child support calculated in Montana?
Montana uses the Melson Formula model. Montana uses the Melson Formula. Considers each parent's self-support reserve before calculating child support.
When does child support end in Montana?
Child support generally ends when the child turns 18 in Montana.
Can I modify child support in Montana?
Yes. Montana requires a 10% or greater change in income to qualify. Use our modification checker â
Does 50/50 custody eliminate child support in Montana?
Not automatically. The higher-earning parent typically still pays support with 50/50 custody. See our 50/50 guide â
What income is used for child support in Montana?
Income includes wages, self-employment, bonuses, rental income, unemployment benefits, disability payments, and Social Security. Courts may impute income if a parent is voluntarily underemployed.