Montana Child Support Calculator
Calculate child support in Montana using the state's official Melson Formula. Includes custody adjustments, health insurance credits, and childcare deductions.
Montana divorces typically cost 52% less than the national average of $12,900.
Child Support in Montana
- Formula
- Melson Formula
- Income cap
- None specified
- Equal parenting presumption
- No
- Property system
- Equitable distribution
Child Support Calculator in Montana: What You Should Know
Montana is one of three states that uses the Melson Formula, applied through its own version in the Montana Child Support Guidelines. The formula sets aside a personal allowance for each parent before income is treated as available, funds the children's basic needs, and then shares any remaining income so children benefit from a higher standard of living. This approach ties support closely to what each parent can actually afford after basic living costs. Montana has no flat income cap, so support scales with the parents' available income.
Key point: Montana uses a Melson-based formula that protects a personal allowance for each parent before calculating the children's support.
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Locked to Montana on this page.
Use your gross (before-tax) monthly income. If you are paid annually, divide by 12.
Use their gross (before-tax) monthly income. If they are paid annually, divide by 12.
This estimate is for planning purposes only and does not constitute legal or financial advice. Consult a licensed family law attorney in your state for guidance specific to your situation.
Child Support in Montana - Frequently Asked Questions
How is child support calculated in Montana?
Montana uses the Melson Formula to calculate child support. The Melson Formula first reserves a self-support amount for each parent, then calculates the child's share of the remaining income.
Can child support be modified in Montana?
Yes. Either parent can request a child support modification if there has been a substantial change in circumstances, such as a significant change in income, change in custody arrangements, or changes in the child's needs. Courts in Montana typically require a change of at least 15-20% in the support amount to justify modification.
Does custody arrangement affect child support in Montana?
Yes. Parenting time is a significant factor in child support calculations. When a parent has the children for a substantial portion of time (typically 40% or more overnights per year), child support is adjusted to reflect the additional direct costs that parent bears.
Is there an income cap for child support in Montana?
Montana does not set a specific income cap in its child support formula. However, courts have discretion to deviate from the guideline amount in cases with very high incomes.
How long does child support last in Montana?
Child support in Montana typically continues until the child turns 18 or graduates from high school, whichever is later. Support may continue longer if the child has a disability or if the parents agree to extend support for college expenses.
This estimate is for planning purposes only and does not constitute legal or financial advice. Consult a licensed family law attorney in your state for guidance specific to your situation.