HowMuchChildSupport

Child support for 1 child in Montana

Montana guidelines effective February 1, 2026. Montana overview

For 1 child, with Parent A earning $60,000 and Parent B $40,000, Montana's guideline amount is $598 a month (Parent A pays Parent B).

This is the guideline amount, not a court order.

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Include wages, self-employment, bonuses, and other income the guidelines count.

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Guideline child support

Choose your state and enter both incomes to see the guideline amount.

Child support for 1 child in Montana by income

Monthly guideline amount for 1 child by Parent A's and Parent B's yearly income; the child lives mostly with Parent B (Parent A has 52 overnights a year).
Parent A incomeParent B $0Parent B $30,000Parent B $50,000Parent B $80,000
$20,000$134$134$134$134
$25,000$218$218$218$218
$30,000$365$256$256$256
$35,000$458$297$294$294
$40,000$524$382$332$332
$45,000$582$453$377$370
$50,000$635$519$443$408
$55,000$688$581$505$445
$60,000$737$638$567$496
$65,000$781$696$624$553
$70,000$825$744$677$602
$75,000$867$786$724$653
$80,000$905$833$771$699
$90,000$984$917$860$788
$100,000$1,060$1,002$948$881
$120,000$1,215$1,166$1,117$1,055
$150,000$1,440$1,395$1,355$1,297
$200,000$1,817$1,785$1,754$1,705
$250,000$2,188$2,161$2,134$2,094

Parenting time and child support for 1 child

Monthly guideline amount for 1 child by Parent A's income and overnights a year with Parent A; Parent B earns $40,000. "B→A" means Parent B pays.
Parent A income0 nights52 nights104 nights128 nights182 nights
$20,000$134$134$134$43$232 B→A
$25,000$218$218$218$118$181 B→A
$30,000$256$256$256$157$141 B→A
$35,000$294$294$294$197$96 B→A
$40,000$333$333$333$235$59 B→A
$45,000$408$408$408$305$5 B→A
$50,000$474$474$474$366$39
$55,000$541$541$541$427$84
$60,000$598$598$598$478$114
$65,000$656$656$656$528$143
$70,000$704$704$704$570$168
$75,000$751$751$751$611$191
$80,000$797$797$797$652$215
$90,000$886$886$886$730$259
$100,000$971$971$971$804$302
$120,000$1,140$1,140$1,140$952$387
$150,000$1,377$1,377$1,377$1,160$506
$200,000$1,772$1,772$1,772$1,505$705
$250,000$2,148$2,148$2,148$1,834$894

How the number of children changes the amount in Montana

For one child, the guideline amount ranges from $134 a month when Parent A earns $20,000 to $2,148 a month at $250,000, with Parent B earning $40,000.

Montana uses a Melson-type formula on yearly amounts. Each parent keeps a personal allowance of $20,748. The children's primary allowance ($6,224 a year for one child) and their expenses are shared by the parents' incomes above the allowance; a standard of living adjustment then adds a share of each parent's remaining income.

Frequently asked questions

How much is child support for 1 child in Montana on $50,000?

If Parent A earns $50,000 a year, Parent B earns $40,000 and the child lives mostly with Parent B, Montana's guideline amount is about $474 a month (Parent A pays Parent B).

How much is child support for 1 child in Montana on $100,000?

If Parent A earns $100,000 a year, Parent B earns $40,000 and the child lives mostly with Parent B, the guideline amount is about $971 a month (Parent A pays Parent B).

How much more is child support for 1 child than for one child in Montana?

This page is for one child. With the same incomes, the guideline amount for two children is about $866 a month.

Does equal parenting time change child support for 1 child in Montana?

With about equal parenting time and the same incomes ($60,000 and $40,000), the guideline amount is about $114 a month (Parent A pays Parent B), against $598 when Parent A has 52 overnights a year. When the children spend more than 110 days a year with each parent, each parent's amount is reduced for the days above that number and the parent who owes more pays the difference.

Official sources and verification

Guidelines effective February 1, 2026. Verified against the official Montana sources on October 7, 2026. How we calculate →