Child support for 3 children in Montana
Montana guidelines effective February 1, 2026. Montana overview
For 3 children, with Parent A earning $60,000 and Parent B $40,000, Montana's guideline amount is $1,089 a month (Parent A pays Parent B).
This is the guideline amount, not a court order.
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Guideline child support
Choose your state and enter both incomes to see the guideline amount.
Child support for 3 children in Montana by income
| Parent A income | Parent B $0 | Parent B $30,000 | Parent B $50,000 | Parent B $80,000 |
|---|---|---|---|---|
| $20,000 | $135 | $135 | $135 | $135 |
| $25,000 | $219 | $219 | $219 | $219 |
| $30,000 | $408 | $297 | $255 | $255 |
| $35,000 | $723 | $477 | $390 | $327 |
| $40,000 | $1,032 | $633 | $537 | $465 |
| $45,000 | $1,143 | $771 | $675 | $585 |
| $50,000 | $1,245 | $909 | $804 | $714 |
| $55,000 | $1,347 | $1,029 | $924 | $828 |
| $60,000 | $1,443 | $1,152 | $1,044 | $948 |
| $65,000 | $1,527 | $1,263 | $1,155 | $1,059 |
| $70,000 | $1,611 | $1,356 | $1,260 | $1,152 |
| $75,000 | $1,695 | $1,446 | $1,350 | $1,242 |
| $80,000 | $1,767 | $1,536 | $1,440 | $1,335 |
| $90,000 | $1,920 | $1,710 | $1,611 | $1,515 |
| $100,000 | $2,067 | $1,872 | $1,785 | $1,686 |
| $120,000 | $2,367 | $2,199 | $2,118 | $2,022 |
| $150,000 | $2,799 | $2,658 | $2,586 | $2,499 |
| $200,000 | $3,525 | $3,420 | $3,366 | $3,288 |
| $250,000 | $4,242 | $4,155 | $4,101 | $4,038 |
Parenting time and child support for 3 children
| Parent A income | 0 nights | 52 nights | 104 nights | 128 nights | 182 nights |
|---|---|---|---|---|---|
| $20,000 | $135 | $135 | $135 | $54 B→A | $618 B→A |
| $25,000 | $219 | $219 | $219 | $24 | $558 B→A |
| $30,000 | $255 | $255 | $255 | $63 | $513 B→A |
| $35,000 | $426 | $426 | $426 | $219 | $387 B→A |
| $40,000 | $573 | $573 | $573 | $357 | $282 B→A |
| $45,000 | $720 | $720 | $720 | $492 | $177 B→A |
| $50,000 | $849 | $849 | $849 | $609 | $93 B→A |
| $55,000 | $969 | $969 | $969 | $720 | $15 B→A |
| $60,000 | $1,089 | $1,089 | $1,089 | $828 | $63 |
| $65,000 | $1,200 | $1,200 | $1,200 | $930 | $132 |
| $70,000 | $1,293 | $1,293 | $1,293 | $1,014 | $189 |
| $75,000 | $1,383 | $1,383 | $1,383 | $1,095 | $243 |
| $80,000 | $1,476 | $1,476 | $1,476 | $1,176 | $297 |
| $90,000 | $1,656 | $1,656 | $1,656 | $1,338 | $405 |
| $100,000 | $1,827 | $1,827 | $1,827 | $1,491 | $504 |
| $120,000 | $2,154 | $2,154 | $2,154 | $1,782 | $684 |
| $150,000 | $2,622 | $2,622 | $2,622 | $2,196 | $942 |
| $200,000 | $3,393 | $3,393 | $3,393 | $2,877 | $1,353 |
| $250,000 | $4,128 | $4,128 | $4,128 | $3,522 | $1,734 |
How the number of children changes the amount in Montana
With Parent A earning $60,000 and Parent B $40,000, the guideline amount for 3 children is $1,089 a month, about 1.82 times the $598 for one child. Support rises with each child, but by less than the first child's amount, because the guidelines reflect how households share costs among children.
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 3 children in Montana on $50,000?
If Parent A earns $50,000 a year, Parent B earns $40,000 and the children live mostly with Parent B, Montana's guideline amount is about $849 a month (Parent A pays Parent B).
How much is child support for 3 children in Montana on $100,000?
If Parent A earns $100,000 a year, Parent B earns $40,000 and the children live mostly with Parent B, the guideline amount is about $1,827 a month (Parent A pays Parent B).
How much more is child support for 3 children than for one child in Montana?
At $60,000 (Parent B $40,000), the amount for 3 children is about 1.82 times the amount for one child: $1,089 against $598 a month.
Does equal parenting time change child support for 3 children in Montana?
With about equal parenting time and the same incomes ($60,000 and $40,000), the guideline amount is about $63 a month (Parent A pays Parent B), against $1,089 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
- Law: MCA 40-4-204, 40-5-209, 40-6-116; Admin. R. Mont. 37.62.101–37.62.148
- Montana child support guidelines
- Montana Child Support Guidelines Worksheets A–E
- Montana DPHHS Child Support Services Division (CSSD)
- Changing a Montana child support order
Guidelines effective February 1, 2026. Verified against the official Montana sources on October 7, 2026. How we calculate →