Idaho child support calculator (2026 guidelines)
Idaho guidelines effective July 1, 2025. Change state
For 2 children, with Parent A earning $60,000 and Parent B $40,000, Idaho's guideline amount is $705 a month (Parent A pays Parent B).
Idaho uses the income shares model; its current guidelines took effect July 1, 2025.
This is the guideline amount, not a court order.
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Guideline child support
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Idaho child support at a glance
| Children | $30,000 | $50,000 | $75,000 | $100,000 |
|---|---|---|---|---|
| 1 child | $282 | $449 | $606 | $738 |
| 2 children | $378 | $611 | $836 | $1,035 |
| 3 children | $392 | $657 | $932 | $1,184 |
| 4 children | $392 | $1,397 | $1,699 | $1,984 |
| 5 children | $455 | $1,584 | $1,915 | $2,233 |
How Idaho calculates child support
Idaho uses the income shares model. The schedule is a set of percentages of the parents' combined annual Guidelines Income, falling as income rises; each bracket's monthly amount is added up, and each parent is responsible for their share of combined income.
Guidelines Income is gross income before taxes from almost any source, less support and maintenance paid under other orders, maintenance ordered in this case, and the guideline support for other children living with a parent. Child support received doesn't count.
When the children spend more than 25% of the overnights with each parent, the basic obligation is multiplied by 1.5, each parent's share is multiplied by the other parent's share of overnights, and the two are offset. No one pays more than they would without shared custody.
Support should rarely be zero. Idaho presumes at least $50 a month per child, and when the paying parent earns under $800 a month the court reviews whether that parent can still meet basic needs.
Work-related child care and the children's health insurance premium are shared by income share, with credit to the parent who pays. The parent with the larger tax benefit for the children under the official tables claims them, and the other parent receives their income share of that benefit.
Support paid under other orders is deducted from income, and so is the guideline support for other children living with a parent, figured on that parent's income alone.
The schedule covers combined Guidelines Income up to $440,000 a year. Above that the court decides any additional support case by case; this estimate shows the amount for the top of the schedule.
The schedule's monthly amounts are whole dollars, and the amount to be ordered is rounded to the nearest dollar, as in the guidelines' worked example.
Parenting time in Idaho
When the children spend more than 25% of the overnights with each parent, the basic obligation is multiplied by 1.5, each parent's share is multiplied by the other parent's share of overnights, and the two are offset. No one pays more than they would without shared custody.
| Overnights with Parent A | Guideline amount | Who pays |
|---|---|---|
| 0 | $705 a month | Parent A pays Parent B |
| 52 | $705 a month | Parent A pays Parent B |
| 104 | $508 a month | Parent A pays Parent B |
| 128 | $356 a month | Parent A pays Parent B |
| 182 (about equal) | $14 a month | Parent A pays Parent B |
Low and high incomes in Idaho
For 2 children with Parent B earning $40,000, the guideline amount is about $247 a month when Parent A earns $20,000 a year and about $2,111 a month when Parent A earns $250,000.
Support should rarely be zero. Idaho presumes at least $50 a month per child, and when the paying parent earns under $800 a month the court reviews whether that parent can still meet basic needs.
The schedule covers combined Guidelines Income up to $440,000 a year. Above that the court decides any additional support case by case; this estimate shows the amount for the top of the schedule.
Child support by number of children in Idaho
- 1 child$515 a month
- 2 children$705 a month
- 3 children$770 a month
- 4 children$1,520 a month
- 5 children$1,718 a month
Parent A earns $60,000, Parent B $40,000; the children live mostly with Parent B.
Official sources and verification
- Law: Idaho Rules of Family Law Procedure, Rule 120 (Idaho Child Support Guidelines); Idaho Code § 32-706
- Idaho child support guidelines
- Standard Child Support Worksheet (I.R.F.L.P. Form 6) or Shared, Split, or Mixed Custody Child Support Worksheet (Form 7)
- Idaho Department of Health and Welfare, Child Support Services
- Changing a Idaho child support order
Guidelines effective July 1, 2025. Verified against the official Idaho sources on October 7, 2026. How we calculate →
Frequently asked questions
How is child support calculated in Idaho?
Idaho uses the income shares model. The schedule is a set of percentages of the parents' combined annual Guidelines Income, falling as income rises; each bracket's monthly amount is added up, and each parent is responsible for their share of combined income. Guidelines Income is gross income before taxes from almost any source, less support and maintenance paid under other orders, maintenance ordered in this case, and the guideline support for other children living with a parent. Child support received doesn't count.
What is the child support for one child in Idaho on $50,000?
If Parent A earns $50,000 a year, Parent B earns $40,000 and the child lives mostly with Parent B, Idaho's guideline amount for one child is about $449 a month (Parent A pays Parent B). Courts can deviate from the guideline amount.
Does 50/50 custody mean no child support in Idaho?
Not necessarily. With about equal parenting time, 2 children, Parent A earning $60,000 and Parent B $40,000, the guideline amount is about $14 a month (Parent A pays Parent B). When the children spend more than 25% of the overnights with each parent, the basic obligation is multiplied by 1.5, each parent's share is multiplied by the other parent's share of overnights, and the two are offset. No one pays more than they would without shared custody.
What is the minimum child support in Idaho?
Support should rarely be zero. Idaho presumes at least $50 a month per child, and when the paying parent earns under $800 a month the court reviews whether that parent can still meet basic needs.
When does child support end in Idaho?
Support normally ends at 18. If a child is still in high school after turning 18, a court may continue support until the child leaves high school or turns 19, whichever comes first. Idaho's guidelines don't provide support for education after high school. We didn't locate an official source on support for an adult child with a disability.