Idaho Child Support Calculator (2026)
In Idaho, child support is based on both parents' combined income and the number of children. The total is split between you based on how much each parent earns, and parenting time can change the amount. Use the free calculator below for an instant estimate.
Calculate Your Idaho Child Support
Free estimate — official Idaho guidelines
Include wages, salary, bonuses, and other income
How Much Is Child Support in Idaho?
If you make $60,000 a year in Idaho, child support for 1 child is estimated at $639 per month ($7,668 per year). This assumes the other parent earns approximately $36,000/year. Actual amounts depend on both parents' incomes, custody time, and add-on expenses (child care, health insurance).
$1,000/week ($52,000/year): approximately $588/month for 1 child.
Idaho Child Support Estimates by Income (2026)
| Annual Income | 1 Child | 2 Children | 3 Children |
|---|---|---|---|
| $40,000/yr | $489/mo | $728/mo | $854/mo |
| $50,000/yr | $573/mo | $849/mo | $1,000/mo |
| $60,000/yr | $639/mo | $945/mo | $1,121/mo |
| $70,000/yr | $687/mo | $1,018/mo | $1,219/mo |
| $80,000/yr | $729/mo | $1,085/mo | $1,311/mo |
| $100,000/yr | $812/mo | $1,219/mo | $1,495/mo |
| $120,000/yr | $896/mo | $1,352/mo | $1,678/mo |
Estimates assume the other parent earns 60% of your income. Actual amounts vary. Compare all states →
How Child Support Is Calculated in Idaho
Factors That Affect Child Support in Idaho
Technical details and legal basis
Idaho uses the Income Shares model (ID Guidelines (IRFLP 120, formerly IRCP 126)) to calculate child support. This model combines both parents' incomes to determine the total obligation, then divides it proportionally based on each parent's share.
Important Notes for Idaho
- • Idaho uses the Income Shares model, combining both parents' gross incomes to determine the total child support obligation.
- • Each parent's share is proportional to their percentage of the combined gross income.
- • Idaho considers additional expenses including health insurance, work-related child care, and extraordinary expenses for the children.
- • The court may deviate from the guidelines when strict application would produce an unjust result.
Example Calculation
Scenario: Parent A earns $5,000/month, Parent B earns $3,000/month, 2 children.
Step 1: Combined income: $8,000
Step 2: Parent A's share: $5,000 / $8,000 = 62.5%
Step 3: Look up basic obligation for $8,000 combined and 2 children.
Step 4: Multiply by Parent A's share (62.5%).
Adjustments for health insurance, child care, and parenting time may apply.
Key Facts: Child Support in Idaho
- Idaho uses the Income Shares model under IRFLP 120 (formerly IRCP 126), basing child support on both parents' combined gross income.
- The basic child support obligation for 1 child ranges from approximately $178/month at $1,000 combined income to $2,467/month at $36,667 combined monthly income (IRFLP 120, July 2025 amendment).
- Each parent pays their proportional share of the total obligation based on their percentage of the combined gross income.
- Idaho includes adjustments for health insurance, work-related child care costs, and extraordinary expenses.
- Courts may deviate from the guidelines when strict application would produce an unjust or inappropriate result.
Idaho Child Support FAQ
How is child support calculated in Idaho?
What income is used for Idaho child support?
Does shared custody affect child support in Idaho?
Can Idaho courts deviate from child support guidelines?
How long does child support last in Idaho?
About This Calculator
Uses the official ID Guidelines (IRFLP 120, formerly IRCP 126) (2025 guidelines). Last verified: 2026-05-31.
Disclaimer: Estimates only, not legal advice. Actual amounts are set by Idaho courts. Full disclaimer.
Methodology: Income Shares model per ID Guidelines (IRFLP 120, formerly IRCP 126).