IDAHO SUPPORT GUIDELINE
Idaho child support calculator & worksheet
Idaho child support uses state-specific income definitions and guideline rules. A base child support worksheet is available with the scope and exclusions listed below. Use this guide to check income requirements, sources, and limits before completing your worksheet.
Current module status
| State | Idaho |
|---|---|
| Status | Active base worksheet module |
| Guideline model | income shares annual tranche |
| Primary income field | Combined annual Guidelines Income |
What the worksheet asks for
The calculator workflow starts with the selected state, then walks through both parties’ income, assets, debts, and state-specific particulars. Countable income streams feed each party’s formula income; balances and non-automated adjustments are disclosed separately. Common categories include wages, bonuses, dividends and interest, business or company income, self-employment adjustments, existing support obligations, debts assigned by order, health insurance, child care, tuition, extraordinary expenses, and parenting time.
Sources and limits
- Uses Idaho Rules of Family Law Procedure Rule 120, amended June 3, 2025 and effective July 1, 2025.
- Rule 120 bases the standard calculation on both parents’ annual Guidelines Income and applies marginal percentage rates by child count; the basic monthly obligation is divided between parents by Guidelines Income share.
- This module implements the ordinary primary-parenting-time base calculation where the paying parent has 25% or less of annual overnights.
- Shared physical custody over 25% overnights, split custody, tax-benefit adjustments, health insurance, child care, transportation, disability/retirement dependency benefits, other-child deductions and deviations require the full Idaho worksheet.
- For combined Guidelines Income above $440,000 per year, support on the first $440,000 is calculated under Rule 120 and any additional support is court-specific.
Official Idaho source used for review
Run the calculator
Open the free support calculator, select Idaho, complete the state worksheet, and print or export the output for review.
Frequently asked questions
Is this the official Idaho court calculator?
No. It is an independent educational estimate. Courts can order a different amount when the evidence, local rules, or statutory deviation factors justify it.
Can I use the output in court?
The worksheet output is designed to be clear and printable, but each litigant is responsible for checking local filing rules and attaching any required official court forms.