📊 Idaho · Percentage of Income · 2026

Idaho Child Support Calculator 2026

Free estimate using Idaho's official Percentage of Income formula. No signup required.

Calculate Child Support

Before taxes. Include wages, self-employment, bonuses.
0 = no custody ¡ 91 = 25% ¡ 182 = 50/50 ¡ 365 = full custody
$0
estimated monthly support payment
âš ī¸ Estimate only. Actual court-ordered amounts may vary. Verify with a licensed Idaho family law attorney.
â„šī¸ Idaho uses the Percentage of Income — Idaho uses a percentage of the non-custodial parent's gross income.

How Child Support Works in Idaho

Idaho uses the Percentage of Income to determine child support obligations.

The Percentage of Income model applies a fixed percentage of the non-custodial parent's income based on the number of children. Rates: 1 child = 20%, 2 = 22%, 3 = 24%, 4 = 26%, 5+ = 28%.

Frequently Asked Questions

How is child support calculated in Idaho?
Idaho uses the Percentage of Income model. Idaho uses a percentage of the non-custodial parent's gross income.
When does child support end in Idaho?
Child support generally ends when the child turns 18 in Idaho.
Can I modify child support in Idaho?
Yes. Idaho requires a 15% or greater change in income to qualify. Use our modification checker →
Does 50/50 custody eliminate child support in Idaho?
Not automatically. The higher-earning parent typically still pays support with 50/50 custody. See our 50/50 guide →
What income is used for child support in Idaho?
Income includes wages, self-employment, bonuses, rental income, unemployment benefits, disability payments, and Social Security. Courts may impute income if a parent is voluntarily underemployed.