Post-judgment interest by state · Idaho
Idaho · after judgment
Post-judgment interest in Idaho
An unpaid Idaho money judgment earns 8.875% a year unless the judgment or a contract says otherwise. On a $5,000.00 judgment that is $443.75 in the first year, about $1.22 a day.
How the rate is set
5% plus the weekly average 1-year Treasury constant-maturity yield, rounded up to the nearest one-eighth percent, set by the State Treasurer each July 1. The rate in effect when a judgment is entered applies for the life of that judgment.
- Statute or rule
- Idaho Code §28-22-104(2)
- Published by
- Idaho State Treasurer, Legal Rate of Interest
- Figure read on 2026-10-23
- 8.875%
- Statute re-checked
- 2026-10-23
- Changes
- FY2027 (July 1, 2026 to June 30, 2027)
When a different rate applies
- A written contract's rate governs.
Work out your own judgment
Idaho is prefilled at 8.875%. Enter the amount and the date the judgment was entered. The calculator uses simple interest; that is how this rate accrues.
How Idaho's rate is set, and where it comes from
Uses simple interest at the rate you enter — pre-filled with each state's standard statutory rate, editable since some states publish a new rate quarterly or annually. Some states apply a different rate to specific debt types (noted above where it applies) or when a contract specifies its own rate. Informational only, not legal advice; confirm the current rate and any exceptions with your court clerk before relying on this figure.
The formula, worked
Last reviewed: October 2026
Interest = principal × rate × days ÷ 365. For $5,000.00 at 8.875%: $5,000.00 × 0.08875 × 365 ÷ 365 = $443.75 after one year, and $1.22 for each further day.
What this page does not know
- The rate written on your judgment. If the court stated a rate, that one applies, whatever the default is today.
- Partial payments. Interest accrues only on what is still unpaid.
- Nothing about older judgments: Idaho fixes the rate when the judgment is entered, so a judgment from an earlier period keeps that period's rate, not the one shown.
Informational only, not legal advice. Every figure is cited to the statute or the office that publishes it; confirm the current rate with the court clerk before relying on it.
Frequently asked questions
What is the post-judgment interest rate in Idaho right now?
8.875% a year for an ordinary money judgment, for FY2027 (July 1, 2026 to June 30, 2027), under Idaho Code §28-22-104(2).
How is the Idaho rate set?
5% plus the weekly average 1-year Treasury constant-maturity yield, rounded up to the nearest one-eighth percent, set by the State Treasurer each July 1. The rate in effect when a judgment is entered applies for the life of that judgment.
Is it simple or compound interest?
Simple interest: it is calculated on the original judgment amount only and never on earlier interest.
Can my Idaho judgment carry a different rate?
Yes. A written contract's rate governs. The judgment itself may also state a rate, and that controls.
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