2026 Idaho judgment & prejudgment interest rates
Current 2026 snapshot: Idaho post-judgment interest is 8.875% per year; the recorded prejudgment reference is 12% per year.
Everything Idaho charges in interest on a money judgment or an overdue debt, in one place — the rate after judgment and the rate before it, each recorded with a cited source and linked to its full page with observations, scope, and known carve-outs.
| Metric | Rate or rule | Effective / reference date | Authority | Basis |
|---|---|---|---|---|
| Post-judgment interest | 8.875% | July 1, 2026 | Idaho Code § 28-22-104(2) | Statutory formula / table |
| Prejudgment interest | 12% | July 9, 2026 | Idaho Code §28-22-104(1) (12% general); §12-301 / §28-22-104(2) (tort) | Fixed by statute |
Post-judgment interest
Idaho's post-judgment interest rate is 8.875% per year. Idaho’s current post-judgment rate is 8.875%. Idaho Code §28-22-104(2) sets the rate at five percentage points above the State Treasurer’s one-year Treasury base rate in effect when judgment is entered. The Treasurer publishes one selection for each July-to-June fiscal year, and the dataset preserves all 41 published selections beginning with fiscal year 1987.
→ Full Idaho post-judgment page — Idaho Code § 28-22-104(2), effective-date history, scope, and official source.
Prejudgment interest
Idaho's prejudgment interest rate is 12% per year (fixed by statute). Idaho Code §28-22-104(1) supplies a 12% legal-rate branch for money due on qualifying instruments, accounts, loans, and retained money when no written rate controls. It does not itself establish a universal prejudgment award for every claim. Idaho Code §12-301 and the State Treasurer’s settlement-offer rate create a separate procedural branch.
→ Full Idaho prejudgment page — Idaho Code §28-22-104(1) (12% general); §12-301 / §28-22-104(2) (tort), when it applies, accrual, compounding, and carve-outs.
Frequently asked
What is the post-judgment interest rate in Idaho?
As of July 1, 2026, the Idaho post-judgment interest rate is 8.875% per year. Idaho’s official fiscal-year judgment rate and complete published history.
What is the prejudgment interest rate in Idaho?
Idaho's prejudgment interest rate is 12% per year (fixed by statute). The 12% branch covers listed obligations; claim entitlement and the separate settlement-offer branch require additional authority.
Is Idaho judgment interest simple or compound, and when does it start?
The official sources reviewed do not establish one universal compounding, day-count, or partial-payment method for every Idaho judgment. StatuteRates therefore publishes the verified rate history but keeps a payoff calculator disabled rather than assume those mechanics. The entry date selects the Treasurer’s July-to-June rate in force at that time. The current statute and decisions reviewed establish that selection rule, but a judgment’s precise accrual event and any special judgment treatment still must be checked against the controlling order and law.
Cite this page
StatuteRates. “Idaho Judgment & Prejudgment Interest Rates.” StatuteRates.com. Accessed today. https://statuterates.com/states/idaho/ Each rate includes a cited source and an effective or recorded-reference date; confirm the controlling authority before use.
Compare every state on the state interest-rate index and the prejudgment interest index, or enter a confirmed rate in the judgment interest and per-diem calculator. Reference data only — not legal advice.