Idaho prejudgment interest rate
United States Idaho’s legal-rate reference for qualifying prejudgment claims.
→ All Idaho judgment & prejudgment interest rates
Fixed by statute
2026 Idaho prejudgment interest at a glance
- Current rate
- 12% per year
- Effective date
- July 9, 2026
- Controlling authority
- Idaho Code §28-22-104(1) (12% general); §12-301 / §28-22-104(2) (tort)
- Rate basis
- Fixed by statute
- Source checked
- July 9, 2026
- Recorded history
- 1 data point
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.
When Idaho prejudgment interest applies
The 12% legal-rate branch applies only to the obligations listed in §28-22-104(1), subject to a written rate. Whether a damages claim receives prejudgment interest depends on controlling Idaho authority and ascertainability. Section 12-301 can create a distinct settlement-offer consequence and must not be collapsed into the 12% headline.
When it starts accruing
Interest accrues from the date the money became "due" (for contract, the date of breach), provided that at that point the amount was liquidated or ascertainable by mathematical computation.
Simple or compound
The cited rate statute does not establish one universal compounding method for every prejudgment claim or settlement-offer branch. Confirm the controlling authority before calculating.
→ Compare with the Idaho post-judgment interest rate (interest after judgment)
Idaho general/contract prejudgment interest is 12% simple (Idaho Code §28-22-104(1)). SEPARATELY, in tort actions for personal injury, property damage, or wrongful death where the claimant serves an offer of settlement, prejudgment interest accrues at the §28-22-104(2) variable rate (currently 8.875%) under §12-301 — not the 12% general rate. Verified 2026-07-11. Not legal advice.
Current recorded observation
| Effective date | Rate | Basis |
|---|---|---|
| July 9, 2026 | 12% | Statute |
Source & provenance
Observation recorded July 9, 2026 (00:00 UTC) from the cited source (Idaho — legislature.idaho.gov):
https://legislature.idaho.gov/statutesrules/idstat/title28/t28ch22/sect28-22-104/
Cite this page
StatuteRates. “Idaho Prejudgment Interest Rate.” StatuteRates.com. Accessed today. https://statuterates.com/rates/idaho-prejudgment-rate/ Rate recorded under Idaho Code §28-22-104(1) (12% general); §12-301 / §28-22-104(2) (tort), effective July 9, 2026.