## Idaho interest rules

This source-backed guide covers US-ID interest authority (Idaho Code § 28-22-104). It certifies only the quoted source-backed rules below; related interest categories remain outside this page unless they are expressly listed in the receipt.

## Idaho Code § 28-22-104

US-ID interest controlling authority under Idaho Code § 28-22-104.

> **28-22-104.** ssion. Search Idaho Statutes Search Statutes Search Constitution pecnv.out TITLE 28 COMMERCIAL TRANSACTIONS CHAPTER 22 MONEY OF ACCOUNT AND INTEREST 28-22-104. Legal rate of interest. (1) When there is no express contract in writing fixing a different rate of interest, interest is allowed at the r

## Use the calculator

DocketMath's interest calculator can model interest scenarios once you identify the controlling jurisdiction, amount, rate type, and accrual date. Use the source panel for the verified source-backed rule.

[Open the Interest calculator](/tools/interest)

## Sources

- [28-22-104 — Idaho Code § 28-22-104](https://legislature.idaho.gov/statutesrules/idstat/title28/t28ch22/sect28-22-104/)

All sources are official primary law published by `legislature.idaho.gov`.

**Corroboration method:** government_primary_source_direct_fetch.


DocketMath’s Idaho Judgment Interest Calculator helps you compute interest on a money judgment using a clear, repeatable method and an audit-friendly br...

Judgment Interest Calculator Guide for Idaho

Major fabrication surgery: 8 distinct fabricated provisions removed across 6 claim_types. Restored statutory accuracy by anchoring to § 28-22-104(1) legal rate and § 28-22-104(2) judgment formula; flagged penalty/escrow/security-deposit as not_regulated rather than carrying false sub-rules.

Superseded by ANO-831 fabrication audit on 2026-04-24.

A civil action may be brought by a participant or beneficiary to recover benefits due to him under the terms of his plan, to enforce his rights under the terms of the plan, or to clarify his rights to future benefits under the terms of the plan.

The legal rate of interest on money due on the judgment of any competent court or tribunal shall be the base rate in effect at the time of entry of the judgment plus five percent (5%), computed annually. The base rate shall be determined on July 1 of each year by the Idaho state treasurer and shall be the weekly average yield on United States treasury securities as adjusted to a constant maturity of one (1) year and rounded up to the nearest one-eighth percent (1/8%).

When there is no express contract in writing fixing a different rate of interest, interest is allowed at the rate of twelve cents (12¢) on the hundred by the year on money due by express contract, money after the same becomes due, money lent, [and] money due on open accounts after three (3) months from the date of the last item.

Upon termination of the lease or rental agreement, all refundable deposits due the tenant shall be returned by the landlord, less any sums lawfully retained, within twenty-one (21) days after the surrender of the premises by the tenant. The parties may agree in writing to extend the period of return up to thirty (30) days.

When there is no express contract in writing fixing a different rate of interest, interest is allowed at the rate of twelve cents (12¢) on the hundred by the year on: 1. Money due by express contract. 2. Money after the same becomes due. 3. Money lent. 4. Money due on the judgment of any competent court or tribunal. 5. Money received to the use of another and retained beyond a reasonable time without the owner's consent, express or implied. 6. Money due on the settlement of mutual accounts from the date the balance is ascertained. 7. Money due upon open accounts after three (3) months from the date of the last item.

interest in US-ID is governed by Idaho Code § 28-22-104.