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State rules

Idaho auto loan rules

Idaho has 197 Census places covered on AutoLoanable, with a combined estimated population of 1,397,443. Vehicle financing in Idaho is governed by state law — the interest-rate caps, title-lending rules, sales-finance licensing and the regulator that oversees them. The sourced figures below apply to every car loan made to a borrower in the state.

By the AutoLoanable Editorial Team · Last updated 2026-09-17

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12% cap state usury cap
6% statewide state vehicle sales tax
Permitted vehicle title loans
IDOF state regulator

Key rules for car buyers in Idaho

RuleDetailSource
Maximum legal interest rate (usury cap) 12% per annum legal rate (when no written contract fixes a different rate)
Source says: "interest is allowed at the rate of twelve cents (12¢) on the hundred by the year".		 Idaho State Legislature
as of 2026-09-17
Vehicle title loan status Title loans are authorized and licensed under the Idaho Title Loan Act; the Idaho Credit Code sets no rate cap — the finance charge is the rate agreed by the parties — and a regulated lender license is required.
Source says: "No person shall engage in the business of making title loans without having first obtained a license from the administrator pursuant to this chapter authorizing the person to make regulated consumer loans." License category: Regulated lender license (Idaho Credit Code).		 Idaho State Legislature — Idaho Code § 28-46-503
as of 2026-09-17
Sales finance / installment lender licensing Regulated Lenders License required (regulated consumer loans)
Source says: "unless a person is exempt ... he shall not engage in the business of: (a) Making regulated consumer loans". No separate motor-vehicle sales finance act — motor vehicle retail installment sales are regulated credit sales under the Idaho Credit Code (rate as agreed by the parties) (Idaho Code §§ 28-41-301(36), 28-42-201).		 Idaho State Legislature
as of 2026-09-17
State lending regulator Idaho Department of Finance (IDOF)
Source says: "Safeguarding the financial health of Idahoans through the appropriate oversight of diverse financial institutions, the education and protection of consumers".		 Idaho Department of Finance
as of 2026-09-17
Sales tax on vehicle purchases 6% state rate.
Source says: "Idaho's sales tax rate is 6%. Idaho's use tax rate is also 6%."		 Idaho State Tax Commission
as of 2026-09-17

How to use these rules

  1. Check the ceiling before you compare offers

    If a quoted APR looks extreme, compare it against the Idaho cap above — and note that a specific statutory exemption can apply to a particular product.

  2. Verify the lender is licensed

    Use the regulator named in the table to confirm the lender or sales-finance company may legally serve borrowers in the state.

  3. Know what is secured against your car

    A vehicle title loan is secured by the car itself. If the state permits it, understand the repossession terms before you sign anything.

  4. Budget for tax and fees separately

    Sales tax and title fees are financed along with the car, so they raise the amount you borrow — and therefore the interest you pay on them.

Cities in Idaho

We cover 197 Census places in Idaho.

Frequently asked questions

What interest rate can a lender charge on a car loan in Idaho?
It depends on the product and the statute that governs it. The sourced table on this page lists Idaho's usury cap, its motor-vehicle sales-finance rules and the licensing requirements, each with its publisher and a link to the primary source.
Are title loans legal in Idaho?
Vehicle title lending is regulated state by state; some states permit it under a licensed lender, some cap it, and some prohibit it outright. See the sourced figure on this page for the current position, and confirm it with the state regulator before you sign anything.
Do I need a license to finance a car in Idaho?
Most consumer lenders and motor-vehicle sales-finance companies must be licensed by the state regulator named on this page. You can verify a lender's licence with that regulator before you sign anything.

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