State rules
Wisconsin auto loan rules
Wisconsin has 605 Census places covered on AutoLoanable, with a combined estimated population of 4,311,076. Vehicle financing in Wisconsin 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.
The lowest rates are only available to the most qualified applicants.
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Key rules for car buyers in Wisconsin
| Rule | Detail | Source |
|---|---|---|
| Maximum legal interest rate (usury cap) | 12% per year maximum ($12 per $100) on the declining principal balance, except as authorized by other statutes (Wis. Stat. § 138.05(1)(a)) Source says: At the rate of $12 upon $100 for one year computed upon the declining principal balance of the loan or forbearance |
Wisconsin State Legislature as of 2026-09-17 |
| Vehicle title loan status | Title loans are expressly authorized for licensed lenders holding a DFI certificate of authorization; principal may not exceed 50% of the vehicle's retail value, with no statutory interest limit before maturity (2.75% per month after maturity). Source says: "'Title loan' means a loan of $25,000 or less to a borrower ... secured by an interest, other than a purchase money security interest, in the borrower's motor vehicle, and that has an original term of not more than 6 months." License category: licensed lender (Wis. Stat. s. 138.09) with title loan certificate of authorization (s. 138.16(1m)). |
Wisconsin State Legislature — Wis. Stat. § 138.16 as of 2026-09-17 |
| Sales finance / installment lender licensing | Licensed lender license required from the Division of Banking (Wis. Stat. § 138.09) Source says: Before any person may do business under this section, that person shall first obtain a license from the division. No separate motor vehicle retail installment sales act; motor vehicle installment sales are governed by Wis. Stat. § 218.0142 (Installment sales) and the Wisconsin Consumer Act (Wis. Stat. § 218.0142; Wis. Stat. chs. 421-427). |
Wisconsin State Legislature as of 2026-09-17 |
| State lending regulator | Wisconsin Department of Financial Institutions (DFI), Division of Banking Source says: "Department" means the department of financial institutions |
Wisconsin State Legislature as of 2026-09-17 |
| Sales tax on vehicle purchases | 5% state rate; county rates of 0.5% (0.9% in Milwaukee County) and the city of Milwaukee's 2% city tax additional Source says: "The Wisconsin sales tax is a 5% tax imposed on the sales price of retailers..." |
Wisconsin Department of Revenue as of 2026-09-17 |
How to use these rules
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Check the ceiling before you compare offers
If a quoted APR looks extreme, compare it against the Wisconsin cap above — and note that a specific statutory exemption can apply to a particular product.
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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.
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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.
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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 Wisconsin
We cover 605 Census places in Wisconsin.