Dealer Interest Rate Markup Explained: Buy Rate vs Your APR

Dealer interest rate markup is the gap between the rate a lender approved you for, called the buy rate, and the higher rate the dealer writes into your contract. The lender then shares part of that extra interest with the dealer as compensation, often called dealer reserve. It is legal and common, and it is negotiable, which is why walking in with your own preapproval is the simplest defense.

How the buy rate and markup work

When you finance through a dealer, the dealer sends your application to one or more lenders. Each lender that wants the deal returns a risk-based buy rate, the minimum rate it will accept. The Consumer Financial Protection Bureau explains in its guide to negotiating a dealer rate that the dealer may then offer you a rate above the buy rate, and that this rate is negotiable. In the CFPB's 2013 indirect auto lending bulletin, the agency describes the lender paying the dealer "reserve" or "participation" based on the difference between the buy rate and the contract rate.

How much markup can cost

A couple of points sounds small and is not. Take a $20,000 used car loan for 60 months. At 7% APR the payment is about $396 and total interest is about $3,760. At 9% the payment is about $415 and total interest is about $4,910. That 2-point markup costs about $1,150 over the loan. Lenders often cap how much a dealer can add; in a 2015 settlement described by the CFPB, Honda agreed to cut its dealer markup cap from as much as 2.25 points to 1.25 points on shorter loans. Caps vary by lender and are not printed on your contract.

How to tell if your rate was marked up

You usually cannot see the buy rate, and the dealer is not required to tell you. You can still compare. Get a preapproval from a bank or credit union before you shop; the CFPB's auto loan tools walk through how. If the dealer's rate is higher than your preapproval for the same term and amount, ask them to beat it or use your own financing. A dealer offer that comes in lower is great; take it, as long as the price and add-ons did not change to pay for it.

Watch the other places the money moves

Markup is one lever. The others are the vehicle price, your trade-in value, and add-ons like service contracts, GAP and etching. A dealer that drops your rate may raise the price or slide in a product. Compare the total amount financed and the total of payments on the retail installment contract, not just the monthly payment. Read every page before signing, and ask what each line is.

Be careful with spot delivery too. If you drive home before financing is final and the dealer later calls saying the deal "fell through" at a higher rate, read our guide on yo-yo financing and spot delivery before you sign anything new. And check whether your contract has an early payoff charge; our car loan prepayment penalty guide covers what to look for if you plan to refinance out of a high rate later.

Fair lending and markup

Markup has drawn regulator attention because dealer discretion can lead to different rates for similar borrowers. The CFPB's 2013 bulletin warned indirect lenders that discretionary markup policies create fair lending risk under the Equal Credit Opportunity Act. If you think you were charged more because of race, national origin, sex, age or another protected trait, you can file a complaint with the CFPB. The CFPB and DOJ resolution with Honda is a public example of how regulators handled markup discretion.

A practical sequence

• Get a preapproval with a rate, term and maximum amount before you visit a dealer.
• Agree on the out-the-door price before you talk about financing.
• Let the dealer try to beat your preapproval, and compare APR, term and amount financed side by side.
• Decline add-ons you do not want, in writing if needed.
• Pull a history report on the car before you sign, so you are not financing a problem.

Lenders and credit unions often check the car too. If the car turns out to have a branded title, many lenders will not finance it at normal terms; our credit union salvage title loan guide covers that case.

Report cost

As of early November 2026 one CARFAX bought direct costs about $44.99. We are a licensed CARFAX and AutoCheck reseller, not affiliated with CARFAX, AutoCheck or Experian; guest pricing has been about $5.50 a report, lower for members and bundles. Confirm at checkout. Title brands can also be checked in NMVTIS before you finance.

Sources

• CFPB: Can I negotiate a car loan interest rate with the dealer?
• CFPB Bulletin 2013-02, Indirect Auto Lending and ECOA
• CFPB and DOJ resolution with Honda on dealer markup
• National Motor Vehicle Title Information System
• Payment math: standard amortization, $20,000 for 60 months, figures rounded