The short answer
Get pre-approved by a bank or credit union first, then let the dealer try to beat that rate. Dealers can add a markup — the CFPB has documented discretionary dealer reserve of up to about 2 percentage points — on the lender's rate. Use dealer financing only when it genuinely undercuts your pre-approval.
What is dealer financing and how does it work?
Dealer financing is indirect lending: the dealer collects your application, sends it to partner lenders, and presents you a rate that can include a markup over the lender's "buy rate." That markup — called dealer reserve — commonly runs up to about 2 percentage points. The dealer arranges the loan, but a third-party bank or finance company actually holds it.
The mechanics matter because the rate you see is not always the rate the lender approved. The Consumer Financial Protection Bureau has documented that dealers often have discretion to raise the lender's buy rate and keep part of the difference as compensation. That convenience can cost you, which is why an outside offer is your reference point.
- You apply once at the dealer; they shop your application to multiple lenders.
- The lender returns a buy rate; the dealer may mark it up before quoting you.
- The dealer keeps part of the markup (dealer reserve) as profit on the loan.
- You repay a third-party lender, not the dealership, over the loan term.
What are the advantages of getting pre-approved through a bank or credit union?
Pre-approval gives you a firm rate and loan amount before you ever talk price, which turns you into a cash buyer in the dealer's eyes. Credit-union auto rates consistently run below the bank average in NCUA data, and a pre-approval sets a ceiling: the dealer must beat your locked rate to win the loan, or you simply use your own.
- A rate to beat. Your pre-approval is the number the dealer's finance office has to undercut, removing the markup guesswork.
- Lower rates from credit unions. NCUA quarterly data shows credit-union auto loan rates typically below comparable bank offers.
- Separated negotiations. With financing settled, you negotiate the car price on its own — see how to negotiate car price.
- Protection from games. A locked outside loan shields you from yo-yo financing and last-minute rate changes.
Shopping several lenders in a short window counts as a single credit inquiry, so comparing a bank, a credit union, and an online lender before you shop costs little. Pair pre-approval with a strong down payment to cut the amount financed.
When does dealer financing actually beat a bank loan?
Dealer financing wins when the manufacturer subsidizes the rate — promotional 0% or 1.9% APR offers undercut any bank. These captive-lender deals typically require excellent credit, around 720 or higher, and may force you to forgo a cash-back rebate. Convenience and same-day approval can also tip the balance for buyers who can't easily pre-qualify elsewhere.
- Subsidized promotional APRs. Manufacturer 0%–1.9% deals through the brand's captive lender beat market rates, but usually need a 720+ score.
- Rebate trade-off. 0% financing often means giving up cash back; run both paths before choosing — see what a good APR is.
- Speed and convenience. One application, same-day approval, no separate lender trip.
- Special programs. First-time buyer or recent-graduate incentives can be dealer-exclusive.
Even then, bring your pre-approval. If the dealer's promotional rate is real, it will easily beat your bank offer; if it quietly isn't, your own loan is the safer choice. The point of an outside offer is to make the comparison honest.
How do you compare dealer and bank offers side by side?
Compare total interest paid over the full term, not the monthly payment. A lower payment often just means a longer term, so a "cheaper" dealer offer can cost more overall. Line up APR, term, and total finance charge for each offer on the same loan amount, and the true cost of any markup becomes obvious.
| Offer ($35,000, 60 months) | APR | Monthly payment | Total interest |
|---|---|---|---|
| Credit-union pre-approval | 6.0% | $677 | ≈ $5,600 |
| Dealer rate, no markup | 6.5% | $685 | ≈ $6,100 |
| Dealer rate, 2-point markup | 8.0% | $710 | ≈ $7,600 |
The two-point markup adds roughly $2,000 in interest on the same car — money the lower payment can hide. Always ask for the APR and the total finance charge in writing, both of which lenders must disclose under the federal Truth in Lending Act, and judge offers on that total.
What should you watch out for with dealer financing?
Watch for three things: rate markup, payment packing, and yo-yo financing. Markup inflates your APR above the lender's buy rate; payment packing buries add-ons like service contracts and gap insurance into the monthly payment; and yo-yo financing pulls you back after delivery to re-sign at a worse rate. A locked outside loan neutralizes all three.
- Rate markup. Ask whether the rate includes dealer reserve, and compare it to your pre-approval before signing.
- Payment packing. Insist on the price of each add-on separately; don't shop by monthly payment, which hides them.
- Yo-yo financing. Don't sign a "conditional" delivery — wait until financing is fully approved, or use your own loan.
- Stretched terms. A 72- or 84-month term lowers the payment but raises total interest and the risk of going upside down — review your options if your credit is thin.
The CFPB's auto-loan resources spell out these tactics. Read the contract line by line, confirm the APR and total finance charge match what you were quoted, and never let the conversation collapse into a single monthly number.
Frequently asked questions
Is it better to finance through the dealer or a bank?
It is usually better to get pre-approved by a bank or credit union first, then let the dealer try to beat that rate. Dealers earn a markup on the loans they arrange, so their first offer is often higher than what a lender would quote you directly. Sign with the dealer only if it genuinely undercuts your pre-approval.
What is a dealer reserve or dealer markup on a car loan?
Dealer reserve is the extra interest a dealer adds on top of the lender's buy rate as compensation for arranging the loan. The CFPB has documented that this discretionary markup commonly runs up to about 2 percentage points. On a $35,000, 60-month loan, two points of markup can add roughly $1,900 in interest.
Do credit unions offer better car loan rates than dealers?
Often, yes. NCUA data consistently shows credit-union auto loan rates running below the bank average, and a not-for-profit credit union has no incentive to mark up the rate the way an indirect dealer arrangement can. Membership is usually easy to qualify for, and pre-approval lets you walk into the dealer with a rate to beat.
Is dealer 0% financing actually a good deal?
It can be, but it usually requires excellent credit, around 720 or higher, and often forces you to give up a cash-back rebate. Run both offers: a cash rebate plus a low outside loan sometimes costs less overall than 0% with no rebate. Compare the total amount paid, not just the headline rate.
What is yo-yo financing at a dealership?
Yo-yo financing is when a dealer lets you drive off before financing is finalized, then calls you back days later claiming the loan fell through and you must re-sign at a higher rate. Securing your own bank or credit-union loan before signing avoids the trap entirely, because your financing is already locked in.
Sources
CarsLens is editorial guidance, not individualized financial advice. This page draws on the Consumer Financial Protection Bureau, NCUA, and Experian.