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Dealer Financing vs. Bank or Credit Union
When you buy a car, you can finance through the dealer or bring your own loan from a bank or credit union. Each has trade-offs — and the difference can cost or save you a lot. Here's how to compare.
→ Try the free loan payoff calculatorThe dealer arranges your loan through their lender network. It's convenient — one-stop shopping — and dealers sometimes offer genuine manufacturer promotions like 0% APR on new cars. But dealers often mark up the rate above what you'd qualify for, keeping the difference as profit.
How bank/credit union loans work
You get pre-approved directly from a bank or credit union, then use that loan to buy the car. Credit unions in particular are known for low auto rates and member-friendly terms. The trade-off is slightly more legwork upfront.
Side by side
| Dealer financing | Bank / credit union | |
|---|---|---|
| Convenience | High (one stop) | Requires pre-approval |
| Rate | Possible markup — or 0% promos | Often lower, transparent |
| Best for | Manufacturer 0% deals | Most buyers, used cars |
The smart play: do both
Get pre-approved from a bank or credit union first, then let the dealer try to beat your rate. If they can (or there's a genuine 0% promo), take theirs; if not, use your pre-approval. You win either way.
Watch the add-ons
Dealer finance offices also push extended warranties, GAP, and other products. Evaluate each separately and don't let a "low payment" hide a marked-up rate or padded extras.
Why credit unions often win on rate
Credit unions are member-owned nonprofits, so they tend to return value to members through lower loan rates and friendlier terms than banks or marked-up dealer financing. If you're not already a member, many are easy to join. For used cars especially, a credit union pre-approval is frequently the rate to beat — and it gives you a concrete benchmark before you ever talk numbers with a dealer.
When dealer financing actually wins
Dealer financing isn't always worse. Manufacturers sometimes offer genuine promotional rates — even 0% APR — on new cars to move inventory, which no bank can match. The catch is these often require excellent credit and may be an either/or against a cash rebate. So compare the 0% offer (with no rebate) against your pre-approved rate (with the rebate) to see which truly costs less. The smart play is always to get pre-approved first, then let the dealer try to beat it.
Frequently asked questions
Is it better to finance through a dealer or a bank?
Get pre-approved from a bank or credit union first, then let the dealer try to beat that rate. Credit unions are often cheapest, but dealers occasionally offer unbeatable 0% manufacturer promos — making them compete guarantees the best deal.
Why is dealer financing sometimes more expensive?
Dealers often mark up the interest rate above what you'd qualify for and keep the difference as profit. They may also focus you on the monthly payment while extending the term, hiding a higher rate.
→ Try the free loan payoff calculatorThe bottom line
Dealer financing is convenient and occasionally unbeatable (0% promos), but often marked up. A bank or credit union is usually cheaper and more transparent. Get pre-approved, then make the dealer compete — that's how you guarantee the lowest rate.
Related: How to get pre-approved · What's a good car loan rate?