Should You Finance Through the Dealership or Your Own Bank/Credit Union?
For most buyers, getting pre-approved through a bank or credit union before visiting the dealership — then comparing that offer against the dealer's financing — is the strategy that produces the lowest total cost.
Dealer financing: Dealers work with a network of lenders and submit your application to multiple banks simultaneously. This is convenient, but dealers can mark up the interest rate above what the lender offered them (called "dealer reserve" or "rate markup") — often by 1–2% or more — and keep the difference as profit. On a $30,000 loan, a 1.5% rate markup costs you approximately $1,200–$1,500 over 60 months.
The exception: Manufacturer (captive) financing — such as Toyota Financial Services, Ford Motor Credit, or GM Financial — sometimes offers promotional rates (0% APR, 1.9% APR, etc.) that cannot be matched by outside lenders. These deals are real and worth taking when available.
Bank or credit union financing:
You negotiate directly with the lender — no dealer markup.
Credit unions in particular consistently offer the lowest auto loan rates of any lender type.
Pre-approval gives you a firm rate before you shop, so you negotiate from a position of strength.
The process requires more legwork: you apply before the dealership visit.
Best strategy:
Get pre-approved from your credit union or bank before visiting any dealership.
When at the dealership, show them your pre-approval rate and ask if they can beat it.
If the dealer offers a lower rate through manufacturer financing, take it — but watch for "menu items" (add-ons) in the finance office that can negate the savings.
Never let the conversation focus on monthly payment alone; always compare total APR and total amount financed.
