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Summit Federal Credit Union
August 7, 2026

Should you refinance your auto loan?

The math on replacing a dealership loan is simpler than it looks, and for many borrowers it is worth thousands.

A car buyer reviewing loan paperwork

Most people finance a car in the least favorable place possible, which is the dealership finance office at the end of a long Saturday. The rate you get there is often marked up above what the lender actually approved, because the dealer is allowed to keep part of the difference. That markup can be one or two percentage points, and it rides along for the whole term.

Refinancing means replacing that loan with a new one from a different lender. The car stays yours, the title moves, and your payment changes. It is a paperwork exercise, not a purchase.

When it is clearly worth doing

Look at your current rate first. If it starts with a 9 or higher and your credit has been steady since you signed, there is almost certainly room. Our new auto rate is 4.09% APR, and the gap between that and a 12% dealer loan is real money.

Here is the arithmetic on a common case. A $28,000 balance at 12% over 60 remaining months costs about $623 a month. The same balance at 4.09% over the same 60 months costs about $517. That is $106 a month and roughly $6,400 over the life of the loan, for one application.

The other clear case is a credit score that has improved. If you financed at 18% two years ago with a thin file and you have since paid everything on time, you are not the same borrower anymore. The old loan does not update itself. You have to go get the new rate.

When to leave it alone

If you are more than a percentage point underwater, meaning you owe considerably more than the car is worth, a refinance is harder to approve and less useful. Check a valuation guide before you apply so you know where you stand.

Watch out for stretching the term. Refinancing $18,000 from 36 months to 72 months will drop your payment a lot and cost you more in total interest, even at a better rate. If cash flow is genuinely tight that trade can be the right call, but make it on purpose rather than by accident.

Also check your existing loan for a prepayment penalty. They are uncommon on auto loans but not extinct, and a penalty can wipe out the first year of savings.

What the process looks like

You need your current lender's name, your account number, the payoff amount, the vehicle identification number, and proof of income and insurance. Applying takes about fifteen minutes. A decision usually comes the same day.

If it is approved, we pay off the old lender directly and the title is reassigned. You keep driving the same car and start making a smaller payment. There is no down payment and no trip to a dealership.

One practical tip: submit any rate shopping within a two-week window. Scoring models treat multiple auto inquiries in a short period as one shopping event, so comparing three lenders costs you about the same as comparing one.

This is a demonstration website; rates, products, and figures shown are illustrative only.

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