Should You Refinance Your Auto Loan?

Most people finance a car in the same hour they choose one, at a desk in the dealership, after a long afternoon. That is not a criticism, it is just how the process is built. But it means a lot of loans are written at a rate that was never really shopped. Refinancing is the second chance, and unlike a mortgage refinance it is cheap, fast, and does not involve an appraisal.

It is not automatically a good idea. Here is how to tell.

The three numbers that decide it

Pull your current loan statement and find your interest rate, your remaining balance, and the number of payments you have left. Then get a quote on a new loan for the same remaining term. If the new rate is lower and the term is the same or shorter, the refinance almost certainly saves money. If the new rate is lower but the term is longer, you may lower the monthly payment while paying more in total interest, which is a trade, not a win.

A rough rule: a rate improvement of one percentage point or more, with at least two years remaining, is usually worth doing. Below that, the savings may not justify the paperwork.

The break-even math

Auto refinances have far lower costs than mortgages, but they are not always free. Expect a title transfer or lien recording fee of roughly $15 to $85 depending on your state, and occasionally a small documentation fee. Break-even is simply that cost divided by your monthly savings.

Take a real-shaped example. You owe $19,400 with 42 months left at 9.24% APR, a payment of $543. Refinancing the same 42-month term at Summit's 5.49% APR for used vehicles drops the payment to about $505. That is $38 a month, or $1,596 over the life of the loan. With a $60 lien fee, you break even in under two months.

Notice the third row. Stretching to 60 months cuts the payment by $173, which is real relief if cash flow is tight, but costs about $990 more in interest than keeping the 42-month term. Both choices are defensible. Just make the one you meant to make.

When refinancing pays off

When it does not

If you have fewer than 18 months left, the interest remaining is small and the savings will not be worth the effort. If you are underwater, meaning you owe more than the vehicle is worth, most lenders will decline or require you to bring cash to close the gap. Very old or very high-mileage vehicles fall outside collateral guidelines; many lenders stop at 10 model years or 125,000 miles. And if your current loan carries a prepayment penalty, which is uncommon but not extinct, subtract it from your savings before deciding.

One more: if your credit has fallen since you bought the car, refinancing will likely produce a worse rate, not a better one. Check your score first.

How the process runs

Applying takes about ten minutes online and needs your driver's license, proof of income, the vehicle's VIN and mileage, and a payoff quote from your current lender. Most decisions come back the same day. If approved, Summit pays off the existing loan directly, files the new lien with your state, and sets your first payment date, usually 30 to 45 days out. You do not sign anything at a dealership and the car does not move.

The only thing to watch is the payment gap. If your old lender has already drafted this month's payment, you may briefly have two payments in one cycle or, more often, a month with none. Neither is a problem, but knowing which one you are getting keeps the budget honest.

Rates current as of July 2026 and subject to change. Membership eligibility required. This is a demonstration website; rates, products, and figures shown are illustrative only.