By MyAutoResource Editorial Team · Reviewed by Steven Sun · 5 min read · Updated August 13, 2026
- Experian puts the average used-car loan APR at 11.43%, versus 21.77% for the deepest subprime credit tier, a spread worth checking against your current rate.
- On a $27,000, 60-month loan, dropping from 21.77% to 11.43% cuts the payment from about $742 to $593 a month and saves roughly $8,960 in total interest.
- Your loan-to-value ratio, not just your credit score, decides whether a lender will approve a refinance at all.
- The Federal Reserve’s G.19 report puts the average bank rate for a 60-month new-car loan at 7.14%, a useful floor for judging whether a refinance offer is actually competitive.
Maria financed a used Honda Civic for $27,000 two years ago through a buy-here dealer. Her paperwork listed an APR of 21.77 percent because her credit score sat in the low 500s at the time. Today her score is closer to 690. She still owes about $24,000, her rate hasn’t moved, and she just got a refinance offer in the mail. The question isn’t whether refinancing sounds good. It’s whether the math actually works once fees, timing, and the fine print are accounted for.
What refinancing actually changes
Refinancing an auto loan means a new lender pays off your existing loan and issues you a new one, ideally at a lower APR (annual percentage rate, the yearly cost of borrowing including most fees). Your monthly payment can drop, your total interest can drop, or both, depending on the new rate and the new term length. But a longer term can lower your payment while raising your total interest paid, even at a better rate. That trade-off is the first thing to check, not the payment number alone.
The credit tier you fall into drives almost everything about the offer you’ll see. Experian’s most recent State of the Automotive Finance Market report puts the average used-car loan APR at 11.43 percent overall. Borrowers in the top credit tier average 6.30 percent, and borrowers in the deepest subprime tier average 21.77 percent, the same range Maria’s original loan fell into. A two-tier credit improvement can be worth more than a bigger down payment would have been.
Loan-to-value ratio decides who qualifies at all
Before a lender quotes you a rate, they check your loan-to-value ratio, or LTV, which is your loan balance divided by what the car is actually worth right now. A used car depreciates faster than most loan balances shrink in the first year or two. It’s common to owe more relative to the car’s value than you did on day one, even after a year of on-time payments. If your LTV is above roughly 125 to 130 percent, most refinance lenders will decline the application outright. Others will price it as if you were still in your original credit tier, regardless of how much your score has improved. Pull your car’s current trade-in value before you apply, not after a lender tells you no, so you know which side of that line you’re on.
The break-even math most people skip
Run the numbers before you sign anything. On Maria’s $27,000 balance over a 60-month term, her original rate of 21.77 percent works out to a payment near $742 a month and roughly $17,531 in total interest over the life of the loan. Refinancing into a rate closer to the current used-car average of 11.43 percent drops that payment to about $593 a month, with total interest near $8,571. That’s a monthly savings of about $149 and a lifetime interest savings near $8,960, assuming she refinances the full remaining balance and keeps the same 60-month clock running.
That gap is the number that matters, not the advertised rate on a postcard. But it assumes you’re comparing full terms fairly. If Maria is 18 months into her original loan and refinances into a fresh 60-month term, she resets the clock. She’s now stretching payments on a car that’s two years older, which can wipe out some of the savings in total dollars even while the monthly payment drops. Ask any lender to quote you a term that matches your remaining payoff timeline, not just their standard offer.
Five questions worth asking before you refinance
Ask what the total finance charge is over the full term, not just the monthly payment. A lower payment stretched over more months can cost more in total interest than staying put.
Ask whether there’s a prepayment penalty on your current loan. Most auto loans don’t carry one, but dealer-arranged financing sometimes does, and it changes the payoff math.
Ask what fees the new lender charges to originate the refinance. Auto refinancing is typically far cheaper than a mortgage refinance, often limited to a modest title and processing fee rather than points or an appraisal. “Typically cheap” isn’t the same as free, so get the number in writing.
Ask how the new loan reports to the credit bureaus during the transition. A new inquiry and a new account can dip your score briefly, which matters if you’re about to apply for other credit.
Ask your current lender directly what rate they’d offer to keep you, before you commit elsewhere. Some lenders will match or beat a competing offer just to avoid losing the account, and that conversation costs you nothing.
Ask what your loan-to-value ratio looks like on paper, and whether it’s the reason you were quoted a specific rate. If a lender treats you as a higher-risk borrower despite a real credit improvement, a high LTV is usually why, and it’s worth asking them to show their math.
When refinancing isn’t the answer
If your loan is nearly paid off, the interest savings on a refinance rarely justify resetting the clock. If your credit hasn’t actually improved since you took out the loan, a new lender is unlikely to beat your current rate no matter how the mailer is worded. And if you’re underwater, owing more than the car is worth, refinancing without addressing that gap first just moves the same problem to a new lender. In any of those cases, a direct conversation with your current lender about a loan modification, rather than a full refinance, is usually the faster and cheaper path. A modification adjusts the terms of your existing loan instead of replacing it. That sidesteps the new-inquiry credit dip and skips the title-transfer paperwork entirely, though it also means you’re negotiating with a lender that has less incentive to compete for your business.
The Federal Reserve’s G.19 report on consumer credit terms shows the average bank rate for a 60-month new-car loan easing to 7.14 percent in its most recent reading, down from 7.53 percent the quarter before. That’s a useful floor to compare against. If a refinance offer for a borrower with solid credit lands more than two or three points above that bank average, call your own bank or credit union before signing anything a mailer sent you.
Frequently asked questions
What’s a good reason to refinance an auto loan?
A real credit-tier improvement since you took out the original loan, or a meaningful drop in market rates, are the two strongest reasons. If neither has changed, a new lender is unlikely to beat the rate you already have.
Does refinancing hurt my credit score?
It can cause a small, temporary dip from the new inquiry and the new account, but the effect is typically minor and short-lived compared to the interest savings from a genuinely lower rate.
How much does it cost to refinance a car loan?
Auto refinancing is generally far cheaper than refinancing a mortgage, usually limited to modest title and processing fees rather than points or an appraisal. Get the exact fee schedule in writing before you commit.
What if I owe more than my car is worth?
A high loan-to-value ratio can get a refinance application declined or priced as if your credit hadn’t improved at all. Check your car’s current trade-in value before you apply so you know where you stand.
Should I refinance with my current lender or a new one?
Ask your current lender what they’d offer to keep your business before applying elsewhere. It costs nothing to ask, and some lenders will match a competing rate rather than lose the account.
