What determines your car refinance rate

Your refinance rate depends on four things a lender checks: your credit score, the age and mileage of your car, how much you still owe compared to what the car is worth, and current market rates. A higher credit score usually means a lower rate. A newer car with lower mileage gets a better rate than an older one. If you owe less than the car is worth, lenders see less risk and offer better rates. Market rates change based on the Federal Reserve's decisions and what banks are charging each other — you cannot control this, but you can shop around to find which lender is offering the best rate that day.

The difference between a good rate and a poor one can cost you hundreds of dollars over the life of the loan. A 0.5% difference on a $20,000 loan over 60 months adds up to roughly $250 in extra interest. This is why comparing offers from multiple lenders before you refinance matters more than rushing to the first one.

Key Takeaways

  • Your credit score is the single biggest factor lenders use to set your rate — a score 100 points higher can lower your rate by 1% or more.
  • The age of your car and how much you owe on it affect your rate; lenders charge more for older vehicles and loans where you owe more than the car is worth.
  • Current market rates change weekly and vary by lender, so comparing offers from at least three lenders shows you the real range available to you.
  • Refinancing makes financial sense only if your new rate is at least 0.5% lower than your current rate and you plan to keep the car long enough to recoup any fees.

How your credit score shapes your rate

Lenders use your credit score as the primary signal of how likely you are to repay. Scores typically range from 300 to 850. A score above 750 usually qualifies you for the best rates available. A score between 650 and 750 gets you middle-range rates. Below 650, rates jump significantly higher because lenders see more risk.

The gap between tiers is real. A borrower with a 780 score might get 4.5%, while someone with a 680 score gets 7.2% from the same lender on the same day. Over five years, that 2.7% difference on a $20,000 loan costs about $1,400 more in interest. If your score has improved since you took out your original loan, refinancing becomes worth considering. If your score has dropped, refinancing will likely make your situation worse, not better.

You can check your own credit score for free through AnnualCreditReport.com, which is the official site for the three major credit bureaus. Checking your own score does not hurt your credit. When a lender checks your score to give you a rate quote, that is called a hard inquiry and does lower your score slightly — but multiple inquiries within 14 days usually count as one inquiry, so shopping around does not penalize you as much as it once did.

What lenders look at besides your credit score

Your car's age and mileage matter because they affect how much the car will be worth if you stop paying and the lender has to repossess and sell it. A 2022 car with 30,000 miles is worth more and depreciates slower than a 2015 car with 120,000 miles. Lenders charge higher rates for older, higher-mileage vehicles because the gap between what you owe and what the car is worth grows faster.

The loan-to-value ratio, or LTV, is the amount you owe divided by what the car is currently worth. If you owe $15,000 on a car worth $20,000, your LTV is 75%. If you owe $18,000 on that same car, your LTV is 90%. Lenders prefer an LTV below 80% and charge noticeably higher rates above 100% (when you owe more than the car is worth). You can lower your LTV by making a larger down payment toward the refinance, but most lenders do not allow this — they refinance the exact amount you still owe.

The length of your loan also affects your rate. A 36-month refinance usually has a lower rate than a 60-month one because the lender's money is at risk for less time. However, the monthly payment will be higher. A 72-month refinance might have a lower monthly payment but a higher rate and more total interest paid over the life of the loan.

How to compare rates from different lenders

Start by getting quotes from at least three lenders: your current bank or credit union, an online lender, and one traditional auto lender. Each will ask for your driver's license, Social Security number, current loan details, and vehicle information (VIN, mileage, current value). Provide the same information to each lender so the quotes are comparable.

When you receive a quote, look for the interest rate, the loan term (36, 48, 60, or 72 months), any origination or processing fees, and the total amount you will pay over the life of the loan. Some lenders advertise a low rate but charge $500 in fees; others charge no fees but a slightly higher rate. The annual percentage rate, or APR, includes both the interest rate and fees, so comparing APRs across lenders is more accurate than comparing rates alone.

Most lenders give you a rate quote that is good for 30 to 45 days. This means you can shop around without the quotes expiring before you decide. Write down the quote details from each lender, including the date, so you can refer back to them. Do not feel rushed to accept the first offer — the difference between the best and worst quote you receive might be 1% or more, which translates to real money.

When refinancing makes financial sense

Refinancing is worth doing if your new rate is at least 0.5% lower than your current rate and you plan to keep the car for at least two more years. The reason for the 0.5% threshold is that it usually takes six to twelve months of the lower payment to offset any fees the new lender charges. If you refinance and sell the car three months later, you lose money.

Calculate your break-even point by dividing any refinance fees by the monthly payment savings. If the new lender charges $300 in fees and your payment drops by $50 per month, you break even after six months. If your payment only drops by $20 per month, you need 15 months to break even. If you are not confident you will keep the car that long, refinancing is a gamble.

Refinancing also makes sense if you need to lower your monthly payment because your financial situation has changed. However, extending the loan term (going from 48 months to 60 months, for example) lowers the payment but increases the total interest you pay. You are trading a higher monthly cost later for a lower one now. Run the numbers both ways before you decide.

What happens after you refinance

Once you choose a lender and accept their offer, they will contact your current lender to find out the exact payoff amount. This amount might be slightly different from what you expected because it includes interest accrued up to the payoff date. The new lender pays off your old loan in full, and you now owe the new lender instead. Your car title remains with you — it does not change hands.

Your first payment to the new lender is usually due 30 to 45 days after the refinance closes. During that time, you may receive a bill from your old lender for the final payment; ignore it, because the new lender has already paid it off. If you receive collection notices or calls, contact the new lender when ready to confirm the payoff was processed. This is rare, but it happens when paperwork gets delayed.

After refinancing, your credit score will dip slightly because of the hard inquiry and the new account. This dip is temporary and usually recovers within a few months. Do not explore for new credit when ready after refinancing, because multiple inquiries in a short time can lower your score more significantly.

Frequently Asked Questions

Can I refinance a car I still owe a lot of money on?

Yes, but your rate will be higher if you owe more than the car is worth. Lenders are willing to refinance loans with high loan-to-value ratios, but they charge more interest to offset the risk. If you owe $22,000 on a car worth $20,000, expect rates to be 1% to 2% higher than someone in a better position.

What if I have bad credit — can I still refinance?

Yes, but you will pay a higher rate than someone with good credit. Some credit unions and online lenders work with borrowers whose credit scores are below 650. Your rate might be 8% to 10% instead of 4% to 6%, but refinancing can still lower your payment if your current rate is even higher. Compare offers before deciding.

Do I need to refinance with the same lender I borrowed from originally?

No. You can refinance with any bank, credit union, or online lender. Shopping around for the best rate is the whole point of refinancing. Your current lender has no advantage and often charges higher rates because they know you might not shop around.

How long does the refinance process take?

From process to funding usually takes five to ten business days. The lender will ask for documents, verify your information, order a vehicle inspection or valuation, and then fund the loan. Some online lenders are faster; traditional banks can take longer. Ask each lender for their timeline before you explore.

Will refinancing hurt my credit score?

Refinancing causes a small, temporary dip in your credit score because of the hard inquiry and the new account. The dip is usually 5 to 10 points and recovers within a few months as you make on-time payments. The long-term benefit of a lower rate and lower payment usually outweighs this temporary effect.