How auto refinance rates work
An auto refinance rate is the interest percentage a lender charges when you borrow money to pay off your existing car loan. The rate determines how much extra you pay beyond the principal — the amount you actually borrowed. A lower rate means less money out of your pocket over the life of the loan; a higher rate means more.
When you refinance, you're replacing one loan with another. The new lender pays off the old loan in full, and you start making payments to the new lender instead. The rate the new lender offers depends on what they think the risk is of lending to you, what the broader lending market looks like at that moment, and the terms you choose — how long you want to take to repay, for example.
Rates vary widely. You might see offers ranging from around 4% to 12% or higher, depending on your credit score, the age and mileage of your vehicle, how much you still owe, and current market conditions. The same person can receive different rate offers from different lenders on the same day.
Key Takeaways
- Your credit score is the single biggest factor lenders use to set your rate — a higher score typically means a lower rate.
- The age, mileage, and condition of your car affect the rate because older vehicles are riskier collateral for lenders.
- How much you still owe compared to what the car is worth (called loan-to-value) influences the rate a lender will offer.
- Rates change daily based on market conditions, so comparing offers from multiple lenders within a short window gives you the clearest picture of what's available.
- The loan term you choose — 36 months, 60 months, 72 months — affects both your rate and your monthly payment.
What determines your refinance rate
Credit score is the primary driver. Lenders pull your credit report to see your payment history, how much debt you're carrying, and how long you've had credit accounts open. A score above 700 typically unlocks better rates than a score below 650. The difference can be 2 to 4 percentage points or more between the highest and lowest offers you receive.
Vehicle age and mileage matter because they affect how much the car is worth and how likely it is to need expensive repairs. A 2022 car with 30,000 miles is easier to refinance at a good rate than a 2015 car with 120,000 miles. Some lenders won't refinance vehicles older than 10 years or with more than 150,000 miles, regardless of your credit score.
Loan-to-value ratio (LTV) is what you still 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 lower LTVs because they have more cushion if they have to repossess and sell the vehicle. A higher LTV often means a higher rate or a denial.
Current market conditions affect all rates. When the Federal Reserve raises its benchmark interest rate, auto refinance rates typically rise across the board. When rates fall, lenders compete more aggressively and offer lower rates. This is why the same lender might offer you 5.5% one month and 6.2% the next.
How to compare rates from different lenders
Get rate quotes from at least three to five lenders within a two-week window. Most lenders offer a soft inquiry first — a quick rate estimate that doesn't affect your credit score. This lets you shop without damage to your credit report.
When you're ready to move forward with a lender, they'll do a hard inquiry, which does show up on your credit report. Multiple hard inquiries within 14 to 45 days (depending on the credit scoring model) typically count as a single inquiry, so shopping around doesn't tank your score if you do it quickly.
Write down the rate, the loan term (36, 48, 60, 72 months), the monthly payment, and any fees each lender quotes. Don't compare just the rate — a lower rate over 72 months might mean a higher total interest cost than a slightly higher rate over 48 months. Use an auto loan calculator to see the total amount you'll pay with each offer.
Banks, credit unions, online lenders, and your current auto lender all refinance loans. Credit unions often offer lower rates to members, but you have to be a member first. Online lenders approve quickly but may charge origination fees. Your current lender knows your payment history and may offer a competitive rate to keep your business.
Rate differences between loan terms
Shorter loan terms usually come with lower rates. A 36-month refinance might be offered at 5.2%, while a 72-month refinance from the same lender might be 6.1%. The lender is taking on more risk the longer the loan runs — more time for you to miss a payment or for the car to lose value.
The trade-off is your monthly payment. A shorter term means higher monthly payments but less total interest paid. A longer term spreads the payments out, making them smaller each month, but you pay more interest overall. If your goal is to lower your monthly payment, a longer term gets you there, but you'll pay more in the end. If your goal is to pay off the loan faster and save on interest, a shorter term is the better choice even if the rate is the same.
Some people refinance into a longer term to free up monthly cash flow, then pay extra toward the principal when they can. This strategy works if you have the discipline to actually make those extra payments — otherwise you end up paying more interest than you would have with the original loan.
When refinance rates make sense
Refinancing makes financial sense when the new rate is at least 1 to 2 percentage points lower than your current rate. If you're paying 8% and can refinance at 6%, the savings add up quickly. If you're paying 6% and can only get 5.5%, the savings are smaller and might not be worth the time and fees involved.
The amount you still owe also matters. Refinancing a $5,000 balance saves less money than refinancing a $20,000 balance, even at the same rate difference. Calculate the total interest you'll pay under your current loan versus the new loan to see the actual dollar difference.
How long you plan to keep the car matters too. If you're selling or trading in the car within a year, refinancing might not save you anything because you won't be making enough payments to recoup the time and effort. If you're keeping the car for several more years, refinancing has time to pay off.
Fees and costs to watch for
Some lenders charge an origination fee (typically 0.5% to 1% of the loan amount), a documentation fee, or a title transfer fee. These are added to the loan balance, so you're paying interest on them. A $300 origination fee on a $15,000 loan might not sound like much, but over 60 months at 6%, it costs you about $50 in extra interest.
Your current lender might charge a prepayment penalty for paying off the loan early. Check your loan documents or call and ask. If there's a penalty, factor it into your refinance calculation — sometimes the penalty eats up most of the savings from a lower rate.
Some states charge a title transfer fee when the lender changes. This is usually $50 to $200 and goes to your state's DMV, not to the lender. The new lender typically handles this and adds it to your loan balance.
How to improve your rate before refinancing
If you're not happy with the rates you're being quoted, you have a few options. Wait a few months if you can and work on paying down your loan balance. A lower LTV ratio can unlock better rates. If you owe $18,000 on a $20,000 car and can pay it down to $16,000, your LTV drops from 90% to 80%, and lenders may offer you a better rate.
Check your credit report for errors before you explore. You can get a free report from each of the three major bureaus (Equifax, Experian, TransUnion) once per year at annualcreditreport.com. If there are mistakes — a late payment you actually made on time, an account that isn't yours — dispute them. Correcting errors can raise your score and improve your rate offers.
Pay down other debts if possible. Lenders look at your debt-to-income ratio and how much available credit you're using. Paying off a credit card or personal loan before you refinance can improve your score and your rate offers.
These steps take time, so they're only worth pursuing if you're not in a rush to refinance. If you need to refinance now because your current payment is unmanageable, take the best rate you can get and revisit refinancing again in a year or two once your credit improves.
Frequently Asked Questions
What's a good auto refinance rate right now?
Rates change daily and depend on your credit score, the vehicle, and market conditions. Rates generally range from 4% to 12%, with borrowers who have credit scores above 750 typically seeing rates in the 4% to 6% range, and those with scores below 650 seeing rates above 8%. Check current offers from multiple lenders to see what's available for your specific situation.
Can I refinance if I'm underwater on my loan?
Being underwater means you owe more than the car is worth. Some lenders will refinance underwater loans, but they typically charge a higher rate because the risk is greater. Credit unions are sometimes more willing to work with underwater borrowers than banks or online lenders. You may need to make a down payment to bring the LTV down to an acceptable level.
How long does it take to get approved for an auto refinance?
Soft inquiries and rate quotes take minutes. Once you choose a lender and submit a full process with a hard inquiry, approval typically takes one to three business days. The actual loan funding and payoff of your old loan can take another five to ten business days. Some online lenders fund within 24 hours, but the old lender still needs time to process the payoff.
Will refinancing hurt my credit score?
The hard inquiry will lower your score by a few points temporarily, usually recovering within a few months. Closing your old loan and opening a new one also affects your credit mix and average account age, which can lower your score short-term. Over time, making on-time payments on the new loan rebuilds your score. The temporary dip is usually worth it if you're saving money on interest.
What if I have a co-signer on my current loan?
When you refinance, you can remove the co-signer if your credit has improved since you took out the original loan. The new lender will evaluate you based on your current credit score and income. If your score has improved significantly, you may may have access to for a better rate without the co-signer. If your score hasn't improved much, the new lender might require the co-signer to stay on the new loan.