What "best" means depends on your credit score and how much you want to save

There is no single best bank for auto refinancing because the lender that offers you the lowest rate depends on your credit history, the age of your car, and how much you still owe. A bank that gives excellent rates to borrowers with a 750 credit score may charge much higher rates to someone at 650. The same lender might refinance a 2019 vehicle but decline a 2010 model. Your job is to compare actual offers from multiple lenders, not to find the one "best" name.

The main categories of lenders are traditional banks, credit unions, and online lenders. Each has different underwriting rules, rate ranges, and approval speeds. Getting quotes from at least three lenders in different categories will show you what you actually may have access to for, rather than guessing based on advertising or reviews.

Key Takeaways

  • The lowest rate available to you depends on your credit score, income, and the age and value of your car — not on which lender is "best" in general.
  • Banks, credit unions, and online lenders use different approval standards, so comparing offers from all three categories usually reveals your actual options.
  • A rate quote does not lock you in, and most lenders allow you to shop around without penalty, so request quotes from at least three places before deciding.
  • Your existing bank or credit union may offer you a better rate than a new lender because they already know your payment history.
  • Online lenders typically approve and fund faster than banks, but their rates are not always lower — speed and convenience cost money.

Traditional banks and what they look for

Large national banks like Chase, Bank of America, Wells Fargo, and Citi all offer auto refinancing, as do smaller regional banks. Banks typically want to see a credit score of 660 or higher, though some will work with lower scores at higher rates. They also look at your debt-to-income ratio — how much you already owe compared to what you earn — and they verify your income through tax returns or recent pay stubs.

Banks move slowly. Approval can take one to two weeks, and funding another week after that. However, banks often offer lower rates to borrowers with strong credit because they have lower risk. If you have a credit score above 700 and stable income, a bank may be worth the wait. If you already bank there, ask about their existing customer rates — many banks offer a small discount to people who already have a checking or savings account with them.

Credit unions and membership requirements

Credit unions are member-owned nonprofits, and they often offer lower rates than banks because they do not need to generate profit for shareholders. Common credit unions include Navy Federal, Pentagon Federal, and Connexus, though most people join through their employer, their school, or their geographic location. You must be a member to borrow, which usually means opening a savings account with a small deposit.

Credit unions typically approve faster than banks — often within three to five business days — and they are more flexible with credit scores. Some will refinance borrowers with scores in the 600s, whereas a bank might decline them. The downside is that credit union rates vary widely depending on which union you join, so you cannot assume one credit union's rate will match another's. If you are already a member, contact your credit union first; if you are not, check whether you are may be able to access to join one through your employer or a professional association.

Online lenders and speed versus rate

Online lenders like LendingClub, Upgrade, and Lightstream approve and fund the fastest — sometimes within 24 hours. They also tend to accept lower credit scores and work with older vehicles. The trade-off is that their rates are usually higher than banks or credit unions offer to the same borrower. You are paying for speed and convenience.

Online lenders use automated underwriting, which means a computer algorithm reviews your process rather than a human loan officer. This makes approval faster but also less flexible — if the algorithm says no, there is usually no appeal. Read the terms carefully: some online lenders charge prepayment penalties if you pay off the loan early, which defeats the purpose of refinancing to a lower rate. Ask directly whether there is a prepayment penalty before you accept an offer.

How to compare offers across lenders

Request a rate quote from at least three lenders — one traditional bank, one credit union (if you are may be able to access), and one online lender. A rate quote does not commit you to anything and does not lock in a rate; it is just a number to compare. Most lenders allow you to shop around without penalty, though some may do a hard credit pull, which temporarily lowers your score by a few points. Multiple hard pulls within 14 days usually count as a single inquiry for credit scoring purposes, so do your shopping within a two-week window.

When you compare, look at the annual percentage rate (APR), not just the interest rate. The APR includes fees and gives you the true cost of borrowing. Also note the loan term — a 60-month loan will have a lower monthly payment than a 48-month loan, but you will pay more interest overall. A lender offering a 0.5% lower rate but a longer term might not actually save you money. Use an online calculator or ask the lender to show you the total interest you will pay over the life of the loan.

Your existing lender and why they might offer the best deal

Before you shop around, contact the bank or credit union that currently holds your auto loan. Many lenders offer a rate reduction to existing borrowers who refinance with them, sometimes without even pulling your credit again. They already know you make your payments on time, so they see you as lower risk. This discount can be 0.25% to 0.5% lower than what you would get as a new customer.

Even if your current lender does not offer the lowest rate, refinancing with them is often faster because they already have your documents and payment history. You might save a week or more on approval and funding. If another lender's rate is only slightly lower, the speed advantage of staying put might be worth it.

What happens after you choose a lender

Once you accept an offer, the lender will order a payoff quote from your current lender, which shows exactly how much you owe on that day. The new lender pays off the old loan and issues you a new one with the new rate and term. This process usually takes one to three weeks from acceptance to funding, depending on the lender. During this time, keep making payments to your old lender until you receive confirmation that the loan has been paid off.

After funding, you will receive new loan documents and payment instructions. Your monthly payment will change based on the new rate and term. Some lenders allow you to set up automatic payments, which can lower your rate by 0.25% in some cases. Check your new loan documents for this option.

Frequently Asked Questions

Will refinancing hurt my credit score?

Yes, but temporarily. The hard credit pull will lower your score by a few points for a few months. However, refinancing to a lower rate usually improves your credit over time because it lowers your overall debt and improves your payment history. The short-term dip is worth the long-term gain if the new rate saves you money.

Can I refinance if I owe more than the car is worth?

It depends on the lender. Banks and credit unions usually decline if you are underwater on the loan. Some online lenders will refinance an underwater loan, but they charge higher rates to cover the risk. Check with your current lender first — they may refinance you even if you are underwater because they already own the loan.

What if I have bad credit or no credit history?

Credit unions and some online lenders work with borrowers below 620, though rates will be higher. You may also need a co-signer with better credit. Contact your current lender first — they know your payment history and may offer you a rate reduction even if your credit score is low.

How long does the whole process take?

Online lenders typically approve within 24 hours and fund within three to five business days. Credit unions usually take three to seven business days. Banks can take two to three weeks. The payoff and funding of your new loan adds another week or two, so plan for two to four weeks total from process to the new loan being active.

Can I refinance multiple times?

Yes, but each refinance costs money in fees and credit pulls, and each one resets your loan term. If you refinance a 48-month loan into a new 60-month loan, you extend your payoff date even if the rate is lower. Refinance only if the rate savings outweigh the costs and you will not extend the loan term significantly.