Your refinance rate depends on your credit score, the loan term you choose, and current market conditions—not on what you paid before
When you refinance an auto loan, you're replacing your existing loan with a new one, and the interest rate on that new loan is what matters. That rate is not tied to your original rate. A lender will look at your current credit score, how much you still owe, the age and mileage of your vehicle, and how long you want to borrow for. If your credit has improved since you bought the car, you may may have access to for a lower rate. If it has worsened, you may not. Current market conditions—which shift weekly—also affect what rate you're offered.
The rate you see advertised by a bank or credit union is not the rate you will necessarily receive. That advertised rate is typically the best rate available to borrowers with excellent credit (usually 740 or above). Most people refinance at a rate somewhere between that advertised floor and a higher ceiling, depending on their actual credit profile.
Key Takeaways
- Your refinance rate is determined by your current credit score, the remaining loan balance, your vehicle's age and condition, and the loan term you select—not by your original loan rate.
- Advertised rates shown by lenders are typically available only to borrowers with credit scores of 740 or higher; most borrowers receive rates between that floor and a higher rate based on their credit tier.
- Refinance rates change weekly or more often and vary significantly between lenders, so comparing offers from at least three different sources is necessary to find your actual rate.
- A longer loan term (60 or 72 months instead of 48 months) will lower your monthly payment but raise your interest rate and total interest paid over the life of the loan.
How lenders calculate the rate they offer you
When you explore to refinance, the lender pulls your credit report and score. That score is the primary factor. Credit scores typically range from 300 to 850. Lenders divide borrowers into tiers: excellent (usually 740+), good (670–739), fair (580–669), and poor (below 580). Each tier has a different rate floor. A borrower with a 750 score might be offered 4.5%, while a borrower with a 680 score might be offered 6.2% for the same loan term and vehicle.
The lender also looks at how much you owe relative to what the car is worth. If you owe $15,000 on a car worth $18,000, that's a safer loan than owing $15,000 on a car worth $14,000. The safer loan gets a lower rate. Vehicles older than 10 years or with very high mileage (typically over 120,000 miles) may not be refinanceable at all, or only at significantly higher rates, because they're considered higher risk.
The loan term you choose also affects your rate. A 36-month refinance will carry a lower rate than a 60-month refinance for the same borrower, because the lender's money is at risk for a shorter period. The trade-off is that your monthly payment will be higher.
Why rates vary so much between lenders
Banks, credit unions, and online lenders all set their own rates based on their own cost of borrowing and their own risk appetite. A credit union that primarily serves its members may offer lower rates than a bank that sells loans on the secondary market. An online lender that specializes in refinancing may have different pricing than a traditional bank. There is no single "the" refinance rate—there are dozens of rates available on any given day, and the one you receive depends on which lender you choose and what your credit profile looks like to that specific lender.
Rates also shift based on broader economic conditions. When the Federal Reserve raises its benchmark interest rate, auto refinance rates typically rise within days or weeks. When the Fed cuts rates, refinance rates usually fall, though not always by the same amount. A rate that was 5.2% last month might be 5.8% this month, or 4.9%, depending on what happened in the broader economy.
The difference between APR and interest rate
The interest rate is the percentage of your loan balance that you pay in interest each year. The APR (annual percentage rate) includes the interest rate plus any fees the lender charges, expressed as an annual rate. For auto refinancing, the difference is usually small—often less than 0.1%—because refinance loans typically have minimal fees. But it's worth checking: if one lender quotes you 5.0% APR and another quotes 5.0% interest rate plus a $300 origination fee, the APR on the second loan will be slightly higher.
Always compare APRs, not just interest rates, when you're looking at offers from different lenders. The APR is the true cost of borrowing and is what you should use to decide which offer is best.
How your credit score affects your rate
A single-point improvement in your credit score won't change your rate, but moving from one credit tier to another will. If your score is 679 and you're in the "fair" tier, paying down a credit card to push your score to 680 and move into the "good" tier might lower your rate by 0.5% to 1.5%. That difference compounds over the life of the loan.
On a $15,000 refinance over 48 months, the difference between 5.5% and 6.5% is roughly $240 in total interest paid. On a 60-month loan, it's roughly $380. If you're on the borderline between credit tiers, it may be worth waiting a few months to refinance after paying down other debts, rather than refinancing when ready at a higher rate.
Your payment history on your current auto loan also matters. If you've made every payment on time, lenders see you as lower risk. If you've been late, even once, some lenders will charge you a higher rate or decline to refinance you altogether.
Comparing rates across lenders
You should get rate quotes from at least three different sources before deciding to refinance. A typical comparison might include a bank (like Wells Fargo or Chase), a credit union (if you're a member of one), and an online lender (like LendingClub or Lightstream). Each will pull your credit and give you a rate quote. These are usually soft inquiries that don't damage your credit score, though you should confirm this before explore.
When you compare, make sure you're looking at the same loan term and the same loan amount. A quote for a 48-month loan at $15,000 is not comparable to a quote for a 60-month loan at $15,000—the rates will be different. Write down the APR, the monthly payment, and the total interest you'll pay over the life of the loan for each offer. The lowest APR is usually the best deal, but the lowest monthly payment might not be if it comes with a much longer term and much higher total interest.
When to refinance based on rate changes
If current refinance rates have dropped more than 1% below your current rate, refinancing usually makes financial sense, assuming you plan to keep the car for at least a couple more years. On a $15,000 loan, a 1% rate drop saves you roughly $150 to $200 in total interest over a 48-month term. If refinancing costs you $200 in fees, you break even, and any additional savings are yours.
If rates have dropped only 0.5%, the math is tighter. You might still come out ahead, but only if you keep the car long enough to recoup any fees. If you're planning to sell or trade in the car within a year, refinancing probably isn't worth it, even if rates have dropped.
Rates don't have to drop for refinancing to make sense. If your credit score has improved significantly since you took out your original loan, you may may have access to for a lower rate even if market rates haven't changed. Check your credit score before you refinance—you can get a free report from AnnualCreditReport.com once per year, or use a free credit monitoring service.
Frequently Asked Questions
Will refinancing hurt my credit score?
A hard inquiry from a lender will lower your score by a few points temporarily. Multiple inquiries within 14 days typically count as a single inquiry, so getting quotes from several lenders in a short window minimizes the damage. Your score usually recovers within a few weeks. Opening a new loan account will also temporarily lower your score, but the effect fades over time as you make on-time payments.
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 you, but typically only if you're not too far underwater (usually no more than 10% to 15% above the car's value) and your credit is good. Others won't refinance underwater loans at all. You'll need to ask lenders directly whether they'll consider your situation.
What if my rate quote expires before I decide?
Rate quotes typically expire after 30 to 45 days, though some lenders hold them longer. If you're still shopping, ask the lender to extend your quote. If it expires, you can always explore again and get a new quote, though your credit will be pulled again. Quotes that expire within days are usually a sign that rates are moving quickly, which might push you to decide sooner rather than later.
Does the age of my car affect my refinance rate?
Yes. Newer cars (typically under 7 or 8 years old) refinance at lower rates because they're worth more and are considered lower risk. Cars older than 10 years may face higher rates or may not be refinanceable at all, depending on mileage and condition. Ask lenders about their age and mileage limits before you explore.
Can I lock in a rate before I explore?
Most lenders will hold a rate quote for 30 to 45 days without requiring you to complete the process. Some will lock a rate for longer if you pay a small fee, typically $50 to $100. Whether this is worth it depends on whether you think rates will rise significantly in the time you're considering. If rates are stable, locking in a rate is usually unnecessary.