What determines your car loan interest rate
Your interest rate is set by the lender based on how risky they think it is to lend you money. The main factors are your credit score, the size of your down payment, how long you want to borrow for, the age and type of vehicle, and current market rates. A lender with a 750 credit score might receive a rate around 4–6%, while someone with a 620 score might see 10–14% or higher — the exact numbers shift with Federal Reserve policy and each lender's own pricing.
The interest rate you're offered is not the same across all lenders. Banks, credit unions, and car dealerships all set their own rates. A credit union member might may have access to for a lower rate than a bank customer with the same credit profile. Dealerships often have access to multiple lenders and can shop your process around, but they also mark up the rate they receive — the lender approves you at 5%, and the dealer presents you with 6% or 7%.
The term of the loan also changes your rate. A 36-month loan typically carries a lower rate than a 72-month loan for the same borrower, because the lender's money is at risk for a shorter time. However, the monthly payment on a 72-month loan is lower, which is why many buyers choose the longer term even though they pay more interest overall.
Key Takeaways
- Your credit score is the single largest factor in your rate; a 100-point difference in your score can shift your rate by 2–4 percentage points.
- The same vehicle and loan term will carry different rates at a bank, credit union, and dealership — shopping around before you buy can save hundreds of dollars in interest.
- A larger down payment lowers your rate because the lender's risk decreases; putting down 20% instead of 10% often reduces your rate by 0.5–1 percentage point.
- Longer loan terms (60, 72, or 84 months) come with higher rates than shorter terms (36 or 48 months), even though the monthly payment is lower.
How your credit score affects the rate you receive
Lenders use your credit score as a proxy for how likely you are to pay on time. The score itself comes from three major bureaus — Equifax, Experian, and TransUnion — and reflects your payment history, how much debt you carry, the age of your accounts, and the mix of credit types you use. Most auto lenders use the FICO score, which ranges from 300 to 850.
The relationship between score and rate is not linear. A jump from 650 to 700 might lower your rate by 1.5 percentage points, but a jump from 750 to 800 might lower it by only 0.3 points. Lenders tier their rates into bands: one band covers 700–749, another covers 750–799. If you're at 699, you're in a worse band than someone at 700, even though the difference is one point.
If your score is below 620, many mainstream lenders will decline you or charge rates above 12%. Subprime lenders (lenders who work with borrowers who have poor credit) do offer loans in this range, but the higher rate means you pay significantly more over the life of the loan. A $25,000 loan at 15% over 60 months costs roughly $4,900 in interest; the same loan at 6% costs roughly $1,900.
Down payment size and its impact on your rate
A larger down payment reduces the amount you need to borrow, which lowers the lender's risk. Most lenders offer better rates to borrowers who put down 15–20% of the vehicle's price. Putting down 10% instead of 5% typically saves 0.25–0.5 percentage points. Putting down 20% instead of 10% can save another 0.5–1 point.
The down payment also affects whether you're underwater on the loan — owing more than the car is worth. If you finance 95% of a car's value and the car depreciates quickly, you could owe $22,000 on a car worth $20,000 within the first year. Lenders price this risk into the rate. A 20% down payment means you start with equity in the vehicle, which makes the lender more comfortable offering a lower rate.
Down payment size matters less if you have excellent credit. A borrower with a 780 score might receive nearly the same rate whether they put down 10% or 20%. A borrower with a 650 score will see a much larger gap between the two scenarios.
Loan term length and how it changes your rate
A 36-month loan is less risky for the lender than a 72-month loan because the money is repaid faster and the vehicle depreciates less during the loan period. Lenders price this lower risk into a lower rate. The difference between a 48-month and 72-month rate is often 0.5–1.5 percentage points.
The trade-off is the monthly payment. On a $25,000 loan at 6%, a 48-month term costs about $580 per month, while a 72-month term costs about $400 per month. Over the full loan, you pay roughly $2,840 in interest on the 48-month loan and roughly $4,800 on the 72-month loan — a difference of nearly $2,000. Many buyers choose the longer term to keep the monthly payment manageable, even though they pay more interest overall.
Loans longer than 72 months (84 or 96 months) are increasingly common but carry higher rates and leave you underwater for much of the loan term. If you need to sell or trade in the car before it's paid off, you'll owe more than it's worth.
Vehicle age, type, and condition as rate factors
New cars typically receive lower rates than used cars because they're less likely to need major repairs during the loan term. A 2024 model might may have access to for 4.5%, while a 2019 model of the same make and model might receive 5.5%. The difference widens for older vehicles; a 2015 model could see 7–8% even with good credit.
The type of vehicle also matters. Luxury brands and sports cars carry higher rates than sedans and trucks, partly because they depreciate faster and partly because lenders view them as higher-risk purchases. A Toyota Camry and a BMW 3 Series with the same price tag will not receive the same rate from the same lender.
Mileage and condition affect used car rates as well. A 2020 car with 30,000 miles will receive a better rate than a 2020 car with 80,000 miles. Some lenders have hard cutoffs — they won't finance vehicles with more than 100,000 miles, or they charge a penalty rate for anything over 80,000 miles.
How to compare rates before you buy
Get pre-approved by your bank or credit union before you visit a dealership. Pre-approval tells you the rate you may have access to for and the loan amount you can afford. It also gives you negotiating power — you can tell the dealer you have financing lined up and ask them to beat that rate. Many dealers will, because they earn a commission on the loan.
Request quotes from at least three lenders. Banks, credit unions, and online lenders all have different pricing. A credit union rate might be 0.5–1.5 percentage points lower than a bank rate for the same borrower. Online lenders often have faster approval but higher rates. Write down the rate, the term, and any fees (origination, prepayment penalty) so you can compare apples to apples.
Be aware that each rate quote involves a hard inquiry into your credit, which temporarily lowers your score by a few points. Multiple inquiries within 14 days (or 45 days for mortgage and auto loans, depending on the scoring model) typically count as a single inquiry, so do your shopping within a short window. Avoid explore for new credit cards or other loans while you're rate shopping.
What happens if your rate is higher than expected
If you're offered a rate that seems too high, ask the lender why. They should be able to point to specific factors — a lower credit score than you thought, a high debt-to-income ratio, or the vehicle's age or mileage. Some of these you can address: paying down existing debt before you explore can improve your approval odds and lower your rate. Increasing your down payment can also help.
If you've already signed the loan, you may have a window to refinance. Most lenders allow you to refinance after 60–90 days of on-time payments. If your credit score has improved or rates have dropped, refinancing can lower your rate and save you money. However, refinancing involves a new process and inquiry, and some lenders charge prepayment penalties, so calculate the savings before you proceed.
Dealer financing sometimes includes a "spot delivery" clause that lets the dealer take back the car if your financing falls through. This is rare but does happen. Read the contract carefully before you sign, and ask whether the rate is locked in or subject to change pending final approval.
Frequently Asked Questions
Why did the dealer offer me a different rate than my bank?
Dealers work with multiple lenders and can shop your process around, but they also mark up the rate. The lender might approve you at 5%, and the dealer presents 6% or 7%. Dealers earn a commission on the markup. Always get a pre-approval rate from your bank or credit union so you know what to expect and can negotiate.
Can I negotiate my interest rate?
Yes, especially at a dealership. If you have a pre-approval from another lender, tell the dealer and ask them to beat it. Banks and credit unions have less room to negotiate because their rates are set by policy, but you can shop around and choose the lender with the best offer. Rates are not fixed until you sign the contract.
What's the difference between APR and interest rate?
The interest rate is the percentage of the loan charged as interest. APR (annual percentage rate) includes the interest rate plus any fees the lender charges, expressed as an annual rate. On a car loan, the difference is usually small, but APR is the number you should compare across lenders because it's the true cost of borrowing.
Does paying a larger down payment always lower my rate?
Usually, but not always by much. If you have excellent credit (750+), the difference between a 10% and 20% down payment might be 0.25 percentage points. If you have fair credit (650–700), the difference could be 1 percentage point or more. Calculate the savings against the opportunity cost of using that cash now.
What if I have no credit history?
Lenders view no credit history as higher risk than poor credit, because they have no data on your payment behavior. You may need a co-signer with established credit, a larger down payment, or a shorter loan term. Some credit unions and online lenders specialize in first-time borrowers and offer rates in the 8–12% range.