What determines the interest rate you get on a new car loan
The interest rate a lender offers you depends on your credit score, the size of your down payment, the loan term you choose, and the lender's own cost of borrowing money. Banks and credit unions do not all charge the same rate for the same car — a borrower with a 750 credit score might pay 4.5% while someone with a 620 score pays 9.2% at the same dealership. The rate also shifts based on what the Federal Reserve does with its benchmark interest rate, which changes how much it costs banks to lend money in the first place.
Your credit score is the single largest factor lenders look at. Scores above 740 typically unlock the lowest rates available that month. Scores between 670 and 739 usually see rates 1 to 3 percentage points higher. Below 620, rates often jump another 2 to 4 points. A down payment of 20% or more also lowers your rate because it reduces the lender's risk — you have more of your own money at stake if the car loses value.
The loan term matters too. A 36-month loan almost always carries a lower rate than a 72-month loan from the same lender, because the lender collects their money back faster and takes on less risk that your circumstances will change. Dealerships sometimes advertise a low rate but only for a short term, or only for buyers with excellent credit.
Key Takeaways
- Your credit score is the primary factor lenders use to set your rate, with scores above 740 typically receiving the lowest available rates and scores below 620 facing rates 4 to 7 percentage points higher.
- A larger down payment (20% or more) lowers your rate because it reduces the lender's risk if the car depreciates.
- Shorter loan terms carry lower rates than longer ones from the same lender, because the lender recovers their money faster.
- The Federal Reserve's interest rate decisions affect all lenders' costs, so rates across the market rise and fall together over time.
- Shopping with multiple lenders — banks, credit unions, and dealerships — can reveal rate differences of 1 to 3 percentage points for the same borrower.
How your credit score affects the rate
Lenders pull your credit report and calculate your score to measure how reliably you have paid past debts. A higher score signals lower risk. Most lenders use FICO scores, which range from 300 to 850. The scoring model weights payment history (35%), amounts owed (30%), length of credit history (15%), credit mix (10%), and new credit inquiries (10%).
The difference between a 700 score and a 750 score might be 0.5 to 1 percentage point on your rate. The difference between 650 and 700 might be 2 to 3 points. Below 620, the gap widens further because lenders see you as significantly more likely to default. If you have missed payments, have high credit card balances, or have recently opened many new accounts, your score will be lower and your rate will be higher.
You can request your credit report for free once per year from AnnualCreditReport.com, which is the only official source. Checking your own report does not lower your score. If you see errors — a payment marked late that you made on time, or an account that is not yours — you can dispute it with the credit bureau, though disputes take 30 to 45 days to resolve.
Why down payment size changes your rate
A down payment is money you give the lender upfront, reducing the amount they have to lend you. If you buy a $30,000 car and put down $6,000, the lender finances $24,000. If you put down $3,000, they finance $27,000. The larger your down payment, the lower the loan-to-value ratio, and the lower your rate.
Lenders care about loan-to-value because it determines how much they lose if you stop paying and they have to repossess and sell the car. A car loses value the moment you drive it off the lot — typically 10% to 15% in the first year. If you owe $27,000 on a car worth $25,500, the lender is underwater if you default. If you owe $24,000 on the same car, they have a cushion. That cushion is worth 0.25 to 0.75 percentage points on your rate.
Most lenders offer their best rates to borrowers putting down 20% or more. Some offer slightly better rates at 25% down. Beyond that, the improvement flattens out. A down payment also reduces your monthly payment and the total interest you pay over the life of the loan, so it benefits you in multiple ways.
How loan length affects your interest rate
A 36-month loan is paid off in three years. A 60-month loan takes five years. A 72-month or 84-month loan stretches to six or seven years. Longer loans carry higher rates because the lender takes on more risk — your job, income, or health could change over a longer period, and the car depreciates further.
The rate difference between a 36-month and 60-month loan from the same lender is typically 0.5 to 1.5 percentage points. A 72-month loan might be another 0.5 to 1 point higher. However, the monthly payment on a longer loan is lower because you are spreading the cost across more months. A $25,000 loan at 5% costs about $460 per month for 60 months but only $390 per month for 72 months — even though you pay more interest overall.
Dealerships sometimes advertise a low rate only for shorter terms to attract buyers, then offer a higher rate for longer terms. Always ask what rate you may have access to for at each term length, because the advertised rate may not explore to you.
The role of the Federal Reserve and market conditions
The Federal Reserve sets a benchmark interest rate that influences how much it costs banks to borrow money from each other. When the Fed raises its rate, banks' costs go up, and they pass that cost to borrowers by raising loan rates. When the Fed cuts its rate, loan rates typically fall. This happens over weeks or months, not when ready.
The Fed raised rates significantly between 2022 and 2023, and new car loan rates climbed from around 4% to 7% or higher depending on credit score and loan term. When the Fed paused and then began cutting rates in late 2023, loan rates started to decline, though they remained higher than they were in 2021.
Market conditions also matter. If unemployment is low and demand for cars is high, lenders may raise rates because they have more customers to choose from. If the used car market is weak, lenders may lower rates to attract borrowers. You cannot control these forces, but you can monitor them — checking what rates major lenders are advertising this month versus last month tells you whether the market is moving in your favor.
Where to shop for the best rate
Banks, credit unions, and dealerships all offer car loans, and their rates differ. A bank might offer 5.5% to a borrower with a 720 credit score, while a credit union offers 5.1% and a dealership offers 5.8%. Shopping with at least three lenders takes 30 to 45 minutes and can save you thousands of dollars over the life of the loan.
Credit unions often offer lower rates than banks because they are member-owned and operate on a non-profit basis. However, you must be a member to borrow from them. Many credit unions allow you to join if you live or work in their service area, or if a family member is already a member. Some have no geographic restrictions.
Dealerships can offer competitive rates because they work with multiple lenders behind the scenes. However, dealerships also earn a commission on the loan, which can incentivize them to steer you toward a higher rate. Always get a pre-approval from a bank or credit union before you go to the dealership — that gives you a rate to compare against what the dealer offers.
When you request a rate quote, lenders perform a hard credit inquiry, which temporarily lowers your score by a few points. Multiple inquiries within 14 to 45 days (depending on the credit scoring model) count as a single inquiry, so do your shopping within a short window to minimize the impact.
What happens after you lock in a rate
Once you and the lender agree on a rate, that rate is usually locked for 30 to 60 days while you finalize the purchase. If you buy the car within that window, you get the locked rate. If you delay beyond the lock period, the lender may require a new rate quote, and rates may have changed.
The rate you lock is based on the loan amount, term, and down payment you specified. If you change any of those details — for example, you decide to put down less money or extend the loan to 72 months — the lender will recalculate your rate. A smaller down payment or longer term will raise your rate.
After you sign the loan documents, your rate is final and cannot be changed by the lender. However, you may have the option to refinance the loan later if rates drop or your credit score improves. Refinancing means taking out a new loan to pay off the old one, and you would pay closing costs and start a new loan term. Refinancing makes sense only if the new rate is at least 0.5 to 1 percentage point lower and you plan to keep the car long enough to recoup the closing costs.
Frequently Asked Questions
Can I get a lower rate if I pay cash instead of financing?
No. Paying cash means you do not borrow, so there is no interest rate. However, some dealerships offer a small discount for cash purchases to avoid the paperwork and risk of lending. That discount is usually smaller than the interest you would pay on a loan, so the financial benefit depends on your specific situation and the dealership's offer.
What is the difference between APR and interest rate?
The interest rate is the percentage of the loan amount you pay in interest each year. The APR (annual percentage rate) includes the interest rate plus other costs like origination fees and insurance. Lenders are required to disclose the APR, which is the number to compare when shopping between lenders.
Does the color or model of the car affect my interest rate?
No. Lenders care about the car's value and depreciation, not its color. Some models hold value better than others, which can indirectly affect the loan-to-value ratio, but the lender's rate is based on your credit, down payment, and loan term, not the specific car you choose.
Can I negotiate the interest rate at a dealership?
The dealership's finance manager may have some flexibility, especially if you have a strong credit score and a large down payment. However, the rate is ultimately set by the lender, not the dealership. Your best leverage is a pre-approval from a bank or credit union — if the dealership cannot beat that rate, you can walk away and use your pre-approval.
What if my credit score improves after I get a loan?
Your current loan rate will not change. However, if your score improves significantly — for example, you pay off credit card debt or correct errors on your report — you may be able to refinance at a lower rate after six months to a year. Refinancing has closing costs, so calculate whether the savings justify the cost before you explore.