What determines your refinance rate

Your refinance rate depends on four things a lender checks: your credit score, the age and mileage of the car, how much you still owe versus what the car is worth, and the current market rate for auto loans. A lender will not offer you the same rate as someone with a higher credit score or a newer vehicle, even if you explore on the same day. The rate you see advertised is usually the best rate — reserved for borrowers with excellent credit and low loan-to-value ratios.

The current market rate itself moves with the Federal Reserve's interest rate decisions and broader economic conditions. When the Fed raises its benchmark rate, auto loan rates across the industry tend to rise within weeks. When rates fall, lenders may lower their offers, but they do not always pass the full decrease to borrowers. Your personal rate will sit somewhere above the market baseline, adjusted up or down based on your individual risk profile.

Loan term length also affects your rate. A 36-month refinance typically carries a lower rate than a 60-month refinance from the same lender, because the lender faces less risk over a shorter period. The trade-off is a higher monthly payment. A 72-month or 84-month refinance may have a higher rate but spreads the payment over more months.

Key Takeaways

  • Your credit score is the single largest factor lenders use to set your rate, and even a 20-point difference in score can move your rate by 0.5 to 1 percentage point.
  • The age and mileage of your car matter because older or high-mileage vehicles are riskier collateral, and lenders may decline to refinance or charge more.
  • Loan-to-value ratio — what you owe divided by what the car is worth — determines how much risk the lender takes; owing more than the car is worth makes refinancing difficult or impossible.
  • Shopping with multiple lenders within a two-week window counts as a single inquiry on your credit report, so comparing rates does not harm your score as much as explore separately over months.
  • The rate you see advertised is the best-case rate; your actual offer will be higher unless you have excellent credit and a newer vehicle with low mileage.

How your credit score shapes the rate you receive

Lenders use your credit score as a shorthand for how likely you are to repay on time. A score of 750 or higher typically qualifies for the lowest rates a lender offers. A score between 700 and 749 usually adds 0.5 to 1 percentage point. A score between 650 and 699 may add 1.5 to 2.5 percentage points. Below 650, many mainstream lenders decline to refinance at all, or quote rates that make refinancing pointless.

Your score reflects payment history, amounts owed, length of credit history, credit mix, and recent inquiries. If you have missed payments on your current auto loan or other debts in the past two years, your score will be lower, and lenders will charge more to offset the perceived risk. If you have paid on time consistently, that history works in your favor.

Before you shop for a refinance, check your own credit report at annualcreditreport.com, which is free and does not affect your score. Look for errors — a late payment that was actually on time, or an account that is not yours. Dispute errors with the credit bureau; corrections can take 30 to 45 days but may raise your score enough to move you into a better rate tier.

Loan-to-value ratio and why lenders care about it

Loan-to-value (LTV) is the amount you owe divided by what the car is currently worth. If you owe $15,000 on a car worth $20,000, your LTV is 75 percent. If you owe $18,000 on a car worth $20,000, your LTV is 90 percent. Lenders use this ratio to measure how much cushion they have if they have to repossess and sell the car.

An LTV of 80 percent or lower is considered safe by most lenders and typically qualifies for standard rates. An LTV between 80 and 100 percent may result in a higher rate or a smaller loan amount than you requested. An LTV above 100 percent — meaning you owe more than the car is worth — makes refinancing nearly impossible with mainstream lenders. Some credit unions or subprime lenders may refinance an underwater loan, but the rate will be significantly higher.

You can lower your LTV by making a lump-sum payment toward the principal before you refinance, or by waiting for the car to gain value (which happens slowly for most vehicles). Checking your car's value on Kelley Blue Book or NADA Guides gives you a realistic number to work with. Use the trade-in value, not the retail value, because that is closer to what a lender will accept.

Vehicle age, mileage, and condition as rate factors

Lenders have cutoffs for vehicle age and mileage. Most will not refinance a car older than 10 years or with more than 150,000 miles, regardless of condition. Some lenders are stricter — 8 years and 120,000 miles. A few credit unions or online lenders are more flexible, but they charge higher rates to compensate for the added risk.

An older or high-mileage car is riskier collateral because it is more likely to break down, leaving you unable to make payments, or to be worth less than you owe by the time the loan ends. Lenders price this risk into your rate. A 2015 sedan with 90,000 miles will receive a lower rate than a 2012 sedan with 140,000 miles, even if both have the same credit score and LTV.

Some lenders ask for a vehicle inspection report or require that the car pass a pre-refinance inspection. This is less common than it was five years ago, but it still happens. If a lender requests one, you will usually pay for it upfront — typically $100 to $200 — and the cost is not refunded if you are declined.

Market rates and how they change

The baseline auto loan rate — the rate offered to the most creditworthy borrowers — fluctuates based on the Federal Reserve's actions, inflation, and lender competition. When the Fed raises its benchmark rate, banks' cost of borrowing rises, and they pass some of that cost to consumers within a few weeks. When the Fed cuts rates, auto loan rates may fall, but lenders do not always lower them by the same amount.

Rates also vary by lender type. Banks, credit unions, and online lenders often quote different rates for the same borrower. Credit unions typically offer lower rates to members, especially if you have been a member for a while or have direct deposit set up. Online lenders may offer competitive rates but charge origination fees. Banks fall somewhere in the middle and may offer rate discounts if you have other accounts with them.

Checking the current market rate before you shop helps you know whether a lender's quote is reasonable. Sites like Bankrate, LendingTree, and Edmunds publish average rates by credit score range, updated weekly. These are not quotes — they are ranges — but they show you the ballpark. If a lender quotes you 2 percentage points above the published average for your score range, that is a sign to shop elsewhere.

How loan term length affects your rate

A shorter loan term means the lender is exposed to risk for less time, so they charge a lower rate. A 36-month refinance might be quoted at 4.5 percent, while a 60-month refinance from the same lender might be 5.2 percent. The longer the term, the higher the rate, because the lender is betting on your ability to pay over a longer period and accounting for the possibility that the car will be worth less by the end.

The monthly payment difference is substantial. On a $15,000 loan at 4.5 percent, a 36-month term costs about $438 per month, while a 60-month term costs about $280 per month. The 60-month loan costs more in total interest — roughly $1,800 more — but the monthly burden is lower. The choice depends on your budget and whether you want to pay off the car faster.

Some borrowers refinance into a longer term to lower the monthly payment, even if the rate is slightly higher. This makes sense if your current payment is straining your budget. Others refinance into a shorter term to save on interest, if they can afford the higher payment. There is no single right choice — it depends on your financial situation and how long you plan to keep the car.

Shopping for rates without damaging your credit

When you request a rate quote from a lender, they perform a hard inquiry on your credit report. One hard inquiry lowers your score by a few points, and the impact fades over time. Multiple inquiries in a short window — typically two weeks — count as a single inquiry for credit-scoring purposes, so you can shop with several lenders without compounding the damage.

The key is to do your shopping within a concentrated timeframe. If you get quotes from three lenders on Monday, Wednesday, and Friday, those three inquiries may count as one. If you get a quote on Monday and another on the following Monday, they are likely counted separately. Most credit bureaus use a 14-day window, but some use 45 days for auto loans specifically.

Before you start shopping, gather the information lenders will ask for: your current loan details (lender name, loan balance, monthly payment), your vehicle information (year, make, model, mileage, VIN), and your income. Having this ready speeds up the process and lets you complete multiple applications in a single afternoon. Write down each quote, including the rate, term, monthly payment, and any fees, so you can compare them side by side.

Frequently Asked Questions

Will refinancing lower my monthly payment?

Not automatically. If you refinance into a lower rate but keep the same loan term, your payment will drop. If you refinance into a longer term to lower the payment, you will pay more interest overall. If rates have risen since you took out your original loan, refinancing may not lower your payment at all. Calculate the total interest you will pay over the life of the new loan and compare it to what you would pay if you kept your current loan.

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

Most mainstream lenders will not refinance if you are underwater — owing more than the car is worth. Some credit unions or online lenders will, but they charge significantly higher rates and may require a larger down payment. Your best option is to make extra payments toward the principal until your loan-to-value ratio drops below 100 percent, then refinance.

How often can I refinance my auto loan?

There is no legal limit on how many times you can refinance, but lenders may decline if you have refinanced recently. Most lenders want to see at least six months between refinances. Refinancing multiple times in a short period also signals financial stress to future lenders, which can affect your rate on other loans. Refinance when rates drop significantly or when your credit score improves, not as a routine strategy.

Do I have to use my current lender to refinance?

No. You can refinance with any lender — a different bank, a credit union, an online lender, or even the same lender you borrowed from originally. Shopping around is how you find the best rate. Your current lender has no advantage unless they offer you a special rate for being an existing customer, which some do.

What fees should I expect when refinancing?

Some lenders charge an origination fee (typically 0.5 to 1 percent of the loan amount), and some charge nothing. A few charge a prepayment penalty if you pay off your current loan early, though this is less common than it used to be. Ask each lender for a complete list of fees before you commit. The lowest rate is not always the best deal if it comes with high fees.