What determines your car refinance rate

Your refinance rate depends on four main factors: your credit score, the age and mileage of your vehicle, how much you still owe compared to what the car is worth, and the current market rates that lenders are offering. Lenders use your credit score as the primary signal of risk — borrowers with scores above 750 typically see rates 2 to 4 percentage points lower than those with scores below 650. The vehicle itself matters because older cars or those with very high mileage are worth less, which means the lender has less collateral if you default.

The loan-to-value ratio, or LTV, is the amount you owe divided by what your car is currently worth. If you owe $15,000 on a car worth $20,000, your LTV is 75 percent — a safer position for the lender. If you owe $18,000 on that same car, your LTV is 90 percent, and lenders charge more for that risk. Market rates also shift based on what the Federal Reserve does with short-term interest rates and what's happening in the broader economy, so the rate you're offered today may differ from what someone gets offered next month.

Key Takeaways

  • Your credit score is the single biggest factor in your refinance rate, with differences of several percentage points between excellent and poor credit.
  • Lenders check how much you owe versus what your car is worth; owing more than 80 percent of the car's value usually means higher rates or denial.
  • The age, mileage, and condition of your vehicle affect the rate because they determine how much the car will be worth if the lender has to repossess it.
  • Market rates change regularly, so shopping with multiple lenders within a short window (typically two weeks) lets you compare without hurting your credit score multiple times.
  • Your current loan terms — how much time is left and what rate you're paying now — don't directly set your new rate, but they affect how much you save by refinancing.

How credit score affects your rate

Lenders pull your credit report and score when you explore for a refinance, and that score is the fastest way they assess whether you'll repay the loan. Credit bureaus (Equifax, Experian, and TransUnion) calculate your score based on payment history, amounts owed, length of credit history, credit mix, and recent inquiries. A score of 750 or higher typically qualifies you for the best rates a lender is offering. Scores between 700 and 749 usually see rates 0.5 to 1 percentage point higher. Scores below 650 often face rates 3 to 5 percentage points higher, or may be denied altogether.

Your score can change month to month, so if you've recently paid down credit card balances or haven't missed any payments in the last few months, your score may be higher than it was six months ago. Checking your own credit report through AnnualCreditReport.com (the free, official source) doesn't hurt your score, but when a lender pulls your report for a refinance, it creates a "hard inquiry" that temporarily lowers your score by a few points. Multiple hard inquiries within 14 days usually count as a single inquiry for scoring purposes, so shopping around with several lenders in a short window minimizes the damage.

Vehicle age, mileage, and condition

Lenders want to know what the car will be worth if they have to repossess and sell it. A 2022 sedan with 40,000 miles is worth significantly more than a 2015 sedan with 120,000 miles, even if both are the same make and model. Most lenders have cutoffs — some won't refinance cars older than 10 years, and others won't touch vehicles with more than 150,000 miles. These limits vary by lender, so a car that one bank rejects may be acceptable to another.

The condition of the vehicle also matters, though lenders usually assess this through the mileage and age rather than a physical inspection. A car with a clean title (no salvage or flood history) and no outstanding liens from previous loans is easier to refinance. If your car has been in an accident or has mechanical issues, those don't directly affect the rate, but they do affect the car's resale value, which lenders factor in when setting the LTV.

Loan-to-value ratio and how much you owe

The loan-to-value ratio is the percentage of the car's current market value that you're borrowing. If you owe $12,000 on a car worth $16,000, your LTV is 75 percent. If you owe $14,000 on that same car, your LTV is 87.5 percent. Lenders prefer LTVs below 80 percent because it gives them a cushion if the car depreciates or they have to repossess it. An LTV above 80 percent usually means higher rates, and above 100 percent (owing more than the car is worth) makes refinancing very difficult or impossible.

You can improve your LTV by making a larger down payment toward the refinance, though most lenders don't allow this. Instead, you improve your LTV by waiting for your car to appreciate (rare) or by paying down the principal on your current loan before you refinance. If you're underwater on your loan — owing more than the car is worth — some lenders will still refinance, but they may require a co-signer or charge a significantly higher rate to cover the extra risk.

Current market rates and economic conditions

The rates lenders offer change based on what's happening in the broader economy and what the Federal Reserve does with its benchmark interest rate. When the Fed raises rates, lenders typically raise the rates they offer to consumers. When the Fed cuts rates, lenders usually cut rates too, though not always by the same amount. Economic conditions like inflation, employment, and consumer spending also influence how aggressively lenders compete for refinance business.

You can track current market rates by checking what banks, credit unions, and online lenders are advertising, though the rates you see advertised are usually the best rates available — you may not may have access to for them if your credit score or LTV is weaker. Comparing rates across at least three to five lenders gives you a realistic sense of what you're likely to be offered. Rates can vary by 1 to 2 percentage points between lenders for the same borrower, so shopping around can save you hundreds of dollars over the life of the loan.

How your current loan affects your refinance decision

The rate and terms of your current loan don't directly determine your new rate, but they do determine whether refinancing makes financial sense. If you're currently paying 7 percent and lenders are offering you 5.5 percent, you save money by refinancing — assuming you don't extend the loan term and pay more interest overall. If you're currently paying 4 percent and lenders are offering 4.2 percent, the savings may be small enough that the refinancing costs (process fees, title transfer fees, and other closing costs) eat up most of the benefit.

The time remaining on your current loan also matters. If you have 18 months left on a 60-month loan, refinancing into a new 60-month loan extends your payment period and increases total interest paid, even if the monthly payment is lower. Refinancing into a shorter term (say, 36 months) keeps your payoff date closer to the original, but raises your monthly payment. Most people refinance to lower their monthly payment, but the real savings come from refinancing into a lower rate and keeping the same or shorter term.

Where to shop for refinance rates

Banks, credit unions, and online lenders all offer car refinances, and each has different rate structures and requirements. Traditional banks often have higher rates but may offer perks like fee waivers if you're an existing customer. Credit unions typically offer lower rates to members, though membership requirements vary — some are open to anyone in a geographic area, while others require employment at a specific company or membership in a professional organization. Online lenders often have faster approval processes and may be more willing to work with borrowers who have lower credit scores, though their rates may be higher.

Getting a rate quote doesn't require a hard credit pull at many lenders — some offer "soft" quotes based on your credit range that don't affect your score. Once you've narrowed down your options, you can explore with your top choices within a two-week window. Each lender will pull your credit report, but multiple inquiries within 14 days typically count as one for scoring purposes. After you've chosen a lender and been approved, they'll handle the paperwork with your current lender to pay off the old loan and set up the new one.

Frequently Asked Questions

What's a good interest rate for a car refinance right now?

Rates vary by lender, credit score, and vehicle, so there's no single "good" rate. Borrowers with excellent credit (750+) at banks and credit unions might see rates between 4 and 6 percent, while those with fair credit (650–700) might see 7 to 10 percent. Check what your current lender is offering and compare it to at least three other sources to understand the market.

Will refinancing hurt my credit score?

Refinancing causes a temporary dip in your score because lenders pull your credit report. The dip is usually small (5–10 points) and recovers within a few months. Shopping with multiple lenders within 14 days counts as a single inquiry, so you can compare rates without multiplying the damage.

Can I refinance if I'm underwater on my loan?

Some lenders will refinance loans where you owe more than the car is worth, but they typically charge higher rates or require a co-signer. The higher rate reflects the extra risk. A few lenders specialize in underwater refinances, though you'll pay for that flexibility.

How long does a car refinance take?

Approval usually takes one to three business days once you've submitted your process. The lender then contacts your current lender to pay off the old loan and sets up the new one, which typically takes another five to seven business days. You'll usually start making payments to the new lender within two to three weeks of approval.

Does refinancing reset the loan term?

You choose the new loan term when you refinance — it doesn't automatically reset. If you had 18 months left on a 60-month loan and refinance into a new 60-month loan, you've extended your payoff date by 42 months. To keep your payoff date close to the original, refinance into a shorter term, though that raises your monthly payment.