How refinancing rates are set

Your refinancing rate depends on the same factors lenders use to price any loan: your credit score, the loan term you choose, current market rates, and the age and mileage of your car. A lender pulls your credit report, sees what you owe on the existing loan, and calculates the risk of lending you money. The better your credit score, the lower the rate they'll offer. If your score has improved since you took out your original loan, refinancing can save you hundreds of dollars over the life of the loan.

Market rates also matter. When the Federal Reserve raises or lowers its benchmark rate, banks adjust what they charge borrowers. You cannot control the market, but you can control when you shop. Rates change daily, and sometimes weekly. Getting quotes from multiple lenders on the same day lets you compare what's actually available to you right now, not what was available last month.

The age and condition of your car affect the rate too. Most lenders won't refinance a vehicle older than 10 years or with more than 150,000 miles, though this varies by lender. Newer cars with lower mileage are seen as less risky, so they get better rates. If your car is very old or has very high mileage, you may find fewer lenders willing to refinance at all.

Key Takeaways

  • Your credit score is the single biggest factor in the rate you receive, so checking your score before shopping helps you know what range to expect.
  • Rates change daily based on market conditions and lender policies, so getting quotes from at least three lenders on the same day gives you a real comparison.
  • The loan term you choose (36 months, 60 months, 72 months) directly affects your rate—shorter terms usually come with lower rates but higher monthly payments.
  • Your car's age, mileage, and condition set a ceiling on which lenders will even consider you, so older or high-mileage vehicles have fewer options.

Credit score and your rate

Lenders use your credit score as the primary signal of how likely you are to repay. Scores typically range from 300 to 850. Someone with a score above 750 will see rates that are 2 to 4 percentage points lower than someone with a score between 600 and 650. That difference adds up: on a $25,000 loan over five years, the gap between a 5% rate and a 9% rate is roughly $5,000 in total interest.

Before you shop for refinancing, pull your own credit report from AnnualCreditReport.com, which is free and federally mandated. Look for errors—wrong account balances, accounts that aren't yours, or late payments that were actually on time. Dispute any errors with the credit bureau directly. Even small corrections can nudge your score up a few points. If your score has risen since your original loan, that's your main reason to refinance.

If your score is still low, you have two choices: wait a few months while you pay bills on time and reduce credit card balances, or refinance now with a co-signer who has better credit. A co-signer doesn't put money in but does promise to pay if you don't, so lenders treat the loan as less risky. The rate will be better than you'd get alone, though not as good as if your own score were higher.

Loan term and monthly payment trade-offs

The term is how long you have to repay the loan. Common terms are 36, 48, 60, and 72 months. Shorter terms come with lower interest rates because the lender's money is at risk for less time. A 36-month refinance might be offered at 4.5%, while a 72-month refinance on the same car and credit score might be 5.2%.

But a shorter term means a higher monthly payment. If you refinance $20,000 at 4.5% over 36 months, your payment is roughly $590 per month. The same loan at 5.2% over 72 months is roughly $310 per month. The longer loan costs more in total interest, but the monthly hit to your budget is smaller. The choice depends on what you can actually afford to pay each month, not just which rate looks best on paper.

One common mistake is extending the term too far. If you have three years left on your original loan and you refinance into a six-year term, you're stretching the debt out longer than you originally planned. You'll pay more interest overall and stay underwater on the car longer. Refinance into a term that's shorter than or equal to what you have left, if your budget allows.

Shopping for rates from multiple lenders

Rates vary significantly between lenders. Banks, credit unions, and online lenders all price differently based on their own risk models and cost of funds. A bank might offer 5.1% while a credit union offers 4.8% on the same loan. The only way to know what you'll actually be offered is to get quotes.

Contact at least three lenders on the same day. This matters because each lender does a hard pull of your credit report when you request a quote, and multiple hard pulls in a short window (usually 14 days) count as a single inquiry for credit scoring purposes. Spread them out over weeks, and each one dings your score separately. The lenders you should contact are your current lender (they may offer a loyalty rate), your bank or credit union if you have one, and one or two online lenders like LendingClub, Upstart, or Lightstream.

When you get a quote, ask for it in writing and confirm the rate is locked—meaning it won't change if you decide to move forward in the next few days. Some lenders lock rates for 30 days; others for 7 days. A written quote also shows the exact term, monthly payment, and total interest you'll pay, so you can compare apples to apples.

When refinancing saves money and when it doesn't

Refinancing makes sense if the new rate is at least 0.5 to 1 percentage point lower than your current rate. Below that threshold, the savings are usually eaten up by fees and the time it takes to close. Most refinances have no origination fee, but some lenders charge $50 to $300 to process the loan. Factor that into your math.

Calculate how long it will take to break even. If your new rate saves you $50 per month and there's a $200 fee, you break even in four months. If you plan to keep the car for at least that long, refinancing is worth it. If you're thinking of selling or trading in within a few months, skip it.

Refinancing also doesn't make sense if you're near the end of your loan. If you have 12 months left and you refinance into a 36-month term, you're extending the debt significantly. The lower rate has to be very good to offset that cost. In most cases, if you're within a year of paying off your current loan, stick with it.

How to lock in your rate

Once you've chosen a lender and accepted a quote, the lender will ask for documents: your driver's license, proof of insurance, the current loan payoff amount (which your current lender provides), and the vehicle identification number (VIN). The lender uses these to verify you own the car and that the loan amount is accurate.

The lender then orders a title search to confirm there are no liens other than the current loan. This usually takes one to three business days. Once the title is clear, the lender funds the new loan and pays off your old one directly. You never handle the money—it moves between lenders. Your old lender releases the title, and the new lender becomes the lienholder.

The entire process typically takes five to ten business days from the time you submit documents to the time the new loan is funded. During this window, your rate is locked (assuming you locked it in writing). After funding, your first payment to the new lender is usually due 30 days later.

Frequently Asked Questions

Will refinancing hurt my credit score?

Yes, but only temporarily. The hard inquiries from lenders will drop your score by a few points for a few months. Getting multiple quotes on the same day counts as one inquiry, so shop within a 14-day window. The bigger hit comes if you close your old loan and open a new one—your average account age drops, which lowers your score. This effect fades within six months as the new account ages.

Can I refinance if I'm behind on payments?

Most lenders won't refinance if you're currently behind or have missed a payment in the last 90 days. Some will consider you if you've caught up and made three consecutive on-time payments after the missed one. Call lenders directly to ask—their policies vary. If you're in hardship, contact your current lender about a loan modification instead of refinancing.

What if I owe more than the car is worth?

You're underwater on the loan. Most lenders won't refinance if you owe more than 120% of the car's current market value. You can check the value on Kelley Blue Book or NADA Guides. If you're deeply underwater, you may need to wait until you've paid down the principal enough to refinance, or accept a higher rate from a lender willing to take the extra risk.

Do I need to refinance with the same lender?

No. You can refinance with any lender that will approve you. Many people refinance away from their original lender to get a better rate. Your original lender has no claim on you once the new lender pays them off. The only advantage to staying is if your current lender offers a loyalty discount, so ask them for a quote before you shop elsewhere.

How often can I refinance?

Technically, you can refinance as many times as you want. Practically, lenders prefer not to refinance a loan that's been open for less than six months, and each refinance costs time and involves a hard credit pull. Refinance when rates drop significantly or when your credit score improves enough to may have access to for a better rate. Refinancing every few months to chase small rate changes costs more in fees and credit damage than you'll save.