Refinancing your car loan means replacing it with a new loan, ideally at a lower interest rate or with better terms. The process takes about two to three weeks from application to payoff and can save you hundreds or even thousands of dollars over the life of the loan. Here’s how to do it step by step.
When Refinancing Makes Sense
The biggest reason to refinance is a lower interest rate. If your credit score has improved since you took out your original loan, or if market rates have dropped, you could qualify for a meaningfully better deal. To put this in perspective, used car loan rates average around 9.98% for borrowers with prime credit (scores of 661 to 780) and 14.49% for nonprime borrowers (601 to 660), based on Q4 2025 data from Experian. If you originally financed at a higher tier and your score has since climbed, the savings from even a two-percentage-point drop on a $20,000 balance can easily exceed $1,000 over the remaining term.
Refinancing also makes sense if you want to shorten your loan term to pay the car off faster, or extend your term to lower your monthly payment when cash flow is tight. Extending the term reduces what you pay each month but increases the total interest you’ll pay over the life of the loan, so weigh both numbers before choosing.
Check Your Eligibility First
Before you start shopping for lenders, make sure your situation qualifies. Most lenders require that your vehicle is 10 model years old or newer and has fewer than 125,000 to 150,000 miles on it. The car also needs a clean title, meaning no salvage or flood damage designation.
You’ll need to know your current loan balance and your car’s approximate market value. Look up your vehicle on pricing tools like Kelley Blue Book or Edmunds to get a realistic number. If your loan balance is higher than what the car is worth, you have negative equity, which limits your options (more on that below). Most lenders prefer a loan-to-value ratio where the loan amount doesn’t exceed the car’s value by much, if at all.
Your credit score matters too. Pull your credit report for free at AnnualCreditReport.com so you know where you stand. Borrowers with scores above 660 generally get the most competitive rates, but refinancing options exist across the credit spectrum.
Gather Your Documents
Having everything ready before you apply speeds up the process significantly. You’ll typically need:
- Driver’s license or state ID
- Proof of income such as recent pay stubs, tax returns, or bank statements
- Proof of insurance showing your current coverage
- Current loan details including your account number, remaining balance, and monthly payment (your latest statement works)
- Vehicle information including the VIN, make, model, year, and current mileage
Shop Multiple Lenders
This is the step most people skip, and it costs them money. Rates vary widely between lenders, so get quotes from at least three or four. Check your current bank or credit union, online lenders, and other credit unions you’re eligible to join. Credit unions often offer lower rates than banks or dealership financing.
When you apply to multiple lenders within a short window, typically 14 days, the credit bureaus treat all the hard inquiries as a single pull for scoring purposes. This means rate shopping won’t damage your credit score the way spreading applications over several months would. Use that window to your advantage and compare aggressively.
Look beyond the interest rate. Compare the annual percentage rate (APR), which includes fees and gives you a truer cost comparison. Also pay attention to the loan term each lender offers and whether they charge origination or processing fees.
Understand the Costs Involved
Refinancing a car loan is far cheaper than refinancing a mortgage, but it’s not always free. Here are the potential costs to watch for:
- Title transfer fee: When the lien moves from your old lender to the new one, your state charges a fee to update the title. This varies by state but typically runs between $5 and $75.
- Transaction or processing fees: Some lenders charge an application or processing fee. Ask upfront, and don’t be afraid to request that they waive it, especially if you have strong credit or an existing relationship with the lender.
- Prepayment penalty: Check your current loan agreement to see if your existing lender charges a fee for paying off the loan early. Most auto lenders don’t impose prepayment penalties, but some do, particularly subprime lenders. If yours does, factor that cost into your savings calculation.
Add up these costs and subtract them from your projected interest savings. If refinancing saves you $1,500 in interest but costs $100 in fees, you’re still $1,400 ahead. If the fees eat most of the savings, it may not be worth the effort.
Apply and Close the New Loan
Once you’ve picked a lender, you’ll formally submit your application along with your documents. The lender will verify your income, pull your credit, and confirm the vehicle’s value. Some lenders handle the entire process online, while others may ask you to visit a branch.
After approval, the new lender pays off your existing loan directly. You don’t have to handle that transfer yourself. Your old lender then releases the lien on the title, and the new lender is recorded as the lienholder. This payoff and title transfer process usually takes one to two weeks.
Keep making payments on your original loan until you receive written confirmation that it’s been paid off. A gap in payments during the transition could result in a late payment on your credit report, so don’t assume the old loan is closed until you see it in writing.
What to Do If You’re Underwater
If you owe more than your car is worth, you’re in a negative equity position. This happens frequently with long loan terms or low down payments because cars depreciate faster than the loan balance shrinks. Refinancing with negative equity is harder because lenders don’t want to issue a loan that exceeds the collateral’s value.
You have a few options. If you’re only slightly underwater, making extra payments toward the principal for a few months can close the gap and put you in a better position to refinance. Splitting your monthly payment into biweekly payments is another way to chip away at the balance faster, since you’ll make the equivalent of one extra full payment per year. If the loan term or high interest rate is what created the negative equity in the first place, some lenders will still refinance you into a shorter term or lower rate, which helps you build equity more quickly going forward.
If you’re significantly underwater and can’t wait, consider whether gap insurance makes sense. Gap insurance covers the difference between your car’s value and your loan balance if the car is totaled, protecting you from a financial hit while you work toward positive equity.
Timing Your Refinance
You can refinance at any point during your loan, but timing matters. Refinancing within the first year or two gives you the most remaining balance to benefit from a lower rate. If you’re already near the end of your loan term, the interest savings shrink because most of your remaining payments are going toward principal anyway.
It also helps to wait until your credit score has meaningfully improved. Even a 30 to 50 point jump can move you into a better rate tier. For context, the difference between a nonprime rate (around 14.49% on a used car) and a prime rate (around 9.98%) on a $15,000 balance over 48 months works out to roughly $1,600 in interest savings.
One more timing consideration: avoid refinancing right before you need to apply for a mortgage or other major loan. The hard inquiry and new account will temporarily affect your credit profile, which could matter if you’re on the edge of qualifying for something bigger.