Refinancing a car loan means replacing your current loan with a new one, usually at a lower interest rate

When you refinance, you pay off your existing car loan with money from a new loan. The new lender becomes your creditor, and you make payments to them instead. The main reason people refinance is to lower their monthly payment or reduce the total interest they'll pay over the life of the loan. This works when interest rates have dropped since you took out your original loan, or when your credit score has improved enough that lenders now offer you better terms.

Refinancing isn't free. You'll pay an process fee (typically $50 to $300), and some lenders charge document or title fees. You may also pay a prepayment penalty to your current lender if your original loan contract includes one — though many car loans don't. Before you refinance, you need to know whether the interest you'll save over the remaining loan term is larger than the fees you'll pay upfront.

Key Takeaways

  • Refinancing saves money only if your new interest rate is at least 1 to 2 percentage points lower than your current rate, because fees and the cost of a longer loan term can eat into savings.
  • Your credit score is the single biggest factor in what rate a lender will offer you; a score improvement of 50 to 100 points can drop your rate by 1 to 2 percentage points.
  • The closer you are to paying off your current loan, the less refinancing typically saves you, because you have fewer months of interest left to reduce.
  • Credit unions and online lenders often offer lower rates than banks, but you need to compare actual offers from multiple lenders rather than relying on advertised rates.
  • Extending your loan term to lower your monthly payment will cost you more in total interest, even at a lower rate.

When refinancing actually saves you money

The math of refinancing depends on three numbers: your current interest rate, the new rate you're offered, the fees you'll pay, and how many months remain on your loan. A lower rate only matters if the monthly savings add up to more than the fees.

For example, if you have 36 months left on a $15,000 loan at 8% interest, your monthly payment is roughly $461. If you refinance to 6% interest with $200 in fees, your new payment drops to about $443. You save $18 per month. Over 36 months, that's $648 in total savings — but only $448 after you subtract the $200 fee. That's still worth doing, but the benefit is smaller than the advertised rate difference suggests.

If you have only 12 months left on that same loan, refinancing makes almost no sense. You'd save $18 per month for 12 months ($216 total), but the $200 fee wipes out most of that gain. The fewer months remaining, the less refinancing helps.

How your credit score determines the rate you'll receive

Lenders use your credit score to decide what interest rate to offer you. A higher score means lower risk to the lender, so they charge you less interest. The difference is substantial: someone with a score of 750 might receive a rate of 4%, while someone with a score of 620 might receive 10% for the exact same car and loan amount.

If your credit score has risen since you took out your original loan — because you've paid bills on time, paid down other debts, or corrected errors on your credit report — refinancing can unlock a significantly better rate. A 50-point improvement in your score can sometimes lower your rate by 0.5 to 1 percentage point. A 100-point improvement might lower it by 1 to 2 percentage points.

You can check your credit score for free through AnnualCreditReport.com, which is the only federally authorized source for free credit reports. Many credit card companies and banks also show your score free of charge. Before you contact lenders, pull your own score so you know what range to expect.

Where to find refinancing offers and compare rates

Credit unions typically offer lower rates than banks, especially if you're a member. If you belong to a credit union, start there — many will refinance loans from other lenders. Online lenders like LendingClub, Upgrade, and SoFi often have competitive rates and faster approval timelines. Banks offer refinancing too, but their rates are frequently higher than credit unions or online lenders.

The advertised rates you see online are not the rates you'll receive. Lenders show their best rates to attract customers, but your actual rate depends on your credit score, income, employment history, and the age and mileage of your car. You need to get actual quotes from multiple lenders to compare.

When you request a quote, the lender will do a "soft pull" of your credit report — this doesn't hurt your score. If you move forward and they do a "hard pull" to finalize the loan, that temporarily lowers your score by a few points. Multiple hard pulls within a short window (usually 14 to 45 days, depending on the credit bureau) count as a single inquiry, so you can shop around without major damage.

The trade-off between monthly payment and total cost

One temptation when refinancing is to extend your loan term to make the monthly payment even smaller. If you currently have 36 months left and you refinance into a 60-month loan, your payment drops further. But you're now paying interest for 24 additional months, which costs you more in total interest even at a lower rate.

For example, refinancing a $15,000 loan from 8% over 36 months to 6% over 60 months drops your payment from $461 to $277 — a $184 monthly savings. But you pay $16,620 total instead of $16,596. You're paying $24 more overall to save $184 per month. That trade-off might make sense if you're in financial hardship and need the lower payment, but it's not a financial win.

Before you refinance, decide whether you want to lower your payment or lower your total cost. These are different goals, and they require different loan terms.

Prepayment penalties and other hidden costs

Some car loans include a prepayment penalty — a fee you pay if you pay off the loan early or refinance it. This penalty is written into your original loan contract. Before you refinance, contact your current lender and ask directly: "If I pay off this loan today, will I owe a prepayment penalty?" Get the answer in writing or note the name and date of the person who told you.

Prepayment penalties are less common than they used to be, but they do exist. If your loan has one, the penalty amount might be larger than the savings you'd get from refinancing, which means you shouldn't refinance.

Beyond prepayment penalties, watch for title transfer fees (usually $50 to $150) and document fees. Some lenders bundle these into the loan amount, so you finance them. Others charge them upfront. Ask each lender for a complete list of fees before you commit.

What happens to your current loan when you refinance

When your new lender approves your refinance, they send money directly to your current lender to pay off the remaining balance. Your old loan closes, and you stop making payments to that lender. You then make payments to the new lender instead. The entire process usually takes 7 to 10 business days from approval to funding.

During this transition, make sure you know when to stop paying your old lender and when to start paying the new one. Your old lender will send you a payoff statement showing the exact amount owed on a specific date. The new lender will tell you when they've funded the payoff and when your first payment to them is due. Missing a payment during the transition can damage your credit, so confirm these dates in writing.

Frequently Asked Questions

Will refinancing hurt my credit score?

Yes, but temporarily and minimally. The hard pull lenders do when you explore lowers your score by a few points. Multiple applications within 14 to 45 days count as one inquiry. Your score recovers within a few months, especially if you make on-time payments on the new loan. The long-term benefit of a lower interest rate usually outweighs the short-term score dip.

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

Being underwater means you owe more than the car is worth. Most lenders won't refinance underwater loans because they have no collateral cushion if you default. Some credit unions and specialized lenders will, but at higher rates. Contact your current lender or a credit union to ask about their underwater loan policy.

How soon after buying a car can I refinance?

Technically you can refinance when ready, but most lenders want to see at least 6 to 12 months of on-time payments on your current loan. This shows you're a reliable borrower. Some lenders will refinance sooner if your credit score has improved significantly or if interest rates have dropped sharply.

What if my current lender won't give me a payoff amount?

They're required to provide it. Call and ask for a payoff statement, which shows the exact amount owed on a specific date. If they refuse or give you trouble, file a complaint with your state's attorney general or the Consumer Financial Protection Bureau (CFPB). You have a legal right to this information.

Should I refinance if I only have a few months left on my loan?

Usually no. With fewer than 12 months remaining, the interest you'd save is typically smaller than the fees you'd pay. Calculate the exact savings using a refinance calculator, but in most cases it's not worth the effort.