Credit unions often offer lower auto refinance rates than banks, but the rate you get depends on your credit score, the age of your car, and which credit union you join
A credit union is a member-owned financial institution that typically charges less interest on loans than banks do. When you refinance an auto loan through a credit union, you're replacing your current car loan with a new one from that credit union, usually at a lower interest rate. The credit union pays off your old loan, and you make payments to them instead.
Credit unions can offer lower rates because they're nonprofits — they return earnings to members rather than shareholders. However, the rate you're offered isn't the same for everyone. A person with a credit score of 750 might receive a rate around 4% to 5%, while someone with a score of 620 might see 8% to 10%. The age of your car, how much you still owe, and current market conditions also shift the rate.
Key Takeaways
- Credit union rates are typically 0.5% to 2% lower than bank rates for the same borrower, but you must be a member to borrow.
- Your credit score is the single biggest factor in the rate you receive — higher scores unlock lower rates.
- Most credit unions won't refinance cars older than 10 to 15 years or with more than 100,000 to 150,000 miles, depending on the union.
- The refinance process takes one to two weeks from process to funding, and you can often explore online or in person.
- Refinancing saves the most money when your current loan rate is at least 2% higher than the rate the credit union offers.
How credit union membership affects your rate
You cannot borrow from a credit union unless you're a member. Membership requirements vary widely. Some credit unions are open to anyone in a geographic area — for example, all residents of a county or city. Others are tied to an employer, school, or industry. A few accept members based on affiliation with a specific organization or association.
To join, you typically pay a small membership fee (often $5 to $25) and open a savings account with a minimum deposit (usually $25 to $100). Once you're a member, you can explore for loans. The membership itself doesn't change your rate, but it gives you access to the credit union's lending products. Some credit unions offer lower rates to members who maintain a certain savings balance or set up direct deposit, so ask about those discounts when you explore.
What determines the rate you're offered
Credit unions use the same factors banks do to set rates, but they often weight them differently. Your credit score is the primary driver. A score above 700 typically qualifies you for the credit union's best rates. Scores between 650 and 700 usually receive a moderate rate. Below 650, rates climb significantly, and some credit unions won't refinance at all below a certain score threshold.
The age and mileage of your car matter because older cars are riskier to lend against — they're more likely to need expensive repairs or fail entirely. Most credit unions won't refinance vehicles older than 10 to 15 years, though some go up to 20 years for well-maintained cars. Similarly, mileage limits typically range from 100,000 to 150,000 miles. A 2018 car with 80,000 miles will may have access to more easily than a 2015 car with 140,000 miles.
The loan-to-value ratio (how much you owe compared to what the car is worth) also affects your rate. If you owe $15,000 on a car worth $20,000, that's a safer loan than owing $15,000 on a car worth $16,000. You can check your car's value on Kelley Blue Book or NADA Guides. The lower your loan-to-value ratio, the better your rate.
Comparing credit union rates to what you have now
Before you refinance, find out your current loan rate. Check your loan documents, call your current lender, or log into your account online. Write it down. Then contact three to five credit unions and ask for a rate quote. Most credit unions offer free quotes without a hard credit pull, meaning they won't damage your credit score. Some quote rates online; others require a phone call or in-person visit.
The math is straightforward: if a credit union offers you a rate at least 1% to 2% lower than your current rate, refinancing usually makes sense. For example, if you owe $20,000 at 7% and a credit union quotes you 5%, you'll save roughly $2,000 over the life of a five-year loan. However, if you're only a year or two away from paying off your current loan, refinancing may not save enough to justify the paperwork and time.
Also check the loan term the credit union is offering. A longer term (like 72 months instead of 60) lowers your monthly payment but increases total interest paid. A shorter term raises your monthly payment but saves money overall. Ask the credit union to show you the total interest you'll pay over the full term, not just the monthly payment.
The refinance process and approval process
Most credit unions let you start an process online or by phone. You'll need your driver's license, Social Security number, current loan information (account number and lender name), and proof of income (recent pay stub or tax return). The credit union will pull your credit report, which is a hard inquiry and will lower your score by a few points temporarily.
The credit union will verify the car's details — make, model, year, mileage, and vehicle identification number (VIN). They may order a vehicle history report from Carfax or AutoCheck. If the car doesn't meet their age or mileage requirements, they'll decline. If it does, they'll make you an offer with a specific rate and term.
Once you accept the offer, the credit union orders a title search and prepares loan documents. This stage typically takes three to five business days. You'll sign documents either online, by mail, or in person at a branch. The credit union then pays off your old loan directly and sends you the new loan documents. The entire process from process to funding usually takes one to two weeks.
Costs and fees to watch for
Credit unions typically charge fewer fees than banks, but some fees do exist. Common ones include an process fee (usually $0 to $50), an appraisal fee if the credit union orders one (typically $100 to $200), and a title search fee ($25 to $75). Some credit unions waive these fees for members or for loans above a certain amount.
Ask about prepayment penalties before you sign. Most credit unions allow you to pay off your loan early without penalty, but a few charge a fee if you refinance or pay in full within the first year or two. If you think you might pay the car off early or refinance again, confirm there's no penalty.
One hidden cost to consider: if you're refinancing a loan you're underwater on (you owe more than the car is worth), some credit unions will refinance the full amount, but you'll pay interest on money that exceeds the car's value. This is riskier for you and should be a last resort.
When refinancing makes sense and when it doesn't
Refinancing works best if you have a credit score of 650 or higher, your car is less than 10 years old with under 120,000 miles, and your current rate is at least 2% higher than what the credit union offers. You should also plan to keep the car for at least another two to three years — if you're selling it soon, the savings won't justify the effort.
Refinancing doesn't make sense if your current loan is nearly paid off, your car is very old or has very high mileage, your credit score has dropped significantly since you took out the original loan, or the credit union's rate is only slightly lower than your current rate. In those cases, the time and paperwork involved won't deliver enough savings.
If your credit score is below 650, you may still find a credit union willing to refinance, but the rate won't be much better than your current loan. In that situation, focus on paying down the principal and rebuilding your credit score over the next 6 to 12 months, then refinance later.
Frequently Asked Questions
Do I need to have my car paid off to refinance it?
No. You refinance a car loan you're still paying on. The credit union pays off your old lender and gives you a new loan. You must own the car outright or have the lender's permission, but the car doesn't need to be paid off.
Will refinancing hurt my credit score?
A hard credit inquiry will lower your score by a few points temporarily. However, refinancing can improve your score over time if it lowers your overall debt or improves your payment history. The temporary dip usually recovers within a few months.
Can I refinance if I'm behind on my current loan?
Most credit unions won't refinance if you're currently behind on payments. Bring your account current first, then wait a few months to show a clean payment history before explore. Some credit unions may refinance if you're only one or two payments behind, so ask.
What if my credit union denies my process?
The most common reasons are a credit score below the union's minimum, a car that's too old or has too much mileage, or a loan-to-value ratio that's too high. Ask the credit union which factor caused the denial. You can reapply after improving your credit score or waiting for your car to age out of their restrictions.
How much money will I actually save by refinancing?
Use an auto loan calculator to compare your current loan to the credit union's offer. Enter your current balance, rate, and remaining term, then enter the credit union's rate and term. The calculator will show you the total interest difference. Most people save between $500 and $3,000 depending on the loan size and rate difference.