A 15-year car loan stretches your payments over 180 months, lowering what you pay each month but raising the total interest you'll pay over the life of the loan
A 15-year auto loan is a loan term that runs for 180 months instead of the more common 36, 48, or 60 months. The longer timeline means your monthly payment drops — sometimes by $100 or more compared to a shorter loan on the same car — but you pay significantly more in total interest because the lender charges interest for twice as long. Most people choose 15-year loans because they need the monthly payment to fit their budget, not because the total cost is lower.
The trade-off is real: a $25,000 car financed at 6% interest costs roughly $483 per month over 60 months and about $1,500 in total interest. The same car over 15 years costs roughly $198 per month but about $10,700 in total interest. You save $285 a month but pay an extra $9,200 over the life of the loan.
Key Takeaways
- A 15-year car loan lowers your monthly payment but increases your total interest cost by thousands of dollars compared to a 5 or 7-year loan.
- You will still owe money on the car long after it stops being reliable, which means you may be paying a loan on a car that needs expensive repairs.
- Interest rates on 15-year loans are typically higher than rates on shorter loans from the same lender, which makes the total cost even higher.
- If your budget only allows a 15-year loan, a less expensive car with a shorter loan term may cost you less overall than stretching the payments.
How much total interest you'll pay on a 15-year loan
The total interest depends on three things: the amount you borrow, the interest rate, and how long you take to repay it. A $20,000 loan at 5% interest over 15 years costs about $8,000 in interest. The same loan at 7% costs about $11,000 in interest. A $30,000 loan at 6% costs about $15,900 in interest.
Lenders typically charge higher interest rates for longer loans because they are taking on more risk — the longer the loan, the more time something could go wrong. You might lose your job, the car might break down, or you might want to sell it. A 15-year loan from a bank or credit union often carries a rate 0.5% to 1.5% higher than a 5-year loan to the same borrower. This rate difference adds thousands more to your total cost.
You can use an auto loan calculator to see the exact numbers for the car price, down payment, interest rate, and loan term you're considering. Most lenders' websites have one built in.
The risk of owing more than the car is worth
Being underwater on a loan means you owe more than the car is worth. With a 15-year loan, this is common for the first several years. A new car loses about 20% of its value in the first year and continues to depreciate. If you finance a $25,000 car with a small down payment, the car might be worth $18,000 after two years — but you could still owe $22,000.
This matters if the car is damaged or totaled in an accident. Your insurance will pay you what the car is worth, not what you owe. If you owe $22,000 and the car is worth $18,000, you still have to pay the $4,000 difference. This is why lenders require you to carry collision and comprehensive insurance on financed cars — they want to protect their investment.
Being underwater also traps you. If you want to sell the car or trade it in, you have to pay the difference out of pocket, or roll it into a new loan (which means you start your next loan already behind).
When the car will need expensive repairs while you're still paying for it
Most cars run reliably for about 5 to 7 years or 60,000 to 100,000 miles. After that, repairs become more frequent and more expensive — transmission work, engine problems, suspension issues. With a 15-year loan, you'll still be making payments when the car is 8, 10, or even 12 years old and well past its reliable years.
A $500 repair is annoying. A $2,000 transmission repair while you're still paying $200 a month on the loan is a real hardship. Many people in this situation end up taking out another loan or using a credit card to cover the repair, which means they're now paying for two cars at once.
This is one reason financial advisors often suggest buying a less expensive car with a shorter loan term instead. A $15,000 car financed over 5 years might have a higher monthly payment than a $25,000 car over 15 years, but you'll own it free and clear while it's still reliable.
How a 15-year loan affects your credit and borrowing power
A car loan appears on your credit report and affects your credit score. The loan itself is not bad for your credit — in fact, having different types of credit (a car loan, a credit card, maybe a mortgage) can help your score. What matters is whether you pay on time.
However, a 15-year loan ties up your borrowing power for a long time. Lenders look at your debt-to-income ratio — how much you owe each month compared to how much you earn. A $200 monthly car payment reduces how much you can borrow for a house, another car, or other needs. If you want to buy a home in the next few years, a 15-year car loan could lower the amount a mortgage lender will offer you.
Situations where a 15-year loan might make sense
A 15-year loan is rarely the best financial choice, but it can be the right choice in specific situations. If you have a stable, long-term income and your budget genuinely cannot fit a 5 or 7-year payment, a 15-year loan lets you drive a reliable car instead of buying an older, less safe vehicle with cash or a risky subprime loan.
A 15-year loan also makes more sense if you plan to keep the car for its entire lifespan and drive it until it's no longer worth repairing. If you're the type of person who buys a car and keeps it for 12 or 15 years anyway, the long loan term aligns with your actual use.
If you have a very low interest rate — under 3%, which is rare but possible if you have excellent credit and shop around — the total interest cost is lower, and the monthly payment savings become more meaningful.
Alternatives to a 15-year loan
If your budget is tight, consider a less expensive car with a shorter loan term. A $15,000 car financed over 5 years at 6% costs about $290 per month and $1,600 in interest. A $25,000 car over 15 years costs about $198 per month but $10,700 in interest. The monthly difference is only $92, but you save $9,100 in total interest and own the cheaper car free and clear in 5 years instead of 15.
You could also increase your down payment if you have savings available. Putting down $5,000 instead of $2,000 reduces the amount you need to borrow and lowers both your monthly payment and total interest, even on a shorter loan term.
Another option is to wait and save more before buying. If you can delay the purchase by a year or two and build a larger down payment, you'll borrow less and can afford a shorter loan term.
Frequently Asked Questions
Can I pay off a 15-year car loan early without a penalty?
Most car loans allow you to pay extra toward principal without penalty, and some let you pay off the entire loan early. Check your loan documents or call your lender to confirm there is no prepayment penalty. Paying extra when you can reduces the total interest you pay and gets you out of debt faster.
What interest rate should I expect on a 15-year car loan?
Interest rates vary by lender, your credit score, the car's age, and current market conditions. Rates typically range from 4% to 10% or higher depending on these factors. Shop around with banks, credit unions, and online lenders — the difference between a 5% and 7% rate adds thousands to your total cost over 15 years.
Is a 15-year loan worse than a subprime auto loan?
A subprime loan (for people with poor credit) often carries interest rates of 15% to 25% or higher, which is far worse than a 15-year loan at a standard rate. If your only options are a 15-year loan at 6% or a subprime loan at 18%, the 15-year loan is the better choice. But if you have time to improve your credit or save for a larger down payment, doing so first could save you even more.
What happens if I can't make the payment on a 15-year car loan?
Contact your lender when ready if you know you'll miss a payment. Many lenders offer forbearance (temporarily pausing payments) or loan modification (changing the terms). Missing payments damages your credit score and can lead to repossession, where the lender takes the car back. The sooner you reach out, the more options you may have.
Should I refinance my 15-year car loan to a shorter term?
If your credit score has improved since you took out the loan, or if interest rates have dropped, refinancing to a shorter term could save you money. Compare the new loan's interest rate, fees, and remaining term to your current loan. Refinancing makes sense only if the new loan's total cost is lower than what you'd pay if you kept the original loan.