Auto Loan vs Personal Loan: Which Should You Use for a Car?

By Nathan Hays · Updated July 31, 2026

For most car purchases, an auto loan is the cheaper option. It is secured by the vehicle, which lowers the lender's risk and usually gets you a lower rate than an unsecured personal loan. A personal loan can still be the better fit in specific cases, like an older or private-sale car a lender won't finance. To compare the two on your own figures, use the free loan calculator.

Secured vs unsecured: why it drives the rate

An auto loan is secured: the car is collateral. If you stop paying, the lender can repossess and sell it to recover what it's owed. That safety net lowers the lender's risk, and lower risk generally means a lower interest rate for you.

A personal loan is unsecured: there is no asset backing it. The lender is relying on your promise to repay and your credit history. Because there's nothing to repossess if things go wrong, the lender charges more to cover that added risk. This is the single biggest reason personal loans usually carry higher rates than auto loans for the same borrower.

What each one means if things go wrong

The rate gap is the visible half of the secured-versus-unsecured difference. The other half only shows up if payments stop, and it is worth understanding before signing either agreement.

On a secured auto loan the lender is recorded as lienholder on the title, so it holds a legal claim against the car until the loan is cleared. If the loan goes into default, the lender can repossess and sell the vehicle. The sale does not always end the debt: if the car brings in less than the outstanding balance, the shortfall is a deficiency balance and the borrower can still be pursued for it. To put a number on the balance side of that, on a $20,000 loan at 7% over 60 months there is still $12,825.82 owed after two years of on-time payments, and $8,845.23 after three. A car selling for less than whichever figure applies leaves the remainder outstanding.

On an unsecured personal loan there is nothing to repossess, so the car itself is never at risk over that loan. What replaces repossession is collection activity, reporting to credit bureaus, and in some cases a suit for the balance. Neither path is a soft landing; they simply fail in different directions. The trade being made is a lower rate in exchange for the lender holding a direct claim on the asset.

Typical term ranges

The two loan types also tend to differ on length:

A longer term lowers the monthly payment but raises the total interest you pay, because you're borrowing for more months. The auto loan calculator or personal loan calculator lets you switch the term between years and months to see that trade-off directly.

A worked example: the same $20,000 over 60 months

The clearest way to see the cost of that rate gap is to hold everything else equal. Below is the same $20,000 borrowed over 60 months (5 years) at two illustrative rates. These rates are examples chosen to show the effect of the secured-vs-unsecured gap, not quoted averages. The payments are computed with the standard amortization formula the calculator uses.

At these example rates the personal loan costs about $49 more each month and roughly $2,930 more in total interest over the five years, on an identical $20,000 loan. The only thing that changed is the rate, and the rate changed because one loan is secured and the other isn't. Swap in your own numbers to see the gap for your situation.

The gap shrinks on smaller, shorter loans

Five points of rate on $20,000 over five years adds up to real money. The same five points on a small, short loan does not. Holding everything else identical but dropping to $6,000 over 36 months:

Here the personal loan costs about $14 more a month and $504.84 more in total. That is still real money, but it is small enough that other factors can reasonably outweigh it, such as whether the car qualifies for financing at all. The rate gap matters most when the balance is large and the term is long, because both of those multiply it.

Term length moves more money than you might expect

Before comparing loan types it is worth seeing how much the term alone changes the picture. The same $20,000 auto loan at the same 7%, at four different lengths:

Stretching from 36 to 72 months cuts the payment by $276.56 and roughly doubles the interest, from $2,231.51 to $4,550.57. That $2,319.06 swing is comparable to the entire $2,931.90 rate gap in the earlier example, and unlike the rate, the term is a choice you control directly.

Can a shorter personal loan beat a longer auto loan?

That last point invites an obvious test, so here it is run properly rather than assumed. The same $20,000: an auto loan at 7% over 60 months against a personal loan at 12% squeezed into 36 months.

It does not win. The personal loan costs $268.26 more every month and still finishes $152.86 higher in total interest. Three years of 12% on a balance that falls quickly comes to nearly the same money as five years of 7% on a balance that falls slowly, and the payment is far heavier the whole way. Shortening the term narrows the gap dramatically, from $2,931.90 down to $152.86, but at these example rates it does not close it.

When a personal loan makes sense anyway

The lower rate isn't the whole story. A personal loan can be the right call when:

• The car won't qualify. Lenders often won't write an auto loan on a very old or high-mileage vehicle, or on a private-party sale. A personal loan doesn't care what you spend it on.
• You want to own the title outright. With an unsecured loan there's no lien on the car, so it can't be repossessed over the loan and you hold a clear title.
• You're bundling costs. If you need to cover repairs, registration, or other expenses beyond the sticker price, a personal loan's flexibility can be simpler than piecing several things together.
• The amount is small. On a low balance the dollar difference from a higher rate may be modest, and the convenience can outweigh it.

The trade-off is almost always a higher rate, so it's worth pricing both. Run the personal-loan rate and the auto-loan rate through the calculator and compare the total interest before you decide.

Compare the APR, not just the rate

One more thing can flip this comparison, and it is not the rate. Personal loans more often carry an origination fee, frequently deducted from the money before it reaches you, while auto loans more often roll their costs into the financed amount. A fee does not change the monthly payment, so it stays invisible in a payment-to-payment comparison, but it is a genuine cost of borrowing. The APR is the number that folds it in. Comparing an auto loan's APR against a personal loan's APR, at the same amount and the same term, is the apples-to-apples version of this whole page. The page on APR vs interest rate works through a case where the loan with the lower headline rate ends up costing $261.81 more.

Further reading: CFPB: auto loans; CFPB: personal installment loans.

More loan guides

• How loan payments work: amortization, interest & payoff
• APR vs interest rate: what the difference costs you
• Loan terms glossary: 30 borrowing terms explained
• How to pay off a loan faster
• Loan calculator FAQ

This guide is general information, not financial advice. The 7% and 12% figures are illustrative examples, not quoted rates. Confirm all figures with your lender.