10 Year Car Loan Calculator

What a 10 year car loan is, and where you will find one

A 10 year car loan is an auto loan with a 120 month term. It is twice the length of the 60 month loan most buyers take, and longer than the 72 or 84 month terms that sit at the edge of what mainstream banks and captives offer. The average new car loan at finance companies ran about 66 to 67 months in 2026, so a 120 month contract is far outside the norm.

That rarity matters in practice. Most prime lenders will not write a 120 month note on a car, because a car depreciates faster than a ten year loan amortizes. Loans that long do exist, mainly through subprime or buy here pay here dealers, and on vehicles that hold value longer than cars do, such as some RVs and boats. Where a lender does agree, the rate is usually above the bank average, because long unsecured style exposure to a depreciating asset is riskier for the lender.

So treat this page as two tools in one. It computes the payment and interest for a 120 month term you may be offered, and it shows the same loan at 60, 72 and 84 months so you can see what the long term buys and what it costs. The Consumer Financial Protection Bureau's auto loan guide puts it plainly: a longer loan lowers the monthly payment, raises the total interest, and extends the period in which you owe more than the vehicle is worth.

The payment formula behind the calculator

The loan amortizes like any installment loan: M = P × [ r(1 + r)ⁿ ] ÷ [ (1 + r)ⁿ - 1 ]. P is the amount financed, r is the annual rate divided by 12, and n is the number of months. Nothing about a 120 month term changes the formula; only the size of n grows, and with it the share of each early payment that goes to interest.

On the $40,000, 8%, 120 month reference case, the first payment carries $266.67 of interest and only $218.64 of principal. Over the first 12 payments, $3,102 of $5,824 goes to interest, 53% of the year. The balance falls slowly by design, so the loan needs a decade of payments to retire a balance that a 60 month loan clears in five years.

The amount financed matters as much as the term. It is the vehicle price plus sales tax and fees, minus the down payment, trade-in and rebate. Financing $40,000 instead of $34,000 raises every payment in this page proportionally, whatever the term, so read the tables as patterns and run your own numbers above.

Worked example: $40,000 financed at 8% across four terms

Take $40,000 financed at 8% APR and run it at 60, 72, 84 and 120 months. Every figure below comes out of the calculator on this page.

Stretching from 84 to 120 months cuts the payment by $138.14 a month, which is real breathing room in a tight month. The price is $5,868 of extra interest, more than a year of those savings, plus five extra years during which the loan can be underwater. Stretching from 60 to 120 months halves the payment but more than doubles the interest, from $8,663 to $18,237.

A second case shows the pattern holds at a smaller size. Finance $30,000 at 7.5% for 120 months and the payment is $356.11 with $12,733 of interest. At 60 months the same loan costs $601.14 a month and $6,068 in interest, so the long term saves $245 a month and costs $6,665 more in interest. The trade scales with the loan, not with the calendar.

What the rate does to a 120 month payment

Long terms amplify the rate, because interest accrues on the balance for twice as long. The average commercial bank rate on 60 month new car loans was 7.54% and on 72 month loans 7.17% in August 2026, per the Federal Reserve's G.19 consumer credit release. A 120 month quote, where one exists, typically prices above those averages.

Read the bottom row twice. A $50,000 loan at 8.5% over ten years costs $74,391 all in, meaning interest alone is nearly half the amount borrowed. One rate point, from 7.5% to 8.5% on that $50,000, adds about $3,170 of interest over the term. On a 60 month version of the same loan the same rate point adds about $1,436. The longer the term, the more the negotiation over a single percentage point is worth.

Extra monthly payments: the lever that fixes a long loan

If you do take a long term, paying extra is the cleanest repair. Extra money goes straight to principal, which shrinks every future interest charge. It also preserves the option of the low payment: if a month goes bad, you can fall back to the scheduled amount without penalty, which is the entire argument for taking the long term and paying it like a short one.

On the $40,000, 8%, 120 month loan, adding $50 a month pays it off in 104 months instead of 120 and cuts the interest from $18,237 to $15,546, a saving of $2,691. Add $150 a month and the payoff lands at month 82, close to an 84 month loan, at an interest cost between the two. Enter any extra amount in the calculator and it simulates the payoff month by month.

Before you rely on this, ask the lender two questions. Whether the loan carries a prepayment penalty, which is rare on consumer auto loans but not unheard of outside prime lending. And whether extra payments are applied to principal automatically or sit as an advance payment until you ask, which changes when the interest saving starts.

When 120 months makes sense, and when it does not

The case for a 120 month loan is narrow: a payment you can otherwise not make, on a vehicle that holds value unusually well, at a rate you have compared, with a firm plan to pay extra. That describes a small share of buyers. If the alternative is missing payments or losing the car, a payment that fits the budget protects you today, and extra payments can pull the total cost back down later.

The case against is arithmetic plus risk. The arithmetic is the tables above: $5,868 to $9,574 of extra interest on mid sized loans, and interest that exceeds principal for more than five years. The risk is negative equity, the CFPB's term for owing more than the car is worth. A new car commonly loses around 20% of its value in the first year, while a 120 month loan retires principal slowly, so the gap between what you owe and what the car is worth stays open for years. If the car is totaled or you need to sell, the difference comes out of your pocket, and gap insurance only covers part of the picture for part of the time.

A practical rule: shop the rate and the term as separate decisions. Get quotes at 60, 72 and 84 months from a bank or credit union before accepting dealer financing, check the average rates at the Federal Reserve G.19 so you know what normal looks like, and use the FTC's car shopping resources to keep the price negotiation apart from the financing negotiation. This page is an estimate, not financial advice.

How the balance falls over the 120 months

The defining feature of a 120 month loan is how slowly the balance moves. On the $40,000 reference loan, the first year of payments, $5,824 in total, retires only $2,722 of principal while $3,102 goes to interest. After two years the balance still stands at $34,330, and at the five year mark you still owe $23,935, which is 60% of what you borrowed on a loan that is half paid by count.

The crossover where a single payment carries more principal than interest arrives at payment 17, but the cumulative picture stays interest heavy for years: at the halfway point you have paid $13,053 in interest against $16,065 in principal, on a loan that ends with $18,237 of interest in total. That slow curve is the arithmetic behind the negative equity risk discussed earlier, and it is why a 120 month loan and a 60 month loan at the same rate differ far more than the payment alone suggests.

Extra payments compared: $0 to $150 a month

Because the rate applies to the remaining balance every month, each extra dollar works harder the earlier it arrives. The table runs the reference loan, $40,000 at 8% for 120 months, at four extra payment levels, with every extra dollar applied to principal and the scheduled payment left unchanged.

The pattern deserves a close read. The first $50 saves $2,691, the second $50 saves another $1,981, and the third saves $1,523, so each added block buys less than the one before, though every block outperforms a typical savings account. Notice what $150 does to the term as well: 82 months is shorter than the 84 month loan in the first table, at an interest cost of $12,041 against $12,370. A buyer who can find $150 a month therefore reproduces the shorter loan while keeping the right to fall back to $485.31 in a bad month. That fallback is the practical argument for taking the longer term and overpaying instead of signing the shorter contract from the start.