Auto Loan Calculator
Calculate your monthly auto loan payment, total interest and payoff timeline from price, down payment, rate and term.
Loan Details
Loan Summary
About the Auto Loan Calculator
Financing a vehicle is one of the more common loans people take on, and the dealership’s monthly figure rarely tells the whole story. This auto loan calculator lets you work it out independently: enter the vehicle price, any down payment or trade-in, the APR you have been quoted, and the loan term, and it returns your monthly payment, the total interest you will pay, and the total cost of the car once financing is included.
Auto loans tend to be shorter than home loans, but interest still adds up — and longer terms are especially deceptive. Stretching a loan from four years to seven lowers the monthly payment but can dramatically increase the total interest, and may leave you owing more than the car is worth for much of that time. Use the calculator to compare terms side by side so you can see the real cost of a lower monthly payment.
It also makes a useful negotiating tool: by knowing the true payment for a given price and rate, you can spot when a dealer’s "great monthly deal" is simply a longer term in disguise. Everything is computed in your browser, with a downloadable PDF summary for comparing offers.
Looking for more options? Open the full Car Loan Calculator — it’s the same tool with every feature.
Frequently Asked Questions
What APR should I use in the auto loan calculator?
Use the annual percentage rate you have actually been quoted, since rates vary with credit score, loan term and whether the vehicle is new or used. If you are still shopping, try a range of rates to see how sensitive your payment is — even one or two percentage points can make a meaningful difference over the loan.
Does a longer auto loan term save money?
No — a longer term lowers the monthly payment but increases the total interest you pay, because you owe the balance for longer. It can also leave you "upside down," owing more than the car is worth. Compare a shorter and longer term in the calculator to see the trade-off clearly before deciding.
How do a down payment and trade-in affect my loan?
Both reduce the amount you need to finance, which lowers your monthly payment and the total interest. A larger down payment also reduces the risk of negative equity early in the loan. Enter your expected down payment or trade-in value to see the impact on your payment immediately.
Understanding Auto Loans
How auto loan interest works
Auto loans are amortising loans quoted with an APR — the annual percentage rate that bundles the interest and certain fees into one comparable figure. Interest is charged on the outstanding balance, so early payments are interest-heavy and the principal falls slowly at first. Because the APR you receive depends heavily on your credit score and whether the car is new or used, even a couple of points difference can change the total cost noticeably.
The hidden cost of long terms and negative equity
Stretching an auto loan to six or seven years makes the monthly payment look attractive but inflates the total interest and keeps you in debt longer. Worse, cars depreciate quickly, so a long loan can leave you "upside down" — owing more than the vehicle is worth — for much of the term. If you had to sell or it was written off, you would owe the gap. A larger down payment and a shorter term both reduce this risk.
New versus used and shopping the rate
Used vehicles cost less to buy but often carry higher interest rates, while new vehicles may qualify for promotional financing. The honest comparison is the total cost — price plus all interest — not the monthly payment alone. It also pays to get pre-approved by your own bank or credit union before visiting a dealer, so you have an independent rate to negotiate against.