What is an auto loan calculator?
An auto loan calculator is a quick car payment calculator that turns a vehicle price, interest rate and loan term into a clearmonthly payment. Instead of guessing at the dealership, you can plug in real numbers and instantly see what a car will cost each month and how much interest you will pay over the full loan. It is the same math whether you are buying new or used, financing through a bank, a credit union or the dealer itself.
How to use this car payment calculator
- Vehicle price, the agreed sticker or out-the-door price of the car before tax.
- Down payment, the cash you are paying up front.
- Trade-in value, what the dealer is crediting you for your old vehicle.
- Sales tax, your state and local sales tax rate as a percentage (leave it at 0 if tax is paid separately).
- Loan term, how many months you will repay over. Common car loans run 36, 48, 60 or 72 months.
- APR, the annual percentage rate your lender or dealer quotes.
The results update instantly as you type. You will see your estimated monthly payment, the total of all payments over the life of the loan, the total interest you will pay, and the amount actually financed after your down payment and trade-in are applied.
How car loan payments are calculated
An auto loan is a fixed-rate amortizing loan, just like a mortgage. First the calculator works out theamount financed: it takes the vehicle price, adds sales tax, then subtracts your down payment and trade-in. That balance is then spread across every month of your term using your APR. Each monthly payment is the same dollar amount, but its makeup shifts over time. Early on, a larger share of each payment is interest because the balance is high; as you pay the loan down, more of each payment goes to principal. The amortization schedule below the results shows exactly how that split changes for the first twelve months, and you can print or save it for your records.
Car payment example
Say you finance a 25,000 dollar car with a 5,000 dollar down payment, no trade-in, a 6 percent APR and a 60-month term. The amount financed is 20,000 dollars, which works out to roughly a 387 dollar monthly car payment and about 3,200 dollars in total interest. Bump the term to 72 months and the monthly payment drops, but you pay more interest overall. Trying a few combinations in the car loan calculator is the fastest way to see how price, APR and term trade off against each other before you sign anything.
Tips to lower your car payment
- Bigger down payment: putting more cash down reduces the amount financed and the interest you pay.
- Shorter term: a 48-month loan costs more per month than a 72-month loan, but far less in total interest.
- Better APR: shop your rate with banks and credit unions before financing at the dealer, even one point of APR adds up.
- Use your trade-in: applying a trade-in directly cuts the financed balance.
Frequently asked questions
How is my monthly car payment calculated?
It uses the standard amortization formula on the amount financed at your APR over the number of months in your term. The amount financed is the vehicle price plus sales tax, minus your down payment and trade-in.
Does a trade-in lower my loan?
Yes. Your trade-in value and down payment are both subtracted from the financed amount, which lowers both your monthly payment and the total interest you pay.
Is sales tax included in the loan?
In most states sales tax is added to the price and can be rolled into the loan. Enter your state and local sales tax rate and the calculator adds it to the amount financed. Set it to 0 if you are paying tax separately.
What is a good interest rate for a car loan?
A good auto loan APR depends on your credit score and whether the car is new or used. Buyers with strong credit often see single-digit rates, while lower scores pay more. Compare quotes from banks and credit unions, then use this car payment calculator to see how each APR changes your monthly payment.
This tool is for general information only and is not financial advice.
Related: Loan & Mortgage Calculator, Simple Interest Calculator, Compound Interest Calculator.