Fast Car Market

Car payment calculator

See the monthly payment, total interest and full cost of a car loan, including sales tax and dealer fees.

Monthly payment

$0

Amount financed
$0
Total interest
$0
Total cost of the car
$0

How this calculator works

Sales tax is charged on the price minus your trade-in value, which is how most states handle it. A few states tax the full price, so check your state's rule if you're trading in a car.

The amount financed is the price plus tax and fees, minus your down payment and trade-in. The monthly payment uses the standard loan formula for a fixed-rate loan with equal monthly payments.

Using it at the dealership

  • Ask for the out-the-door price in writing, then enter it here instead of the sticker price.
  • Compare total cost, not just the monthly payment. A longer loan lowers the payment but usually raises what you pay overall.
  • If a dealer's payment is higher than this calculator shows for the same price and rate, ask what was added.