Auto Loan Calculator

Estimate your monthly car payment with vehicle price, down payment, trade-in and sales tax — and see the true total cost of the loan.

Vehicle price ($)

Down payment ($)

Trade-in value ($)

Sales tax (%)

Interest rate (APR %)

Loan term

Monthly payment

—

Sales tax added—

Amount financed—

Total interest—

Total loan cost (payments)—

Total vehicle cost (all-in)—

Vehicle Sales tax Interest

Amount financed = price + sales tax − down payment − trade-in. Sales tax is applied to price minus trade-in (most states).

How your car payment is calculated

The amount financed uses the standard amortization formula M = P × r(1+r)ⁿ / ((1+r)ⁿ − 1). Most states tax the price after trade-in credit, which this calculator assumes — check your state's rule.

FAQ

What term should I choose?

Shorter terms (36–48 months) mean higher payments but much less interest and less time underwater on the car's value. 72–84-month loans lower the payment but often cost thousands more.

How much should I put down?

A common rule is 20% down on a new car (10% used) to offset first-year depreciation and avoid owing more than the car is worth.