Auto Loan Calculator

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Work out your car loan monthly payment after down payment, trade-in and sales tax, plus the amount financed and total interest over the term. Free and instant.

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months
Monthly payment – per month
Amount financed –
Sales tax –
Total loan cost –
Total interest –
Sales tax is applied to the vehicle price minus the trade-in value. The amount financed is the taxed price minus your down payment and trade-in. Fixed-rate loan with equal monthly payments and no fees.

About Auto Loan Calculator

The Auto Loan Calculator estimates your monthly car payment from the vehicle price, your down payment, any trade-in value, the sales tax rate, the interest rate and the loan term in months. It also shows the amount financed, the sales tax amount, the total interest and the total cost of the loan.

Sales tax is applied to the vehicle price minus the trade-in value — the treatment used in many US states — and the amount financed is that taxed price minus your down payment and trade-in. The payment then follows the standard fixed-rate amortization formula over the chosen number of months.

Run the numbers before visiting a dealership: compare a 48-month against a 72-month term, see how a bigger down payment cuts total interest, and know what fits your budget before negotiating. Free, instant and browser-based.

How to use Auto Loan Calculator

  1. Enter the vehicle price you expect to pay.
  2. Add your down payment and any trade-in value.
  3. Set the sales tax percentage and the annual interest rate offered.
  4. Choose the loan term in months (for example 36, 48, 60 or 72).
  5. Review the monthly payment, amount financed, sales tax, total interest and total loan cost.

Frequently asked questions

Sales tax is applied to the vehicle price minus your trade-in, then the down payment and trade-in are subtracted from that taxed price. Whatever remains is the amount you borrow and pay interest on.

In this calculator, yes — tax applies to the price minus the trade-in value, which matches the rule in many US states. If your state taxes the full price, set the trade-in to zero and subtract it as a down payment instead.

A longer term lowers the monthly payment but raises total interest, because you borrow the money for more months. Compare a 48- and 72-month term in the calculator and check the total interest line before deciding.

Rates vary widely with credit score, loan term and whether the car is new or used — anywhere from around 5% to well over 10% APR. Enter the actual rate from your lender quote for a realistic payment.

No — they are estimates for planning, not financial advice. The math assumes a fixed rate, equal monthly payments and no fees; dealer financing may add documentation fees, add-ons or different tax handling.
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