Auto Loan Calculator

Calculate your monthly car payment, including sales tax, down payment, and trade-in value. Enter the vehicle price and loan details to see the full breakdown.

Vehicle Price ($)

Down Payment ($)

Trade-In Value ($)

Sales Tax (%)

Interest Rate (% APR)

Loan Term (years)

$605.95

Monthly Payment

$30,240.00

Amount Financed

$2,240.00

Sales Tax

$6,116.85

Total Interest

$36,356.85

Total Paid

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Why use Auto Loan Calculator?

This calculator estimates a monthly car payment by first adding sales tax to the vehicle price, then subtracting any down payment and trade-in value to determine the amount financed, and finally applying standard loan amortization to compute the monthly payment and total interest.

Key benefits

Accounts for sales tax on the vehicle price
Subtracts down payment and trade-in from the amount financed
Shows total interest and total cost

Features

Sales tax calculation on vehicle price
Down payment and trade-in deduction
Standard amortization for the monthly payment

Popular use cases

Estimating a car payment before visiting a dealership
Comparing financing terms at different interest rates
Understanding how a trade-in reduces the amount financed

How to use Auto Loan Calculator

1
Enter the vehicle price
Enter the purchase price of the vehicle.
2
Enter down payment and trade-in
Enter any down payment and trade-in value to reduce the amount financed.
3
Enter tax, rate, and term
Enter sales tax percentage, interest rate, and loan term.

Frequently asked questions

How is sales tax factored in?

Sales tax is calculated as a percentage of the vehicle price and added to the amount financed, matching how most dealerships roll tax into the loan.

Does a trade-in reduce the loan amount?

Yes — the trade-in value (along with any down payment) is subtracted from the vehicle price plus tax to determine the amount financed.

Is this the same as a dealer's financing offer?

No, this is an independent estimate. Actual dealer financing may include additional fees or different tax treatment depending on your state.

Last reviewed: July 2026

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