The Smart Calc

Auto Loan Calculator

Compute car monthly payments, total interest, sales tax, and net amount financed with customizable trade-in tax rules.

Parameters

$
$
$
%

Tax is calculated on Net Purchase Price (Vehicle Price minus Trade-In Value). Standard in most US states.

%
mo

Results

Monthly Payment

$563.93

Net Amount Financed

$29,240.00

Sales Tax Amount

$2,240.00

Total Interest Paid

$4,595.95

Total Vehicle Cost

$33,835.95

How Auto Loan Calculations Work

How It Works

Computes sales tax based on your jurisdiction's trade-in tax rules (either net price after trade-in or full sticker price), subtracts down payments and trade-in value to determine net financed amount, then amortizes payments over the loan term.

How to Use

1. Enter the vehicle price, cash down payment, and trade-in allowance. 2. Set your sales tax rate and toggle the trade-in tax credit according to your state rules. 3. Input interest rate and loan term to review monthly payments and financing costs.

Understanding the Results

Net Amount Financed is the total balance borrowed after applying down payments, trade-in value, and sales taxes. Total Interest is the cumulative cost of borrowing.

Auto Loan FAQ

FAQ

Does trade-in value reduce sales tax in all jurisdictions?

No. While most US states offer a trade-in tax credit (charging sales tax only on the net difference), some states (such as California, District of Columbia, Maryland, and Virginia) and certain countries charge sales tax on the full vehicle purchase price before trade-in allowance.

What is a typical auto loan term?

Common loan terms range from 36 to 72 months. Shorter terms save interest, while longer terms lower monthly payments.