💰 Personal FinanceAuto Loan Calculator

Auto Loan Calculator

Calculate your car loan monthly payment with trade-in, down payment, and sales tax.

UPDATED · MAY 2026
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Monthly payment
$553/mo
LOAN AMOUNT$32,450
SALES TAX$2,450
TOTAL COST$39,833
Loan amount
$32,450
Total interest
$7,383
Total cost
$39,833
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How to use the Auto Loan Calculator

  1. 01
    Enter the vehicle price. The negotiated price before tax.
  2. 02
    Add down payment and trade-in. Both reduce the amount you finance.
  3. 03
    Set tax, rate, and term. Sales tax is added to the financed amount; pick your APR and term.

How is it calculated?

The loan amount is the price plus sales tax, minus your down payment and trade-in value. That amount is amortized at your APR over the term using the standard fixed-payment formula, giving the monthly payment, total interest, and total cost.

Frequently asked

The questions readers ask most about the auto loan calculator.

This tool adds tax to the loan, which is common. Paying tax in cash upfront instead lowers the amount financed and the interest you pay.