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Money Metric Hubs Precision Finance
LOANS & MORTGAGES CHANNEL

Auto Loan Calculator

Calculate car loan parameters, trade-in value deductions, and vehicle sales tax burdens.

Calculator Variables

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Calculation Overview

Model your car loan terms easily. Calculate monthly payments, sales tax impacts, trade-in valuations, and total costs.

Mathematical Model & Formula

Loan Principal = Price + Tax - DownPayment - TradeIn

Vehicle tax is added up front to the sticker price, and cash contributions or trade-ins are subtracted. This final principal is then amortized standardly.

Variables Defined:
  • Price: Original car sticker price
  • Tax: Sticker Price * Sales Tax Rate
  • DownPayment: Up-front cash contribution
  • TradeIn: Agreed trade-in value of old car

Worked Example Scenario

Scenario: A $30,000 vehicle with a 7% sales tax, $5,000 down, and $2,000 trade-in.

  1. Vehicle purchase tax = $30,000 * 0.07 = $2,100
  2. Calculate loan principal: $30,000 + $2,100 - $5,000 - $2,000 = $25,100

Result: The final loan amount to be financed is $25,100.

Frequently Asked Questions

Can I finance taxes and registration?

Yes. Most lenders allow buyers to roll vehicle sales tax, title charges, and dealer fees directly into the auto loan, though this increases interest costs.

Academic & Regulatory References