Auto Loan Calculator

Estimated Monthly Payment
$0
–
$0
Amount Financed
$0
Total Interest
$0
Total Cost

🚗 Financing Summary

Vehicle Price–
Sales Tax–
Down Payment + Trade-In–
Amount Financed–

What Is an Auto Loan Calculator?

An auto loan calculator estimates your monthly car payment based on the vehicle price, down payment, trade-in value, sales tax, interest rate, and loan term — giving you a realistic number before you visit a dealership.

How to Use the Auto Loan Calculator

  1. Enter the vehicle price.
  2. Enter your down payment and any trade-in value.
  3. Enter your expected APR and loan term in months.
  4. Enter your local sales tax rate.
  5. Review your estimated monthly payment and total financing cost.

Auto Loan Formula

Amount Financed
Financed = (Price × (1 + Tax Rate)) − Down Payment − Trade-In
Monthly Payment
M = P × [r(1+r)^n] / [(1+r)^n − 1]
P = amount financed
r = monthly interest rate (APR ÷ 12)
n = loan term in months

Worked Example

Example: $32,000 Vehicle

Vehicle price: $32,000, sales tax 7% → $34,240 with tax

Down payment: $4,000, no trade-in

Amount financed: $30,240

Rate: 6.5% APR, term: 60 months

Result: a monthly payment of roughly $592, with about $5,261 in total interest.

Understanding Your Results

Amount Financed is what you're actually borrowing after tax, down payment, and trade-in are applied. Total Interest is the extra cost of borrowing over the loan term. A larger down payment or shorter term reduces both your interest paid and the risk of owing more than the car is worth.

Tips for a Better Auto Loan

  • Get pre-approved by a bank or credit union before visiting the dealership — it strengthens your negotiating position.
  • Avoid stretching the loan term just to lower the monthly payment; longer terms usually mean more total interest and higher risk of being "underwater."
  • Factor in sales tax, registration, and fees — they're often rolled into the loan amount.

Common Mistakes to Avoid

  • Focusing only on the monthly payment instead of the total cost of the loan.
  • Not shopping the interest rate separately from the vehicle price negotiation.
  • Ignoring how a low or negative trade-in equity affects the amount financed.

Frequently Asked Questions

The dealer or lender finances the vehicle price plus tax, minus your down payment and trade-in value, then applies the standard loan amortization formula using your interest rate and term.

A larger down payment reduces the amount financed, which lowers both your monthly payment and total interest paid, and helps avoid owing more than the car is worth.

Rates vary by credit score, lender, and whether the loan is for a new or used vehicle — borrowers with excellent credit typically qualify for the lowest advertised rates.

No — a longer term lowers the monthly payment but increases total interest paid and extends the time you're financially exposed to the vehicle's depreciation.

Often yes, if you finance the full out-the-door price including tax, title, and fees — this calculator lets you include your local sales tax rate.