🚗 Auto Loan Calculator

Calculate monthly car payments, total interest, and true cost of ownership for any vehicle loan.

🚗 Auto Loan Calculator

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Related Guide
How to Calculate Your Car Payment (True Cost of a Car Loan)
How trade-in, sales tax and loan term affect what a car really costs.
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What is the Auto Loan Calculator?

This calculator works out your monthly car payment and the true cost of financing a vehicle. Enter the vehicle price, down payment, trade-in value, sales tax rate, interest rate (APR), and loan term, and it returns the monthly payment, total loan amount, total interest, and total cost including tax — the full picture beyond just the sticker price.

How to Use It

Enter the vehicle price, any down payment and trade-in value, your local sales tax rate, the interest rate you've been quoted, and the loan term in months. Click "Calculate" to see the monthly payment, loan amount, total interest, and total cost. Try different loan terms and down payment amounts to see how each changes your monthly payment and total interest.

When to Use It

Use it before signing a car loan to check whether the dealer's quoted payment matches the math, when comparing offers from a bank or credit union against dealer financing, when deciding between a shorter term with a higher payment or a longer term that costs more in total interest, or when figuring out how much car you can actually afford.

Who Benefits

Car buyers negotiating financing terms, anyone comparing loan offers from multiple lenders, and first-time buyers who want to understand the real cost of a car loan beyond the advertised monthly payment.

Frequently Asked Questions

Monthly payment = P × [r(1+r)^n] / [(1+r)^n − 1], where P is the loan amount (car price minus down payment), r is the monthly interest rate (annual rate ÷ 12), and n is the loan term in months. This is the same formula used by all lenders.
Rates vary by credit score, loan term, and whether the car is new or used. With excellent credit (720+), new car rates are typically 4–6%; used car rates run 1–2% higher. Rates rise significantly for credit scores below 620. Manufacturer financing deals sometimes offer 0% APR.
Longer terms (72–84 months) mean lower monthly payments but significantly more total interest. A $25,000 loan at 6%: 36 months = $761/month ($2,396 total interest) vs 72 months = $415/month ($4,880 total interest). The 6-year loan costs $2,484 more overall.