Auto Loan Calculator
Calculate your auto loan monthly payment, total interest, and payoff date. See how down payment and loan term affect your car financing cost.
Auto Loan Financing: Payment vs Total Cost
Dealers often focus on monthly payment — 'only $399/month!' — while stretching the loan term to make it work. That strategy hides the true cost. A $32,000 car at 7.25% over 7 years costs thousands more in interest than the same loan over 4 years, even though the monthly payment is lower on the longer term.
This auto loan calculator shows both the monthly payment and total interest so you can make an informed financing decision. Enter your vehicle price, down payment, rate, and term to see the full picture.
A larger down payment is one of the most effective ways to reduce auto loan cost. It lowers your financed amount, reduces interest, and helps avoid negative equity — owing more than the car is worth if you need to sell or trade early.
Before signing, compare the dealer's offer against pre-approval from your bank or credit union. Use the APR Calculator if either option includes fees. And run the Budget Calculator to confirm the payment leaves room for debt payoff and savings.
How These Calculations Work
Transparent methodology — no black boxes. Here's exactly what happens when you use this calculator.
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Enter vehicle price, down payment, APR, and loan term.
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Financed amount = vehicle price minus down payment.
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Monthly payment uses standard auto loan amortization.
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Total interest and payoff timeline are calculated from the full schedule.
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Compare terms to see how a longer loan lowers payment but increases total cost.
Frequently Asked Questions
Car loans use fixed-rate amortization on the amount financed (vehicle price minus down payment and trade-in).
Shorter terms (3–4 years) have higher payments but much less total interest. Longer terms (6–7 years) lower payments but increase total cost and risk of being upside-down.
More down payment reduces the financed amount, lowering both monthly payment and total interest. It also reduces the risk of owing more than the car is worth.
Compare APR offers using this calculator — the lowest effective APR wins. Check for dealer markup and origination fees with the APR Calculator.
Include your car payment in the Budget and DTI calculators to ensure new borrowing doesn't block debt payoff progress.