Auto Loan Calculator
Estimate your monthly car payment and total interest.
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About the Auto Loan Calculator
Work out your monthly car payment before you step onto the lot. Enter the vehicle price, your down payment and trade-in, the sales tax rate, the APR, and the loan term in months — the calculator returns your monthly payment, the amount financed, and the total interest you'll pay over the life of the loan. Comparing a 48-month vs 72-month term or a higher down payment takes seconds, so you can see exactly how each choice changes the payment and total cost.
How to use the Auto Loan Calculator
- 01Enter your vehicle price, down payment, trade-in, sales tax, interest rate, and term.
- 02Read the result instantly — it recalculates as you type.
- 03Adjust the numbers to model different scenarios.
Frequently asked questions
How is a car payment calculated?
The amount financed (price + tax − down payment − trade-in) is amortized over the term at your APR, giving a fixed monthly payment of principal and interest.
Should I choose a longer term?
A longer term lowers the monthly payment but raises total interest and the risk of being 'underwater'. Compare terms here to see the trade-off.
Does it include sales tax?
Yes — enter your local sales-tax rate and it's added to the financed amount (most states tax the price minus trade-in).