Auto Loan Calculator
Estimate your monthly car payment and total interest.
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
- 1Enter your vehicle price, down payment, trade-in, sales tax, interest rate, and term.
- 2Read the result instantly — it recalculates as you type.
- 3Adjust 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).