How to use this auto loan calculator
Enter the vehicle price and any destination charge, then your sales tax rate, doc fee and tag/registration fee. Add your trade-in value (and any remaining payoff on it) and your down payment. Finally set your APR and loan term. The Loan Summary updates live with your amount financed and monthly payment.
Use the Extra Monthly Principal field in the amortization section to see how paying a little more each month shortens the loan and cuts total interest.
Why tax, fees and trade-in matter
A car's sticker price is rarely what you finance. The amount that actually gets a payment attached to it is:
- Vehicle price + destination — the negotiated cost of the car.
- + Sales tax — charged on the taxable amount (often reduced by your trade-in in many states).
- + Doc and tag fees — dealer documentation and registration.
- − Trade-in credit and down payment — money that reduces what you borrow.
Choosing a loan term
Stretching to 72 or 84 months lowers the monthly payment but you pay more interest overall and stay "underwater" longer — owing more than the car is worth. A shorter term costs more per month but far less in total. Compare terms in the calculator before you sign.
Frequently asked questions
How is a car loan payment calculated?
It's the amount financed (price + tax + fees − trade-in − down payment) amortized over your term at your APR — so it reflects the real out-the-door cost, not just the sticker price.
Does this include sales tax and dealer fees?
Yes — it adds sales tax, doc and tag fees, and subtracts trade-in and down payment, which most basic calculators skip.
Is a longer term cheaper?
Lower monthly, higher total interest, and more time underwater. Compare 60/72/84 months to see the trade-off.
How much do extra payments save?
Enter an extra monthly principal amount to see the months and interest saved in the schedule.
Related calculators & guides
This calculator is for educational and planning purposes only and provides estimates, not financial advice. Tax rules and dealer fees vary by state and lender. See how we calculate.