Enter the negotiated price
Start with the vehicle selling price, down payment, rate, and term.
Auto Loan Calculator estimates the amount financed, monthly payment, total interest, payoff timing, and amortization of a vehicle loan while accounting for down payment, incentives, trade equity or negative equity, sales tax, and transaction fees.
Start with the vehicle selling price, down payment, rate, and term.
Enter trade value and trade payoff separately so negative equity is not hidden.
Choose the taxable basis and whether taxes and fees are financed or paid upfront.
Compare amount financed, interest, payoff timing, and the amortization schedule, not just the monthly payment.
For example, if the dealer offers $15,000 for your trade-in and the remaining loan payoff is $18,000, you owe $3,000 more than the vehicle is worth. That $3,000 is called negative equity. You can model paying the shortfall upfront or, if the new lender permits it, adding it to the new loan. Financing it increases the amount borrowed and typically increases the interest you pay.
If the trade-in is worth more than the loan payoff, the difference is positive equity that can reduce the amount financed. Sales tax is calculated separately using the taxable amount applicable to your transaction.
It is the modeled amount borrowed after the vehicle price, rebate, down payment, trade equity, and the selected tax-and-fee treatment are applied.
Because a $15,000 trade with an $18,000 payoff has $3,000 of negative equity. Combining those numbers would hide the amount being rolled forward.
Vehicle sales-tax rules vary by state and transaction. The calculator lets you choose full price, price less trade value, or a custom taxable amount so it does not invent a state rule.
Enter the contract interest rate used to calculate payments. APR is a broader disclosure measure that can include certain fees.
It can reduce the monthly payment, but it usually increases total interest and keeps the loan outstanding longer.
Advanced mode includes a separate Optional Add-ons field so products such as service contracts, GAP products, and dealer-installed items stay visible instead of being buried inside the vehicle price or fees.
The calculator can model either choice. Rolling negative equity forward increases the new amount financed and can increase interest. Paying it upfront increases the cash required at purchase but keeps that shortfall out of the new loan.
The model applies the entered extra amount to principal each month. Confirm your lender's payment-posting rules and any prepayment terms.
No. Those are important ownership costs but are outside the loan payment.
Bring the actual purchase worksheet and financing disclosure so the transaction can be reviewed with your broader plan.
Request a MeetingEducational Disclaimer: This calculator is not a loan offer, dealer worksheet, Truth in Lending disclosure, or legal or tax advice. Confirm the final price, taxes, fees, add-ons, APR, amount financed, and prepayment terms in your actual contract.