Auto Loan Calculator
Enter vehicle price, down payment, trade-in, sales tax, annual loan rate and term to estimate the financed amount and monthly payment.
Calculator arithmetic runs locally in your browser and does not require an API.
The interactive calculator loads here when JavaScript is enabled.
How to use Auto Loan Calculator
Use the net trade-in amount you intend to apply. Enter zero tax if it will be paid separately rather than financed.
Formula and method
Financed amount = price + price × tax rate − down payment − trade-in. Apply the monthly fixed-rate loan formula to that principal.
Understanding the results
Tax is calculated on the full vehicle price before deductions. Local trade-in tax credits, outstanding trade-in debt and dealer fees are not modeled; verify local treatment.
Worked example
A 20,000 vehicle, 2,000 down, 3,000 trade-in and 5% sales tax gives 1,000 tax and 16,000 financed. At 0% for 60 months, the regular payment is 266.67.
These are mathematical estimates, not financial advice or an offer of credit.
Frequently asked questions
Is the trade-in deducted before tax?
No. This model taxes the full price; local trade-in credits may produce a different amount.
Can I finance the sales tax?
The entered tax is included in the financed amount. Enter zero if tax is paid separately.
Is an existing trade-in loan included?
No. Outstanding trade-in debt must be handled separately.