Auto Loan Calculator

Estimate your monthly car payment, total interest, and out-the-door cost. Includes sales tax on the vehicle price.

Monthly Payment

Principal $0
Total Interest $0
Sales Tax $0
Total Cost (price + interest + tax) $0

How this auto loan calculator works

This tool computes your monthly payment using the standard amortizing-loan formula. The loan principal is:

Principal = Vehicle Price − Down Payment − Trade-in + (Vehicle Price × Sales Tax %)

Note: this is a simple sales-tax model — it taxes the full vehicle price. Some states (e.g. CA, NY) reduce the taxable basis by the trade-in value, while others tax the difference. For a state-accurate quote, check your DMV's worksheet.

For a 60-month loan, longer terms (72, 84 months) lower the monthly but cost much more in total interest. Compare with the term buttons above.

Show the math

Related calculators

→ Mortgage Calculator — same amortization math, just a much longer term and bigger principal.
→ Compound Interest Calculator — the opportunity cost of financing: what that down payment could grow into.