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Auto Loan Calculator

Estimate your monthly car payment, projected payoff timeline, and total interest for an auto loan. Include your down payment, trade-in value, and sales tax to better understand the total cost of financing a vehicle. Optionally model extra principal payments to see how they shorten the loan and reduce total interest paid.

Vehicle price ($)

Enter between $1,000 and $500,000.

Down payment ($)

Enter $0 to $500,000.

Trade-in value ($)

Enter $0 to $200,000.

Sales tax (%)

Enter 0% to 20%.

U.S. average ~5–10%. Leave blank or 0 if tax is not financed.

Amount financed (calculated)

Enter vehicle price, down payment, trade-in, and tax above.

APR (%)

Enter APR between 0% and 40%.

Term (years)

Enter a whole number between 1 and 8.

Calculation method

Extra principal per period ($, optional)

Enter $0 to $5,000.

Base payment per period

Total payment (incl. extra)

Total interest paid

Periods to payoff

Estimated payoff schedule

Period	Payment	Principal	Interest	Balance

Schedule assumes on-time payments, constant APR, no late fees, and no additional lender charges. Real statements may differ.

Results are estimates based on your inputs. Actual terms depend on credit profile, lender policies, and state regulations. Sales tax treatment varies by state — some states tax only the financed portion after trade-in; confirm with your dealer. This tool is for educational purposes only and is not financial, legal, or tax advice.