Auto Loan Calculator

Estimate monthly payment, total interest, and total cost. Supports down payment, trade-in, taxes, fees, and extra payments.

How to Use

  1. Enter the vehicle price and your loan APR + term.
  2. Add down payment, trade-in, taxes, and fees if applicable.
  3. Optional: set an extra monthly payment to see payoff impact.
  4. Results update instantly (share link only updates when you press Share).
Loan Summary
Live totals and payment estimate.
Monthly
—
Financed
—
Interest
—
Total Cost
—
Estimate: —
Vehicle Price
—
Down + Trade
—
Taxes + Fees
—
APR / Term
—
Inputs
All calculations are estimates. Results update as you type.
Sticker price or agreed purchase price (before credits).
Annual percentage rate (not a simple interest quote).
Common: 36, 48, 60, 72, 84.
Cash down (reduces amount financed).
Estimated trade-in credit applied to price.
If you owe money on the trade, it increases financed amount.
If your state taxes after trade-in credit, enable the toggle below.
One-time fees added to the deal.
Adds to principal each month (estimate of payoff impact).
Used for an estimated payoff date when extra payments are set.
Show Work (step-by-step)
—
Work uses the standard amortized loan payment formula with a monthly rate derived from APR.

Reference

Standard monthly payment for an amortized loan: PMT = P × r × (1+r)^n ÷ ((1+r)^n − 1)

  • P = amount financed (principal)
  • r = monthly interest rate (APR ÷ 12 ÷ 100)
  • n = term in months
This tool does not include insurance, lender-specific rules, or local incentives.

FAQ

Does a bigger down payment reduce interest?

Yes. A larger down payment reduces the amount financed, which usually lowers both monthly payment and total interest.

What does “trade-in payoff” do?

If you still owe money on your trade-in, that payoff can be rolled into the new loan and increases the amount financed.

How accurate is “extra payment payoff date”?

It’s an estimate. Actual payoff depends on lender payment allocation rules, timing, and rounding.

Tool Info

Last updated:

Updates may include improved edge-case handling, payoff estimation, and accessibility refinements.