Auto Deal Calculator

How to Use This Calculator

To use the auto deal calculator, follow these simple steps:

1. Enter the vehicle price (the total cost of the car before taxes and fees).
2. Enter your down payment (the amount you'll pay upfront).
3. Enter the loan term in years (how long you'll take to repay the loan).
4. Enter the interest rate (the annual percentage rate charged by the lender).
5. Click the Calculate button to see your estimated monthly payment and total cost.

The calculator will display your estimated monthly payment and the total amount you'll pay over the life of the loan. You can also see a breakdown of how much you'll pay in interest versus principal.

Formula Used

The auto deal calculator uses the standard auto loan payment formula:

This formula calculates the fixed monthly payment for an auto loan based on the loan amount, interest rate, and loan term.

Worked Example

Let's walk through an example to see how the auto deal calculator works.

Example Scenario

• Vehicle price: $25,000
• Down payment: $5,000
• Loan term: 5 years
• Interest rate: 4.5%

Using the formula:

1. Calculate the loan amount: $25,000 - $5,000 = $20,000
2. Convert the annual interest rate to a monthly rate: 4.5% ÷ 12 = 0.375% or 0.00375
3. Calculate the number of payments: 5 years × 12 = 60 payments
4. Plug the values into the formula:

   Monthly Payment = $20,000 × (0.00375(1 + 0.00375)^60) / ((1 + 0.00375)^60 - 1)

   Monthly Payment ≈ $362.47

In this example, the estimated monthly payment would be approximately $362.47, and the total amount paid over 5 years would be approximately $21,748.20.