Bank Auto Loan Calculator

How to Use This Calculator

To calculate your auto loan payments, follow these steps:

1. Enter the loan amount you're considering (e.g., $25,000)
2. Select the loan term in years (e.g., 5 years)
3. Enter the annual interest rate (e.g., 4.5%)
4. Click "Calculate" to see your estimated monthly payment and total interest

The calculator will display your monthly payment, total interest paid over the life of the loan, and the total amount paid (principal + interest). You can also see a breakdown of how much of each payment goes toward interest versus principal.

Formula Explained

The auto loan calculator uses the standard mortgage payment formula:

This formula calculates the fixed monthly payment required to pay off the loan over the specified term, including both principal and interest.

Key assumptions:

• Fixed interest rate throughout the loan term
• No prepayment penalties
• No additional fees or taxes
• Monthly compounding of interest

Worked Example

Let's calculate a $25,000 auto loan with a 5-year term and 4.5% annual interest rate.

1. Convert annual rate to monthly: 4.5% ÷ 12 = 0.375% or 0.00375
2. Calculate number of payments: 5 years × 12 = 60 payments
3. Plug values into the formula:
   M = 25000 [ 0.00375(1 + 0.00375)^60 ] / [ (1 + 0.00375)^60 - 1 ]
4. Calculate the monthly payment: $452.34
5. Total interest paid: $1,777.20
6. Total amount paid: $26,777.20

This example shows that over 5 years, you would pay $452.34 per month, with $1,777.20 going to interest and $25,000 going to the principal.