Auto Loan Calculator with Payoff and Trade

This auto loan calculator helps you determine monthly payments, loan payoff schedules, and trade-in value when refinancing or purchasing a new vehicle. It accounts for loan terms, interest rates, down payments, and trade-in values to provide a comprehensive financial overview.

How to Use This Calculator

To use this auto loan calculator, follow these steps:

Enter the loan amount (the total amount you're borrowing).
Input the interest rate (annual percentage rate).
Specify the loan term in years.
Add any down payment if applicable.
Enter the trade-in value if you're trading in a vehicle.
Click Calculate to see your monthly payment, total interest, and payoff schedule.

The calculator will display your monthly payment, total interest paid over the life of the loan, and a chart showing the loan payoff schedule. It also accounts for the trade-in value, which reduces the total amount you need to finance.

Formulas Used

The calculator uses standard auto loan formulas to determine monthly payments and loan payoff schedules.

Monthly Payment Formula:

M = P [ i(1 + i)ⁿ ] / [ (1 + i)ⁿ - 1 ]

Where:

M = Monthly payment
P = Principal loan amount (Loan Amount - Down Payment - Trade-in Value)
i = Monthly interest rate (Annual Rate / 12 / 100)
n = Number of payments (Loan Term in Years × 12)

Total Interest Paid:

Total Interest = (Monthly Payment × Number of Payments) - Principal

The calculator also generates a loan amortization schedule showing the principal and interest breakdown for each payment.

Worked Example

Let's calculate a monthly payment for a $25,000 loan with a 4.5% annual interest rate over 5 years, including a $3,000 down payment and a $2,000 trade-in value.

Example Inputs:

Loan Amount: $25,000
Interest Rate: 4.5%
Loan Term: 5 years
Down Payment: $3,000
Trade-in Value: $2,000

First, calculate the principal loan amount:

Principal = Loan Amount - Down Payment - Trade-in Value

Principal = $25,000 - $3,000 - $2,000 = $20,000

Next, calculate the monthly payment using the formula:

Monthly Interest Rate = 4.5% / 12 / 100 = 0.00375

Number of Payments = 5 × 12 = 60

Monthly Payment = $20,000 [ 0.00375(1 + 0.00375)⁶⁰ ] / [ (1 + 0.00375)⁶⁰ - 1 ]

Monthly Payment ≈ $332.47

The total interest paid over the life of the loan would be:

Total Interest = ($332.47 × 60) - $20,000 ≈ $1,948.20

This example shows that with a $20,000 principal, a 4.5% interest rate, and a 5-year term, the monthly payment would be approximately $332.47, with a total interest of about $1,948.20.

Frequently Asked Questions

How does the trade-in value affect my loan amount?

The trade-in value reduces the total amount you need to finance. For example, if you're financing $25,000 with a $2,000 trade-in, your principal loan amount becomes $23,000 (assuming no down payment).

Can I use this calculator for both new and used cars?

Yes, this calculator works for both new and used car loans. Simply enter the appropriate loan amount, interest rate, and term for your specific situation.

How accurate is the payoff schedule?

The payoff schedule is based on standard auto loan amortization and provides an estimate of your loan payoff. For precise payoff dates, consult your lender.

Does this calculator account for taxes and fees?

This calculator provides an estimate of your monthly payment and payoff schedule. It does not include taxes, fees, or other optional charges. Check with your lender for a complete financial picture.