Simple Credit Card Payoff Calculator for Excel

How to Use This Calculator

To use this calculator, follow these simple steps:

1. Enter your current credit card balance in the "Current Balance" field.
2. Enter your monthly payment amount in the "Monthly Payment" field.
3. Enter your annual interest rate in the "Annual Interest Rate" field.
4. Click the "Calculate" button to see your payoff timeline.

The calculator will display the number of months required to pay off your balance, along with a chart showing your balance over time.

Formula Explained

The credit card payoff calculator uses the following formula to determine the number of months required to pay off your balance:

This formula accounts for the interest you'll pay each month while making your payments. It provides an accurate estimate of how long it will take to pay off your credit card balance.

Worked Example

Let's look at an example to understand how the calculator works. Suppose you have a credit card balance of $5,000, you're paying $200 per month, and your annual interest rate is 18%.

1. Calculate the monthly interest rate: 18% ÷ 12 = 1.5% or 0.015
2. Plug the values into the formula:

   Example Calculation

   Number of Months = -log(1 - (5000 × 0.015) / 200) / log(1 + 0.015)

   = -log(1 - 75 / 200) / log(1.015)

   = -log(0.625) / log(1.015)

   ≈ -(-0.446) / 0.0068

   ≈ 0.446 / 0.0068 ≈ 65.59 months

3. The calculator would show that it will take approximately 66 months (5.5 years) to pay off the $5,000 balance with $200 monthly payments at 18% APR.

This example demonstrates how the calculator helps you understand the time required to pay off your credit card balance based on your payment plan.

Excel Formula

If you prefer to use Excel directly, here's the formula you can use in a cell:

Replace "Balance", "AnnualInterestRate", and "MonthlyPayment" with your actual values. This formula will give you the same result as the calculator.