Section 7-4: Average-Daily-Balance Method (New Purchases Included)

The average daily balance method, including new purchases, is another way creditors calculate finance charges on credit card balances. This method considers both the existing balance from the previous billing cycle and any new purchases made during the current billing cycle. Here's how the average daily balance method (new purchases included) works:

1. Calculation Period: Credit card issuers typically calculate finance charges on a monthly basis, known as the billing cycle. For this method, the calculation includes both the existing balance carried over from the previous billing cycle and any new purchases made during the current billing cycle.

2. Average Daily Balance: To determine the finance charge using the average daily balance method (new purchases included), the average daily balance of the credit card account is calculated for the billing cycle. The average daily balance is the sum of the outstanding balances on each day of the billing cycle divided by the number of days in the cycle.

3. Daily Interest Rate: The credit card's annual percentage rate (APR) is divided by the number of days in the year to determine the daily periodic rate. This daily interest rate is then applied to the average daily balance to calculate the daily finance charge.

4. Accumulated Finance Charges: The daily finance charges incurred during the billing cycle are accumulated to determine the total finance charge for the period. This total finance charge is added to the outstanding balance, which includes both the previous balance and any new purchases, to determine the new balance due.

5. Example: Let's say you have a credit card with an APR of 18% and a billing cycle of 30 days. If your average daily balance for the billing cycle is $1,000, and you made $500 in new purchases during the cycle, the daily periodic rate would be calculated as follows:

   Daily Periodic Rate = (Annual Percentage Rate / 365) * 30

   Daily Periodic Rate = (0.18 / 365) * 30 ≈ 0.01479%

   If we round it up, the daily periodic rate would be approximately 0.015%.

   The daily finance charge would then be:

   Daily Finance Charge = Average Daily Balance * Daily Periodic Rate

   Daily Finance Charge = $1,500 * 0.00015 ≈ $0.225

   If the billing cycle is 30 days, the total finance charge for the cycle would be approximately $0.225 * 30 = $6.75.

Please note that this is a simplified example, and actual finance charges may vary based on factors such as the timing of transactions, minimum payment requirements, and any promotional or introductory interest rates. Additionally, the method used to calculate finance charges may vary between credit card issuers.