Average Daily Balance (including or excluding new purchases). The average daily balance method gives you credit for your payment from the day the card issuer receives it. To compute the balance due, the card issuer totals the beginning balance for each day in the billing period and deducts any payments credited to your account that day. New purchases may or may not be added to the balance, depending on the plan, but cash advances typically are added. The resulting daily balances are added up for the billing cycle and the total is then divided by the number of days in the billing period to arrive at the "average daily balance." This is the most common method used by credit card issuers.
Adjusted Balance. This balance is computed by subtracting the payments you made and any credits you received during the present billing period from the balance you owed at the end of the previous billing period. New purchases that you made during the billing period are not included. Under the adjusted balance method, you have until the end of the billing cycle to pay part of your balance and you avoid the interest charges on that portion. Some creditors exclude prior, unpaid finance charges from the previous balance. The adjusted balance method usually is the most advantageous to card users.
Previous Balance. As the name suggests, this balance is simply the amount you owed at the end of the previous billing period. Payments, credits, or new purchases made during the current billing period are not taken into account. Some creditors also exclude unpaid finance charges in computing this balance.
