The Average Daily Balance Method is a way to calculate interest charges on a credit card statement. With this method, you’re able to compare charges and credits on your statement to the balance at the end of the previous period. Credit card companies use this method to calculate your interest, so it’s important that you understand how it works.How Does the Average Daily Balance Method Work?The average daily balance method is simple. The credit card company takes the total balance at the end of the previous period and divides it by the number of days in that period. Then they divide your current balance by the same number of days and subtract your previous balance from this result.