QAB stands for "Quarterly Average Balance" and is a requirement for certain savings accounts. It refers to the average balance maintained by an account holder over a quarter, which is three months. If the minimum balance required for a quarter is not maintained, the bank may charge a maintenance fee, which is known as QAB charges. The QAB charges depend on the type of savings account held with the bank and the location or branch of the bank. The QAB is subject to change, and account holders can check it with their local bank branch or the banks official website.

For example, Punjab National Bank (PNB) has revised the charges for non-maintenance of QAB in current and PNB Smart Banking accounts. The non-maintenance QAB charges will be charged to current general and PNB Smart Banking accounts, per the new tariff. The charges vary based on the type of account and the minimum quarterly average balance required.

In summary, QAB charges are fees charged by banks for not maintaining the minimum quarterly average balance required for certain savings accounts. The charges vary based on the type of account and the minimum quarterly average balance required.