MAB i.e. minimum average balance, whatever is the balance of every day in your account in that month, is an average of it. For example, if your account is 50,000 rupees daily in 30 days, then your MAB will be Rs 50,000. If someday it is 15 lakh rupees and the rest of the day, then the MAB will still be 50,000 rupees. Earlier many banks used to see MAB on a quarterly basis, but now it is on a monthly basis, which has made it necessary to maintain balance every month.
