Monthly Average Balance (MAB) is the average amount a bank requires you to keep in your savings account each month. Banks calculate it using daily closing balances, and charges may apply if the average falls below the prescribed requirement.
Quick overview:
- MAB refers to the average balance you must maintain in your account to meet your bank’s requirements.
- Banks add the daily closing balances for the month and divide the total by the number of days in that month.
- Banks may levy penalties if your average balance falls below the prescribed threshold. The charges vary by bank and account type.
Opening a savings account is often one of the first steps towards managing your money. However, every account comes with its own terms and conditions, including balance requirements. One such condition is the Monthly Average Balance (MAB), which affects how you manage your savings account.
But what exactly does MAB mean, and how does it affect your banking experience? Let’s understand what it means, how it’s calculated, and the charges associated with it.
What Is Monthly Average Balance (MAB)?
Monthly Average Balance, or Minimum Average Balance (MAB), is the average amount you must maintain in your savings account each month to meet your bank’s balance requirements.
If the average balance falls below the prescribed threshold, the bank may levy a penalty under its account terms. Salary accounts, however, often operate as zero-balance accounts as long as salary credits continue regularly. If these credits stop, the bank may convert the account into a regular savings account, making MAB requirements applicable.
On the other hand, not all accounts require a minimum account balance. Some banks offer zero-balance savings and current accounts that don’t carry this requirement, although their features and services may differ from other savings account.
MAB depends on each day’s closing balance throughout the month, not just the last day’s balance. Banks add these daily closing balances and divide the total by the number of days in the month to determine whether you have maintained the required average.
How Is Monthly Average Balance Calculated?
Banks calculate the MAB by considering two factors:
- Sum of daily closing balances: The closing balance in your account at the end of each day during the month.
- Number of days in the month: The total number of calendar days for which the bank calculates the average.
Banks add the daily closing balances and divide the total by the number of days in that month. Here’s the formula –
Monthly Average Balance = Sum of daily closing balances ÷ Number of days in the month
Let’s look at an example.
Suppose your bank requires you to maintain a MAB of ₹5,000 and your account records the following closing balances over a 30-day month.
| Days | Daily Closing Balance (₹) | Total for the Period (₹) |
| 1–7 | 8,000 | 56,000 |
| 8–14 | 6,000 | 42,000 |
| 15–21 | 4,000 | 28,000 |
| 22–30 | 5,000 | 45,000 |
| Total | — | 1,71,000 |
Using the formula:
MAB = ₹1,71,000 ÷ 30 = ₹5,700
Here, your average balance comes to ₹5,700, which exceeds the bank’s required MAB of ₹5,000. Therefore, the account meets the monthly average balance requirement.
Note: The closing balance shown for each date range is assumed to remain the same on every day within that period.
What Charges Are Levied When MAB Is Not Maintained?
Banks may levy a penalty when your MAB falls below the minimum required for your account variant. However, the charge amount and calculation method vary by bank and account type. Some banks calculate the penalty as a percentage of the shortfall, subject to a specified cap.
GST also applies to the applicable service charge at the prevailing rate.
How Do Banks Recover MAB Charges?
Banks follow a defined process before recovering a penalty for failing to maintain MAB.
- Monthly assessment: The bank calculates your average closing balance for the calendar month and compares it with the required MAB.
- Customer notification: If your balance falls short, the bank informs you through SMS, email, or a written notice.
- Time to restore the balance: RBI guidelines for savings account require banks to give customers at least one month from the date of notice to restore the required balance.
- Charge recovery: If you fail to restore the balance within the specified period, the bank can recover the applicable penalty after informing you.
The exact charge and debit date depend on the bank’s published terms and processing cycle. You should always check your bank’s current schedule of charges to understand the applicable penalty, any cap, and the GST amount.
However, certain accounts also receive specific exemptions. For instance, a Basic Savings Bank Deposit Account (BSBDA) does not require a minimum balance. RBI guidelines also prohibit penal charges for non-maintenance of the minimum balance in an inoperative account.
Why Do Banks Charge for Not Maintaining MAB?
Banks require customers to maintain a minimum average balance to encourage them to keep a certain amount of money in their accounts. These deposits fund lending and other banking activities. A stable deposit base also helps banks manage liquidity and day-to-day operations.
When an account’s average balance falls below the prescribed threshold, banks may levy a charge under the account’s terms and conditions. This charge also encourages customers to maintain the required balance and reflects the conditions associated with their chosen account variant.
One important point is that RBI does not set a uniform MAB requirement or penalty applicable to all banks. Banks determine their own minimum balance thresholds and non-maintenance charges, subject to applicable regulatory guidelines. As a result, required balances and penalties differ across banks and account types.
Conclusion
Managing your MAB is not just about avoiding bank charges. It is also about using your money wisely.
If maintaining the required balance feels restrictive, consider whether your current savings account meets your needs. Switching to a zero-balance account, keeping an eligible salary account, or using a sweep-in facility could give you more flexibility in managing your money.
Ultimately, the goal is to meet your everyday banking needs without keeping more money idle than necessary.
