Published Feb 4, 2026 4 Min Read

What is Minimum Balance in Account? AMB & AQB Explained

Defining Minimum Balance

A minimum balance is the lowest amount of money an account holder must maintain in their bank account to avoid penalties. This requirement varies across banks and account types, ensuring that customers actively use their accounts.

Banks often calculate the minimum balance based on AMB or AQB. While AMB refers to the average balance maintained in an account over a month, AQB is calculated quarterly. These balances ensure that banks can sustain operational costs while offering account-related benefits.

Understanding AMB and AQB with Examples

Let us break down these calculations:

  • AMB Example:
    If your bank requires an AMB of Rs. 5,000 and you deposit Rs. 15,000 at the start of the month but withdraw Rs. 10,000 mid-month, your AMB would be calculated as:

    (Rs. 15,000 for 15 days + Rs. 5,000 for 15 days) ÷ 30 days = Rs. 10,000 AMB

    Since Rs. 10,000 exceeds the required AMB, you avoid penalties.

  • AQB Example:
    For AQB, the calculation spans three months. If the required AQB is Rs. 10,000 and your monthly balances are Rs. 12,000, Rs. 8,000, and Rs. 10,000, the AQB would be:

    (Rs. 12,000 + Rs. 8,000 + Rs. 10,000) ÷ 3 = Rs. 10,000 AQB

    You meet the AQB requirement, avoiding penalties.

Why Minimum Balance Matters

Maintaining AMB or AQB is crucial for account holders. Failure to meet these requirements may result in penalties, reduced account benefits, or even account suspension. By adhering to minimum balance policies, you ensure uninterrupted access to banking services and avoid unnecessary fees.

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Grievance redressal 

Understanding Minimum Balance Charges: How Banks Levy Penalties

How Penalties Are Calculated

Banks impose minimum balance charges if the required balance is not maintained. These charges are typically calculated based on the shortfall in the balance and the number of days the account remains below the threshold.

For instance, if your account requires an AMB of Rs. 5,000 but you maintain Rs. 3,000, the shortfall is Rs. 2,000. Banks may levy charges proportionate to this shortfall, along with applicable taxes such as GST.

Avoiding Minimum Balance Charges

To avoid penalties:

  1. Monitor Your Account Regularly: Use your bank’s mobile app or online portal to track balances.
  2. Set Alerts: Enable notifications to stay informed about low balances.
  3. Plan Withdrawals: Avoid large withdrawals that may put your AMB or AQB at risk.
  4. Deposit Strategically: Ensure timely deposits to meet balance requirements.

Why It Matters

Minimum balance charges can add up, impacting your financial health. By understanding how banks calculate these fees and proactively managing your account, you can save money and maintain a healthy banking relationship.

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How to complain 

Zero Balance Accounts: Is a BSBDA Right for You?

Introducing Zero Balance Accounts

A Zero Balance Account, also known as a Basic Savings Bank Deposit Account (BSBDA), eliminates the need for maintaining a minimum balance. These accounts are ideal for individuals who prefer a hassle-free banking experience without worrying about penalties.

Comparing BSBDA with AMB/AQB Accounts

FeatureBSBDAAMB/AQB Accounts
Minimum Balance RequiredNoneRs. 5,000 or more (varies)
Penalties for ShortfallNoneApplicable
Account BenefitsLimited servicesComprehensive banking options

Who Should Opt for Zero Balance Accounts?

Zero balance accounts are ideal for:

  • Students and low-income individuals.
  • Those seeking basic banking services without additional fees.
  • Customers who do not require advanced features like overdraft facilities.

Frequently Asked Questions

Are minimum balance charges taxable under GST?

Yes, GST is applied to minimum balance charges as per applicable laws. For example, if your bank levies Rs. 100 as a penalty, an 18% GST would result in a total charge of Rs. 118.

Can a bank close my account if I don't pay the minimum balance charges?

Banks may freeze or close accounts if charges are unpaid for an extended period. However, this action is taken only after notifying the account holder and verifying the situation.

How long can I keep a minimum balance in account shortfall before being fined?

Most banks impose penalties immediately after detecting a shortfall. Policies vary, so it is best to review your bank’s terms to avoid fines.

Is the minimum balance in account requirement the same for NRE and NRO accounts?

No, the requirements differ. NRE accounts typically have higher minimum balance thresholds compared to NRO accounts due to their specific features and benefits.

Will a minimum balance in account penalty show up on my CIBIL report?

While minimum balance penalties do not directly impact your CIBIL score, unpaid charges over time may lead to account closure, indirectly affecting your credit history.

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