Managing a negative balance on your CommBank account

Steps to resolve a negative account balance

Olesya Krasavtseva
Fact-checked by Olesya Krasavtseva
Content Editor at Prostobank Consulting Prostobank Consulting Logo
Updated: 01.09.2026
Table of Contents

If your Commonwealth Bank account balance shows as negative, it means that recent transactions or fees have exceeded your available funds. This can occur if a scheduled payment, such as a direct debit or subscription, processes when there is insufficient money to cover the full amount.

Addressing a negative balance promptly is the most effective way to prevent interest charges or further account fees. The process for clearing the balance involves identifying the source of the deficit and ensuring that enough funds are deposited to bring the account back to a positive status.

Category Details
Methods CommBank app, NetBank transfer, or direct deposit.
Processing Time Balances typically update as soon as funds are cleared in the account.
Eligibility Applies to all personal transaction account holders.
Key Requirements Sufficient funds to cover the negative amount plus any applicable fees.

Steps to fix a negative balance

Follow this sequence to identify the cause and restore your account to a positive balance:

  • Check your transaction history: Log in to the CommBank app or NetBank to view recent activity. Look for any unexpected payments, subscription renewals, or banking fees that may have pushed the balance into the negative.
  • Transfer funds: If you have another account with money available, perform an internal transfer to move those funds into the overdrawn account.
  • Deposit cash or transfer from another bank: If you do not have internal funds, you can deposit cash at a branch or perform an external transfer from another financial institution to cover the shortfall.
  • Review upcoming payments: Examine your 'Scheduled payments' in NetBank to see if other transactions are due soon. This helps you avoid going back into the negative shortly after clearing the current balance.

Troubleshooting common issues

MFA or login issues
If you cannot log in to your account to check the balance, it might be due to a session timeout or MFA delay. Try closing the app entirely and restarting your device. If you remain locked out, contact the bank’s support line to verify your identity and regain access.

Browser or app errors
Sometimes the app may show a delayed balance, especially if you have made a deposit that is still processing. Clear your app cache or check if there is an update available. If the negative balance persists for more than 24 hours after a deposit, call the bank to confirm the status.

Locked account or access issues
Accounts are sometimes restricted if the negative balance remains unresolved for an extended period. If you see a notification that your account is locked, you will need to contact the bank directly. You may be required to verify your identity to discuss a plan to clear the debt.

Pro-Tip: Enable low-balance alerts in the CommBank app settings. By receiving a notification before your balance drops below zero, you can transfer funds in advance, which helps avoid unplanned overdraft fees or declined payments.

Frequently Asked Questions

Why was I charged a fee for a negative balance?

Fees are generally applied when an account goes overdrawn because it results in the bank temporarily covering a payment on your behalf. For example, if a direct debit for $100 processes but you only have $80, the bank may pay the full amount and charge an overdrawn fee for providing the extra $20. One limitation is that these fees are typically non-negotiable if the account remains overdrawn for a significant period. Your next step is to clear the balance immediately to prevent further daily interest from accruing.

What should I do if the negative balance was caused by a mistake?

If you suspect the negative balance is due to an error, such as a double-charged transaction or an incorrect merchant payment, gather your evidence, including dates and transaction IDs. While the bank’s system will automatically mark the account as negative based on the ledger, they can investigate potential disputes. Note that you still need to cover the balance to maintain account functionality while the investigation occurs. Your best next step is to call the bank's dispute department to log the transaction as a potential error.

Official Bank Information

Commonwealth Bank (CBA)

Support: 13 22 21

SWIFT Code: CTBAAU2S

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