Ownership structure of CommSec and Commonwealth Bank

Understanding the relationship between CBA and CommSec

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

Commonwealth Bank of Australia (CBA) is the owner of CommSec, which operates as the bank's dedicated share trading and investment arm. Because CommSec is a wholly-owned subsidiary, the two entities share integrated systems that allow users to manage their banking and investment portfolios through a unified digital interface.

For the average user, this relationship means you can link your Commonwealth Bank transaction account directly to your CommSec trading account. This integration enables the movement of funds for share purchases and the receipt of dividends without the need for manual transfers between different financial institutions.

Category Details
Access Methods CommSec website, CommSec mobile app, and NetBank integration.
Processing Time Fund transfers between linked CBA and CommSec accounts are typically updated in real-time.
Eligibility Available to existing Commonwealth Bank customers and new applicants meeting criteria.
Key Requirements Valid Australian residential address, tax file number, and a linked settlement account.

Linking your accounts

If you are a Commonwealth Bank customer, you can set up a CommSec account to trade shares. Follow these steps to ensure your accounts are connected properly:

  • Verify your eligibility: Check your personal details in NetBank to ensure they are current, as these will be used for your trading profile.
  • Apply online: Use the CommSec or NetBank portal to start the application. Since you are an existing customer, the system often pre-fills information, which saves time.
  • Link your settlement account: During the setup, select your existing Commonwealth Bank transaction account to act as your "Cash Settlement Account." This is the account where your trade proceeds and purchases are debited or credited.
  • Confirm access: Once approved, log in to NetBank and check the "CommSec" tab. If connected, your trading balance should be visible alongside your standard savings and transaction accounts.

Troubleshooting common issues

MFA or login issues
If you cannot see your CommSec account in NetBank, it often stems from a synchronization error or outdated credentials. Try logging out of NetBank entirely and signing back in. If the tab still does not appear, contact the CommSec support team to ensure your accounts are correctly linked under a single Customer ID.

Browser or app errors
Performance issues within the CommSec app can sometimes be resolved by ensuring your operating system and app version are up to date. If you encounter a page-loading error, clear your browser's cache or try a different browser. If the issue persists, the bank's technical support team can check for service outages.

Locked account or access issues
Your trading account might be restricted if there is an issue with your identity verification or a compliance update is required. If you see a notification that your access is limited, you will generally need to call the help desk to provide updated documentation. Do not attempt to open a second account, as this may delay the resolution process.

Pro-Tip: Before making your first trade, ensure your "Cash Settlement Account" has sufficient funds to cover the purchase price and brokerage fees. Keeping a buffer in this account avoids the need for mid-trade transfers, which can cause delays during market hours.

Frequently Asked Questions

Can I use a non-CBA bank account to settle my trades?

Yes, you can link an account from another Australian bank to your CommSec profile for trade settlement. However, the system logic differs slightly; funds transferred from external banks may take 1–2 business days to clear, whereas transfers from a linked Commonwealth Bank account are processed immediately. If you require speed for your trading, using a Commonwealth Bank account is the common preference. You can update your settlement details through your account settings at any time.

Do I need a separate login for CommSec and NetBank?

In most cases, you can access your CommSec account using your existing NetBank login details. This single sign-on approach is designed to simplify your experience. If you registered for CommSec independently before becoming a Commonwealth Bank customer, your accounts might be separate; in this scenario, you should contact support to have them merged. Your next step is to log into NetBank to see if the CommSec portal is already active in your dashboard.

Official Bank Information

Commonwealth Bank (CBA)

Support: 13 22 21

SWIFT Code: CTBAAU2S

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