Trading shares through Commonwealth Bank

Managing share trades via 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 facilitates share trading through CommSec, its dedicated brokerage platform. While the two systems are integrated to allow for convenient fund transfers, they operate as distinct environments to handle the separate regulatory requirements of retail banking and stock market trading.

Before you begin trading, you will typically need to establish a dedicated trading profile. This process helps the bank verify your identity and your trading experience, which is a requirement for accessing markets like the Australian Securities Exchange (ASX).

Key Trading Information

Category Details
Trading Methods CommSec web portal and CommSec app
Processing Time Real-time during market hours (T+2 settlement)
Eligibility Australian residents aged 18 and over
Key Requirements Verified ID and a linked transaction account

Steps to Start Trading

Accessing the market requires moving through a structured setup to ensure your trading account is properly funded and verified.

  1. Log in to NetBank and select the CommSec option to begin your application.
  2. Complete the application form, providing your Tax File Number (TFN) and details regarding your investment experience.
  3. Verify your identity according to standard anti-money laundering protocols.
  4. Once approved, transfer funds from your linked transaction account into your Commonwealth Direct Investment Account (CDIA) or relevant settlement account.
  5. Search for your desired stock, review the market depth, and submit your buy or sell order during ASX market hours.

Troubleshooting Common Issues

MFA / Login issues: Login difficulties are often caused by synchronization issues with your multi-factor authentication (MFA) token. Try logging out and clearing your browser cookies before attempting a new login. If access remains restricted, contact support to reset your digital credentials.

Browser or app errors: A page that fails to load often results from an outdated application version or browser incompatibility. Update your CommSec app or try using a different web browser to finalize your trade. If the error persists, check the CommSec system status page to rule out scheduled maintenance.

Locked account / ID access: Access is blocked if the system detects repeated failed sign-in attempts or potential security concerns. You must contact the customer service team to verify your identity, as this step is necessary to protect your portfolio from unauthorized access.

Pro-Tip: Use a 'Limit Order' when placing your trade instead of a 'Market Order'. This allows you to set the maximum price you are willing to pay, which helps you avoid buying at higher-than-expected prices during periods of market volatility.

Frequently Asked Questions

Why don't my shares appear in my main NetBank transaction balance?

Your share portfolio and your cash transaction account are separate financial products. While you can view a summary of your CommSec holdings within the banking dashboard, the value of your shares is not counted toward your 'Available Funds' for daily spending. If you need to access cash from a share sale, you must first sell the shares and wait for the trade to settle, then transfer the funds to your transaction account.

How long does it take for my trade to settle?

Share trades on the ASX follow a standard T+2 settlement cycle. This means that while your trade is executed immediately, the official transfer of ownership and cash payment takes two business days. Your contract note will display the specific date the trade is finalized. Plan your cash flow accordingly if you intend to withdraw the proceeds from a sale shortly after trading.

What is a CDIA and why do I need one?

A Commonwealth Direct Investment Account (CDIA) is a specific bank account designed to settle your share trades. It acts as the intermediary for your cash so that brokerage fees and trade costs are separated from your everyday spending money. If you try to trade without sufficient funds in your CDIA, your order will be rejected. Always move your intended investment amount into the CDIA before submitting an order.

Official Bank Information

Commonwealth Bank (CBA)

Support: 13 22 21

SWIFT Code: CTBAAU2S

Video Guides

Watch our expert video reviews to navigate Australian banking with ease.

Bank's Services and Products

Find and compare the best banking products tailored to your financial goals.

Personal Banking

Personal credit cards

Show details
Credit limit range: 400 dol to 1500 dol No physical card provided (digital only) Monthly minimum repayments: 40 dol or less Access to CommBank Yello Cashback Offers No additional cardholders allowed Does not earn Awards points

Personal debit cards

Show details
Applicant must be at least 18 years old Must have an Australian residential address Must hold an existing linked standard Debit Mastercard to upgrade Must be linked to an eligible CommBank transaction account Includes complimentary international travel insurance for trips up to 21 days (requires activation) Includes two complimentary airport lounge passes worldwide via Mastercard Travel Pass Features Price Guarantee, Purchase Security, and Extended Warranty insurances

Personal savings accounts

Show details
Must be 14 years or older to apply Requires a linked eligible CommBank transaction account Introductory bonus rate of 4,95% p.a. applies for the first 5 months

Personal transaction accounts

Show details
Must be 14 years or older Requires identity verification at a branch within 20 days if applying from overseas Includes physical and digital Debit Mastercard Eligible for CommBank Yello rewards with 5+ transactions monthly Access to digital tools like Bill Sense and Spend Tracker

Loans & Mortgages

Personal Car loans

Show details
No vehicle security or collateral is required Offers complete flexibility to make unlimited extra repayments without any fee Includes a redraw facility to access available funds if needed

Personal Home Loans

Show details
Discount margins vary based on Loan to Value Ratio (LVR) tiers up to 95% Freedom to split the loan and utilize multiple Everyday Offset accounts Interest Only payments available for up to 5 years (Owner Occupied) or 15 years (Investment) Minimum topup amount is 10000 AUD Variable rate is not protected from interest rate increases

Personal loans

Show details
No security or collateral required Includes a redraw facility to access extra funds paid into the loan Discounted rates available for eligible energyefficient purchases Repayments may fluctuate if the interest rate changes Repayment frequencies available: weekly, fortnightly, or monthly

Business Solutions

Business accounts

Show details
Must have an Australian Business Number (ABN) or Australian Company Number (ACN)Applicant must be at least 18 years oldRequires an existing eligible Commonwealth Bank AUD accountAccount must be used strictly for business purposesInterest is paid monthly on selected currencies based on balance tiersOnline application available for sole traders, Pty Ltd companies, SMSFs, and partnerships

Business car loans

Show details
Must have a current ABN and a minimum of 12 months trading history The financed vehicle or equipment serves as the loan security Optional balloon payments available to reduce ongoing monthly commitments Repayments can be customized to align with seasonal business cashflows Discount of up to 1,00% p.a. available for eligible green and efficient vehicles

Business credit cards

Show details
Up to 55 days interestfree period on purchases Minimum unsecured credit limit of 500 AUD, maximum up to 50000 AUD Includes Transit Accident Insurance and Unauthorised Transaction Insurance Access to personalized CommBank Yello Cashback Offers Features 24/7 emergency overseas assistance

Business loans

Show details
Must have a current ABN and a minimum of 12 months trading history The financed vehicle or equipment serves as the loan security Optional balloon payments available to reduce ongoing monthly commitments Repayments can be customized to align with seasonal business cashflows

Business savings

Show details
Allows early withdrawal of up to 20% of the balance without penalty fees or interest adjustmentsRequires a CommBank business transaction account in the same business nameMust have an Australian Business Number (ABN)

Find bank, branch or ATM

Locate the nearest financial services, interactive maps, and contact details across Australia.