What is a Commonwealth Direct Investment Account (CDIA)?

The Commonwealth Direct Investment Account (CDIA) is the preferred cash management account for CommSec share traders. It allows you to trade and invest when and where it suits you.

CDIA features include:

  • Seamless settlement of trades, so you can take advantage of investment opportunities as they arise, without having to transfer funds between accounts
  • Low brokerage from just $5.00 per trade when you settle to your CDIA*
  • Transact in real-time on your cash account via NetBank, CBA’s leading online banking platform
  • A full range of transaction functions and at-call access to your cash

*To be eligible for CDIA brokerage, you must trade online, be CHESS Participant Sponsored with CommSec, and settle your trades through a CDIA.

How do I open a Commonwealth Direct Investment Account (CDIA)?

Here's how to open a CDIA:

  • Log into your CommSec account
  • Go to Portfolio
  • Select Offers and Apply
  • Select Applications in the left hand menu
  • Click Apply Now next to "Add a new Commonwealth Direct Investment Account (CDIA) for saving and/or trading".

Can I have more than one CDIA?

While you can create multiple Commonwealth Direct Investment Accounts (CDIA) under your CommSec profile, CDIA accounts that are outside of the Target Market Determination (TMD) may be closed in accordance with the Transaction, Savings and Investment Accounts (TSIA) Terms and Conditions.

How do I provide my Tax File Number (TFN) for my CDIA?

Without a valid TFN or a TFN exemption applied to your Commonwealth Direct Investment Account (CDIA), you may be subject to withholding tax from any interest earned on your account/s.

To provide your TFN for your CDIA, you’ll need to log on to Netbank. You can access NetBank from your CommSec account by selecting the NetBank tab in the top left corner of your screen. Once you’re logged on to Netbank, go to Settings, then select “Tax file number” under Profile.

For entity account types including SMSF, Company and Trust, please contact the Commonwealth Bank on 13 1998 or visit your local branch to update your TFN details.

If you wish to provide your TFN for share trading purposes, you'll need to provide it directly to the relevant share registry.

Learn more about adding your TFN for a CDIA.

Is there a minimum balance required in my Commonwealth Direct Investment Account (CDIA)?

No, there’s no minimum balance requirement for a CDIA opened through CommSec.

Are there any fees and charges associated with a CDIA?

If your Commonwealth Direct Investment Account (CDIA) is linked to a CommSec Share Trading Account and it was opened on or after 1 November 2012, the account does not incur a monthly account keeping fee. Accounts opened before 1 November 2012 will incur a $5 monthly account keeping fee.

You also won’t be charged anything for online transfers, direct debits, or withdrawals from Commonwealth Bank ATMs in Australia.

View the full list of CDIA fees and charges.

What are the interest rates associated with a CDIA?

Interest earned on CDIA accounts is calculated daily and credited to your account on the first calendar day of each month.*

To view the current interest rate schedule for CDIAs, go to Products > Cash > Rates & Fees or click here.

For CDIAs opened before 1 November 2012, please refer to the CBA interest rate flyer.

You can also check the current interest rate applicable to your CDIA on NetBank, or by calling the Commonwealth Bank on 13 22 21.

*For Commonwealth Direct Investment Accounts opened before 1 November 2012, interest is credited quarterly.


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The information on this page has been prepared without taking into account your objectives, financial situation or needs. For this reason, any individual should, before acting on this information, consider the appropriateness of the information, having regards to their objectives, financial situation or needs, and, if necessary, seek appropriate professional advice.

CommSec does not give any representation or warranty as to the accuracy, reliability or completeness of any content on this page, including any third party sourced data, nor does it accept liability for any errors or omissions.