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As a business owner, you are responsible for ensuring that you update your Australian Business Number (ABN) details. If there has been a change to your business, you are required to let the Australian Business Register (ABR) know of the change within 28 days of becoming aware of the change. You can use ABN Lookup to check whether your ABN details are up to date. This article will explain how to update your ABN details.

What You Need to Update

You may need to update your ABN details if any of the following things change:

  • legal name of the entity, except for:    
    • individuals and sole traders (you will need to notify the Australian Tax Office (ATO) directly who will let the ABR know of the change); and
    • companies registered with the Australian Securities and Investments Commission (ASIC) (you will need to notify ASIC directly who will let the ABR know of the change);
  • addresses – postal, principal place of business or email;
  • the main business activity and industry code for the business;
  • business structure;
  • contact details; or
  • associate details.

How You Update Your Details

There are a few different ways the ABR allows you to update your ABN details:


You can update your details online using an AusKey.  Changes made online will take immediate effect.

An AusKey provides you with a secure login for accessing certain government online services on behalf of the business. To be eligible for an AusKey, you must have an ABN.

To register for the first AusKey, you need to be an eligible associate recorded on the ABR for that ABN. You can register yourself or someone else for the first AusKey.  You can register for an AusKey at the ABR’s website.

Manage ABN Connections

Alternatively, you can use ‘Manage ABN Connections’ as a secure login alternative to AusKey. Manage ABN Connections allows you to connect your ABN number to your personal myGov account. You will need to be authorised to act on behalf of the ABN. You can then access certain government online services on behalf of the business.

Contact the ABR Directly

You can also contact the ABR directly by phone to advise them of any changes or lodge a form by mail.

Key Takeaways

As a business owner, it is important to ensure your ABN details are up to date. You can do this by notifying the ABR of any changes online with your AusKey or Manage ABN Connections or by phoning or mailing the ABR.

If you require assistance with your ABN, contact LegalVision’s business lawyers today on 1300 544 755 or fill out the form on this page.


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