We regularly check if businesses are entitled to their Australian business number (ABN) and review inactive ABNs for cancellation.

Providing accurate details in your ABN application will help to avoid delays.

It’s your client’s responsibility to maintain their Australian business number (ABN) details. Details must be updated within 28 days of becoming aware of any changes.

Non-residents may be entitled to an Australian business number (ABN) if carrying on an enterprise in Australia, or making supplies connected with Australia's indirect tax zone.

If you were prompted to visit this page during your ABN application process, contact us on 13 92 26 to complete your application.

You can now update your ABN with 4 additional business activities, plus the Australian and New Zealand Standard Industrial Classification (ANZSIC) code that

You can save and return to your Australian business number (ABN) application as many times as required before the expiry date.

You can update your details online or by contacting the ABR. If your business structure changes you may need to cancel your ABN.

Changes to the Australian Business Register (ABR) will allow up to 4 extra business activities to be recorded against your Australian business number (ABN).

Government agencies can apply for an ABN. Once an agency has an ABN it is important the details are kept up-to-date.

You can update your client's details online via Tax Agent services or by contacting the ABR. If their business structure changes their ABN may need to be cancelled.

There may be times that ABR services are impacted due to scheduled site maintenance.

This is a summary of the Australian Business Register (ABR) review, including recommendations, actions that we're taking and the way forward.

This fact sheet provides information on entrusted persons and their obligations.

Personal information collected by the Australia Business Register is treated as confidential and is protected by the Privacy Act 1988. In some circumstances, we are able to collect, use and divulge your information.

Find out how to check your ABR details.

As part of the Australian business number (ABN) application, you can apply for other business registrations.

Access ATO community and contact details for business, government and super enquiries. Order paper forms and check current ATO communication with ABN holders.

Where a legal personal representative (LPR) derives income from the property or business of the deceased person after the date of date up to the end of the administration of the estate, they may need to report this income through a trust. 

When you deal with the ABR, you may be asked for information to prove your identity.