Register for an Australian Business Number (ABN)

An Australian Business Number (ABN) is a unique 11 digit number that identifies your business to the government and community.

An ABN doesn't replace your tax file number, but it is used for various tax and other business purposes.  

Do I need an ABN?

Not everyone needs an ABN. To get one you need to be carrying on an enterprise.

If you apply for an ABN and you're not entitled, your application may be refused. You'll be sent a letter explaining why.

With an ABN you can:

  • confirm your business identity to others when ordering and invoicing
  • avoid Pay as You Go (PAYG) tax on payments you receive
  • claim Goods and Services Tax (GST) credits
  • claim energy grants credits
  • obtain an Australian domain name. 

For more information on entitlement to an ABN visit the Australian Business Register (ABR) website.

How do I apply for an ABN?

Applying for an ABN is free.

To apply for an ABN online, visit the Australian Business Register website.

Register an ABN

Do I need to register an ABN and a business name separately?

You can register for a business name at the same time as your ABN application. If you choose not to register for both at the same time you will need to go to the Australian Securities and Investment Commission (ASIC) to register your business name. You can do this after you get your ABN.

Business names are administered by the Australian Securities and Investment Commission (ASIC). As your registered business name may sometimes be referred to as an Australian business name or trading name, it's important to understand the difference between your Australian Business Number (ABN) and your registered business name.

Visit our register your business name page for more information.

I want to register a company. Do I apply for an Australian Company Number (ACN) or an ABN first?

You will need to register your ACN first, then your ABN.

For information on applying for an ACN and to download an application form, visit How to register a company on the Australian Securities and Investments Commission (ASIC) website.

How long does it take to get an ABN?

If you provide all the required information when applying online , you'll receive an online notification of your ABN immediately after completing your application.

If your identity cannot be confirmed, or more information is needed, the ABR will review your application within 20 business days. They may contact you if they need more information.

My business details have changed. Who do I need to inform?

You must inform the Australian Taxation Office about any changes to your ABN registration details. Please note that when you change your business structure you are also required to register a new ABN.

For information on how to update your ABN details, visit the Update your registration details page on the ATO website.

When you make changes to your business, you may also need to change your business name details. To do this, you must inform the Australian Securities and Investments Commission (ASIC). 

How do I cancel my ABN?

Visit the Cancel ABN page on the ATO website or contact the ATO on 13 28 66.

ABR Contact information

Contact the ABR to find out how your application for an ABN is progressing, to update your ABN or to cancel your registration.

More information...

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