Do I need an ABN (Australian Business Number)?

Australian Capital Territory
New South Wales
Northern Territory
South Australia
Western Australia

What is an ABN?

An ABN is a unique 11 digit number that identifies your business to the government and community.

It doesn't replace your TFN tax file number, or your ACN Australian Company Number (if your legal entity is a Company).

You can use an ABN to:

✅ Identify your business to others when ordering and invoicing;

✅ Avoid pay as you go (PAYG) tax on payments you get;

✅ Claim goods and services tax (GST) credits;

✅ Claim energy grants credits; and/or

✅ Get an Australian domain name.

Not all Businesses need an ABN

To obtain an ABN you need to be running a business or other enterprise.

Visit the Australian Business Register (ABR) website to find out about your entitlement to an ABN.

When must my business register for an ABN?

It is compulsory for businesses with a GST turnover of $75,000 or more to have an ABN and to be registered for GST.

How to Register for an ABN

Before you register, please ensure you have the following:

⚖️ Decided Your Business Structure or Legal Entity, and have the details on hand;

⚖️ Proof of Identity;

⚖️ Be able to provide details of your business activities or proposed business activities + associates.

👉 Register for an ABN

Check your / Supplier's ABN Registration Details

You can use the ABN Lookup website to look up information about a registered ABN.

For example, to check:

✅ That your ABN details are up-to-date; and

✅ The details of a supplier.

ABN Lookup allows you to search publicly available information supplied by businesses when they register for an ABN.

👉 Search ABN Lookup


This FAQ was created by James D. Ford GAICD | Principal Solicitor, Blue Ocean Law Group℠.

Important Notice:

This FAQ is intended for general interest + information only.

It is not legal advice, nor should it be relied upon or used as such.

We recommend you always consult a lawyer for legal advice specifically tailored to your needs & circumstances.