An Australian business number (ABN) is free when you register with the Australian Business Register (ABR).
The ABN is a unique 11 digit number that identifies your business or organisation to the government and community.
Once registered your ABN details are stored in the ABR.
Not everyone needs an ABN and not everyone is entitled to one. If you are running a business you will need an ABN.
When you register for an ABN you can:
Government uses ABN information to build a better understanding of business demographics in your local area.
This helps to guide service delivery, plan and manage infrastructure and provide disaster recovery for you and your community.
Find out if you are entitled to an ABN