Australian Business Number

The Australian Business Number (ABN) is a unique number used to identify business names and companies. The Australian Business Register (ABR) provides ABNs.

Find details on ABN lookup

Who can get an ABN?

Companies that trade in Australia can apply for an ABN. You can also apply for an ABN as an individual or a partnership.

What happens to your company's ACN?

Your ACN is still active and can be used. Your ABN will be based on your company's ACN.

Can I use my ABN instead of an ACN?

You can use your ABN instead of your ACN on company documents and material. You must make sure that:

  • your ABN includes your nine digit ACN, and
  • the ABN is used in the same places that the ACN is used.

For more information about Australian Business Numbers, contact the Australian Business Register.

How do I apply for an ABN?

You can apply for an ABN online through the Australian Business Register.

Search our registers

Use our online services

Find a form

Contact us

Last updated: 30/03/2021 09:31