The process of ABN registration in Australia is usually quick and straightforward. In most cases, if all the information you provide is correct and matches government records, your ABN is issued immediately after completing the online application.
However, sometimes the Australian Business Register (ABR) needs to review your application in more detail. If that happens, it can take up to 28 days to process. You’ll be notified by mail or email once a decision has been made.
To avoid delays, make sure:
- Your personal and business details are accurate
- You meet the eligibility criteria to register for an ABN
- Your business activity is clearly described
Whether you’re a sole trader, freelancer, or starting a company, ABN registration in Australia is a key step to legally operating your business — and in most cases, you can get started the same day you apply.

