What’s an ABN?

What's an ABN?

An ABN is a unique 11-digit number assigned to Australian businesses for tax and other business purposes. The Australian Business Register (ABR) provides ABNs.

Who needs an ABN? 

If you’re a business in Australia, regardless of size or structure, you’ll likely need an ABN. This includes sole traders, partnerships, companies and trusts.

Why would you need an ABN?

An ABN is needed for businesses and entities in Australia for several reasons:

• Tax purposes: An ABN is needed for businesses to make business transactions and be eligible for the Goods and Services Tax (GST). Without an ABN, other businesses may have to withhold tax at the highest marginal rate from payments made to you (known as Withholding tax).
• To open a business bank account: An ABN is often needed when opening a business bank account in Australia. It helps financial institutions meet their regulatory obligations to verify businesses opening accounts. It also helps track business transactions and ensure compliance with tax regulations.
• Business transactions: Many suppliers and other businesses may need your ABN when entering transactions to comply with tax regulations.
• Credibility: Having an ABN can increase the credibility of a business, as it proves it’s registered and recognised by the Australian Government.
• Access to government services: An ABN is often needed to access certain government services, grants or concessions available to businesses.

How much does an ABN cost?

Registering for an ABN through the ABR is free. 

Tips for managing your ABN

• Can’t find your ABN? Check any letters the government has sent to your business or use the ABN Lookup online tool.
• Have your business details changed? It’s important to update your details in the ABN Registrar.