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ABN guides
- How to find an ABNWays to find the ABN of any Australian business — by name, from an invoice or from its ACN.
- ABN lookup by business nameHow to search an ABN using a business name, company name or trading name.
- How to check if an ABN is activeWhat active and cancelled ABN status mean, and what to do with a cancelled ABN.
- How to check GST registrationFind out if a business is registered for GST before paying an invoice that includes GST.
- ABN vs ACN: what is the difference?The difference between an Australian Business Number and an Australian Company Number.
- How the ABN check digit worksThe official formula used to validate an 11-digit ABN, step by step.
- How to apply for an ABNWho is entitled to an ABN and how to apply for one for free.
- How to cancel an ABNWhen to cancel your ABN and how to do it.
- How to find out who owns a business in AustraliaWhat the ABN record tells you about a business owner, and where to look for more.
- ABN entity types explainedWhat each ABN entity type means: sole trader, private company, trusts, partnerships and super funds.