A unique 9-digit number assigned by ASIC to every company registered in Australia under the Corporations Act 2001. The ACN identifies the legal company entity specifically — distinct from the ABN, which covers any business type. The ACN must appear on all company documents, letterheads, and invoices.
Understanding the fundamentals of Australian business setup is essential for any entrepreneur or sole trader. Whether you are just starting out or looking to optimise your existing setup, understanding ACN (Australian Company Number) is an important step.
Key points
- ABN required for all businesses operating in Australia
- ASIC registration mandatory for companies
- Choosing the right business structure impacts liability and tax
- A registered business address must be a real street address
Why it matters for your business
In today's evolving Australian business landscape, staying informed about concepts like ACN (Australian Company Number) gives you a competitive edge. From sole traders and freelancers to growing companies, these fundamentals apply across all business types and sizes.
How Space Penguin can help
Space Penguin provides flexible workspace solutions, virtual addresses, and business support services across Australia. Whether you need a professional registered address, a coworking desk, or a private office, we have options to suit every stage of your business journey.
Explore our full glossary for more essential Business setup terms and definitions.