What is ACN (Australian Company Number)?
The Australian Company Number is the 9-digit identifier ASIC issues to every registered Australian company. It must appear on company stationery, websites, and public documents. Companies also have an ABN; the ABN typically incorporates the ACN.
Current Rate (N/A)
N/A — A$571 ASIC registration fee (2025)
Example
When you register a Pty Ltd with ASIC, you receive an ACN like '123 456 789'. Your ABN is then issued as the ACN plus 2 prefix digits.
Related terms
The Australian Business Number is an 11-digit identifier issued to businesses by the Australian Business Register. Without an ABN, payers must withhold 47% from your invoice. Required for GST registration, business name registration, and most B2B trading.
A proprietary limited company is the most common Australian business entity. Owners' liability is limited to their share capital, and the company is a separate legal person. Maximum 50 non-employee shareholders. Must have at least one Australian-resident director.
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