INFO 13
Australian Company Numbers
This is Information Sheet 13 (INFO 13). Every company in Australia is issued with a unique, nine-digit number when registered.
In plain English
INFO 13 explains Australian company numbers. Every registered company receives a unique nine-digit number.
This guidance, INFO 13, applies to all companies registered in Australia. It explains that each company is issued a unique, nine-digit Australian Company Number (ACN) upon registration. This number identifies the company for official purposes. The guidance is available on the ASIC website.
Why it matters
Your ACN is essential for legal and business operations. Use it when dealing with ASIC, banks, and other organisations. It helps identify your company accurately.
AI-assisted summary, grounded in the source link below. Generated 2026-05-23 via gemma3:12b.
Issuing regulator
ASIC →Topics
Source: https://www.asic.gov.au/for-business/registering-a-company/steps-to-register-a-company/australian-company-numbers/. Rules Mate indexes + summarises; always verify against the regulator's live publication.