We use the Australian Tax Office definition:
You are a small business if you are a sole trader, partnership, company or trust that:
- operates a business for all or part of the Australian financial year (1 July to 30 June), and
- has an aggregated turnover of less than $10 million
Your aggregated turnover is your annual turnover (all ordinary income you earned in the ordinary course of running a business for the financial year) plus the annual turnover of any entities you are connected with or that are your affiliates.