This is exactly the kind of payroll tax case that can surprise growing businesses. Payroll tax is not always assessed one company at a time. Grouping rules can pull related businesses together, which may change whether payroll tax is payable and how much is assessed.
The Commissioner said Winya should be grouped with other entities. Winya said the grouping result was wrong or, at least, that it should be excluded. That made the factual record important: who owned the business, who controlled it, how directors and shareholders operated, whether services were shared, how the business made money and whether the business was genuinely separate from the alleged group.
For small businesses, the lesson is to review payroll tax before a corporate group gets messy. Shared back-office support, related investors, common directors or supplier/customer overlap may all be relevant. If a business wants to argue it is independent, it needs records that show real separate ownership, decision-making, operations and risk.