The .gov.au means it's official.
Australian government websites always use a .gov.au domain. Before sharing sensitive information online, make sure you're on a .gov.au site by inspecting your browser's address (or 'location') bar.
This site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.
Use this tool to check if your proposed business name is available. You can also see if there are:
Find out how to register and how you can protect your business name with a trade mark.