You should choose a business name early in your planning stage.
If you're trading under your own name, you don't need to register a separate business name.
Registering a business name is not the same as registering a company. A company is a type of business structure.
Step 1. Check the name is available
Use the Australian Government's Business name check tool.
Step 2. Register the name
You can register a business name at the same time as applying for an Australian business number (ABN).
Do this using the Australian Government's Business Registration Service.