As a GP there are a variety of structure options available to run your business. These include:
Sole trader: Cheap to set up and run, but with unlimited liability – and the highest tax rates could apply.
Family or Unit Trust: These are a flexible option that can work well for solo operators, or with other practitioners. Family or Unit Trusts also allow flexibility for tax distributions and longer term tax concessions. They can, however, be limiting in some circumstances if you wish to scale.
Company: Company structures provide limited liability and a capped rate of tax at 27.5%. However, they're a more rigid structure than a trust and need to comply with the Corporations Act. Companies do scale well and allow for multiple owners and changing circumstances.
Partnership: Partnership structures can suit two or more doctors who want to carry on a business and split profit. They're relatively cheap and easy to maintain, but partners are liable for each others' actions.
Associateship: This is when two or more doctors operate a practice together, but each doctor operates distinctly, and handles their own tax and legal requirements.
Assistantship: Applicable to non-owner doctors. In this situation the non-owner doctor is considered an assistant to the owner doctor. The assistant is viewed as an employee and is subject to employment laws, leave entitlements, superannuation etc.