GP payroll tax changes would be hardest on those 'most vulnerable', patient warns Starting in July, GP clinics in South Australia will be responsible for paying payroll tax for doctors they employ, a move opposed by the Royal Australian College of GPs. The government claims that some clinics have been avoiding tax obligations. Concerns have been raised that increased costs may deter vulnerable patients from seeking medical treatment, potentially leading to more emergency department visits. The SA treasurer plans to meet with GPs in the coming days to address the issue.