question: OBJECTIVES: To examine the perceptions of health professionals regarding the gaps in mental health service provision in Australia and their need for assistance in managing patients with mental illness. METHOD: A total of 570 health professionals participated in an anonymous online survey in January 2018 that assessed: i) health professionals' current levels of need for assistance in the management of patients with mental health conditions; and ii) perceived gaps in the mental health care system, and how these can be addressed. Data were analysed using a mixed-methods approach. RESULTS: Of those surveyed, 71.2% of health professionals and 77.3% of general practitioners reported that they required assistance in managing their patients with at least one stage of care for at least one type of mental disorder. Qualitative analyses revealed eight major themes in health professionals' perceptions of gaps in mental health service provision, including affordability and accessibility, the problems with crisis-driven care and the 'missing middle'. CONCLUSION: Overall, the results of this study provide a concerning insight into the substantial gaps in mental health care within the Australian system. Implications for public health: The results of this study add weight to ongoing calls for reform of and increased investment in the Australian mental health care system.