Background: Migrants settling in a new country experience multiple complexity to navigate health systems and ways of living. In South Asia, migrating to developed countries for better life opportunities has been the ongoing trend and migration to Australia has significantly increased in recent years. The lower utilisation services and higher risks of chronic diseases among South Asian migrants has been an ongoing challenge for the health system to tackle and little is known why these groups of population do not access services. This study aimed to explore the factors influencing experiences of accessing health services by South Asian migrants in Australia. Methods: Using mixed method design, 62 online surveys and 14 in-depth interviews were conducted with participants from four countries of South Asia - Nepal, India, Bhutan, and Sri Lanka. Participants were recruited using a purposive snowball sampling approach following the standard ethical process. Survey data were analysed descriptively in SPSS to derive relationships between variables. Interview data were recorded, transcribed, and analysed thematically. Results: South Asian migrants experienced various complexities while accessing health services in Australia. Experiences of accessing health services highlighted a number of factors; long waiting periods to access public health services, expensive nature of private health services and communication problems due to socio-cultural differences. While these migrants have comparatively better experiences about the services in Australia than in their home country, they have expectations for affordable, timely, respectful, and culturally friendly services. South Asian migrants shared the possibility of making services accessible to them by investing more resources in the health sectors, so they can receive the expected quality of care in public settings. Conclusions: Limited evidence is available to understand the factors leading to lower utilisation of services and higher risks of chronic diseases among South Asian migrants. So, this study highlighted numbers of social, cultural, financial, and institutional factors that are critical to design appropriate health service strategies. This study recommended incorporating a collaborative and culturally competent model of care to increase access to services which can further help to reduce existing disparities in health outcomes among migrant populations.