The study examined the impact of perceived organisational support on in-role performance and extra performance towards supervisors, co-workers and patients. A cross-sectional survey was conducted among medical officers and staff nurses working in primary health centres of Tamilnadu. From the results, it is found that perceived organisational support showed a positive impact of on in-role performance and extra role performance. It is found the extra role performance towards patients is greater compared to other job performance measures. The results of the study emphasise the public health department has to identify and reward substantial performers and review welfare policies that are perceived to be unattractive by healthcare professionals. Copyright © 2013 Inderscience Enterprises Ltd.