This research examines comparative effects of corporate governance internal mechanism on Profitability (ROA/ROE) in financial vs non-financial firms indexed on Pakistan Stock Exchange.The data of 296 firms (both types of firms) was taken from companies' audited accounts and various available documents of the State Bank of Pakistan for the period of 14 years (2001-2014). Panel data study is conducted as the data have the characteristics of both time series and cross-sectional. Multiple regression and fixed effect methods were employed to analyze the given dataset. Results revealed significance of both board characteristics and managerial ownership in the profitability of the selected companies.