A set of performance indicators are used to evaluate the performance of the Power Grid Company of Bangladesh (PGCB). This paper efforts to develop the framework and define parameters, which can be used to evaluate the operational (financial and technical) performance of Bangladesh power transmission system. This paper also evaluates the key performance indicators (KPIs) during last three fiscal years (2013-2014 to 2015-2016) of Bangladesh Transmission Grid. The obtained results are analyzed and explained in terms of KPIs. By analyzing these results a company can monitor the trend of different KPIs, take necessary actions, plan for future expansion, set targets for upcoming years and comparison can be made with international benchmarks.