Corporate Social Responsibility is the imperative of time for all business entities. Traditional method of Business practices has no longer suitable to competitive business world. CSR performance would be the best option for the sustainability of companies. This paper aimed to overview the CSR activities contributed by India’s top most two business groups in Indian major sectors of education structure, health System, environmental care and empowerment. For this purpose, secondary data collected CSR reports of TATA &RELIANCE group firms and evaluated the CSR performance. It is concluded that these two business giants are the significant contributors to Indian economy and society with their amazing responsible initiatives and efforts. The outcome of the paper will motivate other business entities to do more CSR works and it will boost up their profitability, Productivity and reputation