Indian economic growth is largely supported by the banking sector. Profitability of a bank depends on the amount of capital available with the bank for business activities. Public sector banks are largely funded by the government and hence the equity component in the share capital is quite less than that of private sector banks. The question is how efficiently the capital is used. Are the profitability ratios true reflections of the performance of a bank? In the present paper, the top 12 banks that form the BSE Bankex are selected to study the performance of the banking sector in India in the last six years. The performance of the banks was studied using DuPont model, as DuPont analysis provides much deeper understanding on the efficiency of the bank. The findings reveal that the performance of the bank cannot be judged by profit or some ratios alone and that the banks that made more profits were not really efficient.