In a globalized world in which the structures of the financial service industries are changing rapidly and becoming more and more competitive, the cost efficiency of financial institutions along with better quality of service have assumed crucial significance for their long-term sustainability. Hence, the nature of efficiency of financial institutions will determine the prospects of their success in meeting the challenges of a globalized world. The commercial banks in Pakistan are also facing the challenges of increased competition from foreign commercial banks while their operations over the years have also been called into question. However, the literature, which deals with questions of cost efficiency of commercial banks in Pakistan in a professional manner is scant. The information on relative technical efficiency of commercial banks, if available, can be helpful in designing policy for this important sector.