During the past few years, many people have been interested in purchasing goods and services via point of sales (POS). They have also wished to pay their bills, withdraw cash or transfer funds using automated telling machines (ATMs). These two facilities help banks’ customers carry less amount of cash and do their daily banking activities any time even when the banks are closed. This paper presents an empirical investigation to measure the relative efficiency of nearly 600 POS and ATM units associated with Bank Melli Iran located in city of Tehran, Iran. Using data envelopment analysis, the study has disclosed that only small portions of POS and ATM are working efficiently.