Abstract
This study investigates the impact of various elements of customer services adopted by some Nigerians banks to improve bank profitability in the Nigerian banking industry. It examines the mean profit and how each of the customer service elements adopted by the banks has impacted on the banks profitability and the level of impact of each of them. The study applies a pure quantitative analysis using five big Nigerian banks as a case study within a framework called the Queuing technique. Queuing Analysis revealed that the average time a bank customer spends waiting in the queue to carryout banking transaction has a linear relationship with the bank profitability. After the 2004 Nigerian banks consolidation and the recent failure of banks, leads to the study that examines the effectiveness of customer service on banks profitability. We found out that poor customer service management in banks may reduce banks profitability and thus may cause bank financial distress. However, the study also establishes that there is an inverse relationship between banks customers services and profitability in Nigeria banks.