Non interest income now accounts for over 40 percent of operating income in the U.S. commercial banking industry. This essay tries to determine links between bank non interest income, business strategies, technological change, and financial performance between 1988 and 2008. The results indicate that bank size plays a dear role in generating non interest income, while any attention towards core banking activities contribute more to interest income. Well-managed banks are present in non interest income activities, but their transition is slow and pre-planned. Non interest income is co-excising with interest income and leads to increased profitability ratios, but should be considered a secondary source of income, supplementary of core banking activities.