Bad debt has become the main cause of the difficulties they have experienced some financial systems and certain entities of considerable size. Thus, a high nonperforming loans is a serious problem that involves both the viability of the institution in the long run as the system itself. This research aims to analyze how the default affects on the profitability of The Piura Box - Huamachuco Agency 2006-2010? This was used longitudinal descriptive design time and descriptive analytical method, based on the technique of observation data collected from documentary review of the institution. It was noted that the loan portfolio have increased year after year, reaching 513% growth from 2006 to 2010. But is that a delinquency in the portfolio has increased by 2.851% over the 2006 to 2010, which is very high arrears. Getting a negative return in 2010. Profitability of placements depends on the le...