In conceptualisation of impact assessment, there are a number of variables that the assessors can consider. These present a complex set of links among the variables of the study because the casual effect among the variables may be influenced by different factors (Hulme, 2000). In this regard, the assessors may focus their attention in different areas of impact assessment. For example, if the objective of a microfinance project is to provide loans to poor people in order to improve their standard of living, then the impact assessment study will reveal whether the standard of living of the targeted group has improved or not. Likewise, if the objective of microfinance providers is to facilitate the growth of enterprises, impact assessment will show whether the growth of these enterprises has been realised or not. This paper assessed the impact of microfinance services on growth of micro and small enterprises.