Abstract: Successful ERP implementation comes with various business competitive advantages, however, Small Medium Enterprises (SMEs) are facing great difficulties and challenges in achieving successful ERP implementation compared with Large Enterprises (LEs). Thus, this study presents the findings of field work and interview conducted on SME critical factors for successful implementation of enterprise systems. It proposes CSFs for a successful ERP implementation within SMEs. This study make used of qualitative one-on-one in-depth interview research design. There are 60 respondents for this study from 5 different positions such as IT personnel, ERP constants/Project Manager, ERP users, top management and customer. Those 60 respondents are from twelve different companies within northern region of Malaysia. The findings of this study identified eight CSFs that influence successful implementation of ERP in SMEs which include accessibility, flexibility, simple system, cost-effectiveness, increased productivity, customer’s needs, time and resources saving and reduced personnel. These 8 CSFs are categorized into two group namely enhanced data processing and expansion. Hence, this study argues that these eight CSFs are essential for successful ERP implementation within SMEs in order to aid business long-term growth and expansion.