International Journal of Academic Research in Business and Social Sciences September 2012, Vol. 2, No. 9 ISSN: 2222-6990 368 www.hrmars.com/journals User Satisfaction and Acceptance of Web Based Marketing Information System among Microfinance Institutions in Nairobi Region, Kenya Silvance O. Abeka Dept. of Computer Studies, Kampala International University- Dar es salaam College, PO Box 9790, Dar es salaam, Tanzania Email: silvancea@yahoo.com Abstract Acceptance of web based marketing information system has remained a topic of interest for a last few decades. Several theories, specifically over the conceptualisation of the technology acceptance model (TAM) have emerged and they have been applied in different contexts to investigate new insights into the acceptance behaviour at individual and organisational levels. The purpose of this paper is to determine whether a relationship exist between user satisfaction and acceptance of web based marketing information system (MKIs) among micro- finance institutions in Nairobi Region, Kenya. Anonymous and self-administered questionnaires were distributed to 383 respondents. A total of 370 usable responses were received, resulting in a response rate of 96.6% which was considered satisfactory for subsequent analysis. Due to the quantitative nature of the study, the results are analysed with statistical measures. The results indicated that Satisfaction was influential determinant of acceptance with t= 5.1568, p- value= 0.005 at 1% significant level. Theoretical contributions and practical implications of the findings are discussed and suggestions for future research are presented Keywords: User satisfaction, Acceptance, Web based Marketing Information System, Microfinance Institutions Introduction Acceptance of web based marketing information system has remained a topic of interest for a last few decades (Lai and Li, 2004). Several theories, specifically over the conceptualisation of the technology acceptance model (TAM) have emerged and they have been applied in different contexts to investigate new insights into the acceptance behaviour at individual and organisational levels. Web based Marketing information systems (MKIS) enable marketing and sales managers to identify, interpret, and react to competitive signals (Montgomery and Weinberg, 2002; Prabhu and Stewart, 2005) and are key elements leading to efficient marketing strategies and sales promotion strategies. As a global concept, marketing information can best be understood by its