This study concerned the extent of adoption of internet banking and the factors affecting the adoption rate of internet banking services amongst the corporate customers of banks in Kenya. The need for the study arose in view of the increase in trends towards the adoption of internet banking. The study had two objectives namely to determine the extent of adoption of internet banking by corporate customers of the banks and to determine the factors that affect corporate customers’ adoption of internet banking in Kenya. The action taken by bankers and policy makers in appropriately addressing critical issues will determine the success of Internet banking. The respondents were selected using stratified and judgmental sampling. The respondents were the Finance Managers, ICT managers and General Managers and middle level management staff of the organizations respondents who were believed to have the knowledge required for the study.In view of the findings, several recommendations were made which may be useful for bankers and other related organizations. Banks should make their customers more aware of their new internet banking products and services, to encourage higher adoption.