The paper aims to contribute to the development of an e-Government capabilities repository. The purpose of this repository is to increase the level of success of the e-Government projects and initiatives. The results are based on an examination of a multidisciplinary body of knowledge, an iterative structured methodology and a comparative in-depth case study performed in two Canadian public administrations. We analyzed the data to identify the presence or absence of the capabilities, the evolution of these capabilities and their interrelationship. We proposed a preliminary knowledge repository of e-Government capabilities composed of 4 interdependent categories: the strategic capabilities, the project capabilities, the business capabilities and the technological capabilities.