In many IS change circumstances the importance of project management capabilities has been emphasised in classic analyses. However, most studies focus only on the project supplier's viewpoint, and there has still been a lack of research on how the project owner’s management capabilities can lead to effective benefits management for IS projects. The aim of paper is to examine the concept of owner dynamic capability, and how their post-implementation benefits can be realised within the context of IS project and its continuously changeable transformation. Qualitative content analysis was adopted to investigate 15 government reports covering 31 IS projects in the UK public sector. Based on the empirical data, the findings demonstrate the significance of project back-end capabilities as one type of owner dynamic capability in managing post-implementation benefits from IS.