This paper discusses the findings of a qualitative study carried out in the UK retail-bank sector on the implementation of Internal Marketing (IM). While the overall aim of Internal Marketing is the creation of a unified culture around the values of customer service, employee empowerment and service quality, the evidence suggests that Internal Marketing is perceived and enacted in ways that at times contradict such managerial rhetoric. The paper sheds light on what internal marketing is (its underlying principles within the organisations studied), the ways in which the banks studied use it in order to change their organisational culture as well as the difficulties encountered in implementing IM as a culture change agent. It concludes that the implementation of Internal Marketing in the banks under the study is problematic and does not result into a unified organisation culture. Indeed, implementing Internal Marketing is a process fraught with difficulty, which at times leads to divisions, ruptures and ambiguity in the newly created organisational culture.