Enterprise Resource Planning (ERP) systems influence organisational performance and business strategies significantly. However, identifying, managing, and realising expected benefits of ERP is challenging. The existing ERP research has largely focused on the implementation phase leaving post-implementation development understudied. Yet, post-implementation development ensures continuing benefits. This paper documents a single-case study on benefits realisation in post-implementation ERP development. The results imply that benefits realisation practices can improve job satisfaction while lack of it can lead to unused solutions. Outdated and evolved business processes, complicated further by workarounds, hinder on-going ERP development. Consequently, benefits realisation is hindered as well. Moreover, when subsidiaries are unable to identify new benefits on their own and while the benefits may even vary from one subsidiary to another, the complexity of benefits realisation increases. Altogether, the article highlights four empirical findings on issues influencing post-implementation benefits realisation and four issues on post implementation ERP development in general. (C) 2021 The Authors. Published by Elsevier B.V.