This article used text mining processes to map continuity and change in policy principles of the National Disability Insurance Scheme (NDIS) in Australia and reflect on the underlying agendas of reform. Specifically, this research aimed to: (1) examine the substantive content of the NDIS legislative, operational and reform documentation, (2) assess changes in objects, principles and issues over time, and (3) discuss the implications of these shifting logics and agendas. To achieve this, text mining approaches were applied to ten key NDIS documents from 2011 to 2019. The findings included a low prevalence of ‘rights’-based terminology, sustained attention to Scheme ‘costs’ but limited latterly attention to ‘sustainability’, and increasing prominence of interpersonal (e.g., ‘family’, ‘community’) and decision-making terminology (e.g., ‘decision’, ‘review’). How these shifts have influenced subsequent proposed reforms is explored and ongoing dilemmas about designing policy that ensures rights and entitlements, while balancing cost, sustainability and consistency are identified.