In the last two decades, calls to place citizenship education (CE) at the top of national and European educational policy and research agendas have been gaining in prominence. Large-scale comparative studies, such as the International Civic and Citizenship Education Study (ICCS), are often considered the main evidence base for setting these agendas and improving CE policies and practices. This article therefore considers the ICCS study as an inherent part of the process of translating general, educational aims into curricular policies and practices of CE. However, while critical voices about comparative educational studies have become paramount, a detailed analysis of their contents, of what and how they measure and what they promote as the aims of education is often lacking. This article aims to fill this gap by analysing the main research documents, design and items of the 2009 ICCS study. To find out what ICCS promotes as the goals of citizenship education, we examined its normative assumptions in terms of qualification, socialisation and/or subjectification. Our analysis shows that the qualification and socialisation functions are dominantly validated in all aspects of the study, whilst there is only marginal attention to subjectification. This implies that ICCS misses an important potential to document and/or promote pupils becoming autonomous and critical democratic citizens, whilst this is often considered a central aim of citizenship education by policymakers, practitioners and teachers.