This paper sets out the OECD’s assessment of the information technology (IT) systems for social services used by the public administration in Spain. It shows that large disparities exist between and within regions in the use of IT tools. The lack of unified systems and the different ways to identify individuals and classify services makes the exchange of information extremely challenging. Improving the national data collection on social services highlights the importance of agreeing on a common terminology and deciding on a set of indicators as well as designing a flexible IT infrastructure to collect the information.