Multilateral aid accounts for over a third of total official development aid. The scale at which the multilateral system is used reflects donors’ views of it as an important aid channel. However, a clearer picture of the multilateral system is needed to analyse this channel, and the first ever OECD Development Assistance Committee (DAC) report on multilateral aid aims to address this gap. The report provides a snapshot of the multilateral aid architecture, from the funding of multilateral organisations by DAC members to their own multilateral aid strategies and policies. The report also highlights issues such as fragmentation, multilateral effectiveness, reform processes and partner country views.