Donors have lagged behind aid recipients in adhering to the principles of aid effectiveness. Explaining the reasons for this demands greater awareness of organisational attributes within donor entities. To date, there have been only limited attempts to relate donor organisational factors to aid-effectiveness goals. This article elaborates on a number of such relationships based on an empirical examination of donor dynamics in Norway, the UK and Canada. Donor effectiveness provides an important lens through which to build a robust post-Busan global partnership.