Research undertaken at the University of Manchester (UoM) highlights the need to address issues of accountability and reflexivity within the NGO sector, and has contributed towards both performance improvements within individual NGOs, as well as the strengthening of sector-wide policies. Impacts have been achieved through a process of ongoing consultation and feedback: identifying, anticipating and analysing key challenges, generating new conceptual frameworks, and building critical relations between the academy and practitioners. This contribution has been clearly acknowledged by both NGOs and other development agencies. In particular, the research has directly assisted the work of organisations and groups as varied as: governments (e.g. El Salvador’s); major international NGOs based in both the global north (e.g. The One World Trust, Mango) and south (SDI, BRAC); and bilateral and multilateral aid agencies (e.g. DFID, UNRISD).