ISEAL works to improve the credibility and impacts of sustainability standards and understanding impacts is an important strategic goal. This paper is the first attempt to draw on internal performance monitoring data of schemes and external research to analyse the reach and characteristics of smallholder farmers within ISEAL member agriculture schemes. This is the third in a series of collective reporting briefing papers researched by ISEAL as part of the ‘Demonstrating and Improving Poverty Impacts’ (DIPI) project.