This document provides an overview of the informal economy in developing countries. It discusses the development and definitions of the informal economy, how it is measured, and its composition across different world regions. It finds that the informal economy has significantly grown in most developing nations and now constitutes a large share of employment. Common obstacles faced by informal enterprises include access to finance, regulatory burdens, and lack of property rights. The document reviews policies by governments and international organizations to support the informal economy. It examines Sida's approach and finds room to increase knowledge of the informal economy and target interventions more clearly. Overall, the document argues for the need to develop innovative policies that recognize the contributions of informal actors and help facilitate their graduation to the formal economy.