This simple guide is for shelter practitioners on implementing market-based programming in humanitarian and development responses. Market-based programming (MBP) refers to any type of humanitarian or development program, in any sector, that uses, supports, or develops local markets. It involves implementing interventions to meet immediate humanitarian or longer-term recovery needs, in a way that does not undermine existing economic relationships and activities, so as to facilitate economic recovery and ensure lasting impact. To illustrate the types of market-based programs implemented by humanitarian and development actors, the Markets in Crises Community of Practice (CoP) designed the Market-Based Programming Framework. This framework focuses on an understanding of markets as market systems rather than places. It can be applied to all sectoral or multi-sectoral MBP, including shelter programming.