This report examines the key design and implementation features that need to be considered to ensure that biodiversity offset programmes are environmentally effective, economically efficient, and distributionally equitable. Biodiversity offsets are being increasingly used in a wide range of sectors as a mechanism to help compensate for the adverse effects caused by development projects in a variety of ecosystems. In this report, insights and lessons learned are drawn from more than 40 case studies from around the world, with an additional 3 in-depth country case studies from the United States, Germany and Mexico.