Long-term energy scenarios (LTES), which have been used for many decades as a vital planning tool for governments, can also serve to guide the transition to a clean, sustainable and increasingly renewable-based energy system. The Long-term Energy Scenarios for the Clean Energy Transition campaign, also known as the LTES campaign was initiated in May 2018 under the Clean Energy Ministerial (CEM) to promote the improved use and development of LTES for the clean energy transition. The LTES campaign is led by the governments of Denmark and Germany and coordinated by the International Renewable Energy Agency (IRENA). The report “Scenarios for the Energy Transition” assesses a collection of recommendations and country experiences gathered through the activities of the LTES campaign and the LTES Network (IRENA’s extension of the LTES campaign to cover non-CEM countries). The report covers how scenarios can better account for potentially transformational changes and how they can be better used for strategic decision-making by governments and investors. It also identifies approaches that can enhance institutional capacity for scenario planning.