With 120 million hectares of forest area, Indonesia has the third largest area of biodiversity-rich tropical forests in the world, and it is well-known as a mega-biodiversity country. However, in 2020, only 70 percent of this area remained forested. The government has consistently undertaken corrective actions to achieve Sustainable Development Goal targets, with a special focus on Goals #1 (no poverty), #2 (zero hunger), #3 (good health and well-being), #7 (affordable and clean energy), #8 (decent work and economic growth), #13 (climate action), and #15 (life on land). Good environmental governance is a core concept in Indonesia’s forest management and includes mainstreaming ecosystem services as a framework for sustainable forest management. This paper analyzes efforts to mainstream Indonesia’s remaining forest ecosystem services. We review the state of Indonesia’s forests in relation to deforestation dynamics, climate change, and ecosystem service potential and options and provide recommendations for mainstreaming strategies regarding aspects of policy, planning, and implementation, as well as the process of the articulation of ecosystem services and their alternative funding.