Full cost benefit analysis of REDD+ projects and activities are challenging due to the fact that few studies quantify all elements. Indications are that the full cost of REDD+ on average, including opportunity, implementation and transaction costs, are below 25USD per ton of CO2eq, but estimates of non-monetary and indirect benefits of REDD+ are lacking due to a lack of expertise and inadequate information about environmental and biodiversity benefits (Rakatama et al., 2017).