As the impacts of climate change are beginning to become visible, there is growing concern about the possible costs of inaction. However, before adequate assessments of the costs of climate change impacts can be made, there are various methodological questions to consider. As part of Ecologic’s framework contract with the EEA on environmental-economic activities, FEEM, IVM and Ecologic perform a review of studies on the costs of climate change impacts and give methodological recommendations for future evaluations.