Technical report with findings from cost benefit analysis in Solomon Islands (food security) and Vanuatu (infrastructure). This report also includes guidance for applying cost benefit analysis to climate risk management; and lessons learned. The report was designed to provide information on climate resilient development in Pacific Island communities through economic analysis of impacts and adaptation options in priority development sectors, in response to a range of future climate change scenarios. Economic analysis of climate change adaptation options aims to provide information and insight to ensure adaptation measures are taking into account climate risk. The intended audience is country decision makers, regional organisations and other donors who use cost benefit analysis as a decision support tool. This publication was developed by the Pacific-Australia Climate Change Science and Adaptation Planning (PACCSAP) programme.