Recent years have seen renewed and growing interest in carbon taxes that put a price on greenhouse gas (GHG) emissions. This Guide by the Partnership for Market Readiness (PMR) provides a practical tool to help policymakers determine whether a carbon tax is the right instrument to achieve their policy goals and to support them in designing and implementing a tax that is best suited to their specific needs, circumstances and objectives. The guide provides both conceptual analysis and important practical lessons learned from implementing carbon taxes around the world. The publication is available to download on the World Bank Group website.