This guide is intended for policy makers interested in congestion charging as a potential policy to mitigate congestion in cities. The term ‘congestion charging’ is used to describe a distance, area or cordon based road-user charging policy around congested city centres as it has been introduced in Singapore, London or Stockholm. It does not cover priced-managed lanes which became popular in the United States in the last decade. The report attempts to provide concise information for early stages of scheme definition and development and guides through key decision-making processes. Its final objective is to describe how to develop the conceptual idea of ‘charging’ into a solid and feasible policy.