The Tool for Rapid Assessment of City Energy (TRACE) offers cities a quick and easy way to assess their energy efficiency and identify sectors to improve. This tool prioritizes sectors with significant energy savings potential, and identifies appropriate energy efficiency interventions across six sectors—transport, buildings, water and waste water, public lighting, solid waste, and power and heat. It is a simple, low-cost, user-friendly, and practical tool that can be applied in any socioeconomic setting. TRACE consists of two principal components: (i) a city energy benchmarking tool and (ii) a "playbook" of tried and tested energy efficiency interventions. These two components are woven into a user-friendly software application that takes the city through a series of sequential steps: from initial data gathering to a report containing a matrix of energy efficiency recommendations tailored to the city’s individual context, with implementation and financing options.