On 6 October 2022, the European Union (EU) formally adopted the new Regulation introducing emergency measures to mitigate high energy prices and the risk of supply shortages in Europe.The two tax-related measures include a revenue cap on infra-marginal electricity producers and a temporary solidarity contribution over the surplus profits of companies in the crude petroleum, natural gas, coal, and refinery sectors. Some EU Member States have expressed concern that the adoption of the Regulation under qualified majority voting sets a precedent for adoption of future EU tax rules.Executive summaryOn 6 October 2022, EU Member States formally adopted via written procedure...