The bloc is largely trying to wean itself off Russia energy but it has left it scrambling for other alternative, expensive, sources.
A windfall tax is imposed by a government on a company to target firms that were lucky enough to benefit from something they were not responsible for – in other words, a windfall profit.
Energy firms are getting much more money for their oil and gas than they were last year, partly because demand has increased as the world emerges from the pandemic and more recently because of supply concerns due to Russia’s invasion of Ukraine.
Earlier this week, 15 member states, including France and Italy, asked the EU to impose a price cap on gas bills to slow the soaring costs.
A decision has not yet been announced on a price cap.
In the UK, former Chancellor Rishi Sunak introduced a similar tax to Friday’s EU agreement in May, which he called the Energy Profits Levy.
It was applied to profits made by companies from extracting UK oil and gas, but not those that generate electricity from sources such as nuclear or wind power.