The idea would redirect part of the proceeds from the OECD's 2021 tax deal, which compels EU countries to levy a 15% minimum corporate tax on multinationals with annual turnover above €750 million, to the EU budget. Currently, the revenue is collected by national governments.
European Council President António Costa is pressuring leaders to reach a budget deal by the end of the year, before upcoming elections in Poland, France and Italy risk derailing negotiations. The latest budget proposal, worth €1.82 trillion, was tabled earlier this month.
EU governments remain divided over five proposed new taxes that the Commission estimates would generate €65 billion per year. One option, a corporate tax called CORE that charges a lump sum on companies' revenues exceeding €100 million, has proved particularly unpopular, notably in Germany.
French President Emmanuel Macron supported funneling part of the tax on multinationals to the EU budget during an October summit, according to two of the diplomats.
Pascal Saint-Amans, a former OECD official who helped design the global tax arrangement, defended the potential new revenue source. "The corporate income tax is about taxing companies based on their profitability. CORE is not about that, CORE is about taking a toll blindly," he said. He added that multinationals' "activities are taking place in Ireland, but are about managing the EU markets," arguing that it "could make sense" to allocate top-up taxes to the EU budget.
Redirecting the revenue could hit low-tax countries such as Ireland and the Netherlands, which collect large sums from the top-up tax. The Dutch government collected €449 million in 2026 from returns related to the global minimum tax, according to Bloomberg.
Costa's team and the Commission are looking into the option before bilateral discussions with EU countries starting next week, with a leaders' summit scheduled for November 26–27.