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eu tax observatory
2% Wealth Tax on Just 3,000 Billionaires Could Raise $250 Billion a Year: Nobel Economists
"Not only is it necessary to impose a stronger burden of justice on billionaires, but more importantly, it is possible."
Jul 07, 2025
Seven Nobel laureates on Monday published an op-ed advocating for "a minimum tax for the ultrarich, expressed as a percentage of their wealth," in the French newspaper Le Monde.
"They have never been so wealthy and yet contribute very little to the public coffers: From Bernard Arnault to Elon Musk, billionaires have significantly lower tax rates than the average taxpayer," wrote Daron Acemoglu, George Akerlof, Abhijit Banerjee, Esther Duflo, Simon Johnson, Paul Krugman, and Joseph Stiglitz.
Citing pioneering research from the E.U. Tax Observatory, the renowned economists noted that "ultrawealthy individuals pay around 0% to 0.6% of their wealth in income tax. In a country like the United States, their effective tax rate is around 0.6%, while in a country like France, it is closer to 0.1%."
Although the "ultrawealthy can easily structure their wealth to avoid income tax, which is supposed to be the cornerstone of tax justice," the strategies for doing so differ by region, the experts detailed. Europeans often use family holding companies that are banned in the United States, "which explains why the wealthy are more heavily taxed there than in Europe—though some have still managed to find workarounds."
The good news is that "there is no inevitability here. Not only is it necessary to impose a stronger burden of justice on billionaires, but more importantly, it is possible," argued the economists, who say that taxing the overall wealth of the ultrarich, not just income, is the key.
The wealth tax approach, they wrote, "is effective because it targets all forms of tax optimization, whatever their nature. It is targeted, as it applies only to the wealthiest taxpayers, and only to those among them who engage in tax avoidance."
💡 "One of the most promising avenues is to introduce a minimum tax for the ultra-rich, expressed as a percentage of their wealth."Seven Nobel laureates in economics advocate for the Zucman tax in their latest op-ed.Read the full @lemonde.fr article 👇www.lemonde.fr/idees/articl...
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— EU Tax Observatory (@taxobservatory.bsky.social) July 7, 2025 at 8:05 AM
The anticipated impact would be significant. As the op-ed highlights: "Globally, a 2% minimum tax on billionaire wealth would generate about $250 billion in tax revenue—from just 3,000 individuals. In Europe, around $50 billion could be raised. And by extending this minimum rate to individuals with wealth over $100 million, these sums would increase significantly."
That's according to a June 2024 report that French economist and E.U. Tax Observatory director Gabriel Zucman prepared for the Group of 20's Brazilian presidency—which was followed by G20 leaders' November commitment to taxing the rich and last month's related proposal from the governments of Brazil, South Africa, and Spain.
"The international movement is underway," the economists declared Monday, also pointing to recent developments on the "Zucman tax" in France. The French National Assembly voted in favor of a 2% minimum tax on wealth exceeding €100 million, or $117 million, in February—but the Senate rejected the measure last month.
The economists urged the European country to keep working at it, writing that "at a time of ballooning public deficits and exploding extreme wealth, the French government must seize the initiative approved by the National Assembly. There is no reason to wait for an international agreement to be finalized—on the contrary, France should lead by example, as it has done in the past," when it was the first country to introduce a value-added tax (VAT).
"As for the risk of tax exile, the bill passed by the National Assembly provides that taxpayers would remain subject to the minimum tax for five years after leaving the country," they wrote. "The government could go further and propose extending this period to 10 years, which would likely reduce the risk of expatriation even more."
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G20 Leaders Reach 'Landmark Commitment' for Global Tax on Ultrarich
"Now is the time to turn words into action and launch an inclusive international negotiation, extending beyond G20 countries, on the reform of the taxation of the superrich," said economist Gabriel Zucman.
Nov 19, 2024
Acknowledging that "the era of the billionaire" is still in full swing across the globe, economic justice advocates on Tuesday applauded a "landmark commitment" by G20 leaders at the group's annual summit in Rio de Janeiro, where delegates agreed to cooperate on efforts to ensure the richest households in the world are taxed fairly.
The final communiqué out of the G20 Summit includes a commitment from 19 countries, the European Union, and the African Union, to "engage cooperatively to ensure that ultra-high-net-worth individuals are effectively taxed."
"Cooperation could involve exchanging best practices, encouraging debates around tax principles, and devising anti-avoidance mechanisms, including addressing potentially harmful tax practices," reads the communiqué. "We look forward to continuing to discuss these issues in the G20 and other relevant forums, counting on the technical inputs of relevant international organizations, academia, and experts."
The final text was brokered by Brazilian President Luiz Inácio Lula da Silva, commonly known as Lula, and the E.U. Tax Observatory noted that Argentina's right-wing president, Javier Milei, "failed to convince other G20 countries to block the communiqué."
The meeting took place less than a year after economist Gabriel Zucman, director of the E.U. Tax Observatory, published a report titled A Blueprint for a Coordinated Minimum Effective Taxation Standard for Ultra-High-Net-Worth Individuals, which informed G20 finance discussions leading up to the summit.
"A minimum tax on billionaires equal to 2% of their wealth would raise $200-$250 billion per year globally from about 3,000 taxpayers; extending the tax to centimillionaires would add $100-$140 billion," said Zucman, a leading expert on tax avoidance and reducing inequality, in the report.
Billionaires' effective tax rate is currently equivalent to 0.3% of their wealth, requiring them to pay a far lower rate than middle-class taxpayers.
Zucman hailed the agreement out of the summit in Rio de Janeiro as a "historic decision" and said concrete action by the world's governments must follow.
"Now is the time to turn words into action and launch an inclusive international negotiation, extending beyond G20 countries, on the reform of the taxation of the superrich," said Zucman.
Along with Milei, the Biden administration pushed back this year as the G20 weighed Zucman's tax proposal. Treasury Secretary Janet Yellen told The Wall Street Journal in May that the "notion of some common global arrangement for taxing billionaires with proceeds redistributed in some way—we're not supportive of a process to try to achieve that. That's something we can't sign on to."
As Common Dreams reported Tuesday, the U.S. is one of eight countries that are contributing to an international loss of $492 billion in taxes each year as multinational corporations and ultrawealthy individuals underpay. The eight countries—which also include Australia, Canada, Israel, Japan, New Zealand, South Korea, and the U.K.—oppose a United Nations tax convention.
Jenny Ricks, general secretary of the Fight Inequality Alliance, said that particularly with U.S. President-elect Donald Trump set to take office in January, "we live in the era of the billionaire."
"We need to move to the era of the 99%," said Ricks. "This shift won't come easily. The U.S. elections have shown how the superrich can use their wealth and power to influence policies and shape the outcomes of elections. Leaders like Trump in the U.S. and Javier Milei in Argentina are actively working to derail international cooperation, while politicians around the world fail to oppose the vested interests that continue to benefit from such unequal societies."
"We will fight harder than ever before to transform the rhetoric on taxing the rich into a global reality," she added. "We need more equal societies in which the richest no longer hold all the power and wealth, with devastating consequences. We need to redistribute the wealth of the superrich to fund vital public services and the response to climate change. Such a transformation is essential to creating the alternative we seek to today's broken system."
Viviana Santiago, executive director of Oxfam Brazil, applauded Lula's government and the G20 leaders for responding "to people's demands worldwide to tackle extreme inequality, hunger, and climate breakdown, and particularly for rallying action on taxing the superrich."
"G20 governments deserve praise for their groundbreaking commitment to cooperate on taxing the world's superrich. But we won't rest until this delivers real change for people and planet," said Santiago, adding that governments now ostensibly supporting a tax on billionaires' wealth should also "be championing a $5 trillion climate finance goal at COP29," the U.N. summit set to wrap up in Baku, Azerbaijan this week.
"How can they argue that climate justice is unaffordable with a deal to raise trillions of dollars by taxing the superrich on the table?" she asked.
Quentin Parrinello, policy director at the E.U. Tax Observatory, asserted that negotiations on the tax proposal "must now extend to a much more inclusive space than the G20."
"Such reforms don't happen overnight, but time is pressing," said Parrinello. "This agenda is even more important today, with the risk of geopolitical fragmentation and looming wealth concentration fueling inequality and undermining democracy."
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