In April 2026, New York City Mayor Zohran Mamdani stood outside a $238 million penthouse on Billionaires' Row and filmed a one-minute video. The apartment belongs to hedge fund billionaire Ken Griffin, founder of Citadel. The video announced a new 'pied-à-terre' tax — French for 'foot on the ground,' meaning a second home — on properties in the city worth more than $5 million. Backed by Governor Kathy Hochul, the levy would hit about 13,000 properties (roughly 0.4% of the city's 3.7 million housing units) and raise an estimated $500 million annually. By any objective measure, this is a narrow tax. So why has it triggered such a furious response from New York's wealthiest residents?
The answer is not really about money. Yasser Salem, who chairs the pro-business group OneNYC, called the financial impact on billionaires 'a rounding error.' A Miami-based businessman who owns an apartment in the West Village told reporters the tax was financially manageable but 'shameful' — and that he wouldn't leave because his grandchildren live nearby. Even Scott Bok, the former chief executive of investment bank Greenhill & Co., conceded the tax wouldn't be the thing driving anyone out of the city. Yet wealthy New Yorkers are bombarding their financial advisers with angry calls, asking them to mitigate a levy whose exact rate hasn't even been announced.
Here's the catch: the backlash is being driven by symbolism and uncertainty, not arithmetic. Griffin, speaking at the Milken Conference in Beverly Hills, called the video a personal attack and said it 'triggered the trauma' he experienced in Chicago — where Citadel was headquartered before relocating to Miami four years ago. He vowed to 'double down' on Florida. Steven Fulop, head of the Partnership for New York City, warned the tax could have a 'chilling impact on economic investment,' driving away companies whose executives live elsewhere. Tax lawyer Mark Klein, who advises some of the country's wealthiest residents, described his clients as 'in purgatory' — angry but waiting for details before deciding anything drastic.
The symbolism is already moving markets. Luxury brokerage Corcoran reported that in the two weeks after the announcement, 20% of its agents had clients pausing or cancelling deals, with an average price of $15.7 million. Patrick Dwyer, a wealth adviser at NewEdge Wealth in Miami, framed the policy in moral terms: the progressive movement, he said, was 'the most dangerous thing for the upper-middle-class professional that's ever happened in these big cities,' arguing that governments 'crush' people just as they start making real money.
But history complicates the apocalyptic predictions. Wealthy New Yorkers have threatened to flee for Miami many times before, and evidence of an actual exodus has been mixed. The Miami businessman who called the tax shameful admitted there was 'literally no dollar amount' that would make him leave his family. Bok noted that people are on a 'hair-trigger alert' for anything Mamdani does, but that the tax itself is unlikely to be decisive. The deeper question raised by this fight isn't whether $500 million is worth collecting — it's whether public political theatre can change private financial behaviour even when the underlying numbers don't justify the reaction. So far in New York, the answer appears to be yes, at least in the short run.
When a mayor films a campaign video outside a $238 million penthouse to announce a new tax, the city's billionaires don't just complain — they threaten to take their money, jobs, and skyline-defining towers with them.
New York Mayor Zohran Mamdani has proposed a 'pied-à-terre' tax — an annual levy on second homes in the city worth more than $5 million. Governor Kathy Hochul backed the plan, which she says would affect roughly 13,000 properties (about 0.4% of the city's 3.7 million housing units) and raise around $500 million a year.
The political fuse was lit when Mamdani filmed a video outside Citadel founder Ken Griffin's $238 million penthouse on Billionaires' Row to launch the policy. Wealthy New Yorkers are now flooding their financial advisers with angry calls, even though the exact tax rate has not yet been published.
This isn't really a fight about $500 million — that's a rounding error in a city budget. It's a fight about *who* gets singled out, and whether public symbolism changes private behaviour.
This is one of the clearest live experiments in a debate you'll be voting on for decades: can cities tax their wealthiest residents without driving them away? New York's answer will shape housing affordability, school funding, and which cities you can actually afford to live in after college. It's also a case study in modern politics — a one-minute video viewed 52 million times can move billions in real estate decisions.
Massachusetts, Washington State, and Rhode Island have all moved to tax incomes over $1 million; California voters will soon decide on a billionaire tax. If New York's pied-à-terre experiment raises real money without triggering a measurable exodus, expect copycat policies in London, Paris, and other 'global' cities where the ultra-rich park wealth in empty trophy apartments. If it backfires — fewer luxury construction jobs, falling property values, billion-dollar projects cancelled — it'll become Exhibit A for every politician who argues taxing the rich is self-defeating.