New York City Mayor Zohran Mamdani has announced a new tax on second homes valued above $5 million, framing it as a way to make wealthy nonresidents 'contribute' more to the city. He argues that individuals who store wealth in city real estate without living there harm working residents, though critics say these property owners already pay high property taxes while using few public services.

Opponents contend the proposal amounts to a second layer of taxation and risks driving away major donors and employers. Hedge fund executive Ken Griffin, whom Mamdani publicly referenced, has donated hundreds of millions of dollars to city institutions including Memorial Sloan Kettering, the Museum of Modern Art, the Museum of Natural History, and the Robin Hood Foundation. His firms also employ thousands of people in the city and are developing a major skyscraper in Midtown.

The debate highlights broader concerns about wealth, inequality, and mobility. Critics warn that highly affluent individuals and businesses can relocate to lower-tax states, as Griffin previously did when moving his company from Chicago to Florida. They argue that policies perceived as hostile to the wealthy could shrink the city’s tax base and reduce private investment and philanthropy.