Will Mamdani pass the 2% Millionaire Tax before 2027?

Prediction markets put the probability at 12%: Will Mamdani pass the 2% Millionaire Tax before 2027. Currently, markets see this as unlikely (12% YES). Mayor Mamdani Pushes to Shrink New York Business Tax Credit.

What’s Happening

New York City Mayor Zohran Mamdani is intensifying his push to reshape the city's tax code, most recently by pressuring state lawmakers in Albany to limit the pass-through entity tax (PTET) credit, a break he has characterized as a "tax cut for the rich." The move, which has delayed the city's $127 billion budget, targets hedge funds and private equity firms and is part of a broader strategy to fund progressive initiatives. This effort runs parallel to his high-profile campaign to institute a pied-à-terre tax on luxury second homes, a proposal that has drawn sharp criticism from billionaires like Citadel CEO Ken Griffin, whom Mamdani singled out in a video outside Griffin's $238 million Central Park penthouse. The political calculus behind these measures is central to the question of whether Mamdani can pass the 2% millionaire tax before 2027, a policy that would impose a surcharge on high-income earners to generate revenue for public services. [Insurance Journal, May 04] [BBC News, May 06]

The viability of Mamdani passing the 2% millionaire tax faces significant headwinds, as recent fiscal analyses have cast doubt on the projected revenues from his current tax proposals. City Comptroller Mark Levine released a study on May 3, 2026 indicating that the proposed pied-à-terre tax on luxury second homes could generate nearly $200 million less than the promised $500 million, and might actually cost the city roughly $40 million annually due to a potential exodus of wealthy residents, mirroring outcomes seen in Vancouver, Canada. This skepticism is compounded by a broader political battle: Mamdani has joined top economists and Senator Bernie Sanders in denouncing the U.S. tax system as "rigged," framing the millionaire tax as a matter of equity. However, opposition from powerful financial figures and state-level resistance from Governor Kathy Hochul, who has negotiated a separate pied-à-terre tax deal, suggest that the path to enacting the 2% surcharge by 2027 remains narrow, with current assessments showing only a 12% likelihood of passage. [Realtor.com, May 03] [Common Dreams, May 06]

Looking ahead, the next critical juncture for Mamdani passing the 2% millionaire tax will be the ongoing budget negotiations in Albany, where the mayor has already delayed the city's spending plan to force a confrontation over the PTET credit. The outcome hinges on whether Mamdani can secure enough support from state legislators to override opposition from business groups and wealthy individuals who have labeled his tactics "creepy" and warned of a capital flight from New York. The mayor's aggressive rhetoric, including a video targeting Griffin's penthouse and public rallies with Sanders, has energized his progressive base but has also hardened resistance among fiscal conservatives and real estate interests. If the pied-à-terre tax deal with Hochul falters or generates less revenue than expected, momentum for the broader millionaire tax could stall, making the 2027 deadline increasingly improbable. The market currently reflects this uncertainty, with an 88% probability that the tax will not be enacted within the timeframe. [CNN, May 07] [Traded on Polymarket — $59K Volume

Lower-volume market on Polymarket ($59K). Wider spreads expected — enter with limit orders and be aware of slippage risk. Currently 6c YES.