The Mamdani administration has released rules for how New York City's new pied-à-terre tax will be enforced, with the first surcharge notices expected in the coming weeks.
The Department of Finance is required to notify owners of thousands of luxury secondary homes by August 30 that their properties have been deemed eligible for the tax, according to proposed guidelines reported by The Real Deal and confirmed by multiple law firm analysesfollowing the city's release of proposed rules detailing how the surcharge will roll out. The agency can audit records going back six years and has subpoena power to determine whether a property is taxable or exempt.
The tax applies to one to three family homes valued at $5 million or more, and to co-ops and condos worth $1 million or more in the initial phase, if they are unoccupied non-primary residencescovering Class 1 properties such as one, two and three family homes along with Class 2 condominium and cooperative properties. Owners who provide false or misleading information can face penalties of up to 50% of the tax billif the Department of Finance determines that submitted documentation was inaccurate, misleading in a material way, or filed negligently or in bad faith, a measure aimed at curbing what officials describe as gamesmanship, including cases where properties are split into multiple units in bad faith to avoid the surcharge.
The city specifically cited as an example a condominium property divided into more than three units in order to dodge the surcharge, where such division was undertaken in bad faith. Officials say the provision is meant to raise the cost of evasion while still preserving property owners' right to challenge any penalty imposed against them.
Property owners will have 30 days after receiving notice to appeal, either to the city Tax Commission or, in some cases, directly to the Department of Finance, where they can submit documentation such as a state or federal tax return listing the property as a primary residence, or other proof of residency.
The surcharge, a centerpiece of Mayor Zohran Mamdani's redistributive tax agenda, is expected to raise at least $500 million a year and to affect roughly 10,000 single family homes, co-ops and condominiums citywide.
Rates in the first phase, covering the 2026-2027 and 2027-2028 fiscal years, run 4% for properties worth between $1 million and $3 million, 5.25% for those between $3 million and $5 million, and 6.5% for those above $5 million. Experts note that the city's assessment system tends to undervalue properties significantly, with city valuations sometimes running at 10% or less of true market value, softening the apparent burden of the steep percentage rates.
A second phase set to begin in the 2028-2029 fiscal year will shift to a sales based valuation model, raising assessed values for condos and co-ops and aligning their rates with those for one to three family homes. The law is set to expire on June 30, 2031, unless renewed by the State Legislature.
The rules are expected to take effect after the public comment period closes on July 9.
The real estate industry has warned of legal challenges, with one law firm noting the legislation is likely to face state and federal court litigation given the speed with which it was enacted and the limited public scrutiny it received beforehand. Co-op industry representatives have also raised concerns that boards lack the legal authority to serve as collection agents for the tax on behalf of shareholders, a role the new law effectively assigns to them.
Billionaire hedge fund manager Ken Griffin's city property tax bill is projected to more than double under the new levy. Griffin's property tax bill for the 2026-2027 tax year currently stands at $858,332, and is expected to climb to roughly $1.87 million under the pied-à-terre surcharge, according to calculations cited by CNBC. The Citadel founder, who is a Florida tax resident, became the public face of the tax after Mamdani filmed a video outside his $238 million penthouse at 220 Central Park South announcing the levy, a moment that quickly went viral. Griffin has pushed back, threatening to pull business and jobs out of New York.
The tax was signed into law by Governor Kathy Hochul in late May, after passing the State Legislature as part of the 2026-2027 state budget, in coordination with Mamdani's effort to close the city's budget gap.
