The Mansion Tax Is Not Just For Mansions Anymore On Long Island
If you are buying a home anywhere in Nassau or Suffolk for one million dollars or more, budget for a tax with a name that undersells how common it has become.
The New York mansion tax was built for a different market. It was enacted in 1989 as a flat one percent tax on residential sales of one million dollars or more, and at the time that threshold only touched the very top of the market. Today a lot of ordinary Long Island sales cross that line without anyone involved owning anything close to a mansion.
Who actually pays it
The rule is simple and it does not bend easily. The mansion tax is statutorily the buyer's responsibility, paid at closing, and it cannot be waived. On a home selling for one point two million dollars, that works out to twelve thousand dollars due from the buyer at the closing table, separate from the down payment, attorney fees, and every other line item on the closing statement.
Who feels that cost economically is a different question. The question of who actually bears the expense often comes down to contract negotiation, with buyers sometimes asking for seller credits to offset it when the market allows, and simply absorbing it when the market does not.
Nassau and Suffolk work differently than the city
Here is the part that trips people up when they read general New York closing cost guides. Inside New York City the mansion tax is progressive, rising in steps as the price climbs. Outside the five boroughs, including all of Nassau County, the mansion tax stays a flat one percent on any residential sale of one million dollars or more, with no progressive tiers at all. A five million dollar home in Manhasset and a one million dollar home in the same town both pay the same one percent rate under this structure.
The only part of Long Island that lives under the city's progressive brackets is the stretch of northeastern Queens, where a five million dollar sale produces fifty thousand dollars in mansion tax under the progressive scale that applies there. Nassau and Suffolk buyers do not face that scaling. One percent is the number, whether the house sells for one million or ten.
The threshold has not moved with prices
The one million dollar line was set in 1989 and has stayed put since. Adjusted for inflation, that threshold today would land somewhere around two and a half to two and seven tenths million dollars. Instead it still sits at one million, which is why a well kept colonial in a lot of Nassau towns can trigger a tax that was written with much larger transactions in mind.
The tax applies broadly too. It covers single family homes, condos, and townhouses alike, anywhere the sale price reaches that one million dollar mark, with no carve out for ordinary family homes versus true luxury estates.
If you are out on the East End, there is a second transfer cost layered on top that buyers in the rest of Nassau and Suffolk do not see. All towns in the Peconic Bay region except Riverhead charge a separate transfer tax of two and a half percent, covering Southampton, Southold, East Hampton, and Shelter Island, on top of the state transfer tax and the mansion tax where it applies. That rate increased from two percent in 2023 specifically to fund a community housing program in those towns. Buyers out there are generally the ones who pay it, separate from the mansion tax entirely.
If you are mapping out what a purchase near the million dollar mark will actually cost you at closing, it helps to run the real numbers before you are sitting at the table. Send a question over at /askmuds or check what your current home might be worth at /my-home-value/.