The Suffolk County Transfer Tax: What a Seller Actually Pays at Closing
If you are selling a house in Suffolk County this year, here is the one tax you need to budget for and who writes the check.
New York State charges a real estate transfer tax of two dollars for every five hundred dollars of your sale price, which works out to 0.4 percent. The seller is generally the one who pays this tax, not the buyer. Suffolk County itself does not add a separate county transfer tax on top of the state charge.
What this looks like in dollars
Take the Suffolk County single family median sale price of $740,000 in September 2026, reported by OneKey MLS. At 0.4 percent, the state transfer tax on that sale comes to $2,960. This is a hypothetical example built only to show the math, not a quote for any specific property, since your actual price will differ.
The formula itself comes straight from the state. Transfer tax is computed at two dollars for each five hundred dollars, or any fractional part, of consideration. So a sale price that lands between increments of $500 still rounds up to the next full increment for tax purposes.
When the mansion tax enters the picture
If your home is selling for $1 million or more, a second tax shows up, and this one is not on the seller. New York's so called mansion tax is an additional 1 percent of the sale price on residential property at or above $1 million, and the buyer is responsible for paying it. For most Suffolk sellers below that threshold, this tax simply will not apply, but it is worth knowing if your home is priced near the line or if you are buying your next place at the same time.
There are a handful of situations where the transfer tax does not apply at all. Some transfers involving an agent, a straw party, or a change in the form of ownership without a change in beneficial ownership are exempt, and so are certain transfers carried out under a will, though a deed an executor signs as part of an actual sale is still taxable. These are narrow exceptions. Most straightforward home sales will owe the full tax.
One thing Smithtown and other Suffolk sellers should not confuse
Suffolk's standard transfer tax is different from the Peconic Bay Region Community Preservation Fund, a separate tax that applies only in the five East End towns of East Hampton, Shelter Island, Southampton, Riverhead, and Southold. If your property sits in Smithtown, Huntington, Brookhaven, or most of the rest of the county, that East End fund does not touch your closing. Do not let a flyer or an old article about Hamptons closings make you think you owe a tax you do not.
The transfer tax is usually a small line item next to bigger ones like your attorney fee, your existing mortgage payoff, and your agent commission. Still, it is real money that comes off your proceeds at the closing table, and it is worth seeing written down before you accept an offer rather than reading about it for the first time on a closing statement.
If you want to see all of your likely costs lined up in one place before you list, run your numbers through the net sheet and see what actually lands in your pocket. And if you are just starting to wonder what your Suffolk home might sell for this fall, check your home value at /my-home-value/ or send me a question any time at /askmuds.