As of March 2015, the sales tax rate for Nassau Country in New York State is 8.625 percent, according to the New York Department of Tax and Finance. Included is the 4 percent state-level tax charged in all New York counties and a 0.375 percent tax that funds the MCTD.
The Metropolitan Commuter Transportation District surcharge is an added tax applied in Dutchess, Orange, Putnam, Rockland, Suffolk and Westchester counties, as well as New York City, according to the New York Department of Tax and Finance. The surcharge funds public transit operated by the Metropolitan Transportation Authority. The Nassau Country sales tax compares against a rate of 8.875 percent in New York City, 7 percent in St. Lawrence and 8 percent in Albany.