It is always priced as a percentage of the mortgage amount but varies, depending on the county where the property is located. For example, a mortgage placed on a home in Nassau county would trigger a tax of 0.8% of the mortgaThis is a fee paid by the borrower to the State and local government for the privilege of having a mortgage. A Closing Day Surprise New York State has the highest closing costs in the Nation. One of the main reasons for this is the New York State Mortgage Recording Tax. Get the best mortgage rate by obtaining all cost information