Tax Law, § 260
Example:
Mr. Smith borrows $100,000 from Bank X, and gives the bank a mortgage on two commercially improved parcels. One of the parcels is located in Albany, New York and the other is located in Paterson New Jersey. The parcel located in Albany has a fair market value of $400,000, and has a prior existing mortgage lien totaling $33,000, which remains on the parcel after execution of the mortgage and which represents an amount owed to Bank Z. The parcel located in Paterson has a fair market value of $200,000, and has no prior existing mortgage liens. Therefore, the net value of the Albany parcel is $367,000 ($400,000 - $33,000) and the net value of both parcels is $567,000 ($367,000 + $200,000). The portion of the $100,000 debt secured by the mortgage subject to the taxes described in Part 642 of these regulations is computed as follows:
Net value of Albany parcel $367,000 × $100,000 = $64,727
Net value of both parcels 567,000
Accordingly, $64,700 ($64,727 rounded to the nearest $100) would be the amount used to compute the mortgage recording taxes.
N.Y. Comp. Codes R. & Regs. Tit. 20 § 649.1