Tax Law, § 1405-A
Example:
A, the owner of real property, leased the property to B for $400,000 consideration, which was to be paid to A over the term of the lease. Under the terms of the lease, B was provided an option to purchase the property. A paid a real estate transfer tax of $1600 based upon the $400,000 consideration. Several years later, before the expiration of the lease, B exercised the option and purchased the property from A. Up to the date of the sale, A had received $300,000 of the total $400,000 consideration. As a result of the sale, A was not entitled to receive the remaining $100,000 of consideration. A is entitled to a credit against the transfer tax due on the sale of the property computed as follows: $100,000 ÷ $400,000 × $1600 = $400 credit
N.Y. Comp. Codes R. & Regs. Tit. 20 § 575.13