Tax Law, § 266
In cases where New York State recovers a judgment for the taxes described in Part 642 of this Title, interest at the rate of one per centum per month, based upon the amount of such taxes awarded by the court, is due. The interest shall be computed from the date on which the taxes awarded became due and payable.
N.Y. Comp. Codes R. & Regs. Tit. 20 § 653.5