prior or subsequent sales of the property during the real property tax year shall be disregarded.
Example. In County X the real property tax becomes a lien on property and is assessed on November 30 for the current calendar year, which is also the real property tax year. There is no personal liability for the real property tax imposed by County X. A owns, on January 1, 1955, real property in County X. A uses an accrual method of accounting and has not made any election under section 461(c) to accrue ratably real property taxes. A sells real property on June 30, 1955. By reason of A's method of accounting, he could not deduct any part of the real property tax for 1955 on the real property since he sold the real property prior to November 30, 1955, the accrual date. Under section 164(d)(1), 180/365 (January 1-June 29, 1955) of the real property tax for the 1955 real property tax year is treated as imposed on A, and under section 164(d)(2)(D) that portion is treated as having accrued on June 30, 1955, and may be deducted by A for his taxable year in which such date falls. B, the purchaser from A, who uses an accrual method of accounting, has likewise not made an election under section 461(c) to accrue real property taxes ratably. Under section 164(d)(1), 185/365 of the real property taxes may be accrued by B on November 30, 1955, and deducted for his taxable year in which such date falls.
26 C.F.R. §1.164-6