26 U.S.C. § 4977: Tax on certain fringe benefits provided by an employer

In the case of an employer to whom an election under this section applies for any calendar year, there is hereby imposed a tax for such calendar year equal to 30 percent of the excess fringe benefits. the aggregate value of the fringe benefits provided by the employer during the calendar year which were not includible in gross income under paragraphs (1) and (2) of section 132(a), over which was paid by the employer during such calendar year to employees, and was includible in gross income for purposes of chapter 1. an election under this section is in effect with respect to an employer for any calendar year, and at all times on or after January 1, 1984 , and before the close of the calendar year involved, substantially all of the employees of the employer were entitled to employee discounts on goods or services provided by the employer in 1 line of business, An election under this section shall apply to the calendar year for which made and all subsequent calendar years unless revoked by the employer. All employees treated as employed by a single employer under subsection (b), (c), or (m) of section 414 shall be treated as employed by a single employer for purposes of this section. Except as otherwise provided in regulations, this section shall apply only with respect to employment within the United States.