Other reasonable methods
(B) Other reasonable methods. Notwithstanding paragraph (d)(3)(iv)(A) of this section, any other reasonable method is permitted to be used to determine the average percentages described in paragraph (d)(3)(i) of this section for either or both of the groups (i.e., highly compensated employees and nonhighly compensated employees), provided that the method cannot reasonably be expected to create a significant variance from the average percentage for that group determined using the individual-percentage method provided in paragraph (d)(3)(iv)(A) of this section. The same method is not required to be used for calculating the two average percentages. For example, to determine the average percentage for nonhighly compensated employees as a group, an employer may calculate an aggregate compensation percentage by dividing the aggregate amount of compensation of nonhighly compensated employees that are included under the alternative definition by the aggregate amount of total compensation of nonhighly compensated employees, provided the resulting percentage is not reasonably expected to vary significantly from the average percentage produced using the individual-percentage method provided in paragraph (d)(3)(iv)(A) of this section because of the extra weight given employees with higher compensation. (v) Facts and circumstances determination. The determination of whether the average percentage of total compensation included for the employer's highly compensated employees as a group for a determination period exceeds by more than a de minimis amount the average percentage of total compensation included for the employer's nonhighly compensated employees as a group is based on all the relevant facts and circumstances. The differences between the percentages for prior determination periods may be considered in determining whether the amount of the difference between the percentages is more than de minimis. In addition, an isolated instance of a more than de minimis difference between the compensation percentages that is due to an extraordinary unforeseeable event (such as overtime payments to employees of a public utility due to a major hurricane) will be disregarded if the amount of the difference in prior determination periods was de minimis. (vi) Special rules for definitions of compensation based on rate of compensation or that include prior-employer or imputed compensation(A) Special rule for determining compensation included under an alternative definition. If an alternative definition uses rate of compensation or includes prior-employer compensation or imputed compensation, the amount of each employee's compensation for a determination period that is treated as included under the alternative definition for purposes of determining the average percentages for the nondiscrimination requirement (i.e. the amount used in the numerator) must not be more than 100 percent of the employee's total compensation for that period, determined under paragraph (d)(3)(ii) and (d)(3)(vi)(B) of this section. This limit on the amount of compensation treated as included under the alternative definition applies even if the amount of compensation actually credited to the employee for the determination period under the definition and, thus, used as compensation within the meaning of section 414(s), exceeds the employee's total compensation for the period. (B) Special rule for determining total compensation. If an alternative definition uses rate of compensation or includes prior-employer compensation or imputed compensation, each employee's total compensation for purposes of determining the average percentages for the nondiscrimination requirement (i.e. the amount used in the denominator) must include all the types of elective contributions and deferred compensation described in paragraph (c)(4) of this section.