Average annual compensation
(2) Average annual compensation(i) General rule. An employee's average annual compensation is the average of the employee's annual section 414(s) compensation determined over the averaging period in the employee's compensation history during which the average of the employee's annual section 414(s) compensation is the highest. For this purpose, an averaging period must consist of three or more consecutive 12-month periods, but need not be longer than the employee's period of employment. An employee's compensation history may begin at any time, but must be continuous, be no shorter than the averaging period, and end in the current plan year. (ii) Certain permitted modifications to average annual compensation(A) Use of plan year compensation. If the measurement period for determination of accrual rates is the current plan year, or the plan is an accumulation plan that satisfies paragraph (b) of this section, then plan year compensation may be substituted for average annual compensation. (B) Drop-out years. Any of the following types of 12-month periods in an employee's compensation history may be disregarded in determining the employee's average annual compensation (including for purposes of the requirement to average section 414(s) compensation over consecutive 12-month periods), but only if the plan disregards the employee's compensation for those periods in determining benefits