base contribution percentage
(2) Defined contribution plan (A) In general A defined contribution plan meets the requirements of this paragraph if the excess contribution percentage does not exceed the base contribution percentage by more than the lesser of— (i) the base contribution percentage, or (ii) the greater of— (I) 5.7 percentage points, or (II) the percentage equal to the portion of the rate of tax under section 3111(a) (in effect as of the beginning of the year) which is attributable to old-age insurance. (B) Contribution percentages For purposes of this paragraph— (i) Excess contribution percentage The term “excess contribution percentage” means the percentage of compensation which is contributed by the employer under the plan with respect to that portion of each participant’s compensation in excess of the integration level. (ii) Base contribution percentage The term “base contribution percentage” means the percentage of compensation contributed by the employer under the plan with respect to that portion of each participant’s compensation not in excess of the integration level.