5-percent owner
(5) Penalties applicable to certain amounts received by 5-percent owners (A) This paragraph applies to amounts which are received from a qualified trust described in section 401(a) or under a plan described in section 403(a) at any time by an individual who is, or has been, a 5-percent owner, or by a successor of such an individual, but only to the extent such amounts are determined, under regulations prescribed by the Secretary, to exceed the benefits provided for such individual under the plan formula. (B) If a person receives an amount to which this paragraph applies, his tax under this chapter for the taxable year in which such amount is received shall be increased by an amount equal to 10 percent of the portion of the amount so received which is includible in his gross income for such taxable year. (C) For purposes of this paragraph, the term “5-percent owner” means any individual who, at any time during the 5 plan years preceding the plan year ending in the taxable year in which the amount is received, is a 5-percent owner (as defined in section 416(i)(1)(B) ).