The Long and Winding Road… of 401(k) plan compensation definitions
by Ben Gibbons
A plan’s definition of “compensation” tends to be one of the trickier aspects of 401(k) administration. Having been asked multiple times in the past 12-months whether deferrals to a nonqualified deferred compensation plan need to be deducted before determining eligible compensation for 401(k) deferrals (spoiler: they do), it seems a blog post on the subject is in order.
The vast majority of 401(k) plan documents define compensation by starting with one of the following base definitions: W-2 (Box 1) compensation; Section 3401(a) compensation; or Section 415 compensation (the specifics of these base definitions are beyond the scope of this post). Each definition has its nuances with respect to whether certain types of compensation should be either included or excluded from the base definition (e.g., fringe benefits or amounts realized from the exercise of stock options).
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