The purpose of this paper is to establish a new insight into the poten
tial benefit of fringe benefits used by firms in compensation contract
s. We show that fringe benefits have a role to provide incentives and
reduce agency costs. Ln an agency model with moral hazard, we examine
the optimal incentive package that involves salary, equity shares, and
fringe benefits. Based on the notion that fringe benefits are imperfe
ct substitutes for salary and (weakly) complementary to effort, we sho
w how the optimal package may include an excessive provision of fringe
benefits that exceeds the first-best level, and why it involves a dis
tortion towards overconsumption of fringe benefits in terms of the man
ager's preferences.