边际利润（英语：Marginal profit），在会计学上是指销售收入扣除变动成本的差额。从微观经济学的角度，边际利润则为边际成本和边际收益的差额。

In microeconomics, marginal profit is the difference between the marginal revenue and the marginal cost of producing one additional unit of output. Under the marginal approach to profit maximization, to maximize profits, a firm should continue to produce a good or service up to the point where marginal profit is zero.