As nouns the difference between excess and profit
is that
excess is the state of surpassing or going beyond limits; the being of a measure beyond sufficiency, necessity, or duty; that which exceeds what is usual or proper; immoderateness; superfluity; superabundance; extravagance; as, an excess of provisions or of light while
profit is profit.
As an adjective excess
is more than is normal, necessary or specified.