Windfall Profit Law and Legal Definition Windfall Profit is a profit that occurs suddenly as a result of an event not controlled by the company or person realizing the gain from the event. They can occur due to unforeseen circumstances in a product's market, such as unexpected demand or government regulation.

Windfall means such amount in respect of any income, profits, gains or turnover relating to a period ending on or before the Effective Time as was neither actually received before the Effective Time nor reflected in the Working Capital Statement but which, had it been actually received before the Effective Time or reflected in the Working Capital Statement, would have resulted in an increase in the Purchase Price.