Revenue expenditure and operating expenses (OpEx) are not exactly the same, but they are related. Revenue expenditure refers to the ongoing expenses required to maintain the day-to-day operations of a business, such as the cost of goods sold, wages and salaries, rent, and utilities.  Operating expenses (OpEx) are expenses that are incurred to support the day-to-day operations of a business, including both revenue and non-revenue expenditures. Therefore,   includes revenue expenditure as well as other expenses like selling and marketing expenses, research and development expenses, and general and administrative expenses.