Capital expenditure (Capex) and operational expenditure (Opex) both refer to money being paid out of your company. However, this happens in completely different ways. Capex relates to expenses your business incurs now in order to generate profit in the future – for example, investing in a new building, computers or vehicles to transport goods. Opex refers to the cost of the day-to-day running of your business – wages, utilities, rent, along with general and administrative expenses.