Every business must closely monitor its overhead costs. Because these aren’t directly linked to revenues, they can significantly drain a business if not monitored or controlled. Let's say start-up rents office space in a business location to carry out operations that could also be done from home until it reaches a certain growth stage. This rental cost comes with staff and equipment costs too. The company must therefore reconsider the money spent on rentals and whether it can be invested in revenue-driving areas like marketing or advertising.