Expenses Business is the process of tracking and managing money that is spent in the day-to-day operations of a company. Expenses represent costs associated with running a business and refer to anything from personnel salaries to facility rental costs and equipment purchases. Accurately tracking expenses helps a business stay on top of its budget, allocate resources in the most effective manner, and identify areas where cutbacks can be made. Tracking expenses also helps businesses track their income against anticipated costs, and make informed financial decisions for the long term.