营运成本(营业成本, operating expense, OPEX) 指的是运行企业的持续性、消耗性的支出，与之对照的是资本支出(captial expenditure, CAPEX)。例如：购买复印机的支出属于资本支出(CAPEX)，而纸张、墨水、电力、维修的费用则属于营运成本(OPEX)。在企业中，营运成本可能包含了员工薪资、设备租金、场地租金。

营运成本包含了：

An operating expense, operating expenditure, operational expense, operational expenditure or OPEX is an ongoing cost for running a product, business, or system. Its counterpart, a capital expenditure (CAPEX), is the cost of developing or providing non-consumable parts for the product or system. For example, the purchase of a photocopier involves CAPEX, and the annual paper, toner, power and maintenance costs represents OPEX. For larger systems like businesses, OPEX may also include the cost of workers and facility expenses such as rent and utilities.