What is capex? The money a company spends to buy, maintain or improve its fixed assets, such as buildings and equipment. This word is commonly capitalized like an acronym, but it is now a word in its own right. Capital expenditures contrast with operating expenses (opex), which are ongoing expenses that are inherent to the operation of the asset. Opex includes items like electricity or cleaning. The difference between opex and capex may not be immediately obvious for some expenses; for instance, repaving the parking lot may be thought of inherent to the operation of a shopping mall. The dividing line for items like these is that the expense is considered capex if the financial benefit of the expenditure extends beyond the current fiscal year. Download our White Paper on how with a Virtualized RAN Deployment, Mobile Operators Can See 49% Savings in capex and 31% Annual Savings in opex.