Decreases in assets, or increases in liabilities, that result in decreases in equity, other than those relating to distributions to holders of equity claims, A key characteristic of an expense is that a resource is consumed: inventory disappears, labour is utilised, PPE is used, Examples include: cost of sales, wages, rent, depreciation, Net assets will decrease (assets (e.g. cash, inventory, PPE) will decrease or liabilities (e.g. payables, provisions) will increase)