One of the three principal business reporting and measuring tools (along with the balance sheet and cashflow statement). The P&L is essentially a trading account for a period, usually a year, but also can be monthly and cumulative. It shows profit performance, which often has little to do with cash, stocks and assets (which must be viewed from a separate perspective using balance sheet and cashflow statement). The P&L typically shows sales revenues, cost of sales/cost of goods sold, generally a gross profit margin (sometimes called 'contribution'), fixed overheads and or operating expenses, and then a profit before tax figure (PBT). A fully detailed P&L can be highly complex, but only because of all the weird and wonderful policies and conventions that the company employs. Basically the P&L shows how well the company has performed in its trading activities.