What the statement of profit or loss is and why it matters
The P&L records revenue, costs and the profit (or loss) a business made over a trading period.
The statement of profit or loss (often shortened to P&L, and historically called the income statement or profit and loss account) is a financial statement that records a business's revenue and costs over a period of time — usually a financial year — and works down to the profit (or loss) the business made.
Crucially, it covers a period (e.g. "for the year ended 31 December"), unlike the statement of financial position, which is a snapshot at a single date.
Its purposes are to:
- measure performance — has the business become more or less profitable than last year?
- help managers make decisions — which costs are rising? Is the gross margin holding up?
- inform stakeholders — shareholders judge the return on their investment, lenders judge the firm's ability to repay, and the government assesses tax owed;
- support comparison — between years, against budget, and against rivals.
The statement is built in stages, peeling away one layer of cost at a time: from revenue to gross profit, then to profit from operations, then — after interest and tax — to the profit for the year, and finally to retained earnings.
- The P&L shows revenue, costs and profit over a period (usually a year).
- It measures performance and profitability over time.
- Used by managers, shareholders, lenders and the government.
- Built in stages: gross profit → operating profit → profit for the year → retained earnings.