Definition (canonical)
A profit and loss statement (P&L, income statement) is the financial report showing a company's revenues, costs and resulting profit over a period. It answers one question: did the business earn or lose money in this quarter or year — and where exactly along the way.
The structure, top to bottom
A P&L is a waterfall. It starts with revenue at the top, then subtracts costs in layers, each producing a subtotal:
| Line | What happens |
|---|---|
| Revenue | all sales for the period |
| − Cost of goods sold | direct costs of what was sold |
| = Gross profit | product-level profitability |
| − Operating expenses | salaries, rent, marketing, admin |
| = Operating profit | the business engine's result |
| − Interest, taxes, one-offs | financing and fiscal layer |
| = Net profit | the bottom line |
Reading it top-down tells you where money leaks: strong gross but weak operating profit points at overheads; strong operating but weak net points at debt costs.
How to read a P&L in five minutes
Compare, never read in isolation: this period vs previous periods (trend beats level) and each cost line as a percentage of revenue (structure beats amounts). Three high-signal checks: is revenue growth matched by profit growth; which cost line grows faster than revenue (that is your leak); do one-off items flatter the result. For cross-company comparisons, analysts also compute EBITDA from P&L lines.
What the P&L will not tell you
It says nothing about cash timing — booked revenue may be unpaid invoices, so pair it with the cash flow statement — and nothing about what the company owns and owes, which lives in the balance sheet. The three reports together form the complete picture; the P&L alone is one lens.
FAQ
P&L vs income statement — any difference? None; two names for the same report. IFRS formally says "statement of profit or loss."
How often is it prepared? Statutorily annually; well-run companies review a monthly management P&L.
Which single line matters most? Operating profit — it shows whether the core engine works, before financing noise and one-offs.
Why do fast-growing companies show ugly P&Ls? Growth spending — hiring ahead of revenue, marketing, market entry — hits costs today while revenue arrives tomorrow. The statement punishes investment in the short run, which is why context and multi-period reading matter more than any single year.
Related: Revenue · Profit · EBITDA · Balance Sheet · Cash Flow Reviewed: 2026-07-15 · Sources: IAS 1