An income statement (also called a profit and loss statement or P&L) reports a company’s revenues, expenses, and resulting profit or loss over a defined period (a quarter, a year). It shows whether the business operated profitably during that period.
Standard structure runs top-down from revenue to net income:
| Line | What it is |
|---|---|
| Net sales / revenue | Money in from selling products or services (after returns and discounts). |
| Cost of sales (COGS) | Direct cost of producing or acquiring the things sold. |
| Gross profit | Revenue − COGS. The money left after covering direct production. |
| Operating expenses (SG&A) | Selling, general, and administrative — the overhead. |
| Depreciation | The current period’s depreciation expense (Depreciation). |
| Operating income | Gross profit − operating expenses − depreciation. Profit from operating the business. |
| Other income (expense), net | Interest income, interest expense, investment gains/losses. |
| Income before income taxes | Pre-tax bottom line of the business. |
| Income tax expense | What’s owed to the government on that income. |
| Net income | The final bottom line, what the company gets to keep. |
| Earnings per share (EPS) | Net income divided by share count, for public companies. |
The bolded lines are the sub-totals: gross profit, operating income, pre-tax income, net income. Each slices the business by which costs are subtracted at that level.
Gross profit margin (gross profit / revenue) measures production efficiency: how much of each revenue dollar survives after producing what was sold. Operating margin (operating income / revenue) measures overall operational efficiency. Net profit margin (net income / revenue) measures bottom-line profitability.
The income statement covers a period (e.g., “for the year ended December 31, 2024”), not a point in time. It’s a flow statement. The complementary stock statement, what the company owns and owes at a single instant, is the Balance sheet. The Statement of cash flows reconciles the accrual-accounting income here with the cash that actually moved.