An income statement summarizes a company's revenue, costs and profit over an accounting period. It is a starting point for analysis, not a full account of the company's financial health.
Revenue comes first
Revenue describes sales recognized under accounting rules. It is not necessarily cash collected during the same period, and high revenue does not guarantee profitability.
Follow the cost structure
Subtract direct costs to arrive at gross profit. Other operating expenses, such as research, payroll and marketing, help explain operating profit or loss. The precise layout varies by industry and accounting framework.
Net income is not cash flow
Financing costs, taxes, one-time items and noncash accounting charges can affect net income. A company can report an accounting profit while facing liquidity pressure, so consider the balance sheet and cash-flow statement as well.
A simplified example
Suppose a business records $100 in revenue, $60 in direct costs and $25 in operating expenses. Its illustrative gross profit is $40, and its operating profit before other items is $15. This arithmetic is only an educational example, not data for a real company.
Read the notes
Accounting policies, segment results, exceptional items and period comparisons can change the interpretation. Favor audited or regulatory filings where available, and never confuse estimated financial figures with filed results.