Net income

Net income is the profit remaining after every cost, charge, and obligation has been deducted from revenue: operating costs, depreciation, interest, other non-operating items, and taxes. It's the final and most complete measure of profitability on the income statement, and the origin of the term bottom line. The formula is:

It represents what the company earned on behalf of its shareholders during the period, and forms the basis for earnings per share, dividend decisions, and the retained earnings that flow to the balance sheet.

Despite being the most cited profitability figure in financial reporting, net income is also the most susceptible to distortion. It's the cumulative result of every accounting policy choice, non-cash charge, one-time item, and tax structure decision made above it, so two companies with identical operating performance can report very different net income figures depending on their capital structure, acquisition history, depreciation method, and tax jurisdiction. This is precisely why professional analysts rarely stop at net income and instead work back up the income statement to operating income, EBITDA, or gross profit depending on what they're trying to isolate.

Net income is also sensitive to non-recurring items, like asset sale gains, impairment charges, restructuring costs, and legal settlements, which can make a single period's result highly unrepresentative of ongoing earning power. This is why adjusted or normalised net income, stripping out these one-off items, is often presented alongside the reported figure.

For equity investors, net income ultimately matters because it's the pool from which returns are generated, through dividends paid out or retained earnings reinvested to compound value. But reaching for it without understanding what drove it is one of the most common mistakes in financial analysis.