Net income is the number that appears in headlines, but it is also the metric most easily shaped by accounting choices that, while entirely legal, can obscure the underlying health of a business. Free cash flow is harder to manufacture and, for that reason, tends to be the more reliable signal.

Net income includes non-cash items like depreciation, amortization, and stock-based compensation, along with one-time gains or charges that may have nothing to do with ongoing operations. Two companies can report identical net income while one is fully cash-generative and the other is quietly diluting shareholders through heavy equity compensation.

Free cash flow, calculated as operating cash flow minus capital expenditures, measures the cash actually left over after a business pays for the investments it needs to sustain itself. It is much harder to inflate because it is tied directly to cash movements rather than accrual-based estimates.

The gap between the two numbers is itself informative. A company with net income consistently higher than free cash flow over several years is often relying on non-cash add-backs or aggressive capitalization of expenses, a pattern worth investigating before trusting the earnings headline.

Capital-intensive industries complicate this comparison, since heavy reinvestment can suppress free cash flow even in a genuinely healthy business. The useful comparison is not free cash flow in isolation but the trend over multiple years relative to the company’s own reinvestment needs and its industry peers.

Evidence-first research, the kind that treats filed cash flow statements as more informative than the headline earnings number, such as BullScope’s Evidence Sheets, is built around exactly this principle: what a company actually collects in cash tends to be a more honest measure of its health than what it reports as profit.