Operating Cash Flow and net income both claim to measure business profitability — but they tell very different stories. Understanding both is essential for interpreting financial statements accurately.
What net income measures
Net income (also called profit or earnings) is revenue minus all costs, as recorded on the income statement. It follows accrual accounting: revenue is recognized when earned, and expenses are matched to the period they relate to.
This means a business can have high net income while receiving no cash. A company that sells $1M on credit but collects nothing will show $1M net income and $0 cash.
What OCF measures
Operating Cash Flow adjusts net income for:
-
Non-cash charges (depreciation, amortization, stock compensation): added back because they reduce net income but don't use cash
-
Working capital changes: accounts receivable, inventory, and payables timing differences between revenue recognition and cash collection/payment
OCF = Net Income + Non-cash Charges + Working Capital Changes
Why they diverge
Case 1: Company A — fast growth, large receivables Net income: $500k. Customers owe $600k (not yet collected). OCF: negative. Interpretation: the business is profitable but burning cash to fund growth.
Case 2: Company B — mature, asset-heavy business Net income: $200k. Depreciation on equipment: $300k. OCF: $500k. Interpretation: true cash generation is much higher than the P&L shows.
The reliability of OCF
Sophisticated investors prefer OCF and free cash flow over net income because: - Revenue recognition can be manipulated (pull forward, defer) - Depreciation schedules are management choices - OCF requires actual cash to arrive in the bank
A business with consistently high net income but low OCF deserves scrutiny.
Use the Operating Cash Flow Calculator to convert your income statement figures into OCF and see the gap.