Operating Cash Flow Calculator
Calculate operating cash flow (OCF) — the cash generated by a company's core business operations. OCF adjusts net income for non-cash items and working capital changes to show the actual cash the business produces from its day-to-day activities.
What Is Operating Cash Flow?
Operating cash flow (OCF) is the cash generated from a company's core business activities — selling products and services, collecting from customers, and paying suppliers and employees. It is the most important of the three cash flow categories because it is the most sustainable source of cash.
OCF starts with net income and adjusts for non-cash items (like depreciation) and changes in working capital (receivables, inventory, payables). This is because net income includes accounting entries that do not correspond to actual cash movements. OCF strips those out to show the real cash generated.
Operating Cash Flow Formula
OCF = Net Income + Non-Cash Charges − Increase in Working Capital
Expanded:
OCF = Net Income + Depreciation + Amortization + Other Non-Cash Charges ± Change in Working Capital
- Depreciation & amortization — non-cash expenses, added back
- Working capital change — increase in receivables/inventory uses cash (subtract); increase in payables frees cash (add)
- Net income — the accounting profit starting point
Worked Example
A business has net income = $75,000, D&A = $30,000, and working capital increased by $10,000:
OCF = $75,000 + $30,000 − $10,000 = $95,000
OCF / Net Income = $95,000 ÷ $75,000 = 126.67%
Interpretation: OCF exceeds net income because depreciation is a non-cash charge that reduced reported profit. The working capital increase (mostly from higher receivables or inventory) consumed $10,000 of cash. The net result is $95,000 of actual cash generated from operations. The OCF/NI ratio of 1.27 shows earnings are backed by cash — strong quality.
How to Interpret OCF
- OCF > Net Income (quality > 100%) — strong. Earnings are backed by real cash. Typical when D&A is large or working capital is being freed.
- OCF ≈ Net Income (quality ≈ 100%) — normal. Earnings translate to cash roughly one-for-one.
- OCF < Net Income (quality < 100%) — earnings are not backed by cash. Common in fast-growing businesses (working capital tied up) but a warning sign if sustained.
- OCF negative — the business is consuming cash from operations. Serious red flag unless temporary during rapid expansion.
- OCF consistently positive — the business is cash-generative. This is what makes a business financially strong.
Frequently Asked Questions
What is a good operating cash flow?
Positive OCF is good — the business generates cash from operations. Higher is better, but the key is that OCF consistently covers capital expenditures (producing positive free cash flow). An OCF/NI ratio above 1.0 (100%) is a sign of high earnings quality. A ratio below 1.0 sustained is a warning sign that profit is not converting to cash.
Why add back depreciation and amortization?
Depreciation and amortization are non-cash expenses. They reduce accounting profit but no cash leaves the business in the current period — the cash was spent years ago when the asset was purchased. Adding them back converts accounting profit to cash profit. This is why OCF is often higher than net income for capital-intensive businesses.
Why does an increase in working capital reduce OCF?
Because working capital represents cash tied up in the business. If receivables increase, you have sold on credit but not collected cash yet — the revenue is in net income but the cash is not in the bank. If inventory increases, you have paid for goods that have not been sold. Both consume cash, so they are subtracted from OCF. Conversely, reducing receivables or inventory frees cash and increases OCF.
What is the difference between OCF and EBITDA?
EBITDA is an accounting measure of operating profit before interest, taxes, and non-cash charges. OCF is the actual cash generated from operations. OCF = EBITDA − interest paid − taxes paid − change in working capital − other non-cash adjustments. OCF is lower than EBITDA because it includes cash taxes, cash interest, and working capital changes — all of which are real cash items.
Can operating cash flow be negative?
Yes. Negative OCF means the business is consuming cash from operations. This is common for fast-growing businesses (working capital tied up in receivables and inventory) but is a red flag if sustained. A business with persistent negative OCF will eventually run out of cash — it must be funded by financing or asset sales. Only temporary negative OCF during high growth is acceptable.
What is the difference between OCF and free cash flow?
OCF is the cash generated from core operations. Free cash flow (FCF) = OCF − capital expenditures. FCF is the cash available after maintaining the asset base — the cash actually free for debt repayment, dividends, buybacks, or reinvestment. FCF is the metric investors care about most for valuation. OCF measures operational health; FCF measures what the business can actually return to capital providers.