What is Operating Cash Flow (OCF)?
Operating Cash Flow (OCF) measures the net cash generated from the core operations of a company within a specified time period.
 What does operating cash flow (OCF) measure?
 What is the operating cash flow (OCF) formula?
 How does the direct method of calculating operating cash flow (OCF) differ from the indirect method?
 How is operating cash flow (OCF) different from free cash flow (FCF)?
Table of Contents
How to Calculate Operating Cash Flow (OCF)
OCF, short for “operating cash flow,” refers to the net amount of cash brought in by a company’s daytoday operations.
The income statement is reported per accounting standards established by U.S. GAAP, which does not typically reflect a company’s actual liquidity (i.e. cash on hand).
Hence, the cash flow statement (CFS) is necessary to understand the real cash inflows / (outflows) from operating, investing, and financing activities.
The CFS starts with the “Cash Flow from Operating Activities” section, which calculates a company’s operating cash flow (OCF) in a specified period of time.
 Positive OCF → SelfSufficient Cash Flow from Operations
 Negative OCF → Insufficient Cash Flow from Operations
In a scenario with positive OCF, the company’s operations generate adequate cash to meet its reinvestment needs, e.g. working capital and capital expenditures (CapEx).
But in the latter case with negative OCF, the company must seek external financing sources to meet its reinvestment spending needs, e.g. via equity and debt issuances.
The cash flow statement (CFS) can be presented under two methods — the indirect or the direct method:
 Indirect Method: The beginning line item is net income, which is adjusted for noncash items (e.g. D&A) and changes in working capital to arrive at cash flow from operations.
 Direct Method – Instead of starting with net income, the direct method utilizes cash accounting to track the cash received from customers and paid out to third parties (e.g. suppliers, vendors).
Operating Cash Flow (OCF) Formula — Indirect Method
Under the indirect method — the more common approach in the U.S. — the CFS’s topline item is the accrualbased net income.
 The starting line item, net income (the “bottom line”), is first adjusted by adding back noncash expenses (e.g. such D&A, stockbased compensation).
 Then, other adjustments are made for the changes in working capital.
 The CFO section converts the accrualbased net income metric by adjusting it for noncash items (e.g. depreciation, amortization) and changes in net working capital (NWC).
 Once those adjustments have been made, the resulting line item is the “Cash Flow from Operating Activities”, i.e. the the operating cash flow (OCF).
If we consolidate all the steps up to this point, we come up with the following formula:
OCF Formula — Indirect Method
 Operating Cash Flow (OCF) = Net Income + Depreciation & Amortization – Increase in NWC
If OCF deviates substantially from net income, it implies further analysis is necessary to understand the underlying factors that are causing the difference.
The relationship between changes in working capital items and their respective cash flow impacts are as follows:
 Increase in Working Capital Asset → Cash Outflow (”Use”)
 Decrease in Working Capital Asset → Cash Inflow (”Source”)
 Increase in Working Capital Liability → Cash Inflow (”Source”)
 Decrease in Working Capital Liability → Cash Outflow (”Use”)
Working Capital Assets  Working Capital Liabilities 



For instance, if OCF is much lower than net income due to rising accounts receivable (A/R) — i.e. the sales in which customers paid on credit rather than cash — the company might have to reconsider how it collects cash payments from customers.
Operating Cash Flow (OCF) Formula — Direct Method
The less prevalent approach to calculate OCF is the direct method, which utilizes cash accounting to track the movement of cash during a specified period.
Compared to the indirect method, the direct method is simpler, as the formula consists of subtracting cash operating expenses from cash revenue.
OCF Formula — Direct Method
Operating Cash Flow (OCF) = Cash Revenue – Operating Expenses Paid in Cash
To emphasis, only cash revenue and cash operating expenses are included under the direct method.
Operating Cash Flow (OCF) vs Free Cash Flow (FCF)
OCF differs from FCF because the calculation of FCF includes CapEx, unlike OCF.
Operating cash flow (OCF) and free cash flow (FCF) are both metrics used to assess the financial stability of a company, typically to determine if the cash generated is enough to meet its spending needs.
While there are several variations of calculating free cash flow (FCF) — namely, free cash flow to firm (FCFF) and free cash flow to equity (FCFE) — the simplest formula subtracts capital expenditures (CapEx) from cash from operations (CFO).
Free Cash Flow (FCF) Formula
 Free Cash Flow (FCF) = Cash from Operations (CFO) – CapEx
The distinction between FCF and CFO is that FCF also deducts CapEx, as its a major cash outflow that is a core part of a company’s ability to produce cash flows.
For either metric, the higher the amount, the better off the company is (and vice versa), but FCF goes an extra step by considering CapEx.
Operating Cash Flow (OCF) Excel Calculator
We’ll now move to a modeling exercise, which you can access by filling out the form below.
OCF Example Calculation
Suppose that a company has the following financials:
 Net Income = $40 million
 Depreciation & Amortization = $10 million
 Increase in Net Working Capital (NWC) = –$5 million
Our starting point is net income, which is pulled from the income statement.
The D&A amount is a noncash add back (i.e. the real cash outflow, CapEx, already occurred in the initial period of purchase), so it has a positive impact on cash flow.
An increase in NWC reflects that there is more cash tied up in operations, thereby the cash flow decreases.
If we enter those assumptions into the OCF formula under the indirect method, we arrive at $45 million as our illustrative company’s OCF.
 Operating Cash Flow (OCF) = $40 million + $10 million – $5 million
 OCF = $45 million
In the next part of our modeling exercise, we’ll calculate OCF using the direct method.
Here, we’ll use the following assumptions:
 Cash Receipts = $80 million
 Cash Payments to Suppliers = –$25 million
 Employee Wages = –$10 million
Cash receipts refer to the cash payments received from customers, and the two cash operating expenses (i.e. cash reductions) consist of the following:
 Supplier Payments
 Employee Wages
Upon entering the assumptions into our OCF formula under the direct method, our company’s OCF is $45 million.
 Operating Cash Flow (OCF) = $80 million – $25 million – $10 million
 OCF = $45 million