How to calculate free cash flow from a 10-K

By William March · Finterm

Free cash flow isn't a line item in SEC filings. Here's the formula, where to find the inputs in the cash flow statement, and the adjustments to watch for.

Free cash flow is one of the most cited numbers in valuation, and it appears nowhere in a company's SEC filings as a line item. You compute it yourself from two figures that are both in the cash flow statement of any 10-K or 10-Q.

The formula

Free cash flow = cash flow from operations minus capital expenditure (FCF = CFO − CapEx). It's the cash a business generates after spending what it needs to maintain and grow its asset base — the cash actually available to pay down debt, buy back stock or sit on.

Where to find the inputs

• CFO — 'Net cash provided by operating activities', the subtotal at the bottom of the operating-activities section of the cash flow statement.
• CapEx — usually 'Purchases of property, plant and equipment' (and sometimes capitalised software) in the investing-activities section. It's reported as a negative number, so you subtract its absolute value.

Pulling it automatically

Rather than dig the two figures out of every filing by hand, you can read them straight from the companyfacts data. Finterm is a free SEC EDGAR viewer that computes FCF = CFO − CapEx on the wire from a company's own reported us-gaap numbers, per quarter, with no proprietary 'adjusted' figures in between.

Stock-based compensation: in or out?

SBC is a non-cash charge that gets added back to net income to arrive at CFO in the indirect-method cash flow statement. That means CFO — and therefore FCF — is higher for companies that pay employees heavily in stock. Some analysts strip SBC back out before computing FCF, treating it as a real economic cost even if no cash changed hands that quarter. Others leave it in. Neither is wrong, but if you're comparing two companies and one pays 15% of revenue in SBC while the other pays 2%, the FCF numbers aren't comparable unless you apply the same treatment to both.

What negative FCF means

A negative FCF quarter doesn't automatically mean trouble. Early-stage businesses and capital-heavy expansions routinely generate negative FCF because investment is running ahead of revenue. The relevant questions are whether CFO is positive (the core business generates cash even if total FCF is negative) and whether the trajectory is improving as the investment matures. A mature business with persistently negative FCF when peers run at 20%+ margins is a different situation from a company that turned negative for one quarter due to a planned data centre buildout.