What Is CapEx? Capital Expenditures Explained

Capital expenditures — CapEx — represent the cash a company spends on long-lived assets: factories, equipment, technology infrastructure, office buildings, vehicles, and other physical or intangible assets with useful lives beyond one year. CapEx is one of the most important numbers on the cash flow statement because it directly determines free cash flow and connects to how capital-intensive a business is.

How CapEx Works

When a company buys a $50 million piece of equipment, that $50 million doesn't appear as an expense on the income statement. Instead, the equipment is recorded as an asset on the balance sheet, and its cost is gradually "expensed" through depreciation over its useful life. But the cash was spent upfront — and that cash outflow appears on the cash flow statement as a capital expenditure.

This disconnect between the income statement (depreciation spread over years) and the cash flow statement (full cost paid immediately) is why you can't judge a company's cash generation from earnings alone. A company investing heavily in new equipment reports high CapEx on the cash flow statement while the income statement only shows the depreciation piece — potentially a fraction of the actual cash spent.

Where to Find CapEx

CapEx appears in the "investing activities" section of the cash flow statement, typically labeled as "purchases of property, plant and equipment" or "capital expenditures." It's reported as a negative number (cash flowing out). Some companies also include software development costs or other intangible asset purchases in this line.

Important: don't confuse CapEx with acquisition spending. Acquisitions also appear in investing activities but are a separate line item — "acquisitions of businesses" or similar. For calculating free cash flow and owner earnings, only CapEx (maintenance of productive assets) should be subtracted, not acquisition spending (discretionary capital allocation).

Maintenance CapEx vs. Growth CapEx

Conceptually, CapEx has two components. Maintenance CapEx is the spending required to keep existing assets functioning — replacing worn-out equipment, upgrading aging technology, repairing facilities. Without maintenance CapEx, the business would physically deteriorate over time.

Growth CapEx is spending to expand capacity — building new factories, opening new locations, adding new production lines. Growth CapEx is optional and discretionary; the business could survive without it, though it wouldn't grow.

Unfortunately, companies almost never disclose the split between maintenance and growth CapEx. Most investors use total CapEx as a conservative proxy (which understates free cash flow for growing businesses) or estimate maintenance CapEx as roughly equal to depreciation (since depreciation approximates the cost of maintaining the existing asset base).

Why CapEx Matters for Investors

It Determines Free Cash Flow

Free cash flow equals operating cash flow minus CapEx. A company generating $10 billion in operating cash flow with $3 billion in CapEx produces $7 billion in free cash flow. The same company with $8 billion in CapEx produces only $2 billion. CapEx intensity directly determines how much cash is available for dividends, buybacks, and debt reduction.

It Reveals Capital Intensity

CapEx relative to revenue tells you how capital-intensive the business is. A software company spending 3% of revenue on CapEx is asset-light — almost all revenue flows through to cash. A semiconductor manufacturer spending 30% of revenue on CapEx is capital-heavy — a large portion of revenue must be reinvested just to maintain the business.

Capital-light businesses are generally preferred by quality investors because they convert more revenue into free cash flow, require less ongoing investment, and earn higher returns on invested capital. But capital-heavy businesses with strong competitive positions (like railroads or pipelines) can still be excellent investments — the high CapEx creates barriers to entry that protect the moat.

It Connects to Owner Earnings

In our owner earnings formula — net income plus depreciation and amortization minus CapEx — capital expenditures are the critical subtraction. Adding back depreciation (a non-cash charge) and subtracting CapEx (the actual cash cost of maintaining assets) reveals the true cash the business generates for owners. Without understanding CapEx, you can't calculate owner earnings or fair value. Be careful with capital-light narratives: some businesses appear capital-light only because they lease rather than own, or they've shifted spending into R&D that's expensed rather than capitalized. The cash still leaves the business.