CapEx (Capital Expenditures): Definition, Formula & Examples
Why CapEx Matters
Capex is one of the most important numbers in any company’s financials. It tells you how much a business is investing in its future productive capacity — building new factories, buying equipment, upgrading IT infrastructure, or expanding facilities. A company that consistently underinvests relative to its depreciation is effectively shrinking. One that spends aggressively on capex is betting on growth.
For investors, capex is also the bridge between net income and free cash flow. A company can report strong earnings while burning cash if capex is high — which is why you can’t evaluate a business on earnings alone.
The CapEx Formula
You won’t always find a clean “capex” line on the income statement — because capex isn’t an income statement item. It appears on the cash flow statement under investing activities, typically labeled “Purchases of property, plant, and equipment.” The formula above is how you back into it from balance sheet data if needed.
Types of Capital Expenditures
| Type | Purpose | Examples |
|---|---|---|
| Growth CapEx | Expand productive capacity or enter new markets | New factory, additional fleet vehicles, new retail locations |
| Maintenance CapEx | Sustain existing operations at current levels | Equipment replacements, roof repairs, server upgrades |
This distinction matters enormously for valuation. Maintenance capex is essentially mandatory — the company has to spend it just to keep running. Growth capex is discretionary spending aimed at generating additional future revenue. When calculating a company’s true cash-generating ability, some analysts subtract only maintenance capex from operating cash flow.
CapEx vs. Operating Expenses (OpEx)
The key distinction: capex creates or improves a long-term asset and is capitalized (recorded on the balance sheet, then depreciated). Operating expenses are consumed in the current period and hit the income statement immediately.
| Feature | CapEx | OpEx |
|---|---|---|
| Accounting treatment | Capitalized on balance sheet, then depreciated | Expensed immediately on income statement |
| Income statement impact | Gradual (via depreciation over useful life) | Immediate (full amount in current period) |
| Cash flow impact | Full cash outflow at purchase (investing activities) | Full cash outflow in period incurred (operating activities) |
| Examples | New machinery, building, vehicle fleet | Salaries, rent, utilities, marketing |
| Benefit period | Multiple years | Current period only |
CapEx and Free Cash Flow
Free cash flow (FCF) — the cash left over after a company funds its operations and capital investments — is calculated directly from capex:
This is why capex-heavy industries (utilities, telecom, energy) often show lower free cash flow relative to earnings. The cash is real — it’s just being reinvested into the business. Whether that investment generates adequate returns is the key question for investors.
CapEx by Industry
Capital intensity varies dramatically across sectors. Here’s a general sense of where industries fall:
| Capital Intensity | Industries | Typical CapEx / Revenue |
|---|---|---|
| Very High | Oil & gas, utilities, telecom, semiconductors | 15–30%+ |
| High | Airlines, manufacturing, mining, real estate | 8–15% |
| Moderate | Retail, healthcare, transportation | 3–8% |
| Low | Software, financial services, consulting, media | 1–3% |
Asset-light businesses (SaaS companies, for example) convert a much higher share of earnings into free cash flow because they don’t need to reinvest heavily in physical assets. This is a big reason software companies command higher valuation multiples.
Where to Find CapEx in Financial Statements
Look at the cash flow statement under “Cash flows from investing activities.” The line is usually labeled “Purchases of property, plant, and equipment” or “Capital expenditures.” It will be a negative number (cash going out). Some companies also report proceeds from asset sales nearby — don’t confuse net capex (purchases minus proceeds) with gross capex (purchases only).
Key Takeaways
- CapEx is cash spent on long-term assets — it’s capitalized on the balance sheet and depreciated over time, not immediately expensed.
- Growth capex expands capacity; maintenance capex keeps existing operations running. The distinction is critical for valuation.
- Free cash flow = operating cash flow minus capex — making capex a direct driver of FCF.
- Comparing capex to depreciation reveals whether a company is investing for growth or just maintaining the status quo.
- Capital intensity varies widely by industry, which directly affects free cash flow conversion and valuation multiples.
Frequently Asked Questions
Is capex an expense?
Not immediately. Capex is capitalized — recorded as an asset on the balance sheet — and then gradually expensed through depreciation (or amortization for intangible assets). The cash outflow happens upfront, but the income statement impact is spread over the asset’s useful life.
What is the difference between capex and depreciation?
Capex is the actual cash spent to buy or improve an asset. Depreciation is the non-cash accounting charge that allocates that cost over the asset’s useful life. Capex shows up in investing activities on the cash flow statement; depreciation shows up as an expense on the income statement.
Why is capex subtracted from operating cash flow to get free cash flow?
Because capex represents cash the company must spend to maintain or grow its operations. Free cash flow is meant to show the cash available to investors after the business has been funded — and capex is a necessary part of funding the business.
How do you tell if a company is over- or under-investing?
Compare capex to depreciation over time. If capex consistently trails depreciation, the company’s asset base is aging and potentially deteriorating. If capex significantly exceeds depreciation, the company is expanding. Also compare capex-to-revenue ratios against industry peers to gauge relative investment levels.