What is Capital Expenditure (CapEx)? Definition, Types & Industry Benchmarks
Capital expenditure (CapEx) is money spent acquiring or upgrading long-term assets. Learn how CapEx affects free cash flow, how to measure capex intensity, and how it differs by industry.
What is Capital Expenditure?
Capital expenditure (CapEx) is money a company spends to acquire, maintain, or upgrade long-term physical assets — such as factories, data centers, machinery, equipment, or real estate. Unlike operating expenses (OpEx), which are consumed within a single accounting period, capital expenditures create assets that provide value over multiple years.
CapEx is recorded as an asset on the balance sheet and depreciated over the asset’s useful life. The cash payment appears in the investing activities section of the cash flow statement.
CapEx Formula and Free Cash Flow Connection
$$\text{Free Cash Flow} = \text{Operating Cash Flow} - \text{Capital Expenditures}$$
This is the most important formula involving CapEx. Every dollar spent on capital expenditure directly reduces free cash flow — which is why high-CapEx businesses tend to generate less FCF relative to their earnings than asset-light businesses.
$$\text{CapEx Intensity} = \frac{\text{Capital Expenditures}}{\text{Revenue}} \times 100%$$
CapEx intensity measures how capital-intensive a business is relative to its size.
Maintenance CapEx vs. Growth CapEx
Not all capital expenditure is the same. Analysts distinguish between:
Maintenance CapEx
Spending required just to keep current assets operational — replacing worn equipment, maintaining data centers, upgrading network infrastructure. This is an unavoidable cost of running the business.
Growth CapEx
Spending to expand capacity, enter new markets, or build new infrastructure. Growth CapEx is optional in the short term but necessary to sustain revenue growth. AI data center construction at Alphabet, Microsoft, and Meta is the defining example of growth CapEx in the current era.
Most companies do not separately disclose maintenance vs. growth CapEx, making it a judgment call for analysts. A general heuristic: depreciation expense ≈ maintenance CapEx for stable businesses.
CapEx by Industry: Intensity Benchmarks
| Industry | Typical CapEx % of Revenue | Examples |
|---|---|---|
| Oil & Gas | 10–20% | ExxonMobil, Chevron |
| Semiconductors (fab) | 15–25% | TSMC, Intel |
| Airlines | 8–15% | Delta, United |
| Telecom | 10–18% | Verizon, AT&T |
| Auto Manufacturing | 5–10% | Ford, GM |
| Cloud/AI Infrastructure | 10–25% (rising) | Alphabet, Microsoft |
| Consumer Internet | 3–8% | Meta, Snap |
| Enterprise Software | 1–5% | Salesforce, Workday |
| Asset-Light Consumer | 1–4% | Apple, Nike (outsourced mfg) |
The lower the CapEx intensity, the more cash-generative the business model tends to be relative to reported earnings.
Real Company CapEx Examples (2025)
| Company | CapEx (est. 2025) | Revenue | CapEx % Revenue |
|---|---|---|---|
| Alphabet | $91.4B | $402.8B | 22.7% |
| Microsoft | ~$53B | $305.5B | ~17% |
| Apple | ~$12B | $435.6B | ~2.8% |
| Meta | ~$38B | ~$164B | ~23% |
| Nvidia | ~$3B | ~$187B | ~1.6% |
Sources: SEC EDGAR. Estimated from OCF minus FCF where not separately disclosed.
The contrast between Alphabet ($91.4B capex, 22.7% intensity) and Nvidia (~$3B, ~1.6% intensity) illustrates the fundamental difference between a capital-intensive infrastructure business and an asset-light chip designer. Nvidia designs chips but outsources fabrication to TSMC — so its capex is minimal relative to revenue.
The AI CapEx Surge (2024–2025)
A defining theme across large technology companies in 2024–2025 has been an unprecedented surge in capital expenditure driven by AI infrastructure investment. The “hyperscalers” — Alphabet, Microsoft, Meta, and Amazon — committed to combined annual CapEx of approximately $300 billion in 2025.
This surge has created a paradox: operating cash flow is at record highs at these companies, but free cash flow has grown far more slowly because nearly all the incremental cash is being reinvested in AI data centers and GPU/TPU clusters.
For example, Alphabet’s operating cash flow grew 31.4% in 2025 to $164.7B — but free cash flow barely grew (from $72.8B to $73.3B) because CapEx nearly doubled from $52.5B to $91.4B. See Alphabet’s free cash flow history for the full trend.
CapEx vs. OpEx: Why the Distinction Matters
| CapEx | OpEx | |
|---|---|---|
| Income statement | Not expensed immediately (depreciated) | Fully expensed in period incurred |
| Balance sheet | Creates asset | No asset created |
| Cash flow | Reduces FCF | Reduces OCF and FCF equally |
| Tax effect | Deductible over asset life | Fully deductible in period |
| Examples | Data center, factory, equipment | Salaries, rent, software subscriptions, R&D |
Companies sometimes make strategic choices between CapEx and OpEx. Cloud computing has enabled many companies to shift from CapEx (buying servers) to OpEx (paying AWS/Azure monthly), reducing capital intensity and improving FCF.
Key Takeaways
- CapEx is spending on long-term assets — it directly reduces free cash flow
- Maintenance CapEx keeps the business running; growth CapEx expands it
- CapEx intensity varies enormously by industry: 1–3% for asset-light tech vs. 15–25% for infrastructure and manufacturing
- The 2024–2025 AI infrastructure wave drove hyperscaler CapEx to record levels, compressing FCF despite surging operating cash flows
- Asset-light business models (Nvidia’s fabless chip design, software companies) generate far more FCF per dollar of revenue than capital-intensive peers
Frequently Asked Questions
What is the difference between CapEx and OpEx? CapEx (capital expenditure) buys long-term assets that are depreciated over multiple years. OpEx (operating expenditure) covers day-to-day costs fully expensed in the current period. CapEx reduces free cash flow; OpEx reduces both operating cash flow and free cash flow.
How does CapEx affect free cash flow? Free cash flow equals operating cash flow minus CapEx. Every dollar of capital expenditure directly reduces FCF by one dollar. High-CapEx businesses like utilities and telecom companies generate far less FCF relative to their EBITDA than low-CapEx software or consumer internet companies.
Why is Alphabet spending $90 billion in CapEx? Alphabet is building AI data centers and acquiring GPU and TPU compute infrastructure to support Google Search AI Overviews, Gemini model training, and Google Cloud AI services. The investment is both defensive (staying competitive in AI search) and offensive (capturing enterprise AI cloud workloads). See Alphabet’s free cash flow history for the FCF impact.
Is high CapEx always bad? Not necessarily. Growth CapEx that generates strong returns on invested capital can create significant shareholder value. The question is always whether the incremental revenue and earnings generated by the investment exceed the cost of capital. High CapEx is a concern when it depresses FCF without generating commensurate revenue growth.