Capital expenditure, or capex, is the money a company spends to buy, build or upgrade long lasting assets that it expects to use for more than one year. Instead of hitting the profit and loss account straight away, these costs are recorded on the balance sheet and then recognised gradually over time.
Capex underpins a firm’s capacity to produce goods and services. New factories, upgraded machinery, fibre networks, vehicle fleets and internally developed software are all typical examples. The size, timing and quality of capex shape future growth, margins and free cash flow.
What qualifies as capital expenditure
Capex usually covers spending on physical items such as property, plant and equipment, and on certain intangibles like software, patents and licences. The unifying idea is that the outlay creates or extends an asset that delivers benefits over several periods, not just today. These are the company’s productive assets rather than day to day running costs.
Common capex categories include:
- Land, buildings and leasehold improvements.
- Plant and machinery, tooling and specialist equipment.
- Vehicles and hardware such as servers and networking kit.
- Capitalised software developed for internal use, and purchased software.
- Intellectual property, for example patents and certain licences.
Spending to buy another company is also an investing cash outflow, although firms often call that M&A rather than capex in guidance. An acquisition creates assets too, but analysts usually separate organic capex on existing operations from one off deals.
Leases add a wrinkle. Accounting rules can create a right of use asset when a company signs a long lease, which is capitalised and depreciated much like owned equipment. The associated cash outflows may appear in financing rather than investing on the cash flow statement, so lease heavy businesses can look less capex intensive at first glance even though the economics are similar.
How capex shows up in the accounts
Capex does not go straight through the income statement. Instead it is capitalised on the balance sheet, then expensed over the asset’s useful life through depreciation for tangible items and amortisation for intangible ones.
- Balance sheet: additions increase property, plant and equipment or intangible assets. Net assets, often discussed as book value, rise when a company invests, all else equal.
- Income statement: depreciation or amortisation hits profit each period, spreading the cost. Some borrowing costs can be capitalised into qualifying projects, which reduces current interest expense and increases the asset cost.
- Cash flow statement: cash payments for purchases of property, plant and equipment and for intangible asset additions appear in investing activities. Sales of assets are also shown here and can offset gross spending.
You will sometimes see gross capex, which is total spend on new assets, and net capex, which deducts proceeds from asset disposals. Both are used, so check the definition in each report.
Capex versus operating expenses
Operating expenses, or opex, are the routine costs of running the business, for example wages, utilities, cloud hosting, maintenance and marketing. Opex is expensed immediately, reducing operating profit in the current period. Capex, by contrast, is capitalised and only reduces profit over time via depreciation or amortisation.
This difference matters for performance metrics. EBITDA excludes depreciation and amortisation, so a capex heavy company can show strong EBITDA while still consuming large amounts of cash to maintain and grow its asset base. Free cash flow focuses on cash generation after capex, which many investors view as a better guide to what can be paid out or reinvested.
Maintenance capex, growth capex and investor focus
Not all capex is equal. Maintenance capex keeps existing assets working as they are today, for example replacing worn machinery. Growth capex expands capacity, improves efficiency or launches new products, such as adding a new production line or building a data centre in a new region.
Management teams often discuss planned capex in outlook statements, splitting maintenance and growth where possible. Investors listen for:
- Capital intensity: capex as a percentage of revenue. Asset heavy industries, like utilities and airlines, tend to run higher ratios than software or services.
- Timing and phasing: large projects can take years, with lumpy cash needs that affect leverage and interest costs.
- Expected returns: companies may quote hurdle rates or target returns on invested capital. High quality capex should raise future margins or volumes enough to justify the spend.
Because maintenance capex is the minimum needed to sustain the business, many analysts estimate it to gauge true free cash flow. The rest of the capex is then viewed as optional growth investment, although in practice the line can be blurry.
Finding and estimating capex from reports
The simplest place to find capex is the cash flow statement under investing activities. Common line items include purchases of property, plant and equipment and additions to intangible assets. Notes in the accounts usually give more colour by segment or project.
You can also cross check using balance sheet movements. A stylised reconciliation for tangible assets is:
Ending PP&E = Beginning PP&E + Capex − Depreciation − Disposals ± currency and other
Rearranging gives a rough capex estimate if you know the other figures. For example, suppose PP&E started the year at £1,000m and ended at £1,060m. Depreciation was £120m and disposals were £10m, with no currency effects. Then:
Capex = Ending − Beginning + Depreciation + Disposals = 1,060 − 1,000 + 120 + 10 = £190m
Free cash flow is commonly approximated as cash from operations minus capex. If operating cash flow was £250m and capex was £190m in the example above, free cash flow would be about £60m. Companies may adjust this figure, so always read their definition.
Limits, judgement and common pitfalls
Several judgements sit behind capex numbers. For software and development projects, only certain phases can be capitalised. Research is often expensed, while later development may be capitalised if strict criteria are met. Accounting rules differ by jurisdiction and can change, and firms also set their own capitalisation thresholds, so comparisons need care.
Capex is lumpy. A year with light spend can flatter free cash flow, then reverse when a big programme ramps. Some firms smooth this with multi year guidance, but delivery risks remain, including delays and cost overruns.
Leases complicate the picture. Capitalising a lease creates depreciation and interest instead of rent, which lifts EBITDA even though the economics are similar. Cash payments for the lease principal usually sit in financing cash flows, so capex in investing can look lower than the true reinvestment need. Analysts often adjust metrics to put owned and leased assets on comparable footing.
M&A is another source of confusion. Buying a business increases assets and appears in investing cash flows, but many companies exclude it from capex guidance and from their definition of free cash flow. When assessing the sustainability of cash generation, separate organic reinvestment from acquisitions and asset sales.
Lastly, aggressive capitalisation policies can inflate near term profits by shifting expenses to the balance sheet. The cash still goes out, and over time the higher depreciation and amortisation will catch up. Reviewing disclosures, capital allocation track record and returns on invested capital helps judge whether capex is creating genuine value.