Capex vs Opex: the line that decides who gets to say yes

Capex (capital expenditure) is money spent to acquire, upgrade or extend the life of a long-term asset. Opex (operating expenditure) is money spent running the business day to day. Capex is capitalised on the balance sheet and depreciated over the asset's useful life; opex is expensed in full in the period it is incurred.

The practical consequences go further. Classification determines who can approve the spend, which budget it draws on and how the organisation follows it up after the decision.

Operating expenditure (opex) is the recurring cost of running the business: the resources consumed in the current period to keep operations going. Opex is expensed immediately, so it reduces reported profit in the period it is incurred rather than being spread over future years.

Opex is managed inside annual operating budgets and rolling forecasts, owned by cost-centre managers, and adjusted period to period as conditions change. That flexibility is the practical difference. An operating budget can often be reduced next quarter, while a sanctioned capital project is much harder to reverse.

Examples of Opex

• Salaries, contractor fees and other personnel costs
• Energy, water and consumables used in production
• Raw materials and inventory purchases
• Routine and preventive maintenance that keeps assets in current condition
• Rent, insurance, utilities and facility running costs
• Software subscriptions, support contracts and cloud services

The core accounting test is whether the spend creates or enhances an asset with a useful life beyond the current period. If it does, the cost is capitalised and depreciated; if it simply maintains current operations, it is expensed.

1. Balance sheet vs income statement. Capex increases asset value on the balance sheet. Opex reduces profit on the income statement straight away.
2. Depreciation and amortisation. A capitalised asset is written down over its useful life, so the profit impact is spread rather than immediate.
3. Cash flow classification. Capex appears under investing activities and opex under operating activities. Two companies with the same total spend can therefore show very different operating cash flow.
4. Tax treatment. Opex is generally deductible in the period incurred, while capitalised assets are relieved through depreciation or capital allowances over time, subject to local rules.
5. Thresholds and policy. Most organisations set a capitalisation threshold and written policy so that similar spend is classified the same way across sites and business units.

Treatment follows the applicable accounting standards (such as IFRS or local GAAP) and your own capitalisation policy. This article explains the concepts; it is not accounting advice.

Operating budgets are annual, incremental and largely continuous: last year's cost base, adjusted. Capital planning is different in kind. Each investment is discrete, competes with other investments for a limited envelope, and commits the organisation over multiple years.

1. Candidates, not line items. Capital requests arrive as individual cases with cost profiles, benefits and risks that can be compared.
2. Mandatory before discretionary. Safety and compliance investments are reserved first; the rest compete for what genuinely remains.
3. Prioritisation against strategy. Ranking should reflect strategic contribution and risk of deferral, not submission order or negotiating strength.
4. Multi-year sequencing. A plan must fit delivery capacity, shutdown windows and cash profile, not just the annual total.
5. Post-investment review. Capital decisions can be checked against the case that justified them. This discipline improves the next round of estimates. The capex process ties those phases together.