Capex and OpexCapEx
Capital expenditure (capex) is spending on long-lasting assets such as equipment and buildings, recorded as an asset and depreciated over time. Operating expenditure (opex) is day-to-day running costs such as wages and rent, deducted in full when incurred.
Capital expenditure (capex) is money spent on long-lived assets such as machines and buildings; operating expenditure (opex) covers day-to-day running costs. The split changes how profits look today and over the asset's life. Tax and accounting rules on what must be capitalised differ by country, so always check local standards.
- Category
- Fundamentals and Macroeconomics
- Reading time
- 4 min
- Also called
- Capital expenditure vs operating expenditure, Capital vs operating costs
- Updated
Capex and opex in plain words
For tax, US businesses have always had to decide whether spending on physical property is an expense they can deduct now or a capital cost they cannot.1
Under IFRS, spending on property, plant and equipment becomes an asset only when it will probably bring future economic benefits and its cost can be measured reliably.2
Capex is then charged gradually through depreciation, which reflects the wear on long-lived items such as machines, tools and furniture.3 Rules differ by country.
How to tell capex from opex
List the spending
Separate one-off asset purchases from recurring running costs.
Ask about future benefit
Ask whether the spending will bring benefits beyond this year — if so, it is a candidate for an asset.2
Check repair vs improvement
For US tax, use the IRS framework to separate deductible repairs from capital improvements.1
Record capex at cost
Record the asset at what it cost.2
Depreciate over its life
Spread that cost over the asset's useful life through depreciation.3
Check local rules
Tax and accounting treatment differs by country; confirm with local standards or an adviser.
Worked examples
Example 1 — New machine
$10,000 a year expenseA hypothetical firm buys a machine for $50,000 lasting 5 years.
| Cost | $50,000 |
| Life | 5 years |
| Yearly depreciation | $10,000 |
Buying the machine is capex; US tax rules require costs of acquiring or improving tangible property to be capitalised.1
Example 2 — Repair
Expensed immediatelyA hypothetical firm spends $2,000 fixing a broken belt on the same machine.
| Repair cost | $2,000 |
| Treatment | Expense now |
| Year-one cost | $2,000 |
A routine repair is normally opex, though US tax rules still test whether it is really an improvement.1
Example 3 — Profit effect
Higher reported profit for ATwo hypothetical firms each spend $30,000; one buys equipment (3-year life), one pays for services.
| Firm A year-one cost | $10,000 |
| Firm B year-one cost | $30,000 |
| Profit gap | $20,000 |
Firm A records the purchase as an asset at cost and depreciates it, so its first-year profit looks higher.2
Capex vs opex
| Aspect | Capex | Opex |
|---|---|---|
| What it buys | Long-lived assets | Day-to-day running |
| Accounting | Capitalised, then depreciated | Expensed when incurred |
| Cash flow line | Investing activities | Operating activities |
| Profit impact | Spread over years | Hits profit at once |
Where capex and opex matter
Free cash flow
Analysts subtract capex from operating cash flow in Fundamental Analysis.
Earnings quality
Capitalising costs can flatter Earnings.
Budgeting
Firms plan big asset spending separately from running costs.
Valuation
Heavy capex needs can reduce cash available for a Dividend.
Advantages and disadvantages
Advantages
- Shows how much a firm reinvests.
- Separates one-offs from recurring costs.
- Matches asset costs to the years they help.
- Helps compare business models.
Disadvantages
- Judgement on what to capitalise varies.
- Rules differ by country and standard.
- Capitalising can make profits look better.
- Depreciation lives are estimates.
Going deeper
Read as far as you need. Each level builds on the one before it.
The basic split
Beginner
Capex builds an asset; opex is a running cost. For US tax, the question is whether spending is deductible now or must be capitalised.1
Recognition rules
Intermediate
IFRS has two tests: probable future benefit and a reliably measurable cost.2 US GAAP and local tax codes have their own tests, so treatment differs by country.
Repairs, improvements and tax
Advanced
US tax law makes businesses capitalise the cost of buying, producing or improving physical property, while ordinary repairs may be deducted.1 Other countries draw this line differently, and tax and book depreciation often differ.
Common mistakes
Assuming one global rule
Tax and accounting rules differ by country.
Ignoring capex in cash flow
Profit can look strong while capex drains cash.
Comparing across standards blindly
IFRS and local GAAP firms may classify costs differently.
Forgetting depreciation
Capex reaches Profit and Loss over time.
Check your understanding
Test yourself before moving on. Each answer comes with an explanation.
Key points to remember
- Capex buys long-lived assets; opex runs the business.
- Capex is capitalised and depreciated.
- Opex is expensed when incurred.
- The split changes reported profit timing.
- Rules differ by country — check local standards.
Frequently asked questions
Is software capex or opex?
Why do investors watch capex?
Are tax and accounting treatments the same?
Further learning
- Fundamental Analysis
Using company financials.
- Earnings
How costs shape profit.
- Profit and Loss
Where expenses land.
- Dividend
Cash left for shareholders.
Sources
This article is written in our own words. The sources below support the specific facts, rules and figures marked with a number in the text. Links open the original publisher’s page.
- Internal Revenue Service (IRS). Tangible Property Final Regulations (opens in a new tab) Checked .
- IFRS Foundation. IAS 16 Property, Plant and Equipment (opens in a new tab) Checked .
- SEC. Beginners' Guide to Financial Statements (opens in a new tab) Checked .
Educational content, not financial advice. Examples use hypothetical prices and simplified costs; actual fees, margin rules and regulations vary by broker, market and country. We are not affiliated with any publisher linked above. Last reviewed . Report an error or request a source credit.