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What Are CAPEX and OPEX? The Difference in IT Spending

CAPEX is investment that becomes an asset; OPEX is an expense of the period. The accounting difference, IT examples and how the cloud shifts the balance.

Oğuzhan Gerçek··7 min read
What Are CAPEX and OPEX? The Difference in IT Spending

Short answer: CAPEX (capital expenditure) is spending to acquire an asset that will be used over more than one period: it goes on the balance sheet as an asset, and its cost turns into expense over the years through depreciation. OPEX (operating expenditure) is spending to keep the business running day to day, expensed in the period it belongs to. In IT, buying server and storage hardware is a typical CAPEX item; a cloud subscription or a managed service fee is typical OPEX. Which one is cheaper depends not on the type of spending but on how steady and predictable the workload is.

What is CAPEX?

Microsoft's Cloud Adoption Framework describes CAPEX in IT this way: it requires a significant up-front investment in hardware and equipment, which the organization records as an asset on its balance sheet.

The accounting framework is set by IAS 16 Property, Plant and Equipment; in Türkiye its counterpart is TMS 16, published by the Public Oversight, Accounting and Auditing Standards Authority (KGK). Under the standard, property, plant and equipment are tangible items held for use in producing or supplying goods or services, for rental to others or for administrative purposes, and expected to be used during more than one period. The cost of an item is recognized as an asset, or capitalized, only if two conditions are met: it is probable that future economic benefits will flow to the entity, and the cost can be measured reliably.

Depreciation: how CAPEX becomes expense

A capitalized cost is not expensed all at once. The standard defines depreciation as the systematic allocation of an asset's depreciable amount over its useful life, and each period's depreciation charge is generally recognized in the income statement.

A simple example: a storage system costing TRY 1,000,000 with an expected useful life of five years, depreciated on a straight-line basis with a residual value of zero, adds TRY 200,000 of expense to the income statement each year. The cash, however, leaves at the time of purchase. This article covers general financial reporting principles; tax rules may differ, so consult your accountant about your own situation.

What is OPEX?

OPEX is spending to keep the business running day to day, expensed in the period it belongs to. In Microsoft's framework, OPEX covers ongoing operating costs, including periodic payments for services like Azure, and the charges reflect actual usage rather than fixed equipment costs.

The standard draws the line with maintenance: an entity does not capitalize the costs of day-to-day servicing of its property, plant and equipment, but recognizes them in the income statement as they are incurred. According to the standard, these costs are mainly labor, consumables and small parts.

The difference between CAPEX and OPEX

  • Recording: CAPEX goes on the balance sheet as an asset and is spread over the years through depreciation. OPEX is an expense of the period it belongs to.
  • Cash: With CAPEX you pay up front and in one go; with OPEX you pay period by period for as long as you use the service.
  • Capacity risk: With CAPEX you set capacity in advance, and the cost of idle capacity stays with you. With OPEX you don't pay for capacity you don't use, but forgotten resources still end up on the bill.
  • Cost allocation: According to Microsoft, an OPEX model lets you allocate application costs to business units (chargeback or showback).

IT spending examples

  • Buying servers, storage and network hardware: CAPEX. Buying a server or a GPU puts an asset on the balance sheet.
  • Perpetual software licenses: IAS 38 lists computer software among its examples of intangible assets; a license that meets the criteria is capitalized and expensed over its useful life.
  • Subscriptions and SaaS: In March 2019, the IFRS Interpretations Committee concluded that a contract conveying only the right to receive future access to the supplier's software is a service contract. The payments are a service fee, not an asset.
  • Cloud usage (IaaS, PaaS): OPEX. You pay period by period according to use.
  • Managed service fees: OPEX. A periodic fee is paid for operating a defined scope (our managed services article).
  • Hardware leasing: Not always OPEX. IFRS 16 requires lessees to recognize assets and liabilities for leases with a term of more than 12 months, unless the underlying asset is of low value.

Why does the cloud turn CAPEX into OPEX?

AWS describes the first advantage of the cloud as trading fixed expense for variable expense: instead of investing in data centers and servers before you know how you will use them, you pay only for what you use. What you gain is flexibility: no capacity guessing and no idle hardware to carry. We explain the model itself in our cloud computing article.

Is OPEX always cheaper?

No. Paying as you go is an advantage when usage fluctuates. A virtual server running 24/7, however, is billed for about 730 hours a month (8,760 / 12), and the price paid for flexibility buys nothing. Providers price this in: AWS offers up to 72% off on-demand prices in exchange for a one- or three-year usage commitment. A commitment brings a CAPEX-like fixedness into OPEX: you get the discount, but you pay even if you don't use the capacity.

That is why owning can cost less for steady, predictable, high-utilization workloads; utilization decides. We work through the GPU side of this calculation in our article on buying versus renting GPUs and the virtual server side in our IaaS article.

TCO: setting up the comparison correctly

Measuring cost advantage by the purchase price or the monthly bill alone is misleading. Total cost of ownership (TCO), in the words of the UK government's ICT strategy guidance, "looks at the complete cost from purchase to disposal." The guidance groups costs into three:

  • Acquisition: Purchase price, licenses, hardware, integration.
  • Operation: Use, maintenance, upgrades, support services, training, carbon footprint.
  • End of life: Retirement, disposal, migration of data and users.

The cloud side has easily missed items too, such as egress fees and idle resources.

Cash flow, flexibility and FinOps

CAPEX ties up cash up front but largely fixes the cost of the following years. OPEX spreads cash over time; in exchange, the bill can change every month. Türkiye adds another dimension: with a subscription priced in a foreign currency, exchange-rate moves reach the bill every month, while for hardware paid for up front in a foreign currency, the currency risk materializes once, at the time of purchase.

The discipline that makes a variable bill manageable is FinOps. The FinOps Foundation defines it as "an operational framework and cultural practice which maximizes the business value of technology, enables timely data-driven decision making, and creates financial accountability through collaboration between engineering, finance, and business teams." We explain the method in our FinOps article. Organizations that want to hand over infrastructure operations and cost tracking together can look at our infrastructure management and managed cloud services pages.

Frequently asked questions

What does CAPEX mean? Capital expenditure: spending to acquire an asset that will be used over more than one period, capitalized on the balance sheet.

What does OPEX mean? Operating expenditure: spending to keep the business running day to day, expensed in the period it belongs to.

What is the difference between CAPEX and OPEX? CAPEX becomes an asset and is spread over the years through depreciation; OPEX is an expense of the period. CAPEX is paid up front, OPEX as you go.

Is cloud spending CAPEX or OPEX? Cloud services paid for as you use them count as OPEX. One- or three-year commitments lower the unit price but also fix the spend.

Is a software license CAPEX or OPEX? A perpetual license that meets the criteria is capitalized as an intangible asset; subscription and SaaS payments are generally expensed as a service fee. Ask your accountant about your own books.

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