With the rise of as-a-Service delivery models, IT departments are faced with decisions beyond choosing the right technology. There is now a range of payment options to choose from, the trick is to know which one is right for your company and your current project.
Capital Expenditure (Capex) is normally used for a major investment and is shown on the company’s balance sheet. The capital is exchanged for an asset, which can then be amortised and depreciated over its lifespan, and can add value to the business. Operational Expenditure (Opex) is used for ongoing expenses. It’s shown on the profit and loss statement and it isn’t exchanged for tangible assets. However, Opex is usually tax deductible, which may offset the fact that it doesn’t deliver an asset that can be depreciated.
The first step is to truly understand the breakdown of IT-related costs. Along with the obvious costs of infrastructure, hardware and software, there are also ongoing maintenance and staff costs, ‘hidden’ costs like the energy to power and cool the equipment, or the cost of real estate within the office. Only once the business understands the complete costs involved can a decision be made to choose on-premise infrastructure that requires Capex, or a cloud service provider that requires Opex.
Conventional wisdom suggests that Opex is preferred for IT systems where possible because it’s usually cheaper. UC Berkeley Reliable Adaptive Distributive Systems Laboratory (RAD Lab) estimates that cloud providers have lower costs by 75 to 80 per cent compared with internal data centres. So it may be true that a cloud-based solution is less expensive than an on-premise, however there are other things to consider when it comes to deciding between Opex versus Capex.
Purchasing hardware and infrastructure via Capex means the business owns the asset. As well as amortising and depreciating the asset for taxation purposes, the business can also extract value from the asset after its useful life by selling it either whole or for parts. Furthermore, plenty of IT hardware continues to run without issue until well after its anticipated lifespan with careful maintenance.
However, owning the asset also means the business is stuck with the asset, even if something better and more useful comes along. This can be frustrating for businesses that want to leverage new and emerging technologies.
By contrast, an Opex model means the business doesn’t own the asset but is also not locked into hardware that may quickly become obsolete. By choosing a cloud approach, the business can get access to the latest technology without necessarily incurring higher costs.
The Opex model means companies pay only for the capacity they use, which can be invaluable for organisations that experience spikes and lulls in demand. Instead of paying upfront for storage or compute power that sits idle for days, weeks, or even months at a time, the business can pay less when demand is low, then ramp up when needed.
The final decision of whether to choose Capex or Opex for IT needs depends on the company’s requirements and budget. With both payment methods having pros and cons, it makes more sense for businesses to decide on cloud versus on-premise solutions based on efficiency and agility, rather than cost alone.
 “Above the Clouds: A Berkeley View of Cloud Computing” by Michael Armbrust, Armando Fox, Rean Grifﬁth, Anthony D. Joseph, Randy Katz, Andy Konwinski, Gunho Lee, David Patterson, Ariel Rabkin, Ion Stoica, and Matei Zaharia. Technical Report EECS-2009-28, EECS Department, University of California, Berkeley. http://d1smfj0g31qzek.cloudfront.net/abovetheclouds.pdf