IaaS vs Traditional Servers: What’s Cheaper for a London SME in 2026?

Compare a £9,000 server quote against a cloud subscription costing a few hundred pounds a month, and the server looks cheaper. That comparison leaves out most of what determines real cloud computing costs and most of what a physical server costs to run over time. Power, cooling, support contracts and the hardware refresh that comes round on schedule all add up. Here is what the fuller picture looks like for a London business weighing up the two. 

The server costs UK businesses often miss 

A server quote covers the hardware itself, not what it costs to run for the next five years. 

Power is one of the first costs people miss. A small server room can easily add a couple of thousand pounds a year to the electricity bill once you count the servers themselves and the extra cooling they need. UK businesses have been paying around 24p per kWh for electricity in early 2026, according to the government’s Quarterly Energy Prices data. 

Ongoing support contracts rarely make it into the first comparison. Manufacturers typically charge for hardware support every year, and that can easily add another one or two thousand pounds on top. Warranty and firmware support usually only lasts three to five years, so once that support runs out, so does the vendor’s help with patching security problems. 

Downtime is the hardest cost to put a number on and the easiest to underestimate. If a single server fails, how quickly the business is back up depends on how recent the last backup was and whether a replacement part is ready to go. 

How IaaS pricing works 

Most IaaS subscriptions are billed on what is called pay as you go. The bill reflects what gets used each month. A fixed asset in a cupboard costs the same whether it is busy or not. Microsoft’s own pricing documentation for Azure describes this as the standard model for virtual machines and storage, with lower rates available for workloads that run all the time. That matters for planning. A business with steady, constant demand can lock in a lower rate, while one with occasional spikes only pays for the extra capacity when it needs it. 

What is included in that monthly fee differs by provider. A typical hosting subscription, such as 4TC’s IT as a Service, usually bundles the servers and storage with backup and a level of redundancy already built in. Patching is often included too. Power and cooling become the provider’s problem rather than the client’s, which is one reason a cloud quote can look more expensive per month than the fuller picture on the other side. 

What cloud computing costs look like over five years 

For a typical small office setup, the numbers can look something like this. 

That running cost for physical servers also assumes nothing goes wrong. It does not include the extra time and cost of managing backup and patching in house, which is usually already included in a hosted subscription. 

The difference between the two totals is not huge, and that is the point. A realistic cloud migration ROI rarely shows a dramatic difference. What changes is the shape of the spending. One option means a lump sum followed by a repeat purchase down the line. The other means one predictable monthly cost with nothing to repeat. Businesses that prefer predictable costs, or that are close to their next hardware refresh, tend to see the clearer benefit. 

Other factors worth weighing up 

Cloud computing costs are only one part of the comparison. A physical server is sized for what the business needs right now. Scaling it up usually means another order and another wait for delivery. A hosted setup can usually be resized within hours, so a business taking on new work is not stuck waiting for procurement to catch up. 

Security works in a similar way. The National Cyber Security Centre’s cloud security guidance explains the shared responsibility model behind most hosted IT services. The provider looks after the physical infrastructure. The client is still responsible for setting up access and data correctly. That does not remove the client’s own responsibilities, but it does mean the physical security of the data centre and the patching of the platform are looked after by a team whose full-time job is exactly that. 

Backup and recovery is often where the difference is biggest in practice. The government’s most recent Cyber Security Breaches Survey found only 44% of small businesses currently have a continuity plan that covers this kind of disruption, down from 53% the year before. Recovery for a physical server depends on backups being current and stored somewhere other than the server that just failed. Hosted setups, such as 4TC’s disaster recovery service, tend to build this kind of redundancy in as standard, so it is not something a business has to design and pay for separately. 

When your own server can still make sense 

A physical server is not the wrong choice for every business. A business that bought its hardware recently and still has a warranty left has little financial reason to move, as long as the workload stays steady. Specialist software tied to a particular local setup can also be harder to move than an ordinary file server. Businesses with specific data residency needs may also find that having physical control over where information sits matters more than the monthly running cost. 

The right setup usually depends on where a business sits in its own hardware cycle. A general rule that cloud is always cheaper misses the timing question. Timing changes the maths. The closer a business is to its next hardware refresh, the stronger the case for costing out the alternative before signing off on another purchase. 

If your last server purchase is closer to its replacement date than its first birthday, this is worth costing out properly using your own numbers, with an example like the one above only as a starting point. 4TC works with businesses across London and Essex on this exact kind of comparison, looking at real usage and support needs alongside list prices. 

4TC can put together a tailored comparison between the cloud and physical servers for your own business. Get in touch to find out what that would look like in practice.