Compare the true total cost of ownership between on-premise servers and Azure cloud over 1, 3, and 5 year horizons.
The decision to move to the cloud is often driven by cost, but comparing on-premise and cloud pricing is not straightforward. This guide helps UK businesses calculate the true total cost of ownership for both options over 1, 3, and 5 year periods. It accounts for hardware refresh cycles, electricity, cooling, staff time, licensing, and Azure consumption pricing to provide an honest financial comparison that supports informed decision-making.
Finance directors, IT managers, and business owners at UK businesses evaluating whether to migrate from on-premise servers to Azure cloud infrastructure.
It depends on the time horizon and workload pattern. Azure often reduces costs over a 3-5 year period by removing hardware refresh cycles, but on-premise can appear cheaper in year one before depreciation and maintenance costs accumulate. Most UK SMEs find cloud economics improve significantly once electricity, cooling, and staff time are factored in.
Hidden on-premise costs typically include electricity and cooling, often several hundred pounds a month for a small server room, hardware refresh every 4-5 years, backup infrastructure, and IT staff time spent on patching and maintenance. These rarely appear in an initial hardware quote but add up significantly over a server's lifespan.
A proper TCO calculation compares upfront hardware and licensing costs against ongoing cloud consumption charges over matching time horizons, typically 1, 3, and 5 years, and includes electricity, staff time, and hardware refresh cycles on the on-premise side. This guide provides a framework and template for making that comparison fairly.
Hybrid cloud keeps some workloads on-premise while migrating others to Azure, often used to phase migration costs over time or retain legacy systems that aren't cloud-ready. Most UK SMEs use hybrid as a transition stage rather than a permanent end state, since running two environments typically carries some duplicated management overhead.
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