Total Cost of Ownership
Lifetime cost including people, operations, upgrades and exit.
3 to work through
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intermediate
A repatriation business case sets this year's cloud invoice against a five-year amortised cost for owned hardware and shows a 40% saving. The arithmetic checks out and the staffing line is there. Review the model: what would you change, what would you leave alone, and which single line decides the argument?
3 min answer -
intermediate
A team proposes self-hosting a managed service to save £80000 a year in licence fees. What do you add to their calculation?
2 min answer -
advanced
A company evaluating whether to move a workload off public cloud computes a lower monthly infrastructure bill for owned hardware. Which costs does that comparison typically omit?
2 min answer
2 terms in this topic
Hidden Cost Categories
The recurring costs routinely omitted from total-cost-of-ownership comparisons, which usually exceed the licence or infrastructure line everyone argu…
conceptTotal Cost of Ownership
The full lifetime cost of a choice — infrastructure, licences, and the engineering time that is usually the largest term and the one omitted.
1 artifact you would hand over
Neighbouring topics
Cost & FinOps
General material on the economics of an architecture.
Cloud Pricing Models
On-demand, committed and spot, and the crossover arithmetic.
Reserved & Committed Capacity
Committing the baseline, laddering terms, and expiry as a silent failure.
Spot & Interruptible Capacity
Deep discounts for work that can be interrupted and resumed.
Unit Economics
Cost per request, per tenant, per transaction — the actionable number.
Cost per Request
Fully-loaded per-unit cost, including the lines usually left out.
Storage Costs
Tiering, lifecycle policies, retrieval charges and minimum durations.
Network & Egress Costs
Cross-zone and cross-region transfer that appears on no diagram.
Compute Optimisation
Instance families, utilisation, and architecture that wastes less.
Rightsizing
Matching provisioned resources to observed demand rather than to a guess.
Cost Allocation
Tagging enforced at provisioning, and apportioning shared costs.
Showback & Chargeback
Making teams see, or own, the cost of what they run.
Architecture Cost Modelling
Pricing a design before building it, at expected and at ten times volume.
Cost vs Reliability
Each nine costing an order of magnitude, and pricing the failure instead.
Observability Cost
Telemetry bills, cardinality control and retention tiering.
Licence & Vendor Costs
Per-core, per-seat and per-environment terms that shape designs.
FinOps Practice
Inform, optimise, operate — and cost as a design-review criterion.
Waste Elimination
Idle environments, orphaned volumes, forgotten instances, dead data.
Cost Governance
Budgets, anomaly alerts, quotas and preventive policy.