Total Cost of Ownership
Also: TCO
The full cost of an AI initiative — not just the API bill, but everything: engineering time to build and maintain it, evaluation overhead, change management, training, and ongoing monitoring. Companies typically estimate 3-5x their initial projected costs once these are factored in. The API cost is usually the smallest line item. Understanding TCO is critical for getting accurate ROI numbers and for making the case (or not) for a given AI investment.
In practice
Your API bill is $500/month, but the real cost of your Claude deployment includes the engineer who maintains it (40 hrs/month), the monitoring tools, the occasional human review, and the time to manage incidents. Total Cost of Ownership is all of that added together — the honest number that tells you what AI is actually costing your organization.
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