---
id: "prereq-tco-concept"
type: "prereq"
source_timestamps: ["§ Stage 4: Scale & Operate Portfolio (Navigate)"]
source_url: "https://hbr.org/2026/01/manage-your-ai-investments-like-a-portfolio"
source_title: "Manage Your AI Investments Like a Portfolio"
tags: ["finance", "it-management"]
related: ["action-track-tco-and-impact"]
reason: "The text advises implementing cost-tracking to understand the Total Cost of Ownership in Stage 4, assuming the reader understands that TCO includes not just development, but maintenance, infrastructure, upskilling, and integration costs over time."
sources: ["spine"]
sourceVaultSlug: "hbr-seg-spine"
originDay: 1
articleStem: "hbr-foci-61-ai-investments-portfolio"
sourceUrl: "https://hbr.org/2026/01/manage-your-ai-investments-like-a-portfolio"
sourceTitle: "Manage Your AI Investments Like a Portfolio"
---
# Total Cost of Ownership (TCO)

> **Prerequisite knowledge:** Total Cost of Ownership (TCO).

The text advises implementing cost-tracking to understand the Total Cost of Ownership in Stage 4, assuming the reader understands TCO includes not just development, but maintenance, infrastructure, upskilling, and integration costs over time. Required to act on [[action-track-tco-and-impact]] and to interpret [[claim-production-cost-spike]].

**Reference:** TCO is a standard concept in IT financial management and cloud economics.