The Ghost in the Ledger
You notice it when finance asks who invited it
The Ghost in the Ledger is what happens when AI inference costs are shared across teams, cost centers, and projects without clear ownership. Nobody invited it. Nobody owns it. But every month, the cloud bill grows, and somewhere in the shared-platform charges, the Ghost is feeding.
Symptom
Finance asks who approved the AI spend. Nobody did. The charges sit in a shared cost center that every team uses and no team owns. Inference costs arrive wearing someone else's badge — reclassified, reallocated, and quietly absorbed until they're too big to hide.
Why It Matters
The Ghost doesn't steal money. It steals accountability. As long as the costs are shared, no one team feels the pain of reducing them. By the time finance traces the spending, the Ghost has moved to a new cost center, and the pattern repeats.
What the Chapter Gives You
How to spot the Ghost before finance does, why shared cost centers are its natural habitat, and the FinOps practices that make AI spend visible and attributable.
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