Episode 23 of Cloud Computing with Fexingo digs into the phenomenon of post-migration cost creep: why cloud bills often spike 30-50% in the first six to twelve months after moving from on-premises. Lucas and Luna explore the root causes — from unused idle resources and over-provisioned instances to the hidden cost of data egress and the 'stepping-stone' trap where teams migrate with lift-and-shift, then start adding cloud-native services without re-architecting. They walk through a real-world example from a mid-sized fintech that found its monthly AWS bill jumping from $80,000 to $130,000 within nine months, and how the company clawed back savings by implementing tagging policies, rightsizing, and a FinOps review cadence. The episode also touches on the cultural shift required: engineering teams used to treating infrastructure as free, and the need for cost-aware development. Listeners come away with a mental checklist to avoid the 'bill shock' that catches most cloud adopters off guard.

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