The cloud bill explained: A guide for finance and engineering
The cloud bill arrives at the end of every month, and somewhere in it sits a line item that nobody outside the infrastructure team really understands. It might be called "data transfer," "egress," or "outbound bandwidth," and it might be 5% of the total or even 25%. Whatever it is, it tends to be the line that finance asks engineering about, and engineering struggles to explain in a way that finance can act on. The problem is that egress is a fee that hides in plain sight. It's not on the marketing page.