Method and assumptions
Allocate shared infrastructure consistently, and separate usage-sensitive cost from fixed tooling. This is a planning allocation, not a cloud provider invoice.
Cost per customer = (cloud + observability + tooling) ÷ active customers.
Common questions
Should engineering salaries be included?
Keep salaries separate for a direct infrastructure view, or add them consistently for a fully loaded view.
Why allocate by active customers?
Use a driver that matches your cost behavior; usage-based allocation may be better for variable workloads.
Independent planning calculator. Not financial, tax, legal or investment advice.