Cloud cost is a design problem, not a billing problem

Most cloud cost overruns trace back to architecture decisions made at design time, not waste discovered after deployment.

Patterns that inflate the bill

1. Lift and shift without rightsizing. A 32-core on-prem server becomes a 32-vCPU cloud instance running at 4 percent utilization.
2. Cross-region traffic that should be intra-region. Data transfer charges dwarf compute for some workloads.
3. Always-on dev environments. Schedules that follow the workday save real money.
4. Snapshots without lifecycle policies. They accumulate forever unless something deletes them.
5. NAT gateways for everything. The pricing model surprises people who do not read it carefully.

What design discipline looks like

Tag every resource with an owner and a purpose. Build cost estimates into the design review, not after deployment. Set budgets per environment with alerts. Treat unit economics like a first-class metric: cost per user, per request, per gigabyte.