Hidden Costs in Cloud Networking: Why Your NAT Gateway Bill Is Exploding

Networking costs often hide in AWS bills until they spiral into thousands per month—particularly through NAT Gateway charges that stack with hourly fees, data processing, and egress costs. Real-world cases show the impact: one company slashed $310,000 monthly by switching architectures, while a CI/CD misconfiguration ballooned to a $12,000 bill. Understanding where costs actually flow in your VPC architecture is critical to preventing these surprises.