Four Common Areas Where AWS Bills Hide 20–30% in Wasteful Spending

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A cloud cost audit expert argues that on a typical $50,000/month AWS account, 20–30% of spending is routinely wasted in four predictable areas: hidden data transfer charges, oversized instances, on-demand pricing on stable workloads, and overpriced storage tiers. NAT Gateway processing fees are flagged as one of the most frequent culprits, where traffic routed through the gateway — including S3 requests — can cost $0.045 per GB, a charge eliminable with a free VPC Gateway Endpoint. Cross-Availability Zone data transfer is another overlooked cost, billed at $0.01 per GB per direction, which can accumulate quickly in distributed, high-traffic applications. The author recommends setting up AWS Cost and Usage Reports for line-item granularity and using Cost Explorer with rightsizing recommendations as a starting point for any audit. Most of these optimisations require no architectural overhaul and can be identified by reading the bill in a structured order using the right AWS tooling.

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