Ecommerce Growth & Retail Marketplaces
CUR 2.0 (generally available 2024, default for new exports in 2025) adds line-item resource IDs and Savings Plan attribution columns Athena needs for serious chargeback. A standard FinOps query pack answers top-10 services, untagged spend, and SP coverage in under 60 seconds.
Compute Optimizer added 32-day lookback for cyclic workloads in 2025, which matters for monthly batch jobs that looked oversized on 14-day windows. In a June 2026 audit of a $48k/mo account, rightsizing recommendations alone modeled $11k/mo savings at low performance risk.
Aurora bills instance hours plus storage plus I/O, or storage at a 125% premium with I/O bundled (I/O-Optimized). Serverless v2 at $0.12 per ACU-hour wins on variable workloads, loses on steady traffic above roughly 2 ACU average. Global Database doubles the price per secondary region plus replicated-write fees. Backtrack adds per-change-record cost most teams never factor in.
Bedrock AgentCore is metered across twelve distinct components: Runtime, Browser, Code Interpreter, Gateway, Identity, Memory (two tiers), Observability, Evaluations, Payments, Search, and the underlying model spend. Two of them drive 80% of the bill.
CloudFront bills $0.085/GB egress in North America tiered down to $0.020/GB at extreme volume, plus $0.0075 to $0.0100 per 10K requests, plus origin egress. Regional price classes drop the bill 30 to 60% by skipping expensive geographies. Real-time logs bill $0.01 per million entries plus a Kinesis data stream, so sample them on high-traffic sites. Lambda@Edge is far more expensive than CloudFront Functions.
CloudWatch bills across ten distinct dimensions: Logs ingestion at $0.50/GB, Logs storage, custom metrics with cardinality multipliers, alarms tiered by resolution and type, dashboards at $3 each, Synthetics canary runs, RUM events, X-Ray traces, Container Insights, and cross-region replication. Logs ingestion is the largest line on most accounts.
DynamoDB on-demand bills $0.625 per million writes and $0.125 per million reads: pay-per-request convenience with no capacity planning. Provisioned at $0.00065/WCU-hour wins on steady traffic above ~30% utilization. Every GSI doubles the write cost, IA tier cuts storage 60% but adds 25% to request fees, and Global Tables compound the bill per region.
EBS is billed across six dimensions: gp3 storage at $0.08/GB-month, separate IOPS and throughput line items, io2 Block Express, snapshots at $0.05/GB-month, fast snapshot restore at $0.75/DSU-hour. Deleting an EC2 instance never stops the volume bill, and the gp2→gp3 migration is one of the cleanest 20% wins in cloud cost.
ECR storage is $0.10/GB-month, about 4× S3 Standard. Cross-region replication doubles or triples that. Enhanced scanning bills $0.09 per image scanned, on every push. Pull-through caches for Docker Hub and ECR Public add storage plus data-transfer-in. A 200-service organization with 10 environments and 3 regions can spend more on ECR than on the EKS clusters pulling from it.
EFS Standard is $0.30/GB-month, over 13× S3 Standard. Standard-IA is 92% cheaper at $0.025; Archive is 97% cheaper at $0.008. Elastic Throughput (the 2024 default) bills $0.03/GB read and $0.06/GB write per transfer. Throughput mode and storage class decisions, made once at provision time, control the bill more than any usage pattern.
EKS control planes are $73/month per cluster. Stay on a Kubernetes version beyond its 14-month standard support and Extended Support bills $0.60/cluster-hour ($438/month per cluster), a 6× multiplier vs standard. EKS Auto Mode adds a ~12% markup over standard EC2 + EBS for managed compute simplicity. The compute side (Karpenter, Spot, Graviton) is where most of the bill lives.
EventBridge looks like a $1/million-events service. It is actually six different billing dimensions: custom events, Pipes at $0.40/M, API Destinations at $0.20/M, Schema Discovery at $0.10/M, Archive at $0.10/GB-month, and cross-region replication that doubles the publish line. Built-in AWS-service events are free; custom buses are where the bill lives.
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