Cluster E · AWS Cost Optimization & FinOps
Cut your AWS bill without cutting corners
The levers that actually move an AWS bill: Savings Plans & Reserved Instances, right-sizing, Spot, Graviton, storage tiering, the data-transfer traps nobody warns you about, and the budgets & anomaly alerts that keep it down, with real numbers.
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Start here
- AWS cost optimization: the 2026 lever listAWS cost optimization in 2026: commitments, right-sizing, Spot, Graviton, storage, data transfer and governance, ranked by savings and effort.
- AWS cost optimization tools: the 2026 buyer's guideAWS's 7 native cost tools vs third-party platforms (Vantage, Kubecost, ProsperOps): what each does, what is free, and when a paid platform pays off.
- AWS FinOps: the operating model that makes engineering own the billAWS FinOps explained: the Inform, Optimize, Operate loop, principles, roles, practices, crawl/walk/run maturity and KPIs, or have a partner run it.
- How to reduce AWS costs: the 15-move playbookHow to reduce AWS costs in 2026: the 15 highest-ROI moves, ranked by savings per effort and sequenced, with typical savings, effort and how-to for each.
- AWS bill audit: the path to a lower billAn AWS bill audit turns your billing data into a dollar-quantified savings roadmap in about 1 to 2 weeks: what it covers, what it finds, DIY vs partner.
Commitments (the biggest lever)
- AWS Savings Plans: the 2026 commitment guideAWS Savings Plans in 2026: Compute, EC2 Instance, SageMaker and Database plans, 1 vs 3-year terms, Savings Plans vs RIs, coverage targets and laddering.
- Compute Savings Plans: sizing, tradeoffs and laddering (2026)Compute Savings Plans give up to 66% off on-demand across EC2, Fargate and Lambda. The tradeoff vs EC2 Instance SP, sizing in Cost Explorer, laddering.
- AWS Reserved Instances — the 2026 guideWhere AWS Reserved Instances still win in 2026 (RDS, ElastiCache, Redshift, OpenSearch): Standard vs Convertible, terms, coverage and stranded RIs.
Compute & right-sizing
- EC2 right-sizing: the 2026 practitioner playbookRight-size EC2 to real utilization: AWS Compute Optimizer, the metrics that matter (incl. memory), RDS, EBS and Lambda, Graviton and a safe test loop.
- EC2 Spot Instances: the practitioner's cost guideEC2 Spot Instances are spare AWS capacity at up to 90% off with a 2-minute notice. What is safe on Spot, avoiding interruptions, Karpenter, Fargate Spot.
- AWS Graviton migration: the 2026 price-performance guideAWS Graviton (ARM) price-performance: which workloads switch with a flag, which need a recompile, the per-service savings and a staged rollout plan.
Storage & data transfer
- S3 Intelligent-Tiering: the 2026 cost guideHow S3 Intelligent-Tiering moves objects between tiers, the monitoring-fee breakeven, objects under 128 KB, and when lifecycle rules are cheaper (2026).
- S3 cost optimization: the full 2026 lever listS3 cost optimization: every cost component, storage classes and Intelligent-Tiering, lifecycle policies, hidden costs, egress fixes and Storage Lens.
- RDS cost optimization: the 2026 database-tier guideRDS and Aurora cost optimization: right-sizing, Graviton, Reserved Instances and Database Savings Plans, gp3, Aurora Serverless v2 and snapshot cleanup.
- AWS data transfer costs: the pricing mapAWS data transfer pricing by path: internet egress, cross-AZ, inter-Region and NAT. How to find the spend in Cost Explorer and the CUR, and how to cut it.
Visibility & governance
- AWS Budgets: setup, alerts and governance (2026)AWS Budgets guide: the four budget types, forecast alerts to email, SNS or Slack, Budget Actions that stop resources, and Budgets vs Anomaly Detection.
- AWS Cost Explorer: read the bill, then cut it (2026)A practical guide to AWS Cost Explorer: the group-by views that find waste, daily vs monthly, amortized vs unblended, Savings Plans reports, forecasting.
- AWS Cost Anomaly Detection: setup, alerts and response (2026)AWS Cost Anomaly Detection: the four monitor types, alert thresholds ($ vs % vs ML), tuning false positives, the response workflow, and vs Budgets.
- AWS cost allocation tags: the metadata layer that makes the bill allocatableAWS cost allocation tags explained: AWS-generated vs user-defined, activation, a taxonomy, enforcement (Tag Policies, SCPs, IaC, Config), and showback.