AWS EC2 Cost Optimization: What Actually Reduces Your Compute Bill

Key takeaways Rightsizing is the highest-leverage EC2 cost optimization step because instance size affects cost, performance, and fleet efficiency simultaneously. ScaleOps helps automate this process in Kubernetes-on-EC2 environments. Pricing strategy only works after demand is understood; otherwise, Savings Plans and Reserved Instances can lock you into paying for more capacity than you actually need. Auto Scaling groups are still the default for standard EC2 fleets, but Kubernetes workloads on EC2 often benefit from Karpenter’s faster provisioning and better bin-packing.