Amazon EC2 Cost Optimization
EC2 is the single largest line item on most AWS bills. Teams routinely overprovision instances "just in case," leave dev/staging environments running 24/7, and forget to clean up instances from finished projects. The result is a steady accumulation of idle and oversized compute that silently inflates your monthly bill.
Common EC2 cost waste patterns
Oversized instances
Instances running at 5-15% average CPU utilization are paying for capacity they never use. This is the most common EC2 waste pattern.
Idle instances
Forgotten dev, staging, and test instances that nobody is using but are still running and accruing hourly charges.
Previous-generation instance types
Running on older instance families (m4, c4, r4) when current generations offer better price-performance at the same or lower cost.
Non-production running 24/7
Dev and staging environments left running overnight and on weekends when nobody is using them.
How to reduce your EC2 costs
Rightsize based on actual utilization
Save 20-50% mediumUse CloudWatch CPU, memory, and network metrics over 14+ days to identify instances that can safely drop to a smaller size. A t3.large running at 8% CPU can almost certainly become a t3.medium.
Schedule non-production environments
Save 60-70% easyAutomatically stop dev and staging instances outside business hours. If your team works 10 hours a day, 5 days a week, scheduling saves ~70% on those instances.
Upgrade to current-generation instances
Save 10-40% mediumCurrent-generation instance families deliver more compute per dollar. Graviton-based instances (the "g" suffix) offer up to 40% better price-performance than Intel equivalents.
Terminate idle instances
Save 100% easyIdentify instances with near-zero network traffic and CPU. If nobody has logged in or sent traffic to an instance in weeks, it can likely be terminated.
Purchase Reserved Instances or Savings Plans
Save 30-72% advancedFor steady-state workloads you know will run for 1-3 years, commit to Reserved Instances or Compute Savings Plans for significant discounts over on-demand pricing.
How ZapStack finds EC2 waste
ZapStack automatically scans your AWS environment and surfaces EC2 cost savings you can action immediately.
- Detects oversized instances based on CloudWatch utilization
- Identifies idle instances with near-zero traffic
- Flags previous-generation instance types
- Recommends scheduling for non-production environments
- Calculates per-instance savings potential
Frequently asked questions about EC2 costs
Related AWS services
EBS Cost Optimization
Elastic Block Store provides persistent block-level storage volumes for EC2 instances.
ELB Cost Optimization
Automatically distributes incoming traffic across multiple targets like EC2 instances and containers.
ECS Cost Optimization
Elastic Container Service runs and manages Docker containers on AWS using EC2 or Fargate.