Cloud bills tend to grow quietly until someone finally looks closely at the invoice. Most AWS accounts we audit are overspending by 20-40%, and the fixes are usually straightforward once identified.
- Right-size EC2 instances based on actual CPU and memory utilization, not the size you guessed at launch
- Use Savings Plans or Reserved Instances for steady-state workloads instead of paying on-demand rates
- Move fault-tolerant, interruptible workloads to Spot Instances for up to 90% savings
- Set S3 lifecycle policies to automatically move cold data to cheaper storage tiers
- Delete unattached EBS volumes and unused Elastic IPs, which quietly accumulate charges
- Enable auto-scaling so you pay for capacity you actually need, not peak capacity around the clock
- Use a single NAT Gateway per availability zone instead of one per subnet where possible
- Turn off non-production environments outside of working hours
- Review data transfer costs, which are often the least visible line item on the bill
- Set up AWS Budgets and Cost Anomaly Detection so surprises are caught within days, not months
Make It an Ongoing Practice
Cost optimization is not a one-time cleanup — it is a habit. Reviewing cost reports monthly and tagging resources by team and project makes it possible to hold teams accountable for their own cloud spend and catch inefficiencies early.
