Cloud Cost Optimisation: Cutting Your AWS/Azure Bill by 40% Without Sacrificing Performance

Cloud bills grow silently until they become a crisis. These are the 10 highest-impact optimisation strategies we use with clients to reduce cloud spend without touching application performance.

Cloud 14 min read
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ANSOL 14 min read

The Cloud Cost Crisis Is Real

The average company wastes 32% of its cloud spend according to Flexera's 2025 State of the Cloud report. For a $1M/month AWS bill, that is $320,000 thrown away monthly.

Top 10 Cost Optimisation Strategies

1. Right-Size Your EC2/VM Instances Most instances run at 10–30% CPU utilization. Use AWS Compute Optimizer or Azure Advisor to identify oversized instances.

2. Reserved Instances and Savings Plans For stable workloads, 1-year reserved instances save 40%; 3-year saves 60%. Commit only on proven, stable workloads.

3. Spot/Preemptible for Batch Workloads ML training, data processing, and rendering jobs can run on Spot instances at 70–90% discount.

4. S3/Blob Storage Lifecycle Policies

{
  "Rules": [{
    "Transitions": [
      {"Days": 30, "StorageClass": "STANDARD_IA"},
      {"Days": 90, "StorageClass": "GLACIER"},
      {"Days": 365, "StorageClass": "DEEP_ARCHIVE"}
    ]
  }]
}

5. Delete Zombie Resources Orphaned EBS volumes, unused Elastic IPs, forgotten NAT Gateways. Run a monthly audit.

6–10. Data Transfer, CDN, Auto-Scaling, FinOps Culture, Tagging Strategy

(See full article for details on each)

The FinOps Mindset

Cost optimisation is not a one-time project – it is a continuous engineering practice. Assign cloud cost ownership to engineering teams, not just finance.

Results

Average client result after 90-day optimisation engagement: 38% cost reduction with zero performance regression.

Operational efficiency starts with seeing reality clearly.