Cloud Cost Optimization: How to Stop Overspending on AWS, Azure, and Google Cloud

# Cloud Cost Optimization: How to Stop Overspending on AWS, Azure, and Google Cloud

Cloud computing is supposed to save money — but unmanaged cloud environments routinely cost 30-50% more than necessary. The pay-as-you-go model that makes cloud attractive also makes waste invisible until the monthly bill arrives.

## The Most Common Cloud Cost Mistakes

### 1. Oversized Instances

The #1 source of cloud waste. Developers provision large instances "just in case" and never right-size them.

### 2. Zombie Resources

Resources that no longer serve a purpose but continue to run and incur charges:

• **Unattached storage volumes** — EBS volumes, Azure Disks left behind after instance deletion
• **Old snapshots** — Database and VM snapshots accumulating without a retention policy
• **Idle load balancers** — ALBs/NLBs with no targets or zero traffic
• **Unused elastic IPs** — AWS charges for unattached Elastic IPs
• **Development/test environments** — Left running 24/7 when only needed during business hours

### 3. No Reserved Capacity

On-demand pricing is 40-60% more expensive than reserved capacity for predictable workloads.

| Commitment Level | Typical Savings | |-----------------|-----------------| | On-demand (no commitment) | 0% (full price) | | 1-year reserved / savings plan | 30-40% savings | | 3-year reserved / savings plan | 50-60% savings | | Spot instances (interruptible) | 60-90% savings |

### 4. Storage Tiering Neglect

Most businesses store everything in the most expensive storage tier:

| AWS S3 Tier | Monthly Cost per TB | Best For | |------------|-------------------|---------| | S3 Standard | ~$23 | Frequently accessed data | | S3 Infrequent Access | ~$12.50 | Data accessed < 1x/month | | S3 Glacier Instant | ~$4 | Archive with immediate access | | S3 Glacier Deep Archive | ~$1 | Long-term compliance archive |

Moving compliance archives and old backups to lower tiers can cut storage costs by 80-90%.

### 5. Data Transfer Costs

Cloud data transfer (egress) costs are often overlooked:

• **Egress charges** — AWS charges $0.09/GB for data leaving a region
• **Cross-region traffic** — Replicating data between regions doubles transfer costs
• **CDN optimization** — CloudFront/Azure CDN pricing is lower than direct S3/Blob egress

## Building a Cloud Cost Management Practice

### Step 1: Visibility

You cannot optimize what you cannot see. Implement: - **Cost allocation tags** — Tag every resource with owner, project, environment (prod/dev/test) - **Monthly cost review** — Review cloud bills monthly with the responsible team - **Budget alerts** — Set alerts at 80% and 100% of expected monthly spend

### Step 2: Governance

Prevent waste before it happens: - **Instance size standards** — Define approved instance sizes per workload type - **Auto-shutdown for dev/test** — Schedule non-production environments to stop evenings and weekends (saves 65% on those resources) - **Approval process for new resources** — Someone must approve resources above defined thresholds

### Step 3: Continuous Optimization

Make optimization ongoing, not one-time: - **Quarterly right-sizing review** — Adjust instance sizes based on actual utilization data - **Annual reserved capacity review** — Evaluate and renew reserved plans based on current usage - **Storage lifecycle policies** — Automate tier transitions based on access patterns - **Monthly zombie audit** — Terminate unused resources

## Managed Cloud = Optimized Cloud

Managing cloud costs requires constant vigilance. Summit DNC provides managed cloud services that include cost optimization as a standard practice — we monitor utilization, right-size resources, implement reserved capacity plans, and ensure you are only paying for what you actually use.