☁️ AWS Egress Bandwidth Cost Estimator
AWS egress pricing tiers: first GB free, then $0.09/GB, $0.085/GB, $0.07/GB as volume scales. The line item nobody reads until the bill crosses $10K. At 50 TB/month: $4,500 on AWS, $4,250 on GCP, $4,350 on Azure. The spread looks small until you multiply by 12 months. Model your outbound volume across all three clouds.
📊 Egress Configuration
Enter monthly outbound TB and per-GB rate. The engine computes AWS tiered pricing (free → $0.09 → $0.085 → $0.07/GB) and side-by-side GCP/Azure comparison. US East ~$0.09, APAC ~$0.12 — region matters.
AWS Data Transfer Cost: The 25 TB Egress Trap Costs ~$2,100/Month
AWS data transfer egress pricing follows a volume-based tiered model where the per-GB rate decreases as monthly usage increases — but the cumulative cost still scales linearly within each band. For a workload pushing 25 TB/month (25,000 GB) out of AWS, the egress bill alone can reach ~$2,100/month before accounting for compute, storage, or support costs. This calculator models the exact tiered pricing formula to surface your actual data transfer expenditure.
How AWS Tiered Egress Pricing Works
AWS divides monthly outbound data transfer into four pricing tiers, applied cumulatively:
| Tier | Monthly Volume (GB) | Rate ($/GB) | Discount vs. Base |
|---|---|---|---|
| Tier 1 | 0 – 10,000 | $0.09 | 0% (base rate) |
| Tier 2 | 10,001 – 40,000 | $0.085 | ~6% off |
| Tier 3 | 40,001 – 150,000 | $0.07 | ~22% off |
| Tier 4 | 150,001+ | $0.05 | ~44% off |
The trap: the first 10 TB always costs the full base rate. If your workload is 11 TB, only the last 1 TB gets the Tier 2 discount — the first 10 TB is billed at $0.09/GB regardless. This means apparent "discounts" are marginal until you cross deep into Tier 3 or Tier 4 territory (40+ TB/month).
Mitigation Strategies: Reducing Your AWS Egress Bill
Amazon CloudFront CDN: Route outbound traffic through CloudFront. CloudFront offers 1 TB of free data transfer per month and charges $0.085/GB for the next 10 TB in the US — often cheaper than direct S3/EC2 egress. Plus, origin shield reduces requests hitting your origin servers, cutting egress further.
VPC Endpoints and PrivateLink: Use VPC endpoints (Gateway endpoints for S3/DynamoDB are free) to keep traffic within the AWS backbone instead of traversing the public internet. VPC Interface endpoints cost ~$0.01/hour plus $0.01/GB — but they eliminate NAT gateway charges ($0.045/GB) for cross-AZ traffic.
AWS Direct Connect: For hybrid cloud or on-premises data transfer, Direct Connect provides dedicated physical connections with egress rates as low as $0.02/GB — dramatically cheaper than public internet egress. The tradeoff is a fixed port-hour cost plus the physical cross-connect installation.
Multi-Cloud Arbitration: GCP charges ~$0.085/GB flat (no tiering) and Azure charges ~$0.087/GB for the first 10 TB. For certain volume bands, routing egress through a different cloud provider's network can reduce total cost — this calculator surfaces the cross-provider comparison so you can make an informed architectural decision.