What 100 TB/mo of Google Cloud egress actually costs
TL;DR. Moving 100 TB/mo of network egress from Google Cloud to the internet, Premium Tier (across services) costs about $8,509/month — roughly $102,113/year — in transfer fees alone, before you pay for storage, requests, or any NAT-gateway / cross-AZ traffic. That's a blended $0.083/GB. The same 102,400 GB cost $0 on Cloudflare R2, because those targets don't meter egress the way AWS does.
The worked calculation
Google Cloud bills data transfer in binary gigabytes (1 TB = 1,024 GB), and the rate is tiered — the first block is the priciest, then it steps down. For 102,400 GB:
| Tier | Data | Rate /GB | Cost |
|---|---|---|---|
| First 1 TB | 1,024 GB | $0.120 | $123 |
| 1–10 TB | 9,216 GB | $0.110 | $1,014 |
| Over 10 TB | 92,160 GB | $0.080 | $7,373 |
| One month | 102,400 GB | ~$0.083 blended | $8,509 |
Google Cloud's first 200 GB/mo of egress is free; it's immaterial at this scale and is omitted above (the figure is intentionally the conservative, un-discounted rate).
The same 102,400 GB on infrastructure that doesn't meter egress
| Where it's served | Egress / month | Notes |
|---|---|---|
| Google Cloud → internet | $8,509 | The metered, tiered rate above. |
| Cloudflare R2 | $0 | No egress fees; S3-compatible. Storage billed separately (~$15/TB-mo). |
| bunny.net CDN | $512–$1,024 | Volume-network pricing, ~$0.005–0.01/GB; excellent for media. |
| OVH / Hetzner flat box | $0 | Generous-to-unlimited transfer included; dedicated boxes are unmetered. |
The honest footnote. This compares egress only. R2 and B2 still charge for storage (~$15/TB and ~$6/TB per month); a flat box still costs rent plus the time to run it. Egress is simply the line where AWS's markup is most extreme and most avoidable — which is why it's usually the first thing worth moving.
What 100 TB/mo actually is
102,400 GB of egress in a month is, concretely, any one of:
- ~34,133 hours of 1080p video streamed (≈3 GB/hour)
- a 100 MB app/dataset downloaded ~1,024,000 times
- a ~2 MB web page served ~51,200,000 times
- a 50 MB podcast episode delivered ~2,048,000 times
When this is genuinely fine (don't move it)
- In-region consumption. If these bytes are read by other Google Cloud services in the same region rather than sent to the internet, you're not paying the egress rate — the fix is a free private-network endpoint, not a migration.
- Spiky, unpredictable traffic that genuinely benefits from scale-to-zero and global presence.
- Small and flat. A few hundred GB a month is a small bill; a migration won't pay for itself.
Related
- the full Google Cloud egress breakdown — the per-GB tiers and every scale from 1 TB to 500 TB.
- The same service at other scales: 1 TB/mo, 5 TB/mo, 10 TB/mo, 50 TB/mo, 500 TB/mo.
Sources
- Google Cloud network egress (internet, Premium Tier) pricing — ~$0.12/GB first tier, 200 GB/mo free — cloud.google.com/vpc/network-pricing
- Alternative pricing (Cloudflare R2 zero egress, bunny.net ~$0.005–0.01/GB, OVH/Hetzner included transfer): the respective provider pricing pages.