GCP · Free tool
GCS storage class cost calculator
Plug in storage size, retention, operation volume, and retrieval. See Standard, Nearline, Coldline, and Archive side by side with the minimum-duration penalty applied. The cheapest class for archival data is usually wrong for warm data, and the math is what shows you which is which.
Cheapest class for this profile
Standard
$0/mo · $0/year
| Class | Storage | Operations | Retrieval | Penalty | Monthly |
|---|
Penalty column shows minimum-duration billing if your retention is shorter than the class minimum (30/90/365 days). Empty means retention covers the minimum.
When the cheap class is the wrong class
Three patterns dominate GCS audits. First, lifecycle policies that drop everything to Archive after 60 days, then a compliance review pulls the whole bucket and a quarter of Archive class A operations eat through the savings. Second, BigQuery export buckets on Nearline with a 14-day retention. The 30-day minimum doubles the actual storage spend. Third, dataflow temp buckets on Coldline, which is operationally cheap until a backfill rewrites every object and the class A bill pops.
Picking the right class depends on access pattern, retention, and whether you can tolerate retrieval-fee variance. The calculator covers the math; we cover the operational reality as part of the 14-day audit.
Run this on your real buckets
Free 14-day audit, read-only IAM role, one-page CFO summary.
We pull your actual GCS inventory, classify each bucket by access pattern, and recommend the class transitions that pay back. Including the ones that do not. Read-only, no card, the report is yours.
Frequently asked
Which GCS storage class is cheapest?
Archive at $0.0012 per GB-month, but only if you keep the data 365 days or more and read it almost never. Coldline at $0.004 per GB-month with a 90-day minimum is the next floor down for data you might need within seconds. Both have meaningful retrieval fees that can wipe out the storage savings on a single read-heavy month.
How does the minimum storage duration work?
Nearline bills 30 days minimum, Coldline 90 days, Archive 365 days. If you delete or transition before the minimum, GCS still bills you to the floor. A weekly backup retention on Coldline pays roughly 13x the storage you actually use, since you keep paying for 90 days every time you write a 7-day-retention object.
Are Class A and Class B operations the same as PUT and GET?
Roughly. Class A operations are mutating writes (create, update, delete via lifecycle, list), and they get more expensive on cold tiers (Standard $0.005 per 1,000, Archive $0.50 per 1,000). Class B operations are reads (GET, retrieve metadata), priced cheaper but still climb steeply on Archive ($0.05 per 1,000). The pricing structure punishes anyone who treats Archive like Standard.
Multi-region versus single-region pricing?
Multi-region (us, eu, asia) costs around 25% more on storage, but Class A and B operations are the same and you avoid cross-region egress fees if your workload spans regions. Single-region is cheaper at rest and the right call when your reads stay local. The calculator below uses single-region; multiply storage by ~1.25 for an approximation of multi-region.
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