Data Residency Replication Premium Calculator

Estimate the premium you pay to meet data residency mandates by comparing your baseline single-region storage bill with multi-region replication and required inter-region egress. Tune the optional egress rate to mirror your cloud provider's pricing, private connectivity discounts, or data transfer commitments.

Logical dataset size that must remain in compliance-approved regions, measured in terabytes.
Number of distinct geographic regions or sovereign clouds required by regulation or client contracts.
Monthly object storage rate for a single copy of the dataset in your primary region.
Average inter-region transfer volume per terabyte of stored data to keep replicas in sync.
Optional — defaults to $54.00 per TB when blank to approximate hyperscaler inter-region data transfer rates.

Actual cloud invoices may vary with tiered pricing, reserved capacity, or provider-specific minimums. Validate cost assumptions against your vendor agreement before budgeting.

Examples

  • Example 1 — 20 TB dataset, 3 regions, $18.00 storage, 0.20 TB egress per TB (defaults) ⇒ Per-region storage spend: $360.00 | Monthly replication premium: $936.00 | Annual compliance uplift vs single region: $11,232.00
  • Example 2 — 12 TB dataset, 2 regions, $22.00 storage, 0.15 TB egress per TB, $132.00 egress rate ⇒ Per-region storage spend: $264.00 | Monthly replication premium: $501.60 | Annual compliance uplift vs single region: $6,019.20

FAQ

How can I compare warm versus cold storage classes?

Re-run the calculator with each storage class price and egress rate so you can weigh retrieval charges against lower ongoing storage fees for archival tiers.

Does this include write amplification or snapshots?

No. Add extra terabytes to the dataset input to approximate snapshots, versioned objects, or write amplification overhead in multi-region designs.

Where do compute and key management costs fit?

Layer KMS, HSM, sovereign cloud surcharges, or compliance attestations into the monthly premium by adding their totals to the output so the ROI reflects all residency-driven expenses.

Can I test hybrid architectures?

Yes. Reduce the region count and adjust the egress assumption to mimic on-prem plus cloud splits, then compare against the full cloud replication result to evaluate hybrid costs.

Additional Information

  • Single-region storage establishes the benchmark monthly cost without residency replication.
  • Replicated storage multiplies the dataset size and base rate across every compliance-approved region.
  • Storage premium reflects the incremental spend attributable solely to additional regional copies.
  • Inter-region egress cost prices the ongoing synchronization bandwidth between compliant locations.
  • Annual uplift multiplies the monthly premium by twelve to highlight yearly compliance-driven spend.

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