Cost S3 Cross-Region Replication on both sides: inter-region transfer, destination requests, storage and optional RTC.
Replication is billed on both sides of the wire: a GET and inter-region transfer leaving the source, a PUT landing in the destination, and then the destination storage forever afterwards. The recurring destination storage line grows with the whole replica, so it quickly dominates the one-off transfer charge for this month's delta. Replication Time Control adds a per-GB premium in exchange for a 15-minute SLA and replication metrics. All rates are user-supplied list prices to confirm on the AWS S3 pricing page for both regions. Teams budget CRR as a transfer cost and are then surprised by a permanent second copy of the bucket, which is the larger and more durable half of the bill.
Cross Region Replication
cost = replicated GB x transfer rate + objects ÷ 1000 x (GET + PUT) + destination GB x storage rate + optional RTC GB x RTC rate.
cost = replicated GB x transfer rate + objects ÷ 1000 x (GET + PUT) + destination GB x storage rate + optional RTC GB x RTC rate. Replication is billed on both sides of the wire: a GET and inter-region transfer leaving the source, a PUT landing in the destination, and then the destination storage forever afterwards. The recurring destination storage line grows with the whole replica, so it quickly dominates the one-off transfer charge for this month's delta. Replication Time Control adds a per-GB premium in exchange for a 15-minute SLA and replication metrics. All rates are user-supplied list prices to confirm on the AWS S3 pricing page for both regions.
Teams budget CRR as a transfer cost and are then surprised by a permanent second copy of the bucket, which is the larger and more durable half of the bill.
This calculator takes 9 inputs: New and changed data replicated per month, Objects replicated per month, Data already in the destination bucket, Inter-region transfer price, Source GET price, Destination PUT price, Destination storage price, Enable Replication Time Control, Replication Time Control price. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.
Not by default — CRR only applies to objects written after the rule is enabled. Existing objects need S3 Batch Replication, which is billed separately per object and per GB copied.