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Server Migration Center:Billing

Last Updated:Jun 02, 2026

SMC is a free service, but ECS resources used during migration incur charges.

The following table lists the billable items and billing methods for server migration.

Billable item

Description

Billing method

References

ECS instance (intermediate instance)

The system automatically creates an intermediate instance during migration and releases it after migration completes.

Important

If a migration task is incomplete (failed or paused) and has not expired, the intermediate instance is retained and incurs fees. Delete the task to release the instance and stop charges.

Pay-as-you-go

Pay-as-you-go

Disk

The system attaches an intermediate disk to the intermediate instance during migration. The disk is released with the instance after migration completes.

Note

Releasing the intermediate disk does not affect the source system.

Pay-as-you-go

Pay-as-you-go

Snapshot

The system creates an intermediate snapshot from the intermediate instance to generate an image during migration.

Pay-as-you-go

Note

Snapshot fees are based on size and storage duration. The default billing method is pay-as-you-go.

Snapshot billing

Public bandwidth

If you use the public network for migration, data transfers from the source server to the intermediate or destination ECS instance. Migration traffic is primarily inbound and free of charge.

Free of charge

None

Custom image

A custom image is created from a snapshot during migration.

Free of charge

None