# Monitoring upgrades
<a name="monitoring-upgrades"></a>


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|  Applies to:  Enterprise Edition  | 


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|    Intended audience:  System administrators and Amazon Quick administrators  | 

Administrators can monitor user upgrades through:
+ **CloudTrail logs** — Provides audit trails of all upgrade requests and approvals.

## Billing considerations for administrators
<a name="billing-considerations"></a>
+ Users are billed for their highest license tier within each billing period.
+ **Prorated Billing:** When you upgrade a user subscription in Amazon QuickSuite, billing is prorated for the month of the upgrade. This means:

  If you upgrade from BI Reader ($3/month) to Professional ($20/month), you're billed at the $20/month rate from the time of upgrade until the end of that billing month.

  If you then upgrade again from Professional ($20/month) to Enterprise ($40/month) within the same month, you're billed at the $40/month rate from that second upgrade time until the end of the month.