| Billing Class | Description |
| Session | Tracks when a Notes session starts or ends, and when any ongoing activities, document editing, or replication occur during the session. |
| Database | Tracks when users or servers open and close a Notes database and the duration of use. |
| Document | Tracks read and write activity for specified documents only using $ChargeRead and $ChargeWrite fields on a document. |
| Replication | Tracks when a billing server initiates replication with another server or a workstation. |
| Mail | Tracks when a billing server mail router transfers messages to another Domino server. |
| Agent | Tracks when users or servers run a scheduled agent on a server and the elapsed run time of the agents. |
| HTTPRequest (New for 4.6) | Tracks Web Server requests |
