Using Billable Charges
Bill segments for billable charge service agreements have both their start and end dates defined on the respective billable charge.
Fastpath: 
For more information about billing billable charges, refer to How To Create A One-Time Invoice . For more information about creating a billable charge, refer to Maintaining Billable Charges. For more information about interfacing a billable charge from an external system, refer to Uploading Billable Charges .
The service agreement's SA type indicates if the service agreement uses this method, and if so, the billing frequency.
Fastpath: 
For more information about the SA Type attributes that control this method, refer to Setting Up SA Types.