A method and system for data accounting across multiple communication networks are described herein. An enterprise data session request is received from a device configured to operate on a home communication network in which the device is associated with an enterprise. A usage amount can be determined for the session request, and it can be determined that the device is associated with the enterprise. In addition, the usage amount for the session request can be attributed to the enterprise. Another enterprise data session request can be received from a second device configured to operate on a second home communication network in which the second device is also associated with the enterprise. A usage amount can be determined for the session request from the second device, and it can be determined that the second device is associated with the enterprise. The usage amount for the session request from the second device can be attributed to the enterprise such that enterprise data usage accounting for different devices operating on different networks is enabled.