Average revenue per user (sometimes average revenue per unit) or ARPU is a measure used primarily by consumer communications and networking companies It is known to be the total revenue divided by the number of subscribers.
This term is used by companies that offer subscription services to clients and hosts. It is a measure of the revenue generated by one customer phone, pager, etc., per unit time, typically per year or month. In mobile telephony, ARPU includes not only the revenues billed to the customer each month for usage, but also the revenue generated from incoming calls, payable within the regulatory interconnection regime. This measure does not count collected taxes , only revenues.