Abstract: In a communication-system infrastructure usage measurement system and related methods with minimal overhead, message usage statistics are aggregated at a communication-channel level by emitter programs before sending them to a collector program upon an occurrence of an event. An example of an event is an expiration of a predetermined interval. In between event occurrences, message usage statistics are aggregated, and a summary message is transmitted to the collector at the next event occurrence. The collector program compiles the statistics and may generate billing information from the compiled statistics. The billing information may include charges associated with an entity that uses the infrastructure.