Apparatus, methods and computer programs provided for metering and accounting in a commercial e-services infrastructure address the requirement for handling composite services in which higher-level services are built using simpler underlying services, each of which may be autonomously owned and operated. Metering records for each service underlying a composite service are correlated by a process associated with the composite service, and then sent to an accounting service where they can be aggregated. The correlation is performed in a distributed manner with correlated usage data provided on a per-request basis. Accounting services can take account of the usage and charges associated with the underlying services to provide accounting and billing on a per-request basis or per customer-provider pair for a billing period.