Report Subscription as a service in Contracting Workforce Posted July 19, 2018 I deal with the Product or Service issue often in the context of contractually supporting a large scientific library used by our agency. A library that has lots of varying contractual agreements for data, publications, research support, etc. Some are product, some are service. However, most are subscriptions with PSC Code D317. The answer depends on the specifics, of course. But generally speaking... Outside of FAR, look at commercial billing practices. Is it FFP (probably product) or usage-based, like Labor Hour (probably service)? Pay in full at time of purchase (probably product) or in arrears (probably service).