Dynamically generating an aggregation routine

Example implementations relate to dynamically generating an aggregation routine. For example, a computing device may include a processor. The processor may receive a data record from a particular service source of a plurality of service sources in communication with the computing device. The data record may relate to usage of the particular service source. The processor may identify at least one field associated with the data record and convert the data record to a standardized record associated with metadata based on the at least one field. The standardized record may have a standardized record format. The processor may dynamically generate an aggregation routine based on the standardized record and the metadata associated with the standardized record. The aggregation routine may be used to calculate usage data associated with the usage of the particular service source.