The paper investigates the possibility of consumer side resource accounting of cloud services, meaning, whether it is possible for a consumer to independently collect all the resource usage data required for calculating billing charges for pay-per-use cloud services. The accounting models of two widely used cloud services are examined and possible sources of difficulties are identified, including causes that could lead to discrepancies between the metering data collected by the consumer and the provider. The investigation is motivated by the fact that cloud service providers perform their own measurements to collect usage data, but as yet there are no equivalent facilities of consumer-trusted metering that are commonly provided by utility service providers like gas and electricity. The paper goes on to suggest how cloud service providers can improve their accounting models to facilitate the task of consumer side resource accounting.