Techniques, including systems and methods, for virtual resource cost tracking account for unused capacity of implementation resources that is dedicated to particular customers and, as a result, is unusable for maintaining virtual resources for other customers. Customers requesting dedicated use of implementation resources are charged in a manner that compensates the virtual resource provider for the lost ability to use unused capacity of implementation resources to serve other customers. Customer charges may be determined by a pricing function that is calculated such that, for a base of customers, expected revenue from the base of customers approximates a revenue goal. The revenue goal may be determined based on revenue that would have been expected had the unused capacity of the dedicated implementation resources been available for serving other customers.