According to one aspect of the present disclosure, a system and technique for capacity forecasting is disclosed. The system includes a host having a processor unit and a memory. Resource data stored associated with an environment is stored in the memory, the resource data comprising inventory information of applications, processing resources and storage resources of the environment. A ledger module is executable by a processor unit to: create a capacity-associated transaction; identify and link at least one of an application, processing resource and storage resource to the transaction from the resource data; determine an initiation time and duration associated with the transaction; and forecast a change in capacity of at least one linked storage resource for the transaction and a time of the change in capacity.