A sub (abbreviation for subaccount) must be defined per project. Subs are added from the budget tab of the project screen.
Subs can be set up to receive allocations at either the sub level or the type level (in this case ‘type’ is referring to ‘Cost Types‘).
Subs are generally set up similarly throughout an organization, so the budget tab on the project setup screen will allow users to either select from a drop-down list or enter text when defining a sub.
Subs must have an associated cost type.