G/L Allocation Setup CLICK on the DESIRED Overhead Group Button On the NEXT window select Help for more info. Should be performed MONTHLY after the month is closed, but may be run at the end of the current month. This provides the capability to allocate out expenses for various groups of overhead expenses that are not charged to a specific department, or it is desired to re-allocate the overhead differently than posted. The allocation is usually distributed according to departmental income less specified costs. The amounts are redistributed to a designated allocation account group consisting of an offsetting contra credit account, and corresponding departmental accounts which are debited by the Posting routine.