When to Process Intercompany Billing
In general, you process Intercompany Billing whenever you want to assess the Income Statements of your companies.
For example, if the managers in your firm want to see Income Statements on a weekly basis, then you must process Intercompany Billing weekly, because processing Intercompany Billing can affect profit and loss figures. If you have users who access Income Statements throughout the accounting period, you would process Intercompany Billing after every timesheet posting (at a minimum).
Deltek recommends that you process Intercompany Billing once a month, perhaps as part of your usual month-end procedures. Note that if you make any last-minute adjustments to labor or expenses that affect intercompany transactions, you must process Intercompany Billing again to get accurate data.