Revenues Increasing the Budget 
Purpose
This component comprises the functions with which you can increase existing expenditure budget for particular functional areas due to
Additional revenues.Integration
In order for revenue postings to function as budget-increasing, you must use the Financial Accounting components G/L accounting and Accounts receivable accounting.
Features
Rules which define which share of a revenue should function as budget-increasing for which expenditures FM account assignment(s) form the basis.
The rule also determines the FM account assignment, the so-called surplus FM account assignment, into which residual revenues flow, which do not function as budget-increasing on the expenditure FM account assignments.
At the time of the customer invoice or not until the time of the incoming payment.