Copying Discount Groups 
The discount groups you have defined for a business partner (BP) can be copied to other business partners.
Procedure
Choose
Inventory 
Price Lists Special Prices Discount Groups 
.In the Discount Groups window, select a business partner.
Choose the Copy to Selection Criteria button.
The Choose Business Partner window opens.
In the Choose Business Partner window, specify business partners by entering a number range and choose the OK button.
Choose the OK button.