As well as pricing their final product or implementations.for organizations, they need to know how much money they will pay in order to bay and implement a system such as SAP ERP . The problem with cost estimation is the organizations usually have no prior experience or enough knowledge to predict all the hidden costs associated with the implementation. In addition,even large and competent organizations suffer from faulty budget estimations when it comes to IT or IS projects. That is because cost factors are hard to identify and predict, especially the additional costs that may arise during the implementation research into the factory contributing to the total cost of ERP implementation has produced a list of cost drivers which influence the ERP project total implementation budget to a great extent these costs drivers are