Can you explain the difference between Central Service Costs and Indirect Costs?

Generally, central service costs benefit a certain group of programs or units whereas indirect costs benefit the organization as a whole. Often, particular services are common to both categories, and some part of the total costs may be included in the central services costs and the remainder included in the indirect costs. The costs cannot be duplicated and the allocation of indirect costs or central service costs must not result in an over-recovery of cost.