Abstract: Various technologies related to estimating costs associated with proposed information technology services solutions using global sourcing are described. Consistent and accurate estimates can be achieved by using a tool having features specific to the estimating process. The tool can construct a global sourcing business case illustrating savings if the proposed solution were to be adopted. A wide variety of features related to solution parameters, costs, competitor analysis, transition billing, blended rates, business cases, and cumulative savings graphs can be supported. Superior, credible proposals can be generated that address the practical and financial demands of clients.