Which role authorizes budget for a service in a service relationship?

In a service relationship, the "Sponsor" is explicitly defined by the ITIL framework as the role responsible for authorizing the budget for service consumption. Service management clearly distinguishes between the different consumer roles to ensure proper accountability. While the customer defines the requirements and takes responsibility for the outcomes, and the user interacts with the service on a day-to-day basis, the sponsor provides the financial backing and approval. This separation of roles allows service providers to accurately target their communications regarding financial approvals, contract negotiations, and funding directly to the sponsor.

A. Customer: The customer defines the requirements for a service and takes responsibility for the outcomes of service consumption, but does not inherently authorize the budget.
B. User: A user is the individual who actively uses the IT service on a day-to-day basis; they have no financial or budgeting authority in this context.
D. Product vendor: A product vendor supplies external goods or services to the organization; they are the recipients of the financial compensation rather than the internal budget authorizers.

1. AXELOS / PeopleCert. (2019). ITIL Foundation: ITIL 4 Edition. TSO (The Stationery Office).

Reference details: Chapter 2 (Service Management Concepts), Section 2.2.2 (Service consumers), Table 2.1 (The service consumer roles), Page 13. (Note: This is the current official PeopleCert standard defining the Sponsor role as "A person who authorizes budget for service consumption").

2. Stanford University IT (UIT). IT Service Management (ITSM) and ITIL Concepts.

Reference details: Service Strategy and Consumer Roles module. Defines the distinct separation of duties between Users, Customers, and Sponsors regarding financial authorization.