Systems and methods for managing multi-tenant callback services may be provided via a multi-tenant services integration platform. Several multi-tenant software as a service applications may be offered as a hosted software solution via the multi-tenant services integration platform. Various applications may deploy and support a shared tenant and shared services environment where there can be many different customers (companies and users) running in their own virtual partition from a single application instance. The applications may be multi-tenant aware and integrated into an administration portal which integrates several shared tenant services. The tenant model may allow for customized application configurations to be run from a single application instance. Further, improved methods for providing callback management, calculating estimated wait times, and providing for callback initiation may be integrated in such multi-tenant services.