Past and current attempts in digital transformation are enduringly changing business, requiring flexible strategic approaches and fast decisions. Companies seem to tend to rely on outsourcing for tackling this challenge. Consequently, companies need IT/IS outsourcing strategies fitting requirements. However, it remains unclear, how decisions on outsourcing contribute to strategic goals and supports successful digital transformation. Hence, in this study we aim at designing a model that enables companies to make their decisions in developing their outsourcing strategy considering digital transformation requirements. By adopting a design science approach, an artifact - the strategic outsourcing contribution (SOC) model - was developed and partially evaluated within one case company. The model provides a structured approach to the development of an outsourcing strategy by integrating transparent decision making. In addition, it provides mechanisms to assess the contribution of the model to strategic goals influenced by digital transformation initiatives and attempts.