The paper presents a research model and a measurement instrument for a research-in-progress study on the antecedents of success in IS offshoring projects. In this empirical-confirmatory study, we intendto analyse the impact of the constructs “offshoring expertise”, “trust in offshore service provider”, “project suitability”, “knowledge transfer”, and “liaison quality” on offshore project success. Constructs and indicators are derived from an extensive literature review. We plan to formulate astructural equation model and to test it using partial least squares (PLS) as an analysis technique. Our research model addresses the paucity of research that quantitatively examines offshoring success.