Australia is the fourth most popular destination for Saudi Students. The success of those students is an important issue for them, the Saudi Government, and of Australian universities. Pre-entry factors influence students' effectiveness through their influence on learning process and achievement. The study concentrated on Saudi Master Students and aims to investigate to what extent do pre-entry factors directly influence Saudi international Master's students' outcomes as interpreted by Degree Grade Point Average (GPA), student's completion period, and overall satisfaction? Through a review of the literature, the main pre-entry factors that were likely to influence the success of international graduate Master students were deduced; they are: gender, age, marital status, IELTS score, length of time studying English in Australia, Bachelor's GPA. A questionnaire was administered to gain data about respondents' backgrounds (factors obtaining prior to educational processes, called pre-entry factors); and educational outcomes factors (Master's GPA, extension of completion the degree and satisfaction of Master course). 502 were collected. A Multiple Regression Analysis was used to investigate the predictive powers of pre-entry factors on process factors and educational outcomes. Semi-structured interviews were conducted with six students to provide more explanation. The study reveals that pre-entry factors explained a third of the variation in the Master's GPA and more than a quarter of the variation in extensions requested and in students' satisfaction in their research abilities. The IELTS score was the most important pre-entry factor, followed by the relevance of the Master's major to the Bachelor's major and the Bachelor's GPA.