The main purpose of the present research was to propose and test a motivational model linking achievement goal approach and self-determination theory. First, the effects of performance-approach goals and the autonomous and controlling reasons underlying their pursuit on well-being were investigated. Second, the mediating variables (i.e., effort, goal attainment, need satisfaction, and thwarting) at play in these relationships were examined based on the self-concordance model (Sheldon & Elliot, 1999). The model was tested in two studies in educational and work settings using cross sectional (Study 1) and prospective designs (Study 2). The present results revealed that considering autonomous and controlled regulations underlying performance-approach goals predicted well-being above and beyond the strength of performance-approach goals. Moreover, the mediational sequence based on the self-concordance model was supported in both studies. Theoretical implications and directions for future research are discussed.