Using work on self-concepts and Conservation of Resources theory, the present research examined the motivational underpinnings of continuance commitment's subcomponents of perceived sacrifice and few alternatives. Study 1 (N=208) found job scope to be positively related to perceived sacrifice commitment, and negatively related to few alternatives commitment. Study 2 (N=147) found empowerment's meaning dimension to be positively related to perceived sacrifice commitment and self-determination to be negatively linked to few alternatives commitment. In Study 3 (N=301), perceived sacrifice commitment was found to be positively related to feedback seeking, while few alternatives commitment was negatively related to it. Finally, Study 4 (N=278) found perceived sacrifice commitment to be positively, and few alternatives commitment negatively, related to career success (promotion and pay raise decisions). Implications of these findings are discussed. (Contains 8 tables.)