This study investigates leaders' motivation to lead (MTL) as a personal resource for building a sustainable career as a leader. Using a person-centered methodology, we identified different latent profiles of leadership motivation. These motivational profiles were compared with leaders' occupational well-being and leadership-related career intentions, and with follower-rated leader behaviors and LMX relationship quality. The survey data consisted of 1003 Finnish leaders from various sectors of working life. Of these leaders, 233 recruited their followers to participate in this study, resulting in 987 follower participants. Latent Profile Analysis identified four distinctive MTL profiles: 1) Affective-Identity-based MTL (42%), 2) Low overall MTL (41%), 3) Low Affective-Identity and High Non-Calculative MTL (12%) and 4) High Affective-Identity and Social-Normative MTL (5%). Leaders in the profile with low affective-identity MTL and high non-calculative MTL experienced the poorest occupational well-being, were likely to resign from their current leadership position or apply for less challenging leadership positions, and received the most unfavorable assessments from their followers regarding their leader behaviors and LMX. Leaders whose motivation was based on high affective-identity and social-normativity had good occupational well-being and were most likely to pursue a more challenging career as a leader. To conclude, personal leadership motivation plays an important role in leaders' well-being and in their followers' satisfaction. Thus to create and support sustainable leader careers, both leader candidates themselves and practitioners in HRM and executive selection should consider the underlying motivational resources for leadership. This can help to better align individual careers with the employing organization and create better person-career fit.