Motivation is a core element of teachers' professional competences and, therefore, of great importance to teaching and learning. Motivation might explain why teachers do or do not promote self-regulated learning (SRL). Drawing on expectancy-value theory (EVT), this study used a person-centred approach to investigate to what extent multiple motivational aspects (self-efficacy; intrinsic interest, extrinsic utility, and attainment value; opportunity and effort costs) shape teachers' motivational profiles. It examined the extent to which those profiles differ regarding experience in promoting SRL, the implicit theory of SRL, and the promotion of SRL. The study sample consisted of N = 280 in-service teachers (51.8% women; M[subscript age] = 44.34, SD = 10.82). Three profiles were identified: The high costs profile (profile 1, 30.8% of teachers), the moderate profile (profile 2, 24.4% of teachers), and the high success expectations and task values profile (profile 3, 44.8% of teachers). Further analyses revealed significant differences between these profiles concerning experience in promoting SRL, implicit theory of SRL, and the promotion of SRL, with Profile 1 showing the lowest values and Profile 3 the highest for each factor. The study found that high expectations are associated with high values, and costs are low when expectations and values are high and vice versa. This is in line with the assumptions of EVT and is applicable to all three profiles. These results indicate a clear need to support teachers in promoting SRL, especially those with high perceived costs, to ensure costs do not override the other considerations in EVT. Overall, this study is 'frontline' because it highlights the relevance of motivation as an aspect of teachers' professional competences in promoting SRL. Furthermore, this study emphasizes the importance of combining EVT and SRL to provide a more nuanced picture of teachers' motivation to promote SRL. It offers new insights that could influence the conceptualization of professional development programs for SRL