Parents and teachers play a key role in developing students' self-regulated learning (SRL), which is closely linked to academic achievement and acts as a protective factor for students from low socioeconomic backgrounds. Research has shown that authoritative parenting style, parental responsiveness, emotional warmth, behavioural control, and autonomy support are associated with better academic performance. In addition, studies have shown that the quality of the teacher-student relationship plays an important role in the development of SRL. However, there is limited research on the relationship between school and home environmental factors, student characteristics, and SRL, especially in primary school. The present study examined the relationship between parenting styles, teaching styles, student characteristics, and SRL. The sample included 328 ninth-grade students in Slovenian primary schools. SRL, parenting styles, and teaching styles were assessed using student self-reports. Using latent profile analysis, three subtypes of parenting styles (discipline-oriented parenting, democratic parenting, and responsive parenting) and three subtypes of teaching styles (autonomy-supportive teaching, diverse teaching, and directive teaching) were identified. Results indicate that students who perceive autonomy-supportive teaching and responsive parenting styles exhibit higher levels of SRL. Autonomy-supportive teaching was positively associated with student achievement. This study highlights the importance of an authoritative parenting and teaching style for the development of SRL in primary school.