In order to enhance our understanding of interindividual differences in academic motivation, the present study examined the interplay of personality, psychosocial adjustment and socio-academic factors in a subsample of adolescent students identified as teacher-and-peer-independent motivation type (MT) (N = 295; M Age = 13.71) in Brandenburg, Germany. A latent structural equation model was run in order to test whether psychosocial adjustment mediates the association between personality and socio-academic factors. The results revealed that psychosocial adjustment fully mediates the associations between personality and socio-academic factors. Additionally, results showed that neuroticism is a strong predictor of socio-academic difficulties. The findings could be integral of supporting students on a more individualized level.