This multilevel study examines the psychological mechanisms (i.e., motivation and commitment) that might underlie the relationship between transformational leadership and job performance. Models were tested using the sample of teachers, n = 266 embedded in 55 teams from secondary schools in Malaysia. Using hierarchical linear modeling (HLM), we found that there was a cross-level effect of transformational leadership on motivation, commitment and performance. In conclusion, our finding proposes that transformational leadership is a vital organizational leadership style construct, and acts to enhance teachers’ performance via psychological boost.