Autonomous learning is a study skill that may be challenging not only to learners with a dependent learning style but also to teachers used to teacher-oriented methodology. However, the considerable shift in the teaching and learning paradigm especially after the 2020 pandemic has made autonomous learning a must-gain skill. This research aimed to explore EFL teachers' perceptions of learner autonomy (LA), their actual practices, and the challenges of LA promotion at Omani secondary schools. It also investigated possible associations between teachers' beliefs about promoting LA and their academic level, gender, and years of experience. Within a convergent mixed-method parallel design, thirty Omani EFL school teachers were selected through convenience sampling to participate in the study. The instruments included teachers’ perceptions questionnaire, classroom observation data, and interviews with teachers. Frequency counts, ordinal regression analysis, and grounded theory were used to analyze the quantitative and qualitative data. The results revealed that although EFL teachers at Omani secondary schools practice some strategies that promote learner autonomy, these practices are not intentionally and exclusively implemented for LA purposes. Moreover, the results showed some discrepancies between teachers’ beliefs and their actual practices of LA due to some constraints and challenges such as the intensive English curriculum, teachers being overloaded with numerous school tasks besides teaching, learners' limited exposure to English outside the classroom, and teachers' inadequate professional background in the concept, principles, and practices of learner autonomy. No significant association was found between the teachers' general beliefs about LA and their particulars. It may be argued that the concept of autonomous learning and strategies to promote LA should be included as a core component of teacher training programs. By the same token, more self-study and self-assessment practices may be added to the English course materials in schools to help learners develop this essential skill for their higher education. Manuscript profile