The aim of this paper is to examine the significance of English language proficiency standards in fostering academic and career success in Iran. The development of English language proficiency is intricately linked with the needs of Iranians for achieving their academic and professional goals. Notably, there is a growing interest in learning English language in Iran, like in the other countries, since it lies in the fact that English language, as a globalized language, plays a pivotal role in both academic achievement and career advancement. The study first delves into the English language proficiency standards, which include five levels, illustrating the diverse abilities exhibited by English language learners within each language proficiency level. Second, it explores the factors which have tremendous impacts on academic and career success in learning English language, with the aim of maximizing the effectiveness of English language learning for English language learners. Furthermore, it highlights the extensive array of English training courses available in Iran, conducted in educational institutions, which contribute significantly to enhancing English language proficiency among learners and optimizing English language learners’ perspective on the English language. Finally, the outcomes of this investigation indicate that the number of interested English language learners in Iran has been increasing in recent years, as they demonstrate a profound awareness and a deeper understanding of the global significance of the English language and recognize its transformative effects on their academic and professional success, thereby opening up vast opportunities for international communication and engagement.