Reference: Fataawa wa Rasaa.il Mukhtaarah – Page 501
Question: I work as an accountant at one of the companies, and I have a lot of spare time [at work], within which I read the Qur.aan and listen to the Qur.aan radio station; However, when the boss comes, I close the Qur.aan. So what is the ruling regarding this act? Guide us and may Allaah reward you with good.
Response: If you fulfill [the requirements of] your job in a complete manner, [such] that you fulfill all the duties required by your boss without delay, then it is permissible for you to read.