Does listening to music or any other forbidden thing while working make the money earned from it unlawful?

The permissibility of money earned from a job depends on the ruling concerning the job itself. If the job is permissible, then the money earned from it is permissible. Listening to forbidden songs while performing a permissible job does not render the money earned from it unlawful. There is a distinction between the prohibition of listening to songs and the money earned from the work, unless the money is earned in exchange for listening to forbidden songs; in that case, it is deemed unlawful.