We work as carpenters for a company

A: It is not permissible for you to make posters and advertisements for bars and musical bands, because this is a form of helping them to continue their prohibited work. Allah (Glorified and Exalted be He) forbids Muslims to cooperate in sin. Allah (Exalted be He) says: Help you one another in Al-Birr and At-Taqwâ (virtue, righteousness and piety); but do not help one another in sin and transgression. And fear Allâh. Verily, Allâh is Severe in punishment. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.