Is one allowed to shave after shiva (7 days of mourning for deceased) if one is concerned about seeing clients at work? Most authorities say that one should wait 30 days before shaving.
This should answer your question:
The custom of refraining from haircuts during the sheloshim is generally applied even to shaving, but there is some room to distinguish between them, because shaving (which is done daily) does not involve the festive nature of a haircut.
In addition, it is possible that reasons of losing one’s parnasah will be sufficient to waive the custom, as we find in a number of poskim concerning Sefiras Ha-Omer (see Kaf Ha-Chaim 493:19; Iggros Moshe Orach Chaim 4:102).