What is the dress code for IB interviews in Frankfurt, Zurich, Munich, and Vienna?

conservative business formal.

dark navy or charcoal suit, white or light-blue shirt, conservative tie, dark polished leather shoes, minimal accessories.

dark suit or conservative business dress / separates, blouse, professional shoes, minimal accessories.

• Frankfurt: standard formal banking dress.
• Zurich: often slightly more conservative; dark colors and restrained styling.
• Munich: still formal, but some boutiques may feel slightly less rigid.
• Vienna: traditional formality; polished and conservative is safest.

black funeral-style suit unless styled carefully, loud ties, flashy watches, strong perfume, sneakers, casual bags, and anything that becomes the thing the interviewer remembers.

You should look like someone who can be put in front of a client that afternoon.