For a Bain interview, a suit or equivalent professional business attire remains the lowest-risk choice unless the recruiter explicitly gives a different dress code.

Start with versatility. Two or three pairs of trousers, several tops or shirts, one good blazer, comfortable professional shoes, and a bag that works for commuting or travel can cover a surprising number of situations.

In many offices, normal days are closer to polished business casual than full suits. Think chinos or wool trousers, button-downs or polos depending on the office, a few knit layers, and clean leather shoes or other office-appropriate footwear.