I work for a "bulge bracket" IB in New York (please note I point this out to show relevance, not bravado), so let me add some color to the conversation. It would be easier if you gave your position, but here's my opinion: Analyst/Associate: Presuming business casual: nice grey and navy slacks. Feel free to wear any brand you want, as no one can tell anyway if you're not wearing a suit. Regarding shirts, depends on the firm, but you actually have a lot of flexibility. Again, feel free to wear any brand you want, as no one can tell the difference (just avoid "aggressive" patterns/colors - no club attire please). Contrary to the sartorial tastes of many on this forum, french cuff shirts with silk knots (or real links) are completely appropriate with slacks alone, and are in fact common. If you're business formal, the key is again conservative PATTERNS/COLORS moreso than anything else. If you want to get MTM/bepoke/whatever, go for it. The key is not to stand out in a bad way. 90% of bankers will not know a plain navy brioni from a brooks. The 10% who do recognize it share a common interest with you and you can bond over your taste (this has happened to me when I was an analyst and again recently, as an associate -- we ended up discussing tailoring choices). Small touches like working buttons apply similarly - only those interested in fine attire will notice them when they see him. One thing to avoid is lapel pick-stitching and ticket pockets as they're somewhat obvious and too much for a junior banker. Again, to reiterate, the cut, brand, etc do not matter so long as you choose an appropriate pattern and color (navy, charcoal, navy/charcoal pinstripe are about it). If you're a VP/Director/Managing Director (or in Europe): None of the above applies, do whatever the heck you want.