Business casual, finally defined: the complete guide
Business casual means different things at a bank and a startup, which is why nobody can define it. But underneath the variation there is a stable core: dressed up enough to respect the room, relaxed enough to skip the suit. Here is the working definition.
The core formula
Business casual is: tailored trousers or chinos, a collared shirt or polished knit, leather shoes, no tie required, blazer optional. For women: trousers, skirts, or a dress with structure; a knit or blouse on top; flats, loafers, or low heels. Everything pressed, nothing faded, nothing that could go straight to the gym.
What's in
Chinos and dress trousers in any sober color. Button-downs, oxfords, and fine knits (merino crew, polo in a quality knit). Loafers, derbies, chelsea boots, clean minimal leather sneakers at most modern offices. Blazers and unstructured jackets. Dark, unripped, well-fitting jeans at the casual end - with a blazer, they pass almost anywhere short of finance.
What's out
T-shirts as the outermost layer (under a blazer, borderline). Hoodies. Anything with a big logo. Athletic shoes that look athletic. Ripped or faded denim. Shorts, always. Flip-flops, obviously. The rule behind the list: if it reads as weekend-first, it's out.
The calibration trick
Every office has its own dial on the business-casual spectrum, and the only reliable way to find it is observation. In your first two weeks, dress one notch up from your guess and watch what the people one level above your role wear. Dress for that tier, not your own: it reads as ambition rather than error, and it is the fastest way to calibrate.
The five outfits that always work
Men: navy blazer, oxford, chinos, loafers. Merino crew over a collared shirt, dress trousers, derbies. Women: tailored trousers, silk blouse, loafers. Knit dress with a structured jacket, low heels. Both: the dark-jeans-plus-blazer formula for casual-leaning offices. Rotate these and you will never think about it again.