A few years ago a friend wore a full suit to a Series B startup interview in San Francisco. The hiring manager showed up in Patagonia and joggers. Nobody said anything about it, but my friend didn’t get the offer. Whether that was the reason or not, he’ll never know, and neither will I. But it planted the right question: what are you actually communicating with what you wear?
Interview attire has always been about signaling that you understand the context you’re stepping into. The problem is that the signals have become harder to read, especially as remote work blurred the lines between industries and dress codes stopped being enforced consistently even within the same company.
The general rules, with their real exceptions
The framework most people use: formal for finance and law, business casual for corporate tech and consulting, “smart casual” for startups and design companies. That framework is roughly correct and also occasionally wrong in ways that matter.
Finance is the most stable category. If you’re interviewing at a bank, hedge fund, private equity firm, or insurance company, a suit is still the default expectation in most of those environments. Not wearing one will be noticed. Some fintech companies are more casual, but when in doubt in that sector, the suit is still the safe call.
Corporate tech (large public companies, enterprise software) has moved toward business casual: no tie required, but a blazer over a clean shirt or blouse, fitted trousers or a professional dress. Jeans are sometimes fine; jeans with visible wear or distressing are usually not. Sneakers are a judgment call that depends heavily on the specific company’s vibe.
Startups are the genuinely hard category. “Smart casual” means something different at a 12-person seed-stage company than at a 400-person Series D. When you’re unsure, check their social media, their careers page photos, and the attire of employees you can find on LinkedIn. That’s not paranoid; it’s just research.
How to actually find out the dress code
Ask. This is underused and there’s almost no downside to it. When the recruiter confirms your interview, email back: “Could you let me know what the typical dress code is for interviews there?” Recruiters answer this question every week. It won’t make you seem unprepared. It will make you seem like someone who pays attention.
If you’ve already scheduled without asking, you can still email the morning before: “Just confirming my interview tomorrow at 2pm, and wanted to check on attire as well.” That’s a perfectly normal question.
Video interviews are different and most guides don’t cover this well
Remote and hybrid work has made video screening the norm for first and sometimes second rounds. The dress code advice changes in a few ways.
The camera sees your top half and your face. Wear what reads cleanly on a medium-resolution webcam: solid colors or small-scale patterns, nothing with fine stripes that create moire on video. Avoid very bright white against a pale background; it blows out the contrast. A blazer over a plain shirt reads as “professional and prepared” on camera in a way that casual wear doesn’t, even if the same blazer would be slightly overdressed in the physical office.
Lighting matters more than most people acknowledge. A face lit from behind (window behind you) will look underexposed regardless of what you’re wearing. Either face the window or use a lamp aimed at your face from in front. This is genuinely more important to your presentation than whether you’re wearing the right color tie.
Check your background. One study from Harvard Business Review on video call backgrounds found that cluttered environments behind speakers were rated as less professional and competent, independently of what the speaker was actually saying. A plain wall, a neat bookshelf, or a professional virtual background does real work for you.
The fit and cleanliness thing that nobody says directly
Fit matters more than price. A clean, well-fitting outfit from an ordinary store reads better on camera and in person than an expensive piece that doesn’t fit. This is obvious when you hear it and apparently not obvious from how people actually dress for interviews.
Iron things. Or steam them. This is worth more than upgrading to a more expensive item. Wrinkled clothing registers as low-effort regardless of the fabric or the brand.
What to do if you genuinely don’t own the right thing
The Bureau of Labor Statistics Occupational Outlook Handbook entry on HR managers notes that interview evaluations include professional presentation alongside qualifications. Which is a polite way of saying it matters, but it’s also not the primary thing. If you can’t afford a new blazer for one interview, a clean, pressed, dark-colored shirt or blouse is fine. Most interviewers understand the world they’re in.
Thrift stores are also a real option, especially for a blazer you’ll wear a handful of times. Consignment stores in most cities carry professional clothing in good condition at a fraction of retail prices.
The part where Craqly is actually relevant
Dress code is about reducing friction so the interview is actually about you and your answers, not the distraction of having worn the wrong thing. The same principle applies to preparation: the more you’ve practiced your answers out loud before going in, the less cognitive bandwidth you spend searching for words in the moment. Craqly’s interview prep gives you a place to do that rehearsal, which is most of what interview confidence is built from.
Wear something appropriate, make sure it fits, check how you look on camera if it’s remote, and then spend most of your prep time on the actual interview. The clothes are the floor, not the ceiling.