What to Wear to a Job Interview — How to Choose a Suit by Industry

The classic interview suit disaster: a guy interviewing for a product marketing role at a tech startup shows up in a full three-piece black suit with a tie. The interviewer is wearing a hoodie and jeans. Everyone spends the whole meeting feeling awkward.

What you wear to an interview depends entirely on your industry and what role you're applying for. Different industries have wildly different definitions of "formal." Get it right, and it works in your favor. Get it wrong, and you're signaling that you don't understand the industry you're trying to join.

Finance / Consulting / Law — Traditional Formal Industries

Finance (banking, investment banking, brokerages), consulting (McKinsey, BCG, Big 4 advisory), and law are the most conservative industries. Wearing a suit is the default — not wearing one is actually a mark against you.

The standard: A dark matching suit + white dress shirt + tie + formal leather shoes. The color must be navy or charcoal gray. Skip black — in finance, black reads as "sales guy" and tends to collect lint under fluorescent lights, making you look less polished. Choose worsted wool fabric with a weight of at least 280g. Avoid anything with sheen.

White shirt only. Light blue is borderline acceptable, but white is the safest bet. Go with a spread collar — don't wear a point collar, since it makes your tie knot look too small. Shirt cuffs should peek out about 1 cm past your jacket sleeves. That's the detail that tells people you know what you're doing.

Ties have a lot of rules. Stick with subdued colors — navy, burgundy, dark green. No reds, no brights. Go with solid, micro-pattern, or polka dot prints. Striped ties can work for US investment banking interviews, but for traditional industries in China, they can feel a little too "Wall Street" and try-hard. Tie a Windsor knot, and make sure the tip hits right at your belt buckle.

Shoes: Oxfords, not Derbys. The closed lacing system of Oxfords is more formal. Plain cap-toe black Oxfords are the gold standard for finance interviews. Give them a light polish — not a mirror shine, which can look like a display piece. Wear dark gray or navy mid-calf socks, never white.

Your belt width should match your shoe color. A 3 cm black belt with black shoes, or a 2.5 cm brown belt with brown shoes. Ideally the finish matches too — shiny leather with shiny, matte with matte.

Internet / Tech — "Formal but Not Trying"

At big tech companies (Tencent, Alibaba, ByteDance), startups, and SaaS companies — very few people wear suits to interviews. That doesn't mean you should show up in flip-flops. The principle: Smart Casual + Clean and Put-Together.

Best move: A blazer with non-matching pants. A navy blazer (not a formal suit jacket) with dark gray wool trousers or dark chinos. Wear a white T-shirt or high-quality cotton shirt underneath — no tie. Wearing a tie to a tech interview is like showing up with a name tag that says "New Guy."

If you skip the jacket, still wear a collared shirt. Lots of tech interviewers wear hoodies themselves, but as a candidate, a polo or button-down is the floor. I'd recommend a high-quality oxford cloth button-down — fabric with some texture but not stiff. Unbutton the top button, no tie. Stick with white, light blue, or fine gingham. No floral prints, no solid black.

Shoes: Loafers or clean white sneakers. Suede loafers are the universal answer for tech interviews — dressier than sneakers, more relaxed than dress shoes. If you go with white sneakers, make sure they're all-white leather (Common Projects style), not athletic shoes with giant logos.

Accessories: Smartwatch is fine, but swap the band for leather or metal. Keep your backpack minimal — no bulky Swiss Army-style bags. A dark canvas or leather messenger bag looks much better if you're carrying a laptop.

Bonus tip: Tech office interiors are usually gray, white, and wood-toned. Wearing navy, gray, white, or beige helps you blend in visually with the environment. It's not woo-woo — research shows that people subconsciously trust others more when their colors match the surroundings.

Sales / Marketing / FMCG — Polished and Stylish

Sales, marketing, and FMCG (P&G, Unilever, etc.) interviews require a suit, but one that shows taste, not conservatism. Interviewers aren't just evaluating your ability — they're evaluating how you present yourself. In sales and marketing, your image is part of your product.

Your suit can have more personality. A peak lapel navy or pinstripe suit works well — it feels more fashion-forward than a notch lapel. Fabrics with subtle texture — birdseye, herringbone, fine glen plaid — are all great options. Don't agonize between solid and patterned; go with a textured dark fabric that reads as both formal and distinctive.

Shirts and ties can be more flexible. White is safest, but light blue or fine-stripe shirts work too. Ties can have more personality — polka dots, subtle checks, or paisley. The tie color can echo your pocket square, but don't make them identical.

Shoes can be more fashion-forward. Double monk straps or brogued Oxfords are both solid picks. Skip totalmente plain-toe shoes — they're too conservative. Go with dark brown or burgundy to pop against a navy suit.

Details are where you shine: Cufflinks, a pocket square, a lapel pin, a nice belt buckle — these accessories signal attention to detail in sales and marketing interviews. Just don't wear more than three accessories at once; too many and you cross into flashy.

State-Owned Enterprises / Government — Play It Safe

For state-owned enterprises (SOEs), government organizations, and civil service exams — only one rule matters: The more conservative, the better. The more traditional, the safer. Don't try to express your personality through your outfit. In these settings, personality is a liability.

The formula: A black or navy matching suit + white shirt + dark tie + black Oxfords. No checks, no stripes, no peak lapels. A notch lapel is your safest choice — it signals formality without flashiness.

Tie: solid and dark. Navy, charcoal, or deep maroon are all fine. No patterns of any kind. A tie bar? This detail gets noticed in SOE interviews. Nobody will ding you for not wearing one, but if you do, people will note your attention to detail.

Hair and grooming matter more than the suit itself. In SOE interviews, "neat" is 10x more important than "expensive." Get a clean haircut, no dyed hair, no pomade buildup. Shave clean. Trim your nails. Polish your shoes. These trivial details carry way more weight in traditional-industry interviews than you probably think.

Universal Checklist — 7 Things to Check Before Any Interview

No matter what industry you're interviewing for, run through these 7 items before you walk out the door:

1. Shoulder seam placement — The seam should sit right on your shoulder bone, not drooping onto your arm
2. Jacket button rules — Two buttons: fasten the top one only (or neither). Three buttons: fasten the middle one only
3. Tie length — The tip should just touch your belt buckle when tied
4. Sock color — Dark mid-calf socks. No bare skin showing. No white socks.
5. Clean shoes — No dust on the uppers, no visibly worn-down heels
6. Tags removed — The outer tag on the jacket sleeve and any brand tags on the cuff — all gone
7. Shirt collar and cuffs — Collar should sit 1-2 cm above the jacket collar. Cuffs should show about 1 cm

Wearing a suit to an interview isn't about proving you can afford one. It's about showing you take this opportunity seriously. When you're unsure what an industry expects, it's always safer to overdress than underdress — you can adjust once you see what other people are wearing, but the first impression is already made.