Consulting Interview Dress Code 2026: Twelve Firm Rules

Twelve consulting interview dress codes, four registers

The table is the evidence. Read the row that matches your invitation, because the rows contradict each other.

Adding the categories by hand gives two at business professional, one at professional business attire, one at business casual, one at smart casual, one inverted rule, four unspecified professionals, one occasion-relative instruction and one deferral. That is twelve.

Not one of the twelve defines what its register contains in terms of garments.

Business casual against business professional

The sharpest disagreement is between two firms writing about the same exercise on the same kind of page.

KPMG Canada has a section headed Interview attire, and it reads: "Dress confidently and comfortably, but always maintain a professional image. We recommend dressing business casual."

Charles River Associates takes the opposite position and uses the only absolute in the corpus. For in-person interviews: "Ensure you are neatly dressed in business-professional attire." For video: "Always wear business-professional attire, join the call 5-10 minutes ahead of schedule, take or refer to notes, and maintain eye-contact throughout the meeting."

West Monroe sides with CRA and repeats itself deliberately, once per channel. In person: "This is an opportunity for you to put your best foot forward. We typically recommend that people dress business professional." On video, the same words again: "we recommend candidates dress business professional."

Three official pages, one register apart, read on the same day. A page that tells you consulting has moved to business casual is wrong about two named firms, and a page that tells you to wear a suit everywhere is wrong about one.

The firm that publishes the dress code gap

WTW does something no other firm does. It tells you to overdress and says so in the same sentence: "Whether your interview is in person or virtual, wearing professional business attire is a great way to make a good first impression. The people you meet at WTW are likely to be dressed in business-casual."

That is the mismatch every candidate suspects, printed by an employer. The firm gives no reason for it.

The same page carries a clock instruction that contradicts another firm's on the identical number: "you should arrive at the office with at least 10 minutes to spare to allow for security screenings or other possible delays." Charles River Associates says the reverse, asking candidates to arrive "no more than 10 minutes early."

Ten minutes is a floor at one firm and a ceiling at the other. Neither is a general rule, and both are published. WTW also adds the only physical-preparation instruction in the set: if the interview is in person, print a fresh copy of your resume and your list of questions.

The one firm that inverts the dress code question

BCG Platinion answers a question headed "What is the dress code for the interview process?" by describing its own staff first.

The firm writes that "Our interviewers dress for the interviews in the same way they do for their current client meetings." Then the qualifier: "Of course, this can vary depending on the client." Then the rule: "Therefore, the rule for you is: 'Come as you are'", with the gloss "wear what you would wear in your daily work at BCG Platinion."

Read literally, that asks an external candidate to dress as they would in a job they do not have. It is the only instruction in the corpus that supplies no external target. Whether it reads as generous or as unhelpful depends on whether you already know the firm.

Two other firms decline to name a register for different reasons. Deloitte's United States page says "dress appropriately for the occasion, and present yourself authentically", and it is the only page in the corpus to attach an accessibility clause: candidates for whom physical or neurological factors make the firm's recommendations unworkable are invited to "think about other ways you can authentically demonstrate your confidence and engagement."

And KPMG UK defers the answer to the invitation, alongside the money: full instructions "including travel expenses and what to wear will be provided ahead of the event."

Where the office dress code is looser than the interview

Two firms publish both a workplace dress code and an interview instruction, and in both cases the workplace is more relaxed.

EY's own FAQ is explicit: "Our office dress policy is business casual, which includes jeans. This means you can wear clothes that make you feel comfortable for the day you have planned. The exception to this rule is that when you're based at client sites, we encourage you to adopt the client's dress code."

FTI Consulting's Australian student page publishes a code that varies by weekday: "You may wear informal business attire Monday to Thursday, and casual attire on Fridays, unless you are meeting clients, external parties or attending formal meetings or events. In this case, formal business attire is required."

Counting that out gives three registers across five days plus one override. Informal on four days out of five, casual on one, and formal whenever a client is in the room regardless of the day.

The pattern across both is the same, and it is the single most useful inference on this page. The client-facing register is the strict one, and an interview is treated as client-facing. No firm in our corpus publishes an interview instruction looser than its own office code.

Four steps when nothing is published

Your firm is probably one of the ones that publishes nothing. These four steps use only what is on the record.

1. Search the careers site for the word attire. Twelve firms have an answer and it is usually inside an interview tips or FAQ page rather than on the main careers page.
2. Ask the recruiter, and treat the answer as the rule. KPMG UK puts what to wear in the invitation pack. Alvarez & Marsal, Bain and several others name the recruiter as the source of every process detail.
3. Default to the client-facing register. Both firms that publish an office code make client contact the trigger for formality, and every firm that names a register for interviews names a client-facing one or looser.
4. Match the channel instruction, because four firms publish one. Kearney asks for attire "just as professional" on video. CRA says always. West Monroe repeats its recommendation for video. Huron covers both in one sentence. Capital One publishes no attire rule at all and instead requires the camera to stay on for the full interview.

One more thing worth knowing about weight. The only first-hand assessment day account in our corpus, from a named graduate at EY actuarial consulting in 2022, describes how she prepared and never mentions clothes: "To prepare for the assessment centre, I researched the company to find what their key values are and what strengths they look for in candidates." One person, one day, and an absence rather than a finding.

What the interview is actually scored on is the reasoning. Our structure rubric weights Coverage 45 out of 100 and our synthesis rubric weights Answer first 35, and those are the things a candidate can still change on the morning of the interview. The weights are ours, read from our own code, and no firm publishes a comparable scheme. The reasoning is on how an answer is assessed and the drills run free and without an account from the tools page.

What no firm publishes about what you wear

Five gaps, and the first one makes every list of garments you will read elsewhere an invention.

No firm defines its register. Business professional, business casual and smart casual appear as labels with no garments attached, at every firm that uses them.

No firm says the choice is scored. Twelve publish an instruction and none says what a mismatch costs.

No firm publishes a map by country. Accenture's smart casual belongs to an Australian assessment day, and no firm publishes how its register changes by office.

Deloitte never says what the occasion is. Its instruction is relative to a referent the page leaves undefined.

And four of the firms most people are asking about publish nothing at all. McKinsey, BCG, Bain and Oliver Wyman have no interview attire instruction in our corpus, and BCG Platinion is a separate entity whose rule does not transfer to BCG. For what does change on video see remote case interviews, for the day these instructions usually attach to see group case interviews, and for the sequences themselves see the consulting interview process.