I asked this question for fifteen years, in London, Paris and Hong Kong, and I could finish most answers from their second sentence. So can every interviewer you will meet. That is the first thing to understand about “why investment banking”: it is not a warm-up, and it is not really a question about passion.
It is a question about whether you understand the job you are applying for, and whether you will still be at the desk in month nine when the novelty is gone and the hours are real. Interviewers have been burned by juniors who quit. Replacing one costs the team recruiting time, training time and staffing gaps at the worst moments. Your answer is being priced against that risk.
Why this question decides interviews
It appears in nearly every process, from spring week competency questions to final-round superdays, and it is rarely decided on the first answer. It is decided on the follow-ups. A polished sixty seconds followed by a collapse at the second “why?” is worse than a rougher answer with a solid floor, because the collapse tells the interviewer the polish was rehearsal, not conviction.
Screeners are trained to catch templated answers, and this question attracts more templates than any other. The structure below is a structure, not a script. The content has to be yours or it will not survive contact.
The three-part structure
Every version of this answer that ever impressed me had the same skeleton, in some order: origin, the job itself, evidence. Forty-five to ninety seconds in total.
- Origin: the specific moment it became concrete. Not “I have always been passionate about finance,” which is a claim nobody can check and nobody believes. A moment: a deal you followed and actually read about, a spring week session that changed your picture of the work, a project where you discovered you liked living inside a company's numbers. Specificity is the entire currency here.
- The job itself: what the work is, and why that work suits you. Live transactions with real deadlines and real consequences. A learning rate you cannot get elsewhere at 22, because you sit close to decisions that matter. Responsibility early, in front of people senior enough to notice. If you cannot describe an analyst's actual work, this part exposes you; if you can, it separates you from most of the stack.
- Evidence: what you have already done to test the interest. People you have spoken to, and roughly who they were. Courses taken beyond the syllabus. Competitions, simulations, a student fund, deals followed closely enough to hold a view. Evidence converts a claim into a track record, and it is the part most candidates leave out entirely.
What never to say, and why
These are not style preferences. Each one triggers a specific conclusion in the interviewer's head, and the conclusion ends the candidacy.
- Money. Everyone in the room knows the pay. Saying it aloud tells me two things: you will leave the moment someone pays more, and you have no second reason. There are also easier ways to get rich than this job, and interviewers know that better than anyone.
- Prestige. Prestige does not survive the first bad week. An interviewer hears prestige and pictures your resignation email in month seven.
- “A stepping stone to private equity.” Everyone knows the exits exist. The sin is leading with them, because you are announcing your resignation in the interview itself. If asked directly about long-term plans, answer honestly and briefly. Never volunteer it as the reason.
- Naive comments about the hours. “I know the hours are long but I am a hard worker” is a sentence that has never once been backed by evidence in the same breath. If resilience is your claim, prove it with something you have actually endured; otherwise leave the hours alone.
- Stock phrases. “Fast-paced environment.” “Passionate about finance.” “Exciting opportunities.” These are sounds, not answers. Interviewers stop listening mid-sentence, and I say that as someone who did.
Surviving the why-chain
The real test starts after your answer. Interviewers pull threads, and the standard chain runs: why not consulting, why not sales and trading, why not the buy side straight away, and what happens if you get no banking offer this cycle. Each pull is checking the same thing: whether your answer has a floor that is not compensation.
- Why not consulting? Because advice and execution are different jobs. In banking you live with a transaction to signing; the recommendation is not the end of the work, it is the start of it. If that distinction genuinely appeals to you, say it in your own words.
- Why not the buy side now? Honest version: because the training ground matters. The reps, the technical base and the transaction exposure of the analyst seat are the reason buy-side firms hire from it. Wanting the apprenticeship first is a credible answer; pretending the buy side does not exist is not.
- What if you get no banking offer this cycle? The strong answer has a plan B that still points at the same destination: off-cycle internships, a valuation or transaction-adjacent role, and a second run at the process. A plan B that points somewhere else entirely tells the interviewer your plan A was decoration.
One test covers all of it: if your answer only works uninterrupted, it does not work. Drill it with someone who interrupts, challenges and asks “why” five layers deep. The chain is where this question is actually decided.
Three worked skeletons, by profile
Frameworks, not scripts. Interviewers catch recitation faster than any other failure, so take the shape and rebuild it from your own material.
- The finance student with a spring week. Origin: the moment during the week when the picture changed (a live deal discussion, a debrief with an analyst). Job: name what you saw analysts actually doing and why it suited you. Evidence: the week itself, the people you followed up with, what you have done since.
- The career changer or non-finance major. Origin: the analytical thread already in your field (the lab, the codebase, the dissertation) and the moment you realised transactions were where you wanted to apply it. Job: the transfer, stated plainly. Evidence: the self-study, the people spoken to, the deliberate steps taken since the switch.
- The non-target candidate. Lead with evidence, because that is your strongest suit: the network built without a campus pipeline, the cold outreach that turned into conversations, the technical base built alone. The subtext of your answer is dedication, and for this profile the subtext matters as much as the text.
FAQ
How long should the answer be?
Forty-five to ninety seconds. Past two minutes, interviewers stop scoring content and start scoring your inability to prioritise.
Can I mention exit opportunities at all?
If asked directly, yes, honestly and briefly. As your stated motivation, never.
Is “I find deals interesting” enough?
Only with proof attached: which deal, what you actually read, and what you concluded. Interest without evidence is a hope, not an answer.
What if my honest reason really is the money?
Then find the part of the work you genuinely want to be good at, because that is the floor the money answer lacks. If no such part exists, the interviewer will not be the biggest problem; the job will.
In the IBD Recruiting Review I run this question on you the way an interviewer would, chain included, and tell you honestly where it breaks. One hour, one to one.
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Former Executive Director in TMT Investment Banking at Nomura and M&A banker at BNP Paribas. Top-rated Head Mentor on Wall Street Oasis with 300+ sessions. About
