"Why consulting" is not a poem about loving problems. It is a choice against alternatives — industry, banking, product, a PhD, a family business — with three reasons you can still defend when they say "so why not stay?" Finish with a firm-specific line that fails a name-swap. McKinsey may ask this and run a 10–20 minute PEI on a different story; do not spend PEI on this speech (PEI guide). BCG and Bain will often fold it into short fit (BCG fit, fit questions).
Last full pass: 24 August 2026. CoachNed is independent practice material, not affiliated with McKinsey, BCG, or Bain.
The three-part answer (then they probe)
| Part | Job | Evidence | Follow-up they will ask |
|---|---|---|---|
| 1. The work | What you want to do on Tuesday | A time you structured an ambiguous problem for someone who had to act | "Give me an example" |
| 2. The training shape | Why this apprenticeship vs an industry rotation | Steep variety + senior clients you have already tasted or honestly lack | "Why not a rotational program at your current company?" |
| 3. The rejected path | What you are walking away from | Banking / ops / lab / startup — named | "Why not [that]?" |
| Close | Why this firm | Office, practice, staffing, a real conversation | Substitution test |
Sixty to ninety seconds. Sit down. If they want more, they will ask.
Pay is not a reason you say out loud as sentence one. You may care about it; the salary pages exist. "MBB prestige" is not a reason that survives "so you'd take any of the three?"
Worked example: ops analyst vs consulting vs staying
Weak (dies at "why not stay?").
"I've always been passionate about solving complex problems and working with smart people. Consulting offers a steep learning curve, exposure to senior leaders, and the chance to make an impact across industries. I'm excited to join a top firm and grow."
Every firm, every year, every candidate. No rejected path. No Tuesday.
Strong (~80 seconds).
"I want to spend the next few years on messy operating problems with a senior client in the room, not two more years optimizing a single plant's labor standard. At Northfield I built the overtime model the plant manager actually used — we cut 11 percent of OT by changing the weekend shift rule, not by a speech. What I cannot get if I stay is breadth plus the obligation to recommend when the data is incomplete. The company rotational program would keep me in one P&L. I looked at IB: I like models, I do not want a world that is only models. Consulting is the job where the model is a means. I'm targeting Bain Dallas because they staff locally and the PE plus ops mix I heard about from [Name] matches the overtime work I already do; a McKinsey answer would be a different office conversation, not this sentence."
What to steal. A metric you owned, a rejected path with a real reason, a firm line that breaks if you paste BCG. Do not invent [Name].
If you are targeting McKinsey, the close is an office/practice/MGI piece you read — and you still need PEI stories that are not this paragraph.
Firm-specific last lines (examples of shape, not scripts)
- McKinsey: interviewer-led problem solving + PEI is how they hire; your close can mention the kind of study (ops, public sector) and the office. Prep: McKinsey case.
- BCG: ideas plus transformation, Casey then candidate-led; mention a capability or BCG X/Platinion only if that is the job. BCG cases.
- Bain: results, PE, local office. What is Bain.
Dual-applying is normal. Dual-scripts are obvious. Write three closes.
Failure modes that are specific to this prompt
- Prestige fog. "Best firms, best exits." They hire people who want the work.
- No rejected alternative. Then you have not chosen.
- PEI story dumped into why consulting. Different scored product.
- Pay, hours denial, or "work-life balance" as the pitch. Read working at McKinsey so you do not lie to yourself; still do not make hours the headline of why you want in.
- Name-swap survives. Rewrite the last sentence.
- Inventing a coffee chat. Recruiter networks are small.
- Reading the grocery PEI example from another page as your story. Do not.
How to rehearse
Write the 90-second version. Record it. Cut "passionate," "unique," "ever since I was young." Then answer out loud:
- Why not your current industry.
- Why not banking / product / policy.
- Why not a two-year wait for promotion where you are.
- Why this firm (substitution).
- Why this office.
If any answer is new information you did not put in the 90 seconds, either add a clause or wait for the probe — do not ramble it all in the opener.
A 40-word skeleton you can fill (not a script)
"I want [Tuesday work]. I already [evidence with a number]. Staying in [current path] only gives me [limitation]. I am not choosing [rejected alternative] because [specific]. I want [firm] in [office] because [non-substitutable]."
If you cannot fill the brackets without adjectives, you are not ready. If the last clause still works for all three MBB firms, you are not ready.
Then prove you can do the job: try a case. Fit bank: behavioral. McKinsey story depth: PEI. Chatbot or SOVA if invited: Casey, SOVA.