How to Start a Case Interview: The First 60 Seconds

To start a case interview well, listen to the whole prompt without writing yet, then play the key facts back in your own words, confirm the objective in one sentence, ask two or three sharp clarifying questions, and tell the interviewer you need a moment to structure your thinking before you go silent to build your framework. That whole sequence takes about 60 to 90 seconds. It is the most consequential minute of the entire case, because it is the first real data the interviewer gets on how you think.

I conducted more than 100 McKinsey case interviews, and I could usually tell within that first minute which bucket a candidate was going to land in. Not because the open itself is scored heavily on some rubric. It isn't. But because how someone handles an unfamiliar problem with no time to prepare tells you almost everything about how they'll handle the other 25 minutes. A candidate who freezes, rushes, or parrots the prompt back word for word is telling me something true about how they operate under pressure. This article breaks the open into four moves, in order, with the mistakes I saw most often at each one.

Why the open matters more than candidates think

Most candidates spend their prep time on frameworks and math drills, and almost none of it on the 60 seconds right after the interviewer stops talking. That is backwards. A shaky framework can be repaired mid-case. A bad open sets the interviewer's expectations low, and low expectations are hard to shake even when the middle of the case goes well. I have watched strong analytical candidates dig themselves a hole in the first minute that a great structure couldn't fully climb out of.

The good news is that the open is almost entirely learnable. It is not a talent. It is four moves, done in the same order every time, until they are automatic.

Move 1: Listen first, write second

The instinct under pressure is to start scribbling the moment the interviewer opens their mouth. Resist it for the first pass. Listen to the whole prompt once, all the way through, before your pen touches paper. You will retain more of it than you think, and you free yourself to actually hear the shape of the problem instead of chasing individual numbers.

Once the interviewer finishes, then take notes as you play the facts back. This ordering matters because candidates who write while listening tend to catch fragments and miss connections, which is exactly what shows up in a garbled restatement two moves later.

Move 2: Play the facts back, don't just repeat them

This is where most candidates go wrong, and it is fixable in one sentence of advice. Reciting the prompt back word for word is not the skill being tested. Synthesizing it is.

Here is the difference. A candidate who repeats gets this far: "So the client has revenue of 400 million and profit declined 19 percent, and they want to know why and what to do." A candidate who synthesizes gets here instead: "Our client is a 400 million dollar industrial manufacturer whose profits have dropped 19 percent despite the market growing, and they need us to find the root cause and reverse it." Same facts, but the second version shows relationships between the numbers instead of listing them. That is a preview of the exact skill a consultant uses in front of a client, which is why interviewers listen for it so closely.

Keep this to two or three sentences. A client one-liner, the key numbers, and the objective. If you find yourself narrating for 30 seconds, you have drifted from synthesis back into recitation.

Move 3: State the objective as a single sentence

Before you ask a single clarifying question, name what success looks like. Something like: "So we're trying to figure out why profit dropped despite revenue growth, and identify what levers the client has to fix it." This does two things. It forces you to check that you actually understood the ask, and it gives the interviewer a chance to correct you cheaply, in five seconds, instead of watching you build an entire structure aimed at the wrong target.

I cannot count how many times a candidate skipped this step and built a beautiful, well-organized structure that answered a question the client hadn't asked. The interviewer usually lets that play out for a minute before stepping in, and by then the candidate has lost time and composure they don't get back.

Move 4: Ask two or three clarifying questions, then stop

Clarifying questions exist to remove genuine ambiguity, not to buy thinking time or perform diligence. Good questions here are specific: what does the client mean by profit, is it a single product line or the whole portfolio, has anything changed recently that might explain the timing. Bad questions are generic filler that a competent case-cracker asks on autopilot regardless of the prompt, like asking for the industry growth rate on a case that already gave you the industry growth rate.

Two or three questions is the right range. One question can look thin. Six starts to look like stalling, and interviewers notice. If you want the long version of what separates a sharp clarifying question from a wasted one, I wrote a full breakdown in clarifying questions in case interviews.

Move 5: Ask for the pause, out loud, then go silent

Once your questions are answered, say the sentence that buys you room to think: "Give me a moment to organize my thoughts before I share my approach." Then stop talking. This is the one moment in the whole case where silence is expected and welcome, so use it fully instead of narrating half-formed thoughts out loud to fill the quiet.

Aim for 60 seconds to two minutes here, no more. Long enough to build something clean, not so long that the interviewer starts wondering if you're stuck. What you build in that silence is the actual structure of the case, which is a different skill with its own failure modes. I cover how to build it from first principles instead of memorized templates in how to structure a case interview, and the underlying tools in the case interview frameworks guide.

The first 90 seconds, move by move

What actually gets scored in this window

Interviewers are not grading vocabulary or confidence tone in the open. They are watching for three things: can you compress information accurately, can you tell a real ambiguity apart from a question you already know the answer to, and can you manage the pace of the room instead of the room managing you. Candidates who nail the open usually share one trait, which is that they treat it as a checklist they've rehearsed rather than a performance they're improvising. That is available to anyone with enough practice reps, not just naturally quick thinkers.

The most common way I saw candidates blow this window wasn't nerves. It was over-preparation in the wrong direction, memorizing a generic opening script that didn't flex to the specific prompt, so the restatement sounded rehearsed and slightly off from what was actually said. I go through this and the other patterns that sink candidates before the case even really starts in the 10 most common case interview mistakes.

A quick note on notes

Whatever system you use for the rest of the case starts in this first minute. If your page is a mess by the time you're asking clarifying questions, it stays a mess for the next 25 minutes. I lay out a simple format for structuring your page from the first line in how to take notes in a case interview, and it is worth setting up before you ever walk into a live case.

The bottom line

The open is four repeatable moves: listen fully, synthesize instead of repeating, state the objective, ask a few sharp questions, then take your silent pause with permission. None of it depends on natural talent, and all of it gets better with reps against prompts you haven't seen before. If you want the next layer, on what to actually build during that silent pause, read how to structure a case interview.

Go deeper

Nailing the open is one piece of the CaseMap method I teach candidates end to end, from the first ten seconds of a case through the close.

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