McKinsey Case Prep

Question

Hi, I wanted to know how close are the practice cases that McKinsey provides online on their website to the actual ones they do during first round/final round case interviews? Are the similar? What about in terms of difficulty and structure? Thanks!

Answer 1

Hi,

The cases on their website and the ones they provide in their case "coaching session" are pretty representative overall, both in structure and difficulty.

Where they differ slightly is that their cases tend to be less “framework-friendly” than typical prep material, you’ll often need to build your structure from scratch without relying on the typical frameworks you can find online, which can make them feel a bit harder.

For first rounds, what you see online is quite close to reality. For final rounds, it’s a bit broader, more variation, sometimes more unconventional or discussion-driven cases, so you need to be comfortable thinking on your feet beyond standard formats.

Regards,
Franco

Answer 2

I can confirm the other coaches' statements. The online cases are quite comparable to the real interview cases. The focus on unconventional frameworks is even part of some of their practice cases like the Diconsa one. In terms of general structure (e.g., no. of questions, share of math part) and interviewer- vs. interviewee-led structure they are exactly the same. The math parts are also quite comparable - in general you don't get some very extensive and time consuming or very tricky finance specific math sections in their cases. They always try to have the case solvable by someone without a business background in the given time without only doing maths. So that limits how difficult it can get.

I hope that helps!

Answer 3

Hi Anonymous,

Let me answer with three points:

It truly depends on what role you are applying for. Based on my experience at McKinsey and my experience in coaching US McKinsey applicants, I can confidently tell you that those cases are not a good example of cases given out to MBA students or experienced hires -- the logic of the online cases is honestly easier than what my coachees got in the real live case
Those cases are often too interviewee-led. Especially Senior Partners in R2 like to manage their cases in a more conversational way. The way the cases are descripted makes them sound like high school maths exercise: "this is the data, now solve the problem on your own". The reality is that every solution should come from a discussion with the interviewer, who might require you to ask for additional data and to brainstorm together if the case has a non-obvious solution
I think they are underestimating the incidence of market sizing cases. The online solved cases give you a good variety of case types/options, but the reality is that (especially in R1) the incidence of cases with a market/opportunity sizing is very strong -- typically above 50-60%

My short answer: you can start studying from there, but make sure you understand the differences vs. the real cases (i.e., level based on YOE, the conversational element of casing, the real incidence on market sizing)

Hope this helps!

Tom

Answer 4

The structure matches but the difficulty and dynamics really don't.

The format is the same, you get a problem statement, structuring, quant, an exhibit, and a synthesis at the end. Math and exhibit style are similar too, so it's useful for getting the rhythm.

Where they fall short though. The practice cases are static. Real interviews are live, the interviewer pushes back on your structure, asks follow-ups, and tests how you handle pressure when you're not sure of the answer. Real cases also demand sharper synthesis and richer judgment, the kind of "so what" and "what would you actually recommend" thinking that the website doesn't really train you on.

So use them to learn the format and get familiar, then switch to live cases with a partner pretty quickly. PrepLounge, prep groups, a coach, whatever works. That's where the real prep happens.

The website cases are maybe a 4 out of 10 compared to a real first round. Don't over-rely on them.

Good luck.

Answer 5

The intent of having the material online is to genuinely help the candidates understand the nature of the interview cases. They are fairly representative esp. for the first rounds. For the following rounds, given its more senior discussion - tend to not follow a structure per se.

Good luck !

Answer 6

hey!

They’re similar in structure but noticeably easier than real McKinsey interviews; the online practice cases show the format (interviewer‑led flow, hypothesis‑driven steps, math style), but the actual cases you’ll get in first and final round are more ambiguous, faster‑paced, and require sharper structuring, as someone who interviewed candidates at McKinsey, I’d say they’re good for understanding the style, not for gauging true difficulty.

Best, Alessa

Answer 7

Hi there,

Yes, they are similar.

If you're looking for McKinsey-style cases, check also my cases on the PrepLounge library. They are inspired by cases that candidates of mine have received during interviews and then rewritten.

Sharing a couple of them here:

Best,
Cristian