How many cases do I need to reach offer level with a mix of coach and peer practice?

Question

1. Given this mix of coach and peer practice, roughly how many cases should I expect to need before I'm at offer level for MBB?

2. Many people say quality over quantity, but what does that actually mean in practice? What should I be doing after each case to properly deconstruct it and make sure I'm improving; not just logging cases without real progress?

Answer 1

It really depends on your starting point and speed of learning, but in my experience it typically ranges from ~20 to 60 cases to reach offer level.

On the quality vs quantity point; both matter. You won’t get there with just volume, but you also won’t get there with too little practice.
For example, 10 cases with a strong coach can be more valuable than 60 with peers, but you still need enough repetitions to build consistency.

What I usually recommend:

Do at least one session with a professional coach at the very beginning to learn the basics and fix major mistakes early
Then practice with peers
Do another checkpoint session 2–3 weeks before interviews to identify remaining gaps and still have time to fix them

On quality in practice, after each case you should:

Identify 1–2 key mistakes (not 10 things)
Understand why they happened
Actively fix them in the next case

That’s how you improve; not by just logging more cases, but by closing specific gaps one by one.

Feel free to DM me if you want to go deeper.
Best,
Franco

Answer 2

Hi there,

you should be doing cases from different business areas with focus on different "frameworks" to cover the required breadth. That will land you somewhere between 30-40 cases if you do it thoroughly. However, there will be diminishing returns over time just by doing "one more case".
Do a case with a coach early on in your preparation so you can gauge where you stand and what you need to improve upon. Request actionable feedback from the coach if they don't give it to you proactively so you know HOW you can actually improve while you practice. Afterwards, take some time for self-study and sprinkle in some peer-to-peer sessions so you get used to talking while solving a case. Then have another checkpoint with a coach to evaluate your progress and refine your further preparation. You should keep a mental checklist based on your observations and takeaways from cases you did (e.g. certain patterns, common pitfalls to check against during each new case)

During my preparation as a candidate, I didn't have enough time to get in 30 practice cases - I made the mistake of applying too early and getting an interview invite "too early" in return. I still ended up getting the offer though. There were probably some fortunate circumstances that contributed to that outcome (like there mostly are) but what I'm trying to say is that there is no magic number of completed cases that will get you an offer. You should keep practicing as long as you notice real progress - or until you run out of time.

Best