Fit interview prep?

Hi,

Fit interviews are generally quicker to prepare than cases, but  that does NOT mean they are less important. Investing the right amount of time here is pivotal as fit can be a decisive factor

On the effort required, it’s very difficult to quantify in hours without assessing your starting point.The range can vary significantly depending on how naturally structured and concise you already are otherwise it would just be guesswork.

That said, I’d break preparation into two key parts:

• Content preparation:start from a comprehensive list of questions and prepare your answers in a structured way (there are many frameworks out there you can use, like STAR); write your stories down  and make sure they are clear, structured, and tailored.
• Delivery and rehearsal. You need to practice your answers aloud. Ideally with a coach (best option), or at least with someone who can give you feedback.Recording yourself and reviewing it  is also a good fallback. I would not rely on just “thinking through” your answers, it’s very hard to assess your communication objectively while speaking

The candidates who improve the most are the ones who iterate on both structure and delivery.

Hope this helps!
Franco

Hi there,

A lot of people assume fit is either “you have it or you don’t.” In reality, most strong candidates you see didn’t start out polished — they just put in very targeted practice.

If I think about candidates I’ve worked with (especially those who didn’t feel like natural communicators), getting to a solid “pass” level in fit usually takes somewhere in the range of ~20 hours, give or take. Some need a bit less, some more — but that’s the right order of magnitude if the practice is actually deliberate.

The key difference I see is how people use those hours.

The ones who improve fast don’t try to prepare 10+ stories. They pick a handful of experiences (4–5 max) and really work them. Not just recalling what happened, but shaping them so they’re easy to follow, clearly structured, and actually answer the question.

And then — this is the part most people avoid — they practice out loud. A lot.

You only really notice the problems when you say your answers:
you go in circles, you lose the point, you add unnecessary detail, your energy drops. None of that shows up when you’re just thinking quietly.

Another thing that helps a lot (even though it feels awkward at first) is forcing some structure into your answers. Not in a robotic way, but just being intentional about how you start. For example, instead of diving into the story, taking a second to frame it:
what the situation was, what you were trying to achieve, and why it matters.

Once that clicks, your answers become much easier to follow — and you sound more confident without “trying” to.

Also, small but important: don’t aim to sound polished. Aim to be clear. Those are not the same thing. Some of the best candidates I’ve seen are not particularly “smooth,” but they’re very easy to understand and feel genuine.

If I had to boil it down from what I’ve seen work in practice:
focus on a few strong stories, structure them properly, and say them out loud until they feel natural. That’s really it — but you do have to actually do the reps.

Best,

Soheil

For someone who is not a natural communicator, expect 20 to 30 hours of deliberate practice to reach a strong level. Not reading guides. Actually speaking answers out loud, recording yourself, watching it back, and repeating. That loop is the only thing that works.

Start by building five to six strong stories covering leadership, failure, working with a difficult person, and why consulting and this firm. Once you have those, spend the rest of your time on delivery.

The biggest issue for non-natural communicators is trying to remember the story and tell it well at the same time. The fix is to know your stories so well you are not thinking about what comes next. Then your brain is free to focus on how you are saying it. Record yourself doing five questions in a row. Watch it back. Cringe. Repeat.

Keep the structure simple: one sentence on the situation, two or three on what you did, one on the outcome and what you learned.

Polished delivery helps but it does not replace a real story with real stakes.

hey there :)

from my MBB experience, candidates who aren’t naturally polished usually need around 3-5 focused hours to reach a solid passing level in fit, but the key is not volume it’s very targeted practice, meaning you refine 3 to 5 core stories until they are extremely structured, concise and flexible across questions; what works best is repetition with feedback, recording yourself, and pressure testing your stories with follow ups since that’s where most people struggle, especially for Mck PEI where depth and clarity are critical and typically require more prep time; I usually do 1 to 2 hours focused personal fit sessions where we cover all core questions and refine your delivery, and happy to also do a 1 hour session if you want to keep it targeted

best,
Alessa :)

That's a a great question.

I typically recommend my candidates to start the personal fit prep at least one month before the interviews.

It takes a while to build the stories. 

And at this point most candidates realise that doing really well on the personal fit is actually more complicated than they thought. 

Then once they have feedback they can restructure story and rebuild the content. 

Then it's a matter of practicing the delivery. 

So it takes a while. 

If you're looking to practice and improve on this, reach out. 

I also built a course targeted at personal fit for MBBs that you can find here:

• • Video Course: Master the McKinsey PEI

Best,
Cristian