Preparing for MBB internship

First off, congrats on the offer!!

In my opinion you do not need to “pre-learn consulting” to succeed. The internship is much more about professionalism, and being someone teams enjoy working with.

Anyway a few areas that are worth focusing on:

• Excel and PowerPoint. This is probably the highest ROI prep (e.g. INDEX/MATCH, XLOOKUP, SUMIFS, pivots, slide formatting and shortcuts)
• Logistics. Get housing sorted early, buy comfortable business casual clothes that fit well, a decent work bag/backpack.
• Time management. Learn how to manage your calendar and to-do list

The interns who get return offers are the ones who are dependable, improve quickly from feedback, have a good attitude.  You are not expected to know everything. You are expected to learn quickly and be coachable.

A final point: enjoy the year before starting. You’ll have plenty of time to work hard later. It’s smart to prepare, but you do not need to spend the next 12 months grinding consulting content to succeed.

Hope this helps and good luck,
Franco

Congratulations on landing your Bain internship!

To answer your questions about the work itself, there are two main things that will put you ahead of your peers before you even start:

• Strong Excel skills
• Solid PowerPoint skills

If you’re comfortable building models in Excel and know your way around PowerPoint, you’ll already be a step ahead.

A few other things that can help:

• Set up networking coffee chats with Bainies before you start. It’s a great way to meet people early and pick up practical tips and tricks.
• Mentally prepare yourself for a fast-paced environment with constant feedback and high expectations. The expectation is that you’ll ramp up quickly, but a lot of the learning happens on the job — being ready for that mindset is half the battle.

Wardrobe:
You’ll likely spend a lot of time at the client site, so think business professional. For men, a suit is standard (though ties usually aren’t necessary). For women, tailored pants or a knee-length skirt with a blazer and blouse works well. You’ll probably also be traveling quite a bit, so prioritize comfort as much as professionalism.

Housing:
This depends on the city where you’ll be interning, but I’d avoid anything too expensive or too far from the office and airport. Since you won’t know your client locations in advance, flexibility is key. It’s also worth making sure you have a comfortable setup at home for occasional WFH days or late nights.

All the best — happy to chat more if helpful!

Congrats again!

Annika

First of all, congrats — getting an internship at Bain & Company is already a big achievement.

Honestly, the good news is that you do not need to spend the next year trying to become a perfect consultant before day one. The firm knows interns are interns.

That said, there are definitely a few things that make the experience much smoother and increase the chances of a return offer.

The biggest thing is probably communication and professionalism, more than technical skills.

A few practical things I’d focus on:

• Become comfortable with PowerPoint and Excel basics
  Not advanced stuff — just:
  • clean slides
  • basic formulas
  • organizing information clearly

• Practice concise communication
  Being able to explain:

  • what you found
  • why it matters
  • what the implication is

  in a very clear way is huge.

• Learn to structure problems
  You already did cases, which helps a lot. Keep that mindset:
  • break things down
  • prioritize
  • don’t get lost in details
• Get comfortable asking for feedback
  This is honestly one of the biggest differentiators for interns.

People who do well usually:

• ask good questions
• improve quickly
• are pleasant to work with
• show ownership

not necessarily the “smartest” person in the room.

And one important thing: don’t underestimate energy and attitude. Teams remember interns who are:

• reliable
• positive
• calm under pressure
• easy to work with

much more than interns who try to sound impressive all the time.

Also, enjoy the year before starting. Seriously.
You’ll have plenty of time to work hard once the internship begins.

hi! 

The best prep is not learning consulting frameworks; it’s getting comfortable with Excel basics, clean slide writing, and structured communication, because those three skills drive 80% of intern performance. Lightly refresh business intuition (profit drivers, simple market logic), learn how to make a clear 1‑page storyline, and practice turning messy info into a crisp takeaway. For non‑work prep: secure housing early, build a simple business‑casual wardrobe, and arrive rested. Bain trains you on everything else, interns succeed by being clear, fast, reliable, and easy to work with, not by knowing strategy frameworks.

Best, Alessa

Ah, that's an amazing ambition. 

I've actually written two materials on this that you might find useful:

Expert Guide: How to Become A Distinctive Consultant

Expert Guide: How to Manage for Lifestyle in Consulting

But that aside, what I would suggest is that you gain some genuine exposure to consulting work, even if it's pro bono for a local organisation. It will help you gain a better understanding of the job, develop your skills, and enable you to demonstrate additional experience.

Best,
Cristian

Congrats on the Bain ACI offer.

Most technical stuff gets taught during onboarding. Focus on softer prep that actually moves the needle.

What to prep. Excel and PowerPoint fluency, master shortcuts and clean slide formatting. Read Pyramid Principle by Barbara Minto, the single most important book for structured communication. Build a daily reading habit with The Economist or FT. Brush up basic finance (P&L, NPV, IRR). Sharpen mental math.

Soft skills matter most. Active listening, asking sharper questions, taking feedback well, managing up.

Non-work tips. Book summer housing early. Invest in 3 to 4 good blazers. Build sustainable sleep and energy habits.

Return rate is high. Be coachable and don't burn out.

Good luck.