Last Updated on July 8, 2026
By Florian Smeritschnig, Former McKinsey Senior Consultant. Updated July 8, 2026.
Case interview note-taking is an important skill to master as it directly influences your ability to think and structure. For most candidates, they turn into a scribbled mess that slows them down and breaks their train of thought halfway through the case.
Interviewers never grade your notes, but I have watched strong candidates crash because they could not find a number they had written 90 seconds earlier. Good note-taking in case interviews is a system, not a talent. Take notes on paper, in landscape, split across a few labeled sheets, and keep them fast and abbreviated.
After evaluating candidates at McKinsey and running 2,200+ coaching sessions, here is the exact setup that keeps you organized, plus the quiet mistakes that cost points.
Key Takeaways
- Use paper and pen, in landscape orientation, even in a virtual interview. It gives you about 40% more width for issue trees and math than portrait.
- Split your notes across a few labeled sheets: one for the objective and key data, one for structure, and fresh sheets for each calculation.
- Write down every number and your structure. Skip full sentences and anything you can hold in your head.
- Your notes are never scored, so do not waste time making them pretty. They exist to support your spoken answer, not to be presented.
- Build one fixed template and use it in every practice case until the layout is automatic and you can focus on the problem.
Can You Take Notes During a Case Interview?
Yes. You are expected to take notes during a case interview, and you should bring your own blank paper (for a virtual interview; in the office it’s usually provided) and a pen or two. Note-taking is a normal, encouraged part of the format at McKinsey, BCG, Bain, and every other firm that runs cases.
Here is the part most candidates misunderstand: your interviewer does not read or grade your notes. They watch how you think and how you communicate. Your notes are a private tool that supports both. That means there is no “correct” way your page has to look for someone else. It only has to work for you, under time pressure, without slowing you down.
So the goal is not neat handwriting. The goal is a layout you can trust to hold the case objective, the data, your structure, and your math without you losing any of it.
What to Write Down (and What to Skip)
The most common note-taking mistake is trying to write everything. You cannot transcribe a case and think about it at the same time. Capture what you will need later, and let the rest go.
| Always write down | Skip or shorten |
|---|---|
| The case objective and its success metric | Full sentences and word-for-word quotes |
| Every number, with its unit | Anything you can comfortably hold in your head |
| Your structure or issue tree | Decorative formatting and redrawing |
| Key data points from exhibits, implications, next steps | Repeating information already on the page |
| New facts revealed as the case unfolds | Notes you know you will never reread |
Numbers are non-negotiable. A single misremembered figure can derail your whole analysis, so write each one down with its unit the moment you hear it. For qualitative points, a keyword or two is usually enough to trigger your memory. This keeps your eyes up and your attention on the interviewer and the problem, which is where they should be.
The Note-Taking System: How to Lay Out Your Pages
This is the layout I give every coaching candidate. It is simple, it scales to any case, and it removes the guesswork so your working memory stays free for the actual problem.
Set Up Your First Sheet as Your Anchor
Your first sheet holds the information that stays true for the whole case. Split it into three zones:
- Top: client name and industry
- Middle: the background details you get in the prompt
- Bottom: the objective and how success is measured, circled so it stays visible
You will glance back at this sheet constantly. When you drift, the circled objective at the bottom pulls you back to what the client actually wants.
Turn Your Pages to Landscape
Consultants think in landscape. Turn your paper 90 degrees before the case starts. Landscape gives you roughly 40% more horizontal space than portrait, which is exactly what issue trees, case interview frameworks, and chart interpretation need to breathe. Cramped notes force cramped thinking.
Separate Structure, Data, and Math
Do not pile everything onto one page. Run three kinds of sheets:
- Structure sheet: your issue tree or framework for the problem
- Data sheet: findings, numbers, and insights as they arrive, laid out cleanly
- Scratch sheets: rough calculations and brainstorming, where neatness does not matter
Keeping analysis separate from insights means your clean data sheet stays readable when you need to synthesize at the end, while your messy math lives somewhere else.
Start a Fresh Sheet for Every Math Question
Whenever a new case math problem starts, start a new sheet. You never know how long the calculation will run. I have seen countless candidates run out of room mid-equation, jump to a new page, then lose the number they needed from the previous one. A fresh sheet per calculation costs you nothing and prevents a whole class of avoidable errors.
Paper or Digital? Note-Taking in a Virtual Case Interview
With so many first rounds now happening over video, this is the question I get most, and the honest answer is: use paper, even on Zoom. Handwriting lets you draw issue trees, arrows, and quick charts that are slow and clumsy to reproduce in a text document, and it keeps your eyes on the camera instead of on a cursor. For almost every candidate, paper wins in a virtual interview for the same reasons it wins in person.
If your handwriting collapses at speed and you genuinely prefer typing, digital can work, with two conditions. First, practice your entire setup in mock interviews so it is second nature, not something you are figuring out live. Second, tell the interviewer at the start that you will be typing notes, because silent typing on camera can look like distraction (they might also prevent you from doing that because you could be feeding AI with the case information). A tablet with a stylus is a strong middle ground: you keep handwriting and drawing while staying fully digital.
Whatever you choose, sort out the physical setup before interview day. Have your paper, pens, and a hard surface ready, and if you use a second screen for the video call, position it so you are not constantly looking away from the camera.
For more on this, see our guide on how to approach online case interviews.
Abbreviations and Symbols That Keep You Fast
You will never keep pace with a case if you write in full words. Build a personal shorthand and drill it until it is automatic. Instead of “The client is wondering why profits have fallen over the last five years,” write “5yr P ↓?”
| Symbol | Meaning |
|---|---|
| R / C / P | Revenue / Cost / Profit |
| ↑ / ↓ | Increase / decrease |
| → | Leads to, therefore |
| Δ | Change in |
| # | Number of |
| K / M / B | Thousand / million / billion |
| ~ | Approximately |
| ? | Open question to resolve |
The specific symbols matter less than consistency. Pick a set, use the same one in every practice case, and it becomes a language you read instantly under pressure.
Note-Taking Differs by Firm: Interviewer-Led vs Candidate-Led
How you use your notes shifts with the case format. In interviewer-led cases, like the McKinsey case interview, the interviewer walks you through a series of distinct questions. Head each new sheet with the question you are answering, so your notes track the interviewer’s path. See how McKinsey structures its interviews for the full format.
In candidate-led cases, common at BCG and Bain, you drive the case forward. Here your structure sheet does more work, because you are the one deciding which branch to explore next, and you need to see your whole issue tree at a glance to choose well. Either way the layout is the same.
The emphasis just changes.
Do Not Fall Into the Pretty-Notes Trap
Because notes feel like a deliverable, candidates over-invest in them. They color-code, rewrite for neatness, and lose precious seconds making a page look good that no one will ever see.
When I interviewed candidates, I cared about the quality of their thinking and how clearly they walked me through it, never how tidy their paper was. Your notes are scaffolding for your spoken answer.
What earns points is guiding the interviewer through your logic top-down, which is a matter of case interview communication, not penmanship. If a nicer page does not make your answer clearer, it is wasted effort. Find a process that works, then stop thinking about it.
How to Practice Case Interview Note-Taking
Note-taking gets better the same way every case skill does: deliberate reps until it is automatic. Work these into your prep.
- Lock in one template. Use the exact layout above from your very first practice case, so the format is muscle memory before interview day.
- Drill case openings under time. Practice just the first two minutes, prompt to structure, on repeat. That is where note-taking pressure peaks.
- Paraphrase as you write. Restate information in your own words to lock it in, but keep technical terms and numbers exact.
- Ask for a repeat when you miss something. It is completely fine to ask the interviewer to restate a figure. Better a quick clarification than a wrong number.
- Practice on real cases. Run full cases with a partner or a coach so your notes hold up during live pressure, not just quiet solo reps.
Consistent practice is what turns note-taking from a distraction into a background habit, freeing you to focus on the only thing that matters: cracking the case. At StrategyCase, this is one of the first mechanics we lock in with coaching candidates, because it quietly lifts everything else.
Case Interview Note-Taking: FAQ
Can you take notes during a case interview?
Yes, and you are expected to. Bring your own blank paper and pens. Interviewers do not read or grade your notes, so treat them as a private tool for organizing your own thinking and supporting what you say out loud.
Should you take notes on paper or a laptop in a virtual case interview?
Use paper even over video. Handwriting lets you draw issue trees and charts and keeps your eyes on the camera. If you strongly prefer digital, practice the setup first and tell the interviewer you will be typing, or use a tablet with a stylus.
What should you write down in a case interview?
Always capture the objective, every number with its unit, your structure, and key data from exhibits. Skip full sentences and anything you can hold in your head. The aim is to record enough to support your analysis without falling behind the conversation.
Do interviewers look at your notes?
No, they never review your notes and they are not scored. That is exactly why you should not waste time making them look polished. Spend that effort on clear, top-down verbal communication instead.
How many sheets of paper do you need for a case interview?
Usually a handful. Plan for a first anchor sheet, a structure sheet, a data sheet, and a fresh sheet for each calculation. Number your pages so you can flip back without losing earlier information.
How do you take notes quickly in a case interview?
Use a consistent set of abbreviations and symbols, write in keywords rather than sentences, and keep your pages in landscape. Speed comes from a layout and shorthand you have practiced enough that they are automatic.
Related Guides
- The Pyramid Principle in case interviews
- How to be MECE in a case interview
- Market sizing case interviews
- Case interview examples from McKinsey and others
Build the Habits That Win Offers
Clean note-taking is one habit inside a much larger set of mechanics that separate offers from rejections. If you want to build all of them the right way from the start, the StrategyCase Case Interview Academy gives you 14+ hours of video training plus hundreds of realistic drills, built by a former McKinsey consultant and top global case coach.
You will learn to structure problems, brainstorm, interpret charts, handle case math, and communicate with the clarity top firms expect. For targeted feedback on your live performance, a few coaching sessions will show you exactly where your notes and your thinking break down under pressure.
About the author: Florian Smeritschnig is a former McKinsey Senior Consultant and the founder of StrategyCase.com. He spent 5 years at McKinsey, and has since delivered 2,200+ mock interviews and coaching sessions, helping 700+ candidates land offers at McKinsey, BCG, Bain, and other top firms.
