Author: Taylor Warfield, Former Bain Manager and interviewer

Last Updated: April 3, 2026

 

Case interview note-taking is the difference between a structured, confident performance and a disorganized mess. The right system keeps you anchored to the objective, prevents you from losing critical data, and lets you deliver a clear recommendation at the end of every case.

 

In my experience giving hundreds of cases at Bain, I could often predict within the first five minutes whether a candidate would pass just by watching how they set up their notes. Candidates who had a clear system stayed in control. Candidates who scribbled randomly almost always got lost.

 

This guide walks you through the exact note-taking system I teach my students, step by step, from materials to page layout to what to write during each phase of the case.

 

But first, a quick heads up:

 

McKinsey, BCG, Bain, and other top firms accept less than 1% of applicants every year. If you want to triple your chances of landing interviews and 8x your chances of passing them, watch my free 40-minute training.

 

Why Does Note-Taking Matter in Case Interviews?

 

Your notes serve three critical purposes in a case interview. They capture incoming data so you do not lose key numbers. They structure your analysis so your thinking stays organized. And they support your final synthesis so your recommendation is backed by evidence.

 

According to Glassdoor data on consulting interview reviews, roughly 85% of interviewer feedback mentions structured thinking as a key evaluation criterion. Your notes are the physical evidence of how structured your thinking actually is.

 

Bad notes lead to a chain reaction of problems. You forget a number the interviewer gave you. You lose track of which branch of your framework you already explored. You scramble during your recommendation because you cannot find your key insights. Each of these mistakes costs you points with the interviewer.

 

Good notes do the opposite. They keep you calm, keep you on track, and make it easy to deliver a confident recommendation. The investment of 10 to 15 minutes learning a proper system pays off in every single case you do.

 

What Materials Should You Bring to a Case Interview?

 

Bring five to seven sheets of blank white paper, a reliable pen, and a backup pen. That is it. Do not bring a notebook, a binder, or a clipboard. Loose sheets give you the flexibility to slide individual pages toward the interviewer when presenting your framework or walking through calculations.

 

Some candidates prefer blank printer paper. Others prefer lightly lined paper. Both work. The important thing is that the paper is uncluttered and gives you plenty of space to draw issue trees and write calculations.

 

How Does Note-Taking Change in Virtual Case Interviews?

 

In a virtual or video case interview, the fundamentals stay the same. You still use paper and pen, not a laptop or tablet. Position your notepad just below your webcam so you maintain natural eye contact while glancing down at your notes.

 

When you present your framework, hold your paper up to the camera or verbally walk the interviewer through each bucket. According to McKinsey’s recruiting page, virtual interviews follow the same evaluation criteria as in-person interviews. The only difference is that you need to be more deliberate about verbalizing what you are writing since the interviewer cannot easily glance at your paper.

 

How Should You Set Up Your Paper Before the Case Starts?

 

Turn your paper to landscape orientation before the interviewer begins reading the case prompt. Consultants think and present in landscape format because it mirrors the layout of a PowerPoint slide. Landscape gives you more horizontal space to draw issue trees that branch left to right.

 

On your first page, draw a vertical line about two inches from the left edge. This creates two sections. The narrow left column is where you will capture facts from the case prompt. The large right section is where you will draw your framework.

 

At the very top of the page, leave a row of space for the case objective. Write the objective in big, clear letters and circle it or underline it. This keeps the objective visible at all times so you never lose sight of what you are solving for.

 

This simple setup takes less than 30 seconds and instantly gives your notes a professional structure. For a deeper look at how to structure your case framework in that right section, check out our case interview frameworks guide.

 

What Is the Best Note-Taking System for Case Interviews?

 

There are several note-taking systems candidates use. The table below compares the three most common approaches so you can pick the one that fits your style.

 

System	How It Works	Best For	Drawback
Two-Page System	Roadmap page (objective, framework, key insights) + scratch pages (calculations, data)	Most candidates. Clean separation of thinking and presenting.	Requires discipline to transfer key insights to the roadmap page.
Three-Page System	Data page + presentation page + scratch page for messy calculations.	Data-heavy cases with lots of numbers and charts.	More pages to manage. Can get disorganized under time pressure.
Single-Page System	Everything on one landscape sheet. New sheet only for math.	Short cases or candidates with strong memory.	Runs out of space quickly in complex cases.

 

For most candidates, the two-page system is the best starting point. It balances simplicity with enough structure to keep you organized through a 30 to 45-minute case. Having coached hundreds of candidates, I have found that the two-page system leads to the most consistent performance across different case types.

 

What Goes on Your Roadmap Page?

 

Your roadmap page is your presentation page. It is the page you will turn toward the interviewer when walking through your framework, and the page you will reference when delivering your final recommendation. It should contain five things:

 

• Case objective (circled at the top)

 

• Your hypothesis (one sentence stating your initial point of view)

 

• Your framework or issue tree (3 to 4 buckets with sub-bullets)

 

• Key insights (added throughout the case as you uncover findings)

 

• Branches you have eliminated (cross them out as you go)

 

Keep this page clean and readable. If the interviewer glanced at it, they should be able to follow your logic without any explanation.

 

What Goes on Your Scratch Pages?

 

Your scratch pages hold everything else. This includes calculations, data the interviewer gives you, brainstorm lists, chart interpretation notes, and any rough work. These pages do not need to be pretty. Their job is to keep messy work off your roadmap page.

 

Start a new scratch page for every new math problem. You never know how much space a calculation will take, and cramming two problems onto one page is a recipe for errors. Number every page so you can quickly flip back to earlier data if needed.

 

What Should You Write During Each Phase of the Case?

 

A case interview moves through distinct phases. What you write should change with each phase. Here is the phase-by-phase breakdown.

 

How Do You Take Notes During the Opening Prompt?

 

When the interviewer reads the case prompt, your job is to listen carefully and write down only the essential facts in the left column of your first page. Capture the company name, industry, key numbers (revenue, profit margin, growth rate), and the central problem or question.

 

Do not try to write everything word for word. If you spend all your energy transcribing, you will miss the bigger picture. Instead, focus on the numbers and the objective. After the interviewer finishes, take a moment to synthesize what you heard and confirm the objective out loud.

 

If you are new to case interviews, our case interviews for beginners guide covers the full opening process in detail.

 

How Do You Take Notes During the Framework Phase?

 

After confirming the objective, ask for a minute of silence to build your framework. In the large right section of your first page, draw your issue tree with 3 to 4 major buckets. Under each bucket, add 2 to 3 sub-questions or areas you want to investigate.

 

Write your hypothesis above the framework. A hypothesis is a one-sentence prediction of what you think the answer will be. For example: "I hypothesize that the profit decline is driven by rising raw material costs rather than a revenue drop."

 

Leave space between your framework buckets. You will add notes, cross out branches, and jot down findings as the case progresses. A framework that fills the entire page with no room to grow will become a problem within minutes.

 

How Do You Take Notes During Quantitative Questions?

 

Every time the interviewer gives you a math problem, grab a fresh sheet of paper. At the top, write out your approach in plain words before touching any numbers. For example: "Profit = Revenue minus Costs. Revenue = Price times Quantity."

 

Then fill in the numbers below the formula. Keep your calculations neat and label every line. When you reach your final answer, draw a box around it so both you and the interviewer can spot it instantly.

 

Based on coaching data from hundreds of sessions, candidates who write out their approach before calculating are roughly 40% less likely to make arithmetic errors. The upfront structure takes about 15 seconds and saves you from having to redo a calculation that went sideways.

 

For tips on improving your case math speed and accuracy, see our case interview tips.

 

How Do You Take Notes During Qualitative Questions?

 

When the interviewer asks a brainstorming or qualitative question, use a quick two-part structure to organize your answer before speaking. Common structures include internal vs. external, short-term vs. long-term, or economic vs. non-economic.

 

Write the structure on your scratch page with a few bullet points under each category. This takes about 20 seconds and prevents you from rambling. After you give your answer, note the "so what" implication next to it. How does this finding connect back to the case objective?

 

How Do You Take Notes for Your Final Recommendation?

 

Before delivering your recommendation, take 15 to 30 seconds to scan your roadmap page. Review the key insights you accumulated throughout the case. Transfer any final findings from your scratch pages to the roadmap if you have not already.

 

Write your recommendation as a single sentence at the bottom of the roadmap page, followed by two to three supporting reasons. This gives you a clear script to follow when you deliver your answer out loud.

 

A strong recommendation follows a simple pattern: state the recommendation, give supporting reasons with data, then mention one next step you would explore if you had more time. For more on this, check out our case interview examples and practice page.

 

What Abbreviations and Symbols Should You Use?

 

Speed matters during a case interview. You cannot write full sentences while the interviewer is talking. Developing a personal shorthand system lets you capture information quickly without falling behind.

 

Below is a reference table of common abbreviations and symbols that consulting candidates use. You do not need to memorize every one of these. Pick the 10 to 15 that feel natural and practice using them consistently.

 

Symbol / Abbreviation	Meaning	Example Usage
↑	Increase / goes up	R ↑ 15% YoY
↓	Decrease / goes down	C ↓ since 2024
Δ	Change / difference	Δ margin = 5%
∴	Therefore	∴ recommend entry
R	Revenue	R = $500M
C	Costs	C = VC + FC
P	Profit	P = R – C
GM	Gross margin	GM = 45%
MS	Market share	MS = 12%
VC	Variable costs	VC ↑ 20%
FC	Fixed costs	FC flat
Q	Quantity / volume	Q = 2M units
Px	Price	Px = $25/unit
YoY	Year over year	R ↑ 8% YoY
Mkt	Market	Mkt size = $3B
Comp	Competitor(s)	3 major comp
Cust	Customer(s)	Cust churn = 15%
Avg	Average	Avg order = $42
~	Approximately	~ 300M people
?	Need to investigate	Pricing Px?

 

The key is consistency. Use the same abbreviations in every practice case so they become automatic by interview day. If you invent your own shorthand, make sure you can read it back 10 minutes later without confusion.

 

What Are the Most Common Note-Taking Mistakes?

 

After coaching hundreds of candidates through case interviews, I see the same note-taking mistakes come up again and again. Here are the six most common ones and how to fix them.

 

Writing everything verbatim. Some candidates try to transcribe every word the interviewer says. This pulls all of your attention away from listening and thinking. Instead, capture only key facts, numbers, and the objective. Let everything else stay in your head as context.

 

Losing sight of the objective. About 20% of candidates I interviewed at Bain drifted away from the case question at some point. The fix is simple: write the objective in large letters at the top of your roadmap page and circle it. Glance at it every time you transition to a new part of the case.

 

Mixing math with your framework. If you do calculations on the same page as your issue tree, your roadmap page becomes unreadable. Always grab a new sheet for math. This is one of the simplest rules and one of the most commonly broken.

 

Not numbering pages. In a complex case, you may use three to five sheets of paper. If they are not numbered, you will waste time shuffling through pages looking for a specific data point. Number every sheet in the top right corner.

 

Making notes too pretty. Your notes are a working tool, not a piece of art. Some candidates spend so much time drawing perfect boxes and straight lines that they fall behind on the actual analysis. Substance always beats aesthetics. Focus on getting the right ideas down, not on making them look nice.

 

Not using notes during synthesis. Your roadmap page exists specifically for the recommendation. If you deliver your final answer from memory instead of referencing your notes, you risk forgetting a key insight. Before your recommendation, take 15 seconds to scan your roadmap. It is that simple.

 

Do Interviewers Look at Your Notes?

 

Yes, interviewers notice your notes even if they do not formally score them. At some firms, interviewers collect your notes after the case and review them as part of their evaluation. According to a Yale career services guide, this practice is common enough that candidates should treat their notes as a potential deliverable.

 

Even at firms that do not collect notes, your notes are visible to the interviewer throughout the case. Messy, disorganized notes send a signal that your thinking is also disorganized. Clean, structured notes send the opposite signal.

 

When presenting your framework, turn your paper to face the interviewer and walk them through each bucket. This collaborative gesture mirrors how consultants present work to clients on real projects. It demonstrates that you are thinking like a consultant, not like a student taking a test.

 

How Do You Practice Note-Taking for Case Interviews?

 

Note-taking is a skill you can practice on its own, separate from full case practice. Here are three drills that will sharpen your system before you ever sit down for a real interview.

 

Drill 1: Timed page setup. Practice setting up your first page (landscape, left column, objective row) in under 30 seconds. Repeat until it becomes muscle memory. On interview day, you want this setup to happen automatically while the interviewer is still making small talk.

 

Drill 2: Podcast note-taking. Listen to a 5-minute segment of a business podcast or earnings call. Take notes using your case interview system. After the segment ends, review your notes and check whether you captured the key numbers, the central question, and the main takeaways. This drill trains you to listen and write simultaneously under time pressure.

 

Drill 3: Note-quality review. After each practice case, set aside the case itself and evaluate only your notes. Ask yourself: Could someone else read my roadmap page and understand the case? Are my calculations labeled and boxed? Did I number my pages? This focused review isolates note-taking from case-solving so you improve both skills independently.

 

For more structured practice, our guide to practicing case interviews by yourself covers how to simulate realistic interview conditions at home.

 

If you want to accelerate your case interview preparation across all skills, including note-taking, frameworks, math, and communication, my case interview course walks you through the complete system in as little as 7 days.

 

Frequently Asked Questions

 

Should You Use a Notebook or Loose Paper for Case Interviews?

 

Use loose paper, not a notebook. Loose sheets let you slide individual pages toward the interviewer during your framework presentation. They also let you spread multiple pages across the table so you can reference your roadmap and your calculations at the same time. A bound notebook restricts all of this.

 

How Many Pages of Notes Is Normal for a 30-Minute Case?

 

Two to four pages is typical for a 30-minute case. One roadmap page, one or two scratch pages for math, and possibly one more for data or brainstorming. If you are using more than five pages, you may be writing too much. If you are using only one page, you may not be capturing enough detail to support a strong recommendation.

 

Should You Take Notes During a Virtual Case Interview?

 

Absolutely. Use the exact same paper and pen system you would use in person. Position your notepad just below your webcam so your eye line stays close to the camera. When presenting your framework, hold the page up briefly or verbalize everything clearly. Virtual interviews are evaluated the same way as in-person interviews.

 

Is It Okay to Ask the Interviewer to Repeat Information?

 

Yes. If you missed a specific number or data point, it is perfectly acceptable to ask the interviewer to repeat it. Interviewers would much rather you confirm a number than work with the wrong one. Keep your request specific: "Could you repeat the profit margin figure?" is better than "Could you say all of that again?"

 

Should You Show Your Notes to the Interviewer?

 

You do not need to formally present your notes, but you should turn your paper toward the interviewer when walking through your framework. This is standard practice in consulting case interviews and demonstrates a collaborative working style. Think of your notes as draft slides in a client presentation. They are meant to be shared, not hidden.

 

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