Author: Taylor Warfield, Former Bain Manager and interviewer

Last Updated: June 24, 2026

 

The Kepler Cannon case interview is a two-round process that pairs behavioral questions with a market sizing or financial services case, testing how clearly you structure ambiguous problems and how fast you run the math. This guide walks through every stage of the process, the exact case types you will face, a worked market sizing example, and the preparation that turns a strong resume into an offer.

 

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Key Takeaways

 

Kepler Cannon runs a focused two-round interview that rewards structured thinking, quick mental math, and genuine fit with a small, fast-moving team.

 

• The process usually runs two rounds: a 30-minute behavioral and market sizing screen, then a 45-minute case

 

• Cases lean toward market sizing and financial services strategy, matching the firm's fintech and payments focus

 

• Some cycles add a short pre-recorded video interview before the live rounds

 

• Glassdoor rates the interview difficulty 2.93 out of 5, so it is moderate rather than brutal

 

• The firm is highly selective and weighs culture fit as heavily as analytical skill

 

• Clear structure and fast mental math matter more than memorized frameworks

 

What Is the Kepler Cannon Case Interview?

 

The Kepler Cannon case interview is a short, interactive case given mostly in the second round, where a principal asks you to size a market or solve a financial services strategy problem. You think out loud, break the problem into clear buckets, run the math, and finish with a clear recommendation.

 

Kepler Cannon is a boutique strategy consulting firm headquartered in New York City, with additional offices in London and New Delhi. It was founded by former consultants from McKinsey and Mitchell Madison, and today it advises clients in banking, payments, insurance, wealth management, and healthcare.

 

Because the team is small, the case interview here feels more like a working conversation than a rigid exam. You will not get a 30-slide prompt or a long written exhibit. You get a sharp question, limited data, and an interviewer watching how you think.

 

That intimacy is the whole point of interviewing at a boutique consulting firm. The partners want to know you can sit with a client, handle ambiguity, and reason out loud without hiding behind a memorized template.

 

What Does the Kepler Cannon Interview Process Look Like?

 

The Kepler Cannon interview process usually has two live rounds after the application, and some cycles add a pre-recorded video interview up front. The first live round is a 30-minute screen with an Associate, and the second is a 45-minute case study with a Principal.

 

1. Application and resume screen: most candidates apply through a campus resume drop on Handshake, and the firm screens hard because it recruits from a short list of schools
   
   
2. Pre-recorded video interview: in some cycles you record a short video answering a mandatory "tell us about yourself" prompt plus one optional prompt, capped at about three minutes
   
   
3. First round: a 30-minute conversation with an Associate that covers behavioral questions and one quick market sizing question
   
   
4. Second round: a 45-minute case study with a Principal, sometimes requiring a high-level grasp of finance or financial services

 

Your application is where most people get cut, so a tight, results-driven consulting resume matters more here than at firms that interview half the class.

 

If you want a resume that survives a selective boutique screen, my resume review and editing service gives you unlimited revisions with a 24-hour turnaround.

 

Stage	Length	Who runs it	What it tests
Video interview	Up to 3 min	Recorded, no live interviewer	Communication and personality outside your resume
First round	30 min	Associate	Behavioral fit and one market sizing question
Second round	45 min	Principal	Full case study, often with a finance angle

 

What Types of Cases Does Kepler Cannon Ask?

 

Kepler Cannon cases skew toward market sizing and financial services strategy, which matches the firm's roots in fintech, payments, and banking. You should also be ready for profitability and market entry questions, plus an open-ended strategy prompt about a company you know well.

 

The most common format is a market sizing question with almost no data attached. Reported prompts include sizing a fintech market from scratch and estimating the number of planes in the sky right now.

 

Financial services strategy questions are the firm's specialty. You might be asked how a payments company should grow, how a bank should respond to a new competitor, or how an insurer should use data and AI to cut costs.

 

You may also see a classic profitability case interview or a market entry prompt. Both reward the same habit: break the problem into a clean structure before you touch a single number.

 

One favorite Kepler prompt asks you to redefine the strategy for a company you have worked at or studied. This rewards candidates who can apply real case interview frameworks to a business they actually understand.

 

Case interviews are central to landing an offer here. If you want to learn cases quickly, my case interview course walks you through proven structuring and math strategies in as little as 7 days.

 

How Do You Solve a Kepler Cannon Market Sizing Case?

 

To solve a Kepler Cannon market sizing case, state your assumptions out loud, build a simple top-down structure, do the arithmetic in clean round numbers, and sanity-check the final figure. The interviewer cares about your logic and your confidence with numbers, not a perfectly precise answer.

 

Here's an example in the firm's favorite flavor. Let's say the interviewer asks you to estimate the annual dollar volume flowing through a new peer-to-peer payments app in the United States by its third year.

 

1. Start with the population: assume the United States has about 335 million people
   
   
2. Find the adult base: assume roughly 75 percent are adults likely to use a payments app, which is about 250 million
   
   
3. Narrow to likely users: assume 60 percent are smartphone users open to a new app, which is about 150 million
   
   
4. Apply a market share: assume the app captures 10 percent of that base by year three, giving 15 million active users
   
   
5. Estimate usage: assume each active user sends about 200 dollars per month, or 2,400 dollars per year
   
   
6. Multiply and sanity-check: 15 million users times 2,400 dollars is roughly 36 billion dollars per year, which feels reasonable for a mid-size challenger app

 

Notice that every number is a clean, defensible assumption. The figures above are illustrative, so do not treat them as real market data. What earns points is naming each assumption, keeping the case interview mental math simple, and flagging where a real analysis would dig deeper.

 

In my experience interviewing candidates, the ones who stall are not bad at math. They freeze because they never said their assumptions out loud, so they lose the thread halfway through.

 

What Behavioral and Fit Questions Does Kepler Cannon Ask?

 

Kepler Cannon behavioral questions are conversational rather than scripted, and they probe whether you would thrive on a tight-knit team. Candidates report casual chats about what they did over the summer, standard questions about leadership and problem solving, and prompts drawn from the firm's own video interview.

 

The pre-recorded round asks you to answer a mandatory prompt, "tell us about yourself, meaning who you are outside your CV," then pick one optional question about a formative experience or a topic you love. Treat it like a real conversation, not a polished ad.

 

The firm openly uses an "airport test." Interviewers ask themselves whether they would want to be stuck in an airport with you for several hours, which means you should show curiosity about topics beyond your own work.

 

Strong answers still need structure. Practicing the consulting fit interview the same way you practice cases keeps your stories tight and specific under pressure.

 

If you want a faster way to prepare your stories, my fit interview course covers 98 percent of consulting behavioral questions in a few hours.

 

What Is Kepler Cannon Looking For in Candidates?

 

Kepler Cannon looks for sharp problem solvers who fit a small, entrepreneurial culture. Its own recruiting materials highlight a handful of traits, and your job in the interview is to show each one with a concrete example rather than just claiming it.

 

• Fast learning: show that you pick up new topics quickly, since boutique projects throw you into unfamiliar industries

 

• Leadership and teamwork: have substantive stories that prove you can drive a result and work with others

 

• Comfort with ambiguity: stay calm when a prompt gives you almost no data and ask sharp clarifying questions

 

• Attention to detail: be precise in how you set up and check your analysis, because small errors compound

 

• Genuine personality: pass the airport test by being someone the team and clients actually enjoy talking to

 

The firm is highly selective and recruits from select top colleges, but it actively welcomes non-conventional majors across STEM and the humanities. A strong quantitative mind matters more than a specific degree.

 

How Hard Is the Kepler Cannon Interview?

 

The Kepler Cannon interview is moderate in difficulty, with the selectivity of the application being the real hurdle. Based on self-reported Glassdoor reviews, candidates rate the interview experience 53.3 percent positive with a difficulty score of 2.93 out of 5.

 

By the same Glassdoor data, the hiring process averages about 26 days, and internship and associate consultant interviews are rated harder than associate and consultant rounds. The cases are described as light and straightforward, with one round sometimes leaning on basic financial services knowledge.

 

So the cases are not designed to break you. They are designed to see whether you can structure a fuzzy problem, do quick math, and hold a smart conversation, all at once.

 

How Should You Prepare for the Kepler Cannon Interview?

 

Prepare for Kepler Cannon by drilling market sizing, sharpening your mental math, and building tight fit stories that show curiosity and team fit. Below are the seven moves that matter most for this specific firm.

 

Tip #1: Drill market sizing until it is automatic

 

Market sizing shows up in the first round, so you cannot afford to fumble it. Practice 15 to 20 estimates out loud until naming assumptions and structuring a top-down approach feels routine.

 

Tip #2: Learn the financial services basics

 

One Kepler round can lean on a high-level grasp of banking, payments, or insurance. You do not need to be an expert, but you should understand how these businesses make money and where data and AI are reshaping them.

 

Tip #3: Speed up your mental math

 

The interviewer is watching your comfort with numbers as much as your final answer. Practice multiplying and dividing large round numbers quickly so you never lose momentum mid-case.

 

Tip #4: Build three or four strong fit stories

 

Have ready examples of leadership, problem solving, and teamwork that you can adapt on the fly. Make each one specific, with a clear result you personally drove.

 

Tip #5: Prepare for the airport test

 

Be ready to talk about something outside work that genuinely interests you. The partners want a colleague who is good company, not just a calculator.

 

Tip #6: Nail the video interview if you get one

 

If your cycle includes a pre-recorded round, rehearse until you sound natural in 90 seconds. Look at the camera, smile, and show a real personality instead of reading a script.

 

Tip #7: Practice live with a partner

 

Reading about cases is not the same as doing them under pressure. Running mock cases with a partner is the single fastest way to improve, and reviewing a list of case interview tips between sessions sharpens your habits.

 

If you want expert feedback fast, my interview coaching pairs you one-on-one with a former Bain interviewer to fix your weak spots before the real thing.

 

The Kepler Cannon case interview rewards candidates who structure ambiguity calmly, run clean math, and feel like a natural fit for a tight team, so the single most important thing you can do is practice cases out loud until that combination becomes second nature.

 

Frequently Asked Questions

 

How many rounds does the Kepler Cannon interview have?

 

Kepler Cannon typically runs two live rounds. The first is a 30-minute screen with an Associate that mixes behavioral questions with a market sizing question. The second is a 45-minute case study with a Principal. Some cycles add a short pre-recorded video interview before the live rounds.

 

Does Kepler Cannon give case interviews?

 

Yes. Kepler Cannon gives a market sizing question in the first round and a longer case study in the second round. Cases often have a financial services or fintech angle, since the firm focuses on banking, payments, insurance, and wealth management clients.

 

What kind of cases does Kepler Cannon ask?

 

Kepler Cannon leans on market sizing and financial services strategy cases. Reported examples include sizing a fintech market with no data given, estimating the number of planes in the sky, and redefining the strategy for a company you have worked at. Profitability and market entry cases also appear.

 

How hard is it to get into Kepler Cannon?

 

Kepler Cannon is highly selective and recruits from a short list of top schools, so landing an interview is the hard part. The interview itself is moderate. Glassdoor users rate the difficulty 2.93 out of 5 and the experience 53.3 percent positive based on self-reported reviews.

 

How long does the Kepler Cannon hiring process take?

 

Based on Glassdoor data, the Kepler Cannon hiring process averages about 26 days across self-reported interviews. Timelines vary by role, with internship and associate cycles sometimes running longer than full-time consultant cycles.

 

Does Kepler Cannon recruit from non-target schools?

 

Kepler Cannon recruits mainly from select top universities and is open about being highly selective. The firm welcomes non-conventional majors across STEM and the humanities, as long as you show strong problem-solving and quantitative skills. A standout resume and a referral both help if your school is not a core target.

 

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