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Bain Case Interview Examples: A Worked Practice Case

Bain cases are conversational and candidate-led, and they reward an answer-first, numbers-driven style. Work through a full Bain-style case step by step, check your math as you go, and compare your answers to a model response.

By the Case Prep Team Updated October 1, 2026 16 min read

Candidate-ledYou drive the conversation

2 roundsTypical after the online test

Online testBefore any interviews

Written caseUsed in some offices

Start the practice case Read the Bain interview guide

Format

What makes Bain cases different

Bain is part of MBB alongside McKinsey and BCG, but its cases feel different. They are more conversational, and you are expected to lead: propose a structure, decide what to analyze first, and keep moving toward an answer.

Lead with a hypothesis

Bain interviewers like candidates who state an early view and then test it. Saying "I suspect the issue is X, so I would check Y first" shows the commercial instinct Bain looks for.

Numbers carry the case

Bain cases lean quantitative, and market sizing comes up often. Clean, fast math with a sense check on every answer matters more than an elaborate framework.

It should feel like a conversation

Partners in later rounds often push back, change direction, and test your assumptions. Stay calm, engage with the challenge, and adjust your view when the data calls for it.

Bain publishes its own case interview prep page with sample cases, tips, and preparation materials: Bain case interview preparation. Work through those alongside the case below.

Case types

Case types Bain candidates report

These five themes cover most Bain cases. Each example prompt below is an original Bain-style prompt, not a real interview question. Pick a tab to see how you would structure it and what math to expect.

Example prompt: A national fashion retailer's revenue has fallen for five years. What is going on?
How to structure it: Split revenue into customers, visits, conversion, and spend per visit, by channel. Compare each with competitors to find where the decline started.
Math to expect: Revenue trees, like-for-like growth, and margin by channel.

Practice case

Worked practice case: Kindred Pet Foods

This is an original case written in the style Bain candidates describe: market sizing, customer economics, a break-even calculation, and a recommendation built on the numbers. In a live interview you would drive the structure yourself. Here, each step shows the question an interviewer would likely ask next.

Answer each step out loud or on paper before you reveal the model answer. The suggested times match a strong candidate's pace.

New productConsumer goodsAbout 25 minutes

Kindred Pet Foods: should it launch fresh dog food?

Your client is Kindred Pet Foods, a US maker of premium dry dog food sold through pet stores and grocery chains. Fresh, refrigerated dog food delivered to the door by subscription has grown quickly, and Kindred's CEO wants to know whether the company should launch its own fresh subscription brand. She has asked Bain for a recommendation. How would you approach this?

If you ask clarifying questions, the interviewer shares:

Kindred has never sold directly to consumers.
Several venture-backed fresh dog food brands already sell online.
The CEO wants the new business to break even within three years.

0 of 6 steps revealed

Structure the problem

Take about 2 minutes

Interviewer: How would you approach this?
My initial hypothesis is that the market is attractive, but the decision depends on whether Kindred can acquire and keep customers profitably against established online brands. I would test that across four areas:
- Market: how big the fresh segment is, how fast it is growing, and who buys it.
- Customer economics: what each customer is worth over their lifetime versus what it costs to win them.
- Competition and capabilities: how strong the current brands are, and whether Kindred can handle refrigerated delivery and direct sales.
- Effect on the core business: how many fresh customers would come from Kindred's own dry food buyers.
Why it works: opening with a hypothesis, then saying how you will test it, is the Bain style. It also flags the real crux, customer economics, from the start.
Size the market

Take about 3 minutes

Interviewer: Let's start with the market. How big is the US market for fresh dog food subscriptions?

Market size ($B)
A clean way to build it:
- About 130M US households, and roughly 40% own a dog: 52M households.
- Assume 10% would pay for premium fresh food: 5.2M households.
- Assume they spend about $100 a month, or $1,200 a year.
5.2M times $1,200 is about $6.2B a year. As a sense check, that would be a meaningful but plausible slice of total US dog food spending, so the market is worth pursuing.

State every assumption out loud and round to clean numbers. Interviewers care more about a logical build and a sense check than the exact figure.
Work out customer value

Take about 3 minutes

Interviewer: Here is what the interviewer shares about a typical subscriber. How much is a customer worth over their lifetime, in contribution?

Exhibit 1: Expected subscriber economics

Measure Value

Revenue per customer per month $100

Gross margin 40%

Share of customers who cancel each month 5%

Cost to acquire one customer $150

Illustrative data for practice.

Lifetime value ($)
Find the break-even point

Take about 3 minutes

Interviewer: Running the business, including the refrigerated delivery network and marketing team, costs $24M a year in fixed costs. How many active customers does Kindred need to break even?

Active customers needed
Test the risks

Take about 2 minutes

Interviewer: What could make this launch fail?
- Customers: cancellation could run higher than 5%, which would cut lifetime value sharply.
- Competition: established brands already spend heavily on online marketing, which could push the cost of winning a customer well above $150.
- Operations: refrigerated delivery is new to Kindred, and spoilage or late deliveries would drive cancellations.
- Own sales: if many fresh customers are existing Kindred dry food buyers, the company partly replaces sales it already had.
Each risk ties back to a number from earlier in the case. That shows the interviewer you know exactly which assumptions could break the answer.
Make the recommendation

Take about 1 minute

Interviewer: The CEO asks for your recommendation. What do you say?

Measure	Value
Revenue per customer per month	$100
Gross margin	40%
Share of customers who cancel each month	5%
Cost to acquire one customer	$150

Math

Bain case math quick check

Bain cases lean quantitative, and market sizing comes up often. Try these four without a calculator, and aim for under a minute each.

A city has 2 million people. 30% buy a coffee out every day at $4. How big is the city's annual coffee-out market, assuming 360 days a year?

Market size ($M)

5% of a company's subscribers cancel each month. How many months does the average subscriber stay?

Months

A business has $50M in revenue and an 18% profit margin. What is its profit?

Profit ($M)

Revenue grew from $100M to $121M over two years at a steady rate. What was the annual growth rate?

Annual growth (%)

Assessment

Before the interviews: the online test

For most consulting roles, Bain screens candidates with a digital assessment before any case interviews. The test you get depends on your office and role, and candidates report formats including SOVA and TestGorilla.

Both guides walk through the format and how to prepare: the Bain SOVA assessment guide and the Bain TestGorilla assessment guide.

Other formats

Written case and Bain fit

The written case

Some Bain offices add a written case to the second round. You review a set of slides or data on your own, prepare a few slides with your answer, and then present and discuss them with an interviewer. Decide your recommendation early, write each slide title as the takeaway, and flag any assumptions.

Bain fit

Bain puts real weight on fit. Interviewers want to see that you are someone the team would enjoy working with, as well as someone who gets results. Prepare stories that show leadership, teamwork, and impact, and have a specific answer to "Why Bain?" that goes beyond reputation.

Prep plan

A two-week prep plan for a Bain case

Days 1 to 3
Practice opening cases with a hypothesis and a tailored structure. Start with the frameworks guide.
Days 4 to 6
Do market sizing daily until you can build and sense-check an estimate in under three minutes.
Days 7 to 8
Drill math: lifetime value, break-even, margins, and growth rates.
Days 9 to 11
Run full candidate-led cases with a partner, including Bain's own sample cases. Redo Kindred from memory and time yourself.
Days 12 to 14
Prepare fit stories and a specific "Why Bain?" Have your partner push back hard mid-case so you get used to defending your view.

Keep preparing

Bain interview guideRounds, formats, and what Bain fit means. Bain salariesPay by level, including bonus ranges. Bain application deadlinesDates and timeline for the next cycle. Bain SOVA guideHow the online assessment works.

FAQ

Frequently asked questions

Are Bain case interviews candidate-led?

Yes, mostly. You are expected to set the structure, decide what to analyze, and drive toward a recommendation, though interviewers will share data and redirect you along the way.

What kind of cases does Bain give?

Profitability, market sizing, private equity, new product, and customer strategy cases are all common. Bain cases lean quantitative, so expect real math.

Does Bain publish practice cases?

Yes. Bain's case interview preparation page has sample cases, tips, and preparation materials designed by its own team.

Does Bain use a written case?

Some offices add a written case to the second round, where you prepare a few slides on your own and present them.

What test does Bain use before interviews?

Most consulting candidates take a digital assessment first. Candidates report formats including SOVA and TestGorilla, depending on office and role.

Is the Kindred Pet Foods case a real Bain case?

No. It is an original practice case written to match the style Bain candidates describe. All numbers are illustrative.

Sources

Bain & Company, Case interview preparation. bain.com. Accessed October 2026.
Bain & Company, Interviewing. bain.com. Accessed October 2026.
IGotAnOffer, Bain case interview: how to prepare. igotanoffer.com. Accessed October 2026.
PrepLounge, Bain & Company Case Interview Guide 2026. preplounge.com. Accessed October 2026.

Case Prep is an independent practice platform and is not affiliated with, authorized by, or endorsed by Bain & Company. The Kindred Pet Foods case, example prompts, and all data on this page are original teaching material.