EY-Parthenon Case Interview Practice: Free Case and Prep Resources
EY-Parthenon publishes one example case, on its Australia Strategy careers page: a client weighing a new electricity plant, worked in five questions with a suggested answer to each. It is an investment call, not a profit puzzle, so practice cases that end in invest, wait or walk; Deloitte, by contrast, publishes ten practice cases sorted by practice area.EY-Parthenon (opens in a new tab), read ; Deloitte (opens in a new tab), read
Try a free EY-Parthenon-style case now: FizzWave Diligence. No card, no signup.
Free, no signup: 2 worked cases with model answers. Free, no card: your first full practice case with an AI interviewer. Paid: Pro $49/month for every case.
Updated ·By Esteban Ronsin·Founder · former Deloitte and Accenture Strategy consultant
Built and reviewed with former McKinsey, BCG and Bain consultants and interviewers.
Free EY-Parthenon interview prep resources
EY-Parthenon interview prep resources: what you get, whether it is free or paid, and the link
EY-Parthenon's own description of its graduate interview rounds, how to prepare, and an example case on an electricity plant investment with a suggested answer to each question
Free. Published by EY-Parthenon, checked Nov 9, 2026
3 library cases matched to EY-Parthenon's case types, run out loud with an AI interviewer or step by step and scored on 7 skills; start with Craft Beverage Acquisition
Free + paid. The case list and a worked excerpt are public; a free account includes 1 full AI-graded case in voice or guided mode; Pro ($49/month) adds every case
Velmont Capital: M&A case with answers Industry: Consumer goods. Difficulty: medium.2 math questions.
Should private equity fund Velmont Capital buy outdoor apparel brand Cinderfell Outfitters at the $480 million asking price, and if not, what should it bid? 6 questions, 3 exhibits, a model answer for each
Free. The whole case and every model answer, no account; the practice button opens a live case like it
Quillfield Mechanical: M&A case with answers Industry: Industrial services. Difficulty: medium.2 math questions.
Should a commercial HVAC services company buy a regional competitor for $180 million, and what is the most it should pay? 6 questions, 4 exhibits, a model answer for each
Free. The whole case and every model answer, no account; the practice button opens a live case like it
EY-Parthenon fit and behavioral questions answered out loud, with follow-up probes and structured feedback (choose EY-Parthenon on the page)
Free + paid. 1 behavioral or Learning Mode session with a free account; Behavioral Unlimited ($39/month, behavioral and PEI only) or any Pro plan adds more
Firm-style cases are practice cases written for Road to Offer or adapted from university consulting club casebooks, not the firm's own cases. Road to Offer is independent and not affiliated with EY-Parthenon.
Try a free EY-Parthenon-style case now: no card, no signup
An original practice case written by Road to Offer in an EY-Parthenon-style format, not EY-Parthenon's own case. Everything stays in your browser.
FizzWave Diligence: Does FizzWave's growth plan hold?
Written as a commercial due diligence: a buyer tests the growth plan behind an asking price before it bids, the kind of work EY-Parthenon France lists for its Strategy team (growth plans, strategic due diligence, value creation plans). The full version, Craft Beverage Acquisition, runs the same deal as a buy-or-walk case. EY-Parthenon (opens in a new tab), read
1Step 1: Read the case
HopVentures, the leading US craft brewer, wants to grow beyond a slowing craft beer market and is looking at FizzWave, the third-largest US hard seltzer brand. FizzWave's owners ask 1.2 billion dollars, and their banker supports the price with a management plan that doubles revenue in four years. HopVentures asks you, before it bids: does the plan hold, and what should that mean for the price?
2Step 2: Ask clarifying questions
Open a question to hear the interviewer's answer.
Who is the buyer, and what is it deciding?
Interviewer: HopVentures: about 2.4 billion dollars of revenue and a fifth of US craft beer. It is deciding whether to bid the 1.2 billion dollars FizzWave's owners ask, bid less, or walk away.
What exactly does the plan say?
Interviewer: Revenue goes from 800 million to 1.6 billion dollars in four years, at today's 40% profit margin.
How big is hard seltzer, and how fast is it growing?
Interviewer: About 8 billion dollars in the US. It grew about 25% a year from 2020 to 2024; the forecast we have is about 15% a year from here.
Who does FizzWave compete with?
Interviewer: The two leaders hold about 30% and 25% of the market, FizzWave has about 10%, and several large domestic brewers are launching their own seltzers.
Where is FizzWave sold today?
Interviewer: In about 40% of US retail outlets. HopVentures' network reaches about 85% of US retailers and bars.
Is the plan for FizzWave on its own, or with a buyer's help?
Interviewer: The owners present it as FizzWave on its own.
3Step 3: Structure your answer
Take two minutes. Lay out how you would test whether FizzWave's plan holds, then say which part of it you would check first.
2:00
Show what a strong structure covers
Plays the question back as a test of the plan behind the price: 800 million to 1.6 billion dollars in four years, and what HopVentures should pay if it falls short.
Market: how much of the plan hard seltzer delivers anyway, and whether the slowdown from about 25% to about 15% a year keeps going.
Share: what FizzWave must win from the two leaders and from brewers entering, and what would let it win (brand, price, shelf space).
Reach: how much growth needs new stores, and whether those stores depend on HopVentures' network, which a standalone plan should not count.
Profit: whether a 40% margin survives more competition and the cost of new shelves.
Price: what FizzWave is worth on the plan, on market growth alone and in between, so the bid has a walk-away number.
Names the first check, the market forecast, because every other line of the plan rests on it.
4Step 4: The interviewer's next question
The market is about 8 billion dollars and expected to grow about 15% a year. If FizzWave only holds its 10% share, where is its revenue in four years, and how much of the plan is left to explain?
Show what a strong answer does
1.15 squared is about 1.32 and squared again about 1.75, so the market reaches about 14 billion dollars and FizzWave about 1.4 billion at a steady share. That leaves about 200 million of the 1.6 billion plan, a share of about 11.4%, to come from beating the leaders and the new entrants. A strong answer then asks whether that gap depends on shelves only HopVentures can provide: if it does, the plan charges the buyer for its own synergy, and the bid should not pay for it.
Flour costs rose 18% on a $4M flour bill, and prices went up 3% on $20M of sales. How much margin did Harbor lose?
Your answer
Flour went up by about $720K and the price rise brings in $600K, so the net hit is roughly $100K.
What worked
Split the change into a cost side and a price side before adding them up.
Could improve
$720K minus $600K is $120K, not $100K: state the exact net before rounding.
Model answer
Flour: 18% of $4M is $720K more cost. Price: 3% of $20M is $600K more revenue. Net margin loss: $120K.
Next time, say this
Cost is up $720K and price brings back $600K, so Harbor loses $120K of margin.
3
1
Choose a case
Cases matched to EY-Parthenon's case types.
2
Solve it out loud
An AI interviewer asks, listens and follows up.
3
Get answer feedback
Feedback on every answer: what worked, what to fix.
What makes EY-Parthenon interviews different
Blind case interviews.
In Australia, the interviewer in each first-round problem-solving interview knows nothing about you until you meet, so the case is judged on how you work it. Source: EY-Parthenon, read (opens in a new tab)
Invest, wait or walk.
EY-Parthenon's one published example case is an investment decision that ends on whether to invest now or wait while prices are uncertain, not on a profit diagnosis. Source: EY-Parthenon, read (opens in a new tab)
Approach over answer.
EY-Parthenon France's recruitment brochure says it does not ask candidates to actually solve the case; it gauges how you approach the problem and the steps you set to solve it. Source: EY-Parthenon, read (opens in a new tab)
No scripts, no stock frameworks.
EY-Parthenon Australia asks you to focus less on reciting a script or a pre-researched framework, and more on engaging with the problem and structuring your thoughts clearly. Source: EY-Parthenon, read (opens in a new tab)
A different process in each country.
EY-Parthenon US says hiring processes, needs and timelines vary by country and are run by each country: the Netherlands tests first, Paris has three rounds, Germany gives feedback after the first interview. Source: EY-Parthenon, read (opens in a new tab)
Each arrow opens the source: EY-Parthenon, read Nov 9, 2026.
Key facts from EY-Parthenon's own pages
One example case.
EY-Parthenon Australia's Strategy page works a single investment case in five questions with an answer to each; it is the only worked case on the EY-Parthenon careers pages we read for the US, Australia, the Netherlands, France and Germany. Source: EY-Parthenon, read (opens in a new tab)
Round one is a numerical test, a recruiter interview and two case interviews; the final round is three interviews with an Associate Partner or Partner. Source: EY-Parthenon, read (opens in a new tab)
Both US programs describe a mix of behavioral and case-based interviews with several EY-Parthenon professionals, and offer decisions typically within a week. Source: EY-Parthenon, read (opens in a new tab)
Each arrow opens the source: EY-Parthenon, read Nov 9, 2026.
EY-Parthenon's example case and prep pages, item by item
Each question of EY-Parthenon Australia's example case, then EY-Parthenon's own prep pages by country. Each line is our summary of the page; the processes differ, so read the one for the office you applied to. Read on EY-Parthenon's site .
EY-Parthenon's example case and prep pages, item by item: level, area and what each one is, linked to EY-Parthenon's page
EY-Parthenon's own advice: engage with the problem instead of reciting a framework, listen and ask questions, talk through your structure, and read financial news.
How Paris assesses cases: your approach rather than a solved case, sub-questions built on key assumptions, priorities, a results-based conclusion, and client-style engagement.
Paris's three rounds, from a written quantitative test to an Equity Partner interview, the SMART, NICE and DRIVEN values, and examples of the questions its clients ask.
The one-hour online interview (CV, a case on a real client question, your questions) with personal feedback, then an Assessment Day ending in a partner interview.
EY's behavioral interviewing: questions that start with "Give an example of", the three criteria answers are measured on, and 10 to 15 stories to prepare.
Worked: EY-Parthenon Australia's electricity plant case, in EY-Parthenon France's case tips
A client holds the option to invest in a new electricity generation plant. EY-Parthenon Australia's example takes it in five questions: the analyses that decide the investment, an estimate of Australia's annual energy use, what a thin capacity margin means for prices, and two on whether to invest when the project only just breaks even. Read the official case (opens in a new tab)(read )
How you might work it is ours, not EY-Parthenon's answer key.
1
Split the decision into sub-questions (question 1)
Put the decision as one test: over the plant's life, does the volume it sells times the price it gets beat the cost to build and run it, with risk priced in? Each term becomes a sub-question. Prioritize price, because it depends on every other plant in the market as well as on demand.
2
Estimate with stated assumptions (question 2)
EY's hints are in watts, so work in power first and convert to energy last: household demand off-peak and at peak, weighted by hours, times households, scaled up by the household share of total use, then times about 8,760 hours in a year. Say each assumption as you go; EY asks for ballpark numbers, not precision.
3
Turn the capacity numbers into a price view (question 3)
About 2 MW of headroom against peak demand growing 1 MW a year means peak supply runs short in about two years, so peak prices should rise. Then ask the interviewer what rivals have planned and how long a plant takes to build, because the same numbers are visible to every generator.
4
Recommend with conditions (questions 4 and 5)
Near break-even, the answer is a decision rule, not "it depends": invest now only if waiting would hand the opportunity to a rival; otherwise keep the option alive, for example by securing a site and approvals, and commit when prices are clearer. Name the trigger that would make you build.
5
Close on a results-based conclusion
End in two sentences a partner could repeat: the decision, the number behind it and the one thing to watch. For example: wait, but hold the site, and build once forward prices make the plant's value clearly positive, unless a rival commits first.
EY-Parthenon Australia says its problem-solving interviews assess how you think and approach a problem, rather than what you know, and simulate the strategy work its teams do. Source: EY-Parthenon, read (opens in a new tab)
Talk through your structure
The best candidates, EY-Parthenon Australia says, talk the interviewer through their structure and what they are thinking as they work, asking questions or offering observations along the way, and do not rush ahead to force a solution. Source: EY-Parthenon, read (opens in a new tab)
Structure, then a conclusion that adds value
EY-Parthenon France's brochure asks you to tell a story built on key assumptions, break the problem into sub-questions and prioritize them, show common sense in the analysis, and end with a results-based conclusion. Source: EY-Parthenon, read (opens in a new tab)
Smart, nice, driven
Paris names three values: structuring and reasoning skills, working in a team with kindness and humility, and a strong appetite for commitment, challenge and entrepreneurship. Source: EY-Parthenon, read (opens in a new tab)
Experience, action, result
EY US measures behavioral answers on three questions: did you give a relevant experience, did you explain the action you took, and did you say what it led to. Source: EY-Parthenon, read (opens in a new tab)
Each arrow opens the source: EY-Parthenon, read Nov 9, 2026.
The EY-Parthenon interview process, and what trains each step
1
Application
EY-Parthenon Australia asks for a CV, academic transcript and cover letter and says a business degree is not required. The Netherlands also asks for school and university grades and a motivation letter, and takes applications all year.
EY-Parthenon Netherlands opens its first round with a numerical test; Paris opens with a written quantitative test. EY-Parthenon's Australian, German and US pages name no test, so follow your invitation.
Two "blind" problem-solving interviews on a real-world business scenario: the interviewer knows nothing about you, and you work through qualitative and quantitative steps. EY-Parthenon says it wants to see how you think, not what you know, and that the best candidates talk through their structure as they work.
Australia's "traditional" interview, usually the same day as the cases, covers your experience and interests, why management consulting, and your understanding of EY-Parthenon Strategy. In the US, EY says it leans heavily on behavioral questions that start with "Give an example of".
A one-hour virtual interview in three parts: your CV, a case on a real client question, and your own questions, followed by personal feedback from the interviewer. If both sides continue, an Assessment Day follows with two interviews of the same shape, the first in English, then a partner interview.
The US Associate Program (undergraduate and master's) and Consultant Program (MBA) both describe a mix of behavioral and case-based interviews with multiple EY-Parthenon professionals, with offer decisions typically within a week. Neither gives a number of rounds or names a test.
In Paris, round two is a Manager or Director interview then a Director or Partner interview, and round three is a final interview with an Equity Partner; each covers your background, your motivation and a case based on a real project. The Netherlands' final round is three interviews with an Associate Partner or Partner.
Missing from EY-Parthenon's pages: whether cases are candidate-led or interviewer-led, how long each interview runs, how answers are scored, whether a written or group case is used, and the UK format, since EY UK's EY-Parthenon early careers address now shows only EY's general student page.
12 EY-Parthenon-style interview questions
In our words, not EY-Parthenon's, grouped by the kinds of question in EY-Parthenon Australia's example case, with what a strong answer does. Most end in an investment call, like EY's own example.
Lay out the analyses (like EY's question 1)
EY-Parthenon Australia: work through a logical set of qualitative and quantitative steps.
1A private equity fund is offered a chain of 120 veterinary clinics whose management plan grows revenue 12% a year for five years. Which analyses would you run to test the plan?
What a strong answer does: Splits the plan into market growth, share gains, price and new clinics, names the data that tests each (pet ownership, visits per pet, local rivals), and says which piece the plan leans on most.
2A utility asks whether to build a battery storage site next to its solar farm. What would you need to know?
What a strong answer does: Covers what the battery earns (the gap between daytime and evening prices, payments for grid services), what it costs to build and run, how long it lasts, and what rivals or policy could change.
3An infrastructure investor is weighing a stake in a regional airport. Where does the value come from?
What a strong answer does: Separates fees per passenger (often regulated) from commercial income per passenger (parking, shops), then ranks the passenger forecast first, since both depend on it.
EY-Parthenon Australia: ballpark estimates are fine, worked on paper.
4Estimate how many home electric vehicle chargers are installed in Australia each year.
What a strong answer does: Builds from new electric car sales, the share of buyers with off-street parking and the share who install a charger, states each assumption out loud and sanity-checks the result against total new car sales.
5How much electricity does a large data center use in a year?
What a strong answer does: Converts power to energy correctly (megawatts times about 8,760 hours), separates the computing load from cooling, and rounds early to keep the math clean.
EY-Parthenon France: show common sense and use what you know.
6A target's revenue grew 20% last year while its market grew 25%. What does that tell the investor?
What a strong answer does: Says the target lost share even while growing, asks why (distribution, price or product), and flags that any plan assuming share gains now needs evidence.
7Hospital beds in a region are 92% full and demand grows 3% a year. A client wants to build a private hospital. What follows?
What a strong answer does: Works out that demand passes capacity in about three years, then asks what public and private operators plan to add before calling it a gap worth building for.
Decide when it is close (like EY's questions 4 and 5)
EY-Parthenon France: end with a results-based conclusion.
8Your model values a target at about its asking price, and the fund's return lands just at its hurdle. Do you recommend the deal?
What a strong answer does: Gives a clear answer with the condition that would flip it (proof of the plan's share gains, or a lower price), names the riskiest assumption and the diligence that would settle it.
9A client can buy a competitor now or wait a year for the market to settle, but another bidder is circling. What do you weigh?
What a strong answer does: Compares what waiting would teach the client with the cost of losing the deal, suggests a way to keep the option (exclusivity, a staged stake) and lands on one recommendation.
10A fund has a week to decide on a consumer brand whose sales doubled in three years. What must be true to buy?
What a strong answer does: Names three tests (the market keeps growing, the brand holds share as bigger players enter, the price leaves room for the fund's return) and how to check each in a week.
EY US leans on behavioral questions that start with "Give an example of".
11Why EY-Parthenon, and why strategy rather than transactions?
What a strong answer does: Names the team you applied to and one kind of work it does (EY-Parthenon France lists growth plans and strategic due diligence), links it to something you have done, and stays under a minute.
12Give an example of a time you changed someone's mind with numbers.
What a strong answer does: Meets EY's three criteria in order: a relevant experience kept short, the action you took, and what it led to, ideally a result in numbers.
EY-Parthenon Australia asks you to rely less on a script or a pre-researched framework. Build the structure from the client's question, in your own words. Source: EY-Parthenon, read (opens in a new tab)
Rushing to a solution
EY-Parthenon Australia says to listen, ask questions if you need clarity, and not rush ahead to force a solution. Paris adds that it is not asking you to actually solve the case. Source: EY-Parthenon, read (opens in a new tab)
Ending on "it depends"
Two of the five questions in EY's own example ask whether to invest when the answer is close. Give a decision and the condition that would change it. Source: EY-Parthenon, read (opens in a new tab)
Preparing for another country's process
EY-Parthenon US says each country runs its own hiring process. The Netherlands opens with a numerical test and Paris with a written quantitative test; check your invitation. Source: EY-Parthenon, read (opens in a new tab)
Thin fit stories
EY US measures behavioral answers on a relevant experience, the action you took and what it led to, and suggests preparing 10 to 15 stories you can adapt. Source: EY-Parthenon, read (opens in a new tab)
Each arrow opens the source: EY-Parthenon, read Nov 9, 2026.
An EY-Parthenon prep plan, day by day
The order follows EY-Parthenon's own pages; the timing is our suggestion.
Days 1 and 2
Read your country's EY-Parthenon page
Note your rounds and whether a numerical or written test comes first. The processes differ between Australia, the Netherlands, France, Germany and the US.
Answer each of the five questions, out loud and timed, before you open EY's suggested answer. Then read Paris's tips and check you ended on a conclusion.
Prepare your "Why EY-Parthenon?" answer and 10 to 15 stories in EY's experience, action, result order, say them out loud, then do one full case under time.
How should I prepare for the EY-Parthenon case interview, and which free resources should I use?
Start with EY-Parthenon Australia's interview preparation page and its example investment case, answering each of its five questions before you read EY's suggested answer, then train each step your office names: a numerical test where one is used, case interviews and a fit interview. Practice investment and due diligence cases, because EY-Parthenon's teams work on strategy, transactions and corporate finance. On Road to Offer the sample case on this page runs in your browser with no account; a free account includes 1 full AI-graded case, such as Craft Beverage Acquisition, a buy-or-walk deal case; Velmont Capital and Quillfield Mechanical are worked acquisition cases with a model answer for every question and need no account. Firm-style cases are practice cases written for Road to Offer or adapted from university consulting club casebooks, not the firm's own cases.
Where can I practice EY-Parthenon-style case interviews for free?
EY-Parthenon Australia publishes one example case with suggested answers; none of the EY-Parthenon careers pages we checked has a case library. On Road to Offer, the sample case on this page is a commercial due diligence (a buyer tests a target's growth plan) that runs in your browser with no account: clarifying answers, a two-minute timer and what a strong structure covers. Craft Beverage Acquisition is the full deal case, run out loud with an AI interviewer or step by step; your first full case is free with a free account. Velmont Capital (a private equity buy decision) and Quillfield Mechanical (what a buyer should pay for a competitor) are free to read with a model answer for every question, no account. They are written in other firms' styles and picked because they end on a price or a go or no-go, like a due diligence case.
Does EY-Parthenon publish an example case, and how should I practice for its case interview?
Yes, one. EY-Parthenon Australia's Strategy careers page sets out an example case on a client's option to invest in a new electricity generation plant, in five questions with a suggested answer to each; the US, Dutch, French and German EY-Parthenon pages we read publish none. Answer each question on paper before you open EY's answer, out loud as if to an interviewer. Then practice cases that end in an investment call: test a growth plan against the market, do the math without a calculator, and say invest, wait or walk with the condition that would change your answer. The sample case on this page does that in your browser; Craft Beverage Acquisition is its full version with an AI interviewer, free with a free account.
Does EY-Parthenon have an online test or a written case?
Some offices test first. EY-Parthenon Netherlands starts with a numerical test, and Paris starts round one with a written quantitative test; the Australian, German and US pages name no test. None of these EY pages describes a written case or a group case. Candidates report both in some offices, and our EY-Parthenon case interview guide covers them. Road to Offer has no EY-Parthenon simulator; the EY assessment test guide and the case math drill train the numerical part.
Are EY-Parthenon case interviews candidate-led?
EY's pages do not use the term. EY-Parthenon Australia says the best candidates talk through their structure as they work, asking questions or offering observations along the way, and asks you not to recite a script or a pre-researched framework. EY-Parthenon France's recruitment brochure says it does not ask candidates to actually solve the case; it gauges how you approach the problem. Prepare to open your own structure and drive the analysis, and to follow cleanly if the interviewer sequences the questions, as Australia's five-question example does.
What behavioral questions does EY-Parthenon ask?
Expect motivation and experience questions next to the cases. EY-Parthenon Australia's fit interview covers your experience, why management consulting and your understanding of EY-Parthenon Strategy; Paris looks for candidates who are smart, nice and driven; EY US says it leans on behavioral questions that start with "Give an example of" or "Describe a situation when", and suggests preparing 10 to 15 stories you can adapt. Say each story out loud; Road to Offer's fit practice asks EY-Parthenon questions with follow-up probes, 1 session free with a free account.
What is a blind case interview at EY-Parthenon?
EY-Parthenon Australia calls its two first-round problem-solving interviews "blind": the interviewer knows nothing about you until you meet, so the case is judged on how you work it, not on your CV. The CV, transcript and cover letter come up in the separate traditional interview, usually the same day.
How many interview rounds does EY-Parthenon have?
It depends on the country. Australia says two or three rounds; the Netherlands has a first round (numerical test, recruiter interview, two case interviews) and a final round of three partner interviews; Paris has three rounds ending with an Equity Partner; Germany has a one-hour online interview, then an Assessment Day with three interviews. The US pages describe a mix of behavioral and case-based interviews without a number of rounds.
How soon does EY-Parthenon make an offer?
EY-Parthenon US says offer decisions are typically communicated within a week of your interviews. EY-Parthenon Germany makes an offer the same day if the Assessment Day goes well. The Australian, Dutch and French pages give no offer timing.
Why practice due diligence cases for EY-Parthenon?
Because deal work is a large part of what EY-Parthenon does. Its French Strategy team lists growth plans, strategic due diligence and value creation plans among its work, the Dutch page describes a leading M&A and private equity practice, and Australia says projects span private equity deals. EY does not say its interview cases come from deal work, but its one published example is an investment decision, so cases that test a plan and end in a price or a go or no-go are the closest practice.
Does EY-Parthenon give feedback after the interview?
EY-Parthenon Germany says you get personal feedback from your interviewer after the one-hour online interview, and internship candidates hear right after it whether they can join. The US, Australian, Dutch and French pages do not mention feedback.
