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The private equity case study interview, and how funds differ

How private equity case studies and modelling tests work at Blackstone, KKR, CVC and EQT: formats, what the investment memo needs, and common mistakes. 8 min readUpdated By the Prepper team

Private equity interviews add something banking interviews do not have: you are asked whether you would invest. The case study is where that judgement is tested, and it usually decides the offer.

The formats you will meet

  • Paper LBO. Ten to fifteen minutes with pen and paper. Simple numbers, no calculator. Tests whether you know the mechanics cold.
  • Timed Excel model. One to three hours from a short brief or a blank sheet. Tests speed, structure and error-checking.
  • Take-home case. A confidential information memorandum, a few days, and a short investment memo or slides at the end, followed by a discussion.

How funds tend to differ

  • Blackstone combines a modelling test (a paper LBO or a two to three hour Excel case) with a deal discussion and fit. Candidates report that investment judgement counts for more than raw speed.
  • KKR uses a case study and an LBO model, and spends real time on the deals on your CV: why each was a good or bad investment.
  • CVC processes in Europe often use a memorandum-based case plus a model, with sector questions on top.
  • EQT asks about values and its thematic approach to investing alongside a modelling case.

What a good answer contains

  1. A clear recommendation in the first sentence: invest, pass, or invest at a lower price.
  2. Three or four reasons, each tied to a number: market growth, margin trend, cash conversion, entry multiple against peers.
  3. The return. Base case IRR and money multiple, and what drives it: growth, margin, deleveraging or multiple expansion.
  4. The risks that matter and how you would test them in due diligence.
  5. A price. The highest multiple at which the deal still meets the fund's return target.

Mistakes that cost offers

  • Building a perfect model and running out of time for the recommendation.
  • Listing every risk instead of ranking the two that could break the deal.
  • Assuming multiple expansion to make the return work.
  • Not checking that the balance sheet balances and cash never goes negative.

Practise the mechanics first with a paper LBO, then time yourself on full models in model prep.

Frequently asked questions

How long is a private equity modelling test?

Anything from a 10-minute paper LBO to a three-hour Excel build. Take-home cases can run over several days.

Do I need to recommend investing?

No. A well-argued pass, or an offer at a lower price, is a strong answer. What matters is that the recommendation follows from your numbers.

What return do private equity funds look for?

Large buyout funds commonly target around 20% IRR and roughly 2 to 2.5 times their money over a five-year hold, though targets vary by fund and strategy.

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