In a typical PE-style case, the interviewer stops caring about your TAM narrative the moment you fail to test whether the bid clears. The sheet is not grading "is the industry interesting." It is grading whether you can reverse-engineer the return the price implies, then stress the commercial story against that number. After this piece you should be able to open any verbal CDD or paper-LBO prompt the same way: returns first, market second, recommendation last.
That flip is what most consulting-trained candidates miss. They deliver a clean market-entry case and never ask what EBITDA and exit multiple the equity check actually needs.
Three formats, three scoring sheets
"PE case" is a loose label. Confirm the invitation. The products below share a spine but reward different closing moves.
| Format | Who usually runs it | What "good" looks like |
|---|---|---|
| Verbal commercial diligence | Funds, PE groups at consulting firms, boutique CDD shops | Market and customer evidence that either supports or kills a stated bid |
| Paper LBO / returns sketch | Fund associate screens | Sources-and-uses intuition, debt paydown, MOIC/IRR from given assumptions |
| Slide-shaped CDD | Bain PEG-style consulting diligence, strategy boutiques | Same commercial spine, tighter "so what for the IC memo," still returns-aware |
Bain describes its diligence work as commercial, operational, and technology assessment that should leave the sponsor with conviction and an initial value-creation plan, not a market essay in isolation (Bain private equity due diligence). McKinsey's public PE practice page frames diligence as commercial diligence plus value-creation levers such as pricing, procurement, and labor productivity, jointly led by a PE partner and an industry partner (McKinsey private equity). Neither page publishes interview rubrics. Treat those pages as product descriptions, not recruiter secrets.
The industry context matters only as motivation: as of Bain's 2025 Global Private Equity Report, global buyout deal value rebounded 37% year over year in 2024 to $602 billion (excluding add-ons), while exit value rose 34% to $468 billion (Bain Global PE Report 2025 outlook). Sponsors are still under pressure to put capital to work and to create value after close. Interviewers are listening for candidates who sound like they have sat through that tension, not like they are pitching a consulting project.
The returns-first flip
Do this in the first two minutes, out loud:
- Restate entry EBITDA and entry multiple (or EV) from the prompt.
- State the hold period and the return hurdle the interviewer gave you, or ask for one. If they shrug, use a working assumption and label it: "I'll use a 20% IRR target for the paper case."
- Back into the exit equity value that hurdle implies. Convert to the EBITDA and exit multiple combination that would get you there under a simple capital structure.
- Only then open the commercial tree: market, customers, competition, unit economics, value-creation levers that could produce that path.
Ned's rule. If you cannot name the exit EBITDA (or exit multiple) the bid needs before minute five, you are still doing a market-entry case. I score that as incomplete even when the structure is pretty.
A rough MOIC-to-IRR cheat sheet for five-year holds (compound annual, rounded; label it as a interview sketch, not a fund model):
| 5-year MOIC | Approx. IRR |
|---|---|
| 1.5x | ~8% |
| 2.0x | ~15% |
| 2.5x | ~20% |
| 3.0x | ~25% |
You do not need a full three-statement LBO for most verbal cases. You need enough arithmetic to show the CIM's "initiatives" do not magically clear 20% IRR at a rich entry multiple. For deeper valuation mechanics, Koller, Goedhart, and Wessels' Valuation remains the standard reference; do not recite chapters in the room.
What the interviewer is listening for
I score PE-style cases on a short mental checklist. Steal it.
| Signal | Pass | Fail |
|---|---|---|
| Bid awareness | Names entry EV or multiple early | Talks markets for ten minutes with no price |
| Returns bridge | Shows what EBITDA/multiple/debt path is required | Says "attractive returns" with no math |
| Customer risk | Concentration, switching, procurement named | Uses NPS as proof of lock-in |
| Value creation timing | Splits year-1 vs year-5; separates pricing from M&A | Front-loads every initiative into year 1 |
| Recommendation quality | Bid lower, pass, or pursue with conditions | Binary "invest" as if you sit on IC |
The folklore on Glassdoor and Reddit is that PE interviews are "just LBOs." Sometimes they are. Often the verbal CDD is the real filter, and the paper LBO is a hygiene screen. Say what you can verify from the invitation; do not invent a process.
Worked example: Northline Climate (regional HVAC platform)
Prompt. A mid-market sponsor is looking at Northline Climate, a regional commercial HVAC installer and service platform across four Southeastern metros. CIM: $28m EBITDA, 12.0x entry, five-year hold, sponsor wants mid-20s IRR. Management claims $8m of EBITDA upside from "pricing discipline," branch consolidation, and two tuck-in acquisitions. You have 25 minutes. Would you support pursuing at 12.0x?
Clarify. You are commercial diligence support, not the investment committee. Success is whether the commercial story can support the return math, and what would break it. A lower bid is a valid answer.
Step 1 — returns before color. Entry EV = 12.0 x $28m = $336m. For the paper case, assume 50% equity / 50% net debt at close: equity check $168m, net debt $168m. (Say aloud that real structures vary; you are not inventing a lending market.)
A mid-20s IRR over five years needs roughly 3.0x MOIC. On $168m equity that is about $504m of exit equity value. If net debt is unchanged (stress case, no paydown), exit EV must be about $672m. At an unchanged 12.0x exit multiple, that demands ~$56m of exit EBITDA — an +$28m bridge, not the CIM's +$8m.
Even if you allow modest debt paydown of $40m over the hold (optimistic for a services business with working-capital drag), exit equity of $504m still needs exit EV of about $632m, or ~$53m EBITDA at 12.0x. The CIM stack is still short by roughly $17–25m of EBITDA unless you also get multiple expansion.
Step 2 — commercial so-what. Now the tree earns its keep:
- Market. Replacement and repair demand tracks commercial real-estate activity and extreme-weather seasons more than GDP TED talks. Ask whether Northline's backlog is maintenance contracts or one-off installs.
- Customers. Suppose the top 15 accounts are 42% of gross profit (invented for the case). Missing an emergency call loses the account; switching costs are operational, not contractual.
- Labor. Tech scarcity is the real capacity constraint. Branch consolidation that "saves $2m" can destroy response times and churn the book.
- Add-ons. Two tuck-ins at $4m EBITDA each are not in the bag. Diligence has to price integration risk and multiple paid on those deals.
- Pricing. Eighty basis points of price realization on $220m revenue is about $1.8m — real, but nowhere near a $28m bridge.
Recommendation. I would not support 12.0x on the CIM as written. Either CDD finds a credible path to the low-$50m EBITDA range without heroic M&A, or the bid walks toward a high-9 / low-10 handle where the required bridge shrinks. Next diligence steps: customer calls on churn after missed SLAs, a technician-retention deep dive, and a handshake with the QoE accountant on what "pricing discipline" already shows up in trailing margins. You do not pretend to be quality of earnings.
That is the whole point of the case. The market can be "attractive" and the bid still wrong.
Where consulting CDD and fund seats diverge
| Seat | Case emphasis | What to practice |
|---|---|---|
| Consulting CDD (e.g. Bain PEG-style work) | Outside-in market, customer, competitor; memo for a sponsor | Issue trees that close with bid implications |
| Fund associate | More accounting and paper LBO hygiene | MOIC/IRR sketches you can defend without Excel theater |
| Operating / value-creation roles | Post-close levers, 100-day plans | Sequencing year-1 cash vs year-5 equity story |
Bain publicly claims more than 22,000 diligence cases since 2000 and involvement in more than half of scale buyout transactions in that span (Bain due diligence). That is marketing for a practice, not a hiring scorecard — but it explains why consulting PE interviews still sound like diligence memos. Fund interviews add more balance-sheet fluency. Read the invite; do not deliver a PE 101 lecture unless they ask.
Compensation folklore is loud and often wrong. Confirm numbers with recruiting. As of HBS Class of 2025 employment data, private equity remained a major MBA destination alongside consulting and technology; use the school's published tables for any pay comparison rather than screenshots circulating online (HBS Class of 2025 employment report, HBS employment data).
How candidates leak points
They maximize TAM. They never name the entry multiple. They put every value-creation idea in year 1. They treat customer concentration as a footnote. They give a binary "invest." They spend five minutes explaining what private equity is. They confuse NPS with switching costs. They invent debt markets they cannot defend.
Funds and CDD shops hire people who can say: the return does not clear unless X, and X is not in the CIM.
Run this drill today
Take any case you already know — or open a fresh one on CoachNed — and force a returns close before you build the market tree. Use the Northline arithmetic as a template: entry EV, equity check, required MOIC, required exit EBITDA, then commercial stress.
For a timed live rep with a debrief, use the voice interview (UrbanBrew, about 18 minutes). For a five-minute typed first pass with instant scores, use /start. Broader case volume lives at /cases; pair structure with /drills/math so the returns sketch stays fast. Everything is open for seven days, no card; then $120 for a recruiting season or $49 a month.
CoachNed is independent and not affiliated with McKinsey, BCG, Bain, Deloitte, or any private equity firm named for interview-style practice.
Frequently asked questions
What is a private equity case interview testing?
Whether you can connect commercial diligence to a bid and a return path. Attractive markets without a returns bridge usually fail the case.
Do I need a full LBO model in Excel?
For many verbal CDD cases, no. For some fund associate processes, yes. Do not bluff a model you cannot defend under follow-ups.
How is consulting CDD different from a fund associate interview?
Consulting CDD is usually a memo for a sponsor: market, customer, competitor, then implications for the bid. Fund seats add more accounting and paper-LBO hygiene. Confirm the format in the invitation.
What return hurdles should I assume if none are given?
Ask first. If the interviewer wants you to proceed, state a working assumption (for example, ~20% IRR / ~2.5x MOIC over five years) and keep it labeled as an assumption, not a firm policy.
Are PE case interviews the same across mega-funds and middle-market firms?
No. Mega-funds and middle-market shops differ on deal size, leverage norms, and how much operating detail they want. Process details are not standardized publicly; treat candidate folklore as folklore.
Sources
- Bain Private Equity Due Diligence — commercial / operational / technology diligence framing; 22,000+ diligence cases claim. Checked 2026-09-24.
- Bain Global Private Equity Report 2025 outlook — 2024 buyout deal value ($602bn, +37%) and exit value ($468bn, +34%). Checked 2026-09-24.
- McKinsey Private Equity — commercial and value-creation diligence description. Checked 2026-09-24.
- HBS Class of 2025 Employment Report — MBA placement context including private equity. Checked 2026-09-24.
- HBS Employment Data — published Class of 2025 compensation and industry tables. Checked 2026-09-24.
- Koller, Goedhart, and Wessels, Valuation: Measuring and Managing the Value of Companies — standard reference for valuation mechanics (book). Checked 2026-09-24.