PE-Style Questions in IB Interviews: What They Ask and How to Answer

You prepped your accounting questions, your DCF walkthrough, and your "why banking" story. Then the interviewer leans back and says, "Okay, quick one. You buy a company for 10x EBITDA, use 60% debt, and exit in five years. What's your return?"

Welcome to PE-style questions, which show up in investment banking interviews more often than most candidates expect. The good news is that they follow a small set of predictable patterns. Once you know those patterns and can do the math in your head, these questions become a chance to stand out.

This post covers the main types of PE questions, a fully worked paper LBO, the mental math shortcuts you need, and the traps interviewers like to set.

Why Banks Ask PE Questions in the First Place

It can feel strange to get grilled on private equity when you're interviewing for a banking seat. There are good reasons for it, though.

• Sponsors are huge clients. Private equity firms buy companies, sell companies, and refinance companies constantly. Bankers on M&A, leveraged finance, and coverage teams work with them all the time.
• LBO thinking shows up in valuation. When a bank pitches a sale process, it often runs an LBO analysis to estimate what a financial buyer could afford to pay.
• It tests real understanding. Anyone can memorize "walk me through a DCF." LBO questions force you to connect leverage, cash flow, and returns on the spot.
• Interviewers know where analysts go next. Many bankers eventually recruit for PE, so they like seeing that you understand the buy side.

You won't usually be expected to build a full model in a first-round interview. You will be expected to explain the logic clearly and handle simple numbers without freezing.

The 6 Types of PE Questions You'll Actually See

Most PE-style questions fall into one of these buckets.

1. "Walk me through an LBO"

This is the classic. Keep your answer structured and under a minute. Here's a version you can adapt:

"A private equity firm buys a company using a mix of its own equity and a significant amount of debt. First, you set the purchase price, usually as a multiple of EBITDA, and decide how much debt and equity fund it. Then you project the company's cash flows over a holding period, often around five years, and use the free cash flow to pay down debt. At the end, you assume an exit, again usually at a multiple of EBITDA, subtract the remaining net debt to get the equity value, and compare that to the equity you put in to calculate your returns, typically IRR and the multiple of money."

Notice the flow: entry, financing, operations and debt paydown, exit, returns. If you hit those five steps in order, you've nailed it.

2. "Why use leverage in an LBO?"

The short answer: debt lets the sponsor put in less equity, so any increase in the company's value is spread across a smaller equity check. That magnifies returns.

Two supporting points worth mentioning:

• Interest on debt is generally tax-deductible, which creates a tax shield.
• Debt costs less than equity, so replacing some equity with debt can lower the overall cost of capital.

Then show balance by adding the flip side: leverage also magnifies losses and increases the risk of default if the business underperforms. Interviewers love hearing that you see both sides.

3. "What makes a good LBO candidate?"

You want a company that can comfortably carry a lot of debt and has paths to grow its value. Hit a few of these:

• Stable, predictable cash flows to cover interest and repay debt
• Low capital expenditure needs, so more cash is left over
• Strong market position or recurring revenue
• Room to improve operations, like cutting costs or expanding margins
• Assets that can serve as collateral for lenders
• A reasonable purchase price
• A believable exit path, such as a sale to a strategic buyer, a sale to another sponsor, or an IPO

A good follow-up: "So would a fast-growing, cash-burning biotech be a good LBO candidate?" No. Unpredictable cash flows and heavy spending make it a poor fit for heavy debt.

4. "How do PE firms create value?"

There are three main levers. Memorize them, because they're the backbone of every LBO conversation:

1. EBITDA growth through revenue growth or margin expansion
2. Debt paydown using the company's free cash flow, which shifts value from lenders to equity holders
3. Multiple expansion, meaning you exit at a higher EBITDA multiple than you paid

Strong candidates add that multiple expansion is the least reliable lever, since it depends heavily on market conditions. Sponsors usually prefer to underwrite deals assuming they exit at the same multiple they paid.

5. "Would a strategic buyer or a PE firm pay more?"

Usually, a strategic buyer can pay more. A strategic (a company in the same or a related industry) can often realize synergies, like cutting overlapping costs or cross-selling products, which justifies a higher price.

A PE firm is constrained by its target returns. If paying more would push its expected IRR below its hurdle, it walks away. A common rule of thumb is that sponsors target IRRs somewhere in the 20% to 25% range, though this varies by firm, strategy, and market environment.

The nuance to add: a sponsor can outbid a strategic, especially if it already owns a similar business and can create synergies through an add-on acquisition, or when credit markets let it use more cheap debt.

6. The paper LBO

This is the one that rattles people. The interviewer gives you a few numbers and asks you to calculate returns in your head or on scratch paper. Let's do one together.

A Worked Paper LBO, Step by Step

Here's the setup:

• Company EBITDA today: $100 million
• Purchase multiple: 10x EBITDA
• Financing: 60% debt, 40% equity
• Holding period: 5 years
• EBITDA in year 5: $150 million
• Cumulative free cash flow used to repay debt: $300 million
• Exit multiple: 10x EBITDA
• Ignore fees and assume no cash on the balance sheet

Step 1: Entry

Purchase price = 10 × $100m = $1,000m enterprise value

• Debt = 60% × $1,000m = $600m
• Equity = 40% × $1,000m = $400m

Step 2: Exit

Exit enterprise value = 10 × $150m = $1,500m

Remaining debt = $600m − $300m paid down = $300m

Exit equity value = $1,500m − $300m = $1,200m

Step 3: Returns

MOIC (multiple of invested capital) = $1,200m ÷ $400m = 3.0x

A 3.0x return over 5 years works out to an IRR of roughly 25%. (More on how to get that quickly in a second.)

Step 4: Bonus points, the value creation bridge

The equity grew from $400m to $1,200m, an $800m gain. Where did it come from?

• EBITDA growth: $50m extra EBITDA × 10x = $500m
• Debt paydown: $300m
• Multiple expansion: entry and exit at 10x, so $0

$500m + $300m + $0 = $800m. It ties out perfectly.

If you volunteer this breakdown without being asked, you're showing the interviewer you understand why the return happened, not just how to divide two numbers.

Step 5: See what leverage did

Now imagine the same deal with no debt at all. You'd write a $1,000m equity check. You'd exit at $1,500m of enterprise value, and you'd keep the free cash flow as cash. With no interest to pay, that cash pile would also be bigger than $300m.

Even giving the all-equity deal generous credit for that extra cash, you land at roughly 2x, not 3x. Same business, same performance, much lower return. That's leverage at work.

Mental Math Shortcuts for IRR

Nobody expects you to compute an exact IRR in your head. They do expect you to estimate quickly. Memorize this table:

A few tricks to go with it:

• Rule of 72: divide 72 by the annual return to estimate how many years it takes to double. At 15%, money doubles in about 4.8 years, which is why 2x in 5 years is roughly 15%.
• Doubling chains: 4x is two doublings. If you double every 2.5 years, you hit 4x in 5 years, which implies an IRR around 32%.
• Sanity check direction: the longer it takes to reach the same multiple, the lower the IRR. Always.

The Trap Questions Interviewers Love

These are designed to see whether you truly understand returns or just memorized formulas.

"If you hold the investment longer at the same MOIC, what happens to IRR?"

IRR goes down. The same multiple spread over more years means a lower annual return. 2x in 3 years is about 26%. 2x in 5 years is about 15%.

"What does a dividend recap do to returns?"

In a dividend recap, the company takes on new debt and pays the proceeds out to the sponsor as a dividend. Because the sponsor gets cash back earlier, IRR usually goes up.

MOIC is less clear-cut. It might stay roughly the same or even dip slightly, since the extra debt adds interest costs that reduce the equity value at exit. Saying "IRR typically rises, the effect on MOIC is more muted" shows real understanding.

"Would you rather have a higher IRR or a higher MOIC?"

There's no single right answer, and that's the point. A high IRR on a quick flip might return less total cash than a slightly lower IRR held longer. Many investors care about both: IRR measures speed, MOIC measures how much money you actually made. Mention that a fund that can't easily redeploy capital might prefer the bigger MOIC.

"What happens to returns if the purchase price goes up?"

Returns fall, assuming everything else stays the same. You either put in more equity for the same exit, or you add more debt and carry more risk and interest. Either way, the sponsor is paying more for the same future cash flows.

How to Practice So These Questions Feel Easy

• Do five paper LBOs out loud this week. Change one variable each time (leverage, exit multiple, growth) and watch how returns move.
• Always state your assumptions. "I'll ignore fees and assume no cash on the balance sheet" makes you sound organized and protects you from silly mistakes.
• Round aggressively. Interviewers care about logic, not decimals. "About 25%" is a great answer.
• Practice the value creation bridge. It's the easiest way to sound like you've done this before.
• Read a few real buyout announcements. Ask yourself why a sponsor might like that business. It gives you material for "pitch me a deal" questions.

The Bottom Line

PE-style questions in IB interviews boil down to one core idea: a sponsor buys a business with a lot of debt, grows it, pays down that debt, and sells it for more. Every question, from "walk me through an LBO" to the dividend recap trap, is a variation on that story.

Know the three value creation levers, memorize the IRR table, and run a handful of paper LBOs until the math feels automatic. When that "quick one" comes up in your interview, you'll be the candidate who smiles instead of panics.