In this article
Start here: the learning path
Study the technical material in the order below, because each topic uses the one before. The fit story runs alongside, not after.
- Private equity
- Private equity is the business of raising money from investors into a private fund, using it to buy stakes in companies that are not traded on a public exchange (or to buy listed companies and take them private), improving them, and selling them later. The U.S. Securities and Exchange Commission (SEC) describes a private equity fund as a private fund managed by a private equity firm, with strategies such as buyout, growth equity and venture capital.
- Leveraged buyout
- A leveraged buyout (LBO) is the purchase of a company using mostly borrowed money and a small amount of the buyer's own equity, with the company's own cash flow used to repay the debt. The investor's return comes from the growth in the company's value and the debt paid off.
- Carried interest
- Carried interest is the share of a fund's profits, commonly twenty percent, that goes to the fund's manager as a performance fee once investors have received their capital back and an agreed minimum return, in the common whole-of-fund model. It is paid on top of the yearly management fee.
- Multiple of invested capital
- The multiple of invested capital (MOIC) is the total value returned to an investor divided by the amount the investor put in. A MOIC of 2.0 means the investor got back twice the money invested, whatever the time taken.
- Internal rate of return
- The internal rate of return (IRR) is the yearly compound rate at which an investment grows, found as the discount rate that makes the present value of all its cash flows zero. For a single investment and a single payout it equals the MOIC raised to the power of one over the years, minus one.
Text description of the diagram
- The path has four technical steps and a fit step that runs alongside them.
- The paper LBO comes after the full LBO model because it is the same arithmetic done by hand.
- Returns arithmetic means the multiple of invested capital and the internal rate of return.
- Fund economics. Fees, carried interest and the order in which cash is paid out.
- The LBO model. Sources and uses of funds, debt paydown and the exit.
- The paper LBO. The same model with round numbers and no spreadsheet.
- Returns arithmetic. MOIC, IRR and what moves them.
- Why private equity. Your reasons, and why not another investing job such as a hedge fund.
Behind the finance, the investment banking interview guide covers the accounting, three-statement and valuation base that every LBO question assumes.
What private equity interviews test
Private equity interviews test finance mechanics, mental arithmetic and judgement in one conversation. The mechanics are fund economics and the LBO. The arithmetic is returns under time pressure; expect a paper LBO, though practice differs by firm. The judgement is whether you can say what makes a business a good buyout candidate and why you want this job.
The SEC glossary describes a private equity fund as managed by a private equity firm and notes that a typical approach is to take a controlling interest in a company and actively manage it to raise its value (SEC glossary, read October 2026). That one sentence explains the question mix: control means the buyer sets the debt, the plan and the exit, so interviewers ask you to model those choices. Modelling practice questions are in the financial modeling interview questions page, and the broader technical drill is in the investment banking technical questions page.
Knowing it is half the job. Saying it is the other half.
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Start Free Trial →How does a private equity fund make money?
A private equity firm earns a yearly management fee and a share of profit called carried interest. The SEC glossary says a manager typically charges a yearly fee based on committed or invested capital, plus a performance fee on profits, often called carried interest, and calls the combined arrangement "2 and 20" shorthand (SEC glossary, read October 2026). On a fund with 1,000 units committed, a 2% fee on committed capital is 20 units a year, or 100 over five investment years.1
How does the distribution waterfall work?
A waterfall is the rule that fixes the order in which a fund's cash is paid out. The Institutional Limited Partners Association (ILPA) says a standard model that returns all contributions plus the preferred return first, called whole of fund, is best practice, and that carry should be calculated on net profits (Principles 3.0, June 2019). The preferred return is the minimum yearly return, often called a hurdle, that investors must receive before the manager earns carry.
Take an illustrative fund: 1,000 contributed, 1,800 distributed after five years, an 8% preferred return and 20% carry with a full catch-up. Investors first get 1,000 of capital back, then 469.33 of preferred return. The manager then takes a catch-up of 117.33, enough to reach 20% of profit so far, and the last 213.33 splits 80/20, giving investors 170.67 and the manager 42.67. The manager receives 160.0, exactly 20% of the 800 profit.1
| Tier | Investors | Manager |
|---|---|---|
| Capital returned | 1,000 | 0 |
| Preferred return at 8% for five years | 469.33 | 0 |
| Catch-up | 0 | 117.33 |
| 80/20 split of the rest | 170.67 | 42.67 |
| Total | 1,640.00 | 160.00 |
Text description of the diagram
- Investors receive 1,000 of capital and 469.33 of preferred return before the manager is paid.
- The manager receives 160.0, exactly 20% of the 800 profit.
The ILPA text also favours a hard hurdle, where carry applies only to profit above the preferred return, which would remove the catch-up in the example. Say which version you assume, because both exist in practice. Some funds also pay carry deal by deal instead of on the whole fund; the same ILPA text names that as a separate model and calls whole of fund best practice.
What is an LBO and how do you walk through one?
An LBO is a takeover paid for mostly with debt, and the walk-through follows the cash. Kaplan and Stromberg's abstract describes a leveraged buyout as a specialised investment firm acquiring a company with a relatively small portion of equity and a relatively large portion of outside debt (Kaplan and Stromberg, 2009). The steps are: set the purchase price, split it into debt and equity, forecast earnings and the cash that repays debt, assume an exit, and compute the return.
An illustrative case: a business with earnings before interest, taxes, depreciation and amortisation (EBITDA) of 100 is bought at 8 times its EBITDA, an enterprise value (the value of the operations to lenders and shareholders together: equity value plus net debt) of 800. Debt is 5 times earnings, 500, so equity is 300, or 37.5% of the price. EBITDA grows 5% a year for five years to 127.63, the business sells at the same 8 times for 1,021.03, and 35 a year of free cash flow (cash left after interest, tax and investment, held flat here for simplicity) repays debt down to 325. Equity at exit is 696.03, a MOIC of 2.32 and an IRR of 18.3%.1
Where does the return come from?
The equity gain of 396.03 splits into earnings growth, debt paydown and a change in the multiple. Earnings growth adds the extra 27.63 of EBITDA times the 8 times multiple, or 221.03. Debt paydown adds 175.0, five years of 35. The exit multiple equals the entry multiple, so the change adds 0, and the three parts sum to the full gain.1
When a question asks about debt, compare the two structures: without debt the same deal needs 800 of equity and the owner keeps the 35 a year as cash, so the same 396.03 gain is 1.50 times and 8.4% a year; with 300 of equity it is 2.32 times and 18.3%.1 Counting the interest an all-equity owner would save narrows this gap but does not close it. Borrowing works both ways: with no growth, a 6 times exit and no spare cash to repay debt, the levered equity returns 0.33 times against 0.75 times without debt.1
Text description of the diagram
- Earnings growth adds 221.03 and debt paydown adds 175.0 to the equity value.
- The exit multiple equals the entry multiple, so a multiple change adds nothing.
How do you do a paper LBO without a spreadsheet?
A paper LBO is the same model with round numbers, done in your head or on paper in a few minutes. Round entry earnings, the multiple and the debt, then grow earnings, subtract debt repaid, and divide exit equity by entry equity. Convert the multiple to a yearly rate with known anchors: 2.0 times in five years is about 14.9% a year, 2.5 times about 20.1% and 3.0 times about 24.6%.1 Sensitivity is the next question: moving the exit multiple to 7 times cut the return to 1.895 times and 13.6%, and 9 times lifted it to 2.746 times and 22.4%.1 Say the assumption out loud before each step.
The topics in this path
Two question types come up often in private equity interviews, and each has a standard way to answer it.
Paper LBO questions, worked
A paper LBO question gives a few numbers and asks for the investor's return without a spreadsheet. The standard answer lays out sources and uses of funds first, because that table shows how the purchase is financed, then forecasts one line of cash flow, then computes exit equity and the multiple. The trap is jumping to the return before the debt and equity split is on the page. Expect the interviewer to change one input midway, such as a lower exit multiple, to see whether you can update the answer calmly and say what moved. Practise by writing three such questions out with the arithmetic line by line, and note the sensitivity each one invites.
Why private equity and why not a hedge fund
Why private equity is a fit question, and the honest answer names what you like about the work. A buyout fund typically buys whole companies, holds them for years and earns money by improving and selling them, while a hedge fund typically trades securities over shorter horizons. A good answer ties your reasons to that difference: the long cycle, the operating involvement, or the structured deal work. The trap is a generic answer about money and prestige. It comes as why private equity, why this firm, and why not banking or a hedge fund; answer each in about a minute, and expect the follow-up that tests whether you know the firm's actual strategy.
Questions interviewers ask on private equity
Questions fall into four families: fund economics, the LBO, returns, and fit. These come up across the four families, each with a one-line answer in our own words.
Fund economics
- How does a private equity firm make money? It earns a yearly management fee and a share of profit called carried interest.
- What is a preferred return? The minimum return investors receive before the manager earns carry, such as 8% a year in the example.
- What is a catch-up? A tier that pays the manager until its carry equals the agreed share of total profit, 20% in the example.
The LBO
- Walk me through an LBO. Set the price, split debt and equity, forecast cash flow, repay debt, assume an exit, and compute the return.
- What makes a good LBO candidate? Steady cash flow to service debt, a sensible entry price and a credible way to grow earnings or cut costs.
- Why does borrowing raise returns? The same gain is spread over a smaller equity cheque: 2.32 times with debt against 1.50 times without in the example, and losses are magnified the same way.
Returns
- What is the difference between MOIC and IRR? MOIC ignores time; IRR is the yearly rate, so the same 2.0 times is 14.9% over five years and 18.9% over four.1
- What drives returns in an LBO? Earnings growth, debt paydown and multiple change, which summed to the full gain in the example.
- Do a paper LBO. Round the numbers, lay out sources and uses, grow earnings, repay debt, and convert the multiple to a rate.
Fit
- Why private equity? Name what you like about owning and improving companies, and tie it to this firm.
- Why not investment banking or a hedge fund? Contrast the work: advising on deals, trading securities, or owning and running companies.
- Walk me through your resume. Tell the short story that ends at why you are in this room; the linked page below builds a one-minute version.
Prepare the story with the tell me about yourself page and the behavioural interview guide. The merger and acquisition questions page covers deal mechanics, the interview loops guide shows how rounds are staged, and the questions to ask the interviewer page covers the end of the round. When an offer arrives, see salary negotiation.
Follow-up questions
How do I answer private equity interview questions?
Answer in three steps: the one-line answer, the mechanism with a small number, and the caveat. For an LBO, say the assumption first, then the arithmetic, then the sensitivity.
How do I prepare for a private equity interview?
Learn the fund economics, build one LBO by hand until the arithmetic is automatic, rehearse a paper LBO with round numbers, and prepare your reasons for private equity and your own story. The financial modeling interview questions page has modelling practice.
What questions should I ask in a private equity interview?
The questions to ask the interviewer page covers the end of the round. Ask how the firm sources deals, what the typical hold period and debt level are, and how the team decides between buying, improving and selling. Avoid questions the firm's website answers.
What is the difference between multiple of invested capital and IRR?
The multiple of invested capital ignores time and the internal rate of return annualises it. A 2.0 times result is 14.9% a year over five years and 18.9% over four.1
Why does borrowing raise the return in an LBO?
Debt shrinks the equity cheque, so the same gain is a bigger multiple of it: in the example 396 of gain is 2.32 times on 300 of equity but 1.50 times on 800. If the business loses value, the borrowing magnifies the loss.1
- A private equity firm earns a management fee plus carried interest, paid through a waterfall that returns capital and a preferred return first.
- An LBO return comes from earnings growth, debt paydown and multiple change, and borrowing magnifies it without creating it.
- Say the assumption, then the arithmetic, then the sensitivity, on every paper LBO.
- MOIC ignores time and IRR does not, so state the holding period.
- Prepare the fit story alongside the technical drill.
Sources
- Glossary: private equity fund, general partner, limited partner, management fees, performance fees — U.S. Securities and Exchange Commission (page shows Feb. 2, 2024; read 2026-10-24), 2 Feb 2024
- Leveraged Buyouts and Private Equity, Journal of Economic Perspectives 23(1), 121-146 — American Economic Association (Kaplan and Stromberg, Winter 2009), 1 Jan 2009
- ILPA Principles 3.0: Fostering Transparency, Governance and Alignment (GP and fund economics) — Institutional Limited Partners Association (file dated 25 June 2019; read 2026-10-24), 25 Jun 2019