What is private equity?

Private equity is a way of owning companies privately, meaning not on the stock market, and trying to make them more valuable before selling them on. A private equity firm raises money from large investors (pension funds, endowments, insurance companies, wealthy families), pools that money into a fund, and uses it to buy companies. They usually pay part of the price in cash from the fund and borrow the rest, which the acquired company takes on as debt. Then they work on the business for four to seven years, ideally improving it, and sell it to a new buyer or take it public. The difference between the buy price and the sell price is the return.

That is the textbook answer. Here is what actually happens.

What private equity firms actually do all day

A private equity firm is structured like a production line. At one end, a small number of senior partners raise capital from pension funds, sovereign wealth funds, insurance companies, and the family offices of people whose names you would recognise. This is the fundraising function. It mostly involves roadshows, dinners, and meticulously-produced decks showing past returns. Fundraising is how the firm gets paid, because fees are charged on committed capital, so the bigger the fund, the more the firm earns whether or not the underlying deals work.

At the other end of the production line, the partners and deal teams spend their days sourcing, diligencing, negotiating, and eventually acquiring companies. The quality of a PE firm is really the quality of this deal flow. A firm that sees every decent deal in its sector before competitors do can afford to be picky. A firm that only sees the processes run by investment bankers is, in practice, competing on price.

In the middle sits the portfolio operations function, which has quietly become the most important part of a modern PE firm. This is where operating partners, sector experts, functional specialists (pricing, procurement, finance transformation, technology, talent) sit. They work with portfolio company management to try to actually improve the businesses. Twenty years ago this barely existed. Today it is how most large PE firms differentiate themselves in pitches, whether or not the operating teams actually move the numbers.

Underneath all of this is the investor relations function, which reports to the LPs, and the finance and compliance machinery that keeps the regulatory plumbing working. It is, for all the mystique, a business.

How private equity firms make money (and who really gets paid)

There are two pots. Management fees and carried interest.

Management fees are charged as a percentage of committed capital, typically 1.5% to 2.0% per year. If a firm raises a $5 billion fund, it will draw $75 to $100 million a year in fees, essentially as guaranteed revenue for roughly ten years. Management fees pay for offices in Midtown Manhattan, Mayfair, and Century City. They pay the base salaries of the 200 or so people working on the fund. They do not depend on the fund performing. A firm whose deals all go to zero still collects management fees for the life of the fund.

Carried interest (usually just called "carry") is the performance fee. Once the LPs have got their money back plus a hurdle rate (commonly 8% per year), the GP takes 20% of all additional profits. This is the bit that makes people rich. A $5 billion fund that returns $15 billion to LPs after fees has generated roughly $10 billion of gross profit and somewhere between $1.5 and $2 billion of carry, which gets distributed to a small number of partners. This is the economic engine of the whole industry.

There are also other fees that less defensibly end up in the GP's pocket. Management fees and monitoring fees charged to portfolio companies, transaction fees on acquisitions, dividend recap fees, refinancing fees. Most of these are partially rebated to LPs now, but historically they were a meaningful source of GP economics that LPs did not really notice. The best pe toolkit post on any of these will tell you how they actually work.

The lifecycle of a private equity deal

A typical deal runs on a four-to-seven-year cycle. It goes something like this.

Year one: the buy. The PE firm identifies a target, signs a letter of intent, runs confirmatory diligence, negotiates the debt package with lenders, and closes the deal. Usually a mix of equity from the fund and debt from banks and private credit lenders. The equity cheque might be 30% to 50% of the enterprise value. The debt is the rest.

Year one to two: the hundred-day plan. The PE firm installs a board, often replaces the CEO or CFO or both, and launches whatever value creation programme it has promised the investment committee. This usually includes quick cost takeouts, pricing actions, maybe a refinancing, and the first round of add-on acquisitions if the thesis is a roll-up.

Year two to five: the grind. The real operational work happens here, to the extent it happens at all. Margin expansion, organic growth initiatives, tuck-in acquisitions, sometimes an expansion into a new geography or product line. This is where the value is supposed to be created. In practice, a substantial share of deals end up generating most of their returns from multiple expansion (buying at 10x EBITDA and selling at 12x EBITDA) rather than operational improvement, a truth that the industry does not advertise.

Year four to seven: the exit. The PE firm starts running an exit process, usually through a competitive auction run by bankers. The buyer is often another PE firm (a "secondary" buyout), sometimes a strategic acquirer, occasionally the public markets via an IPO. Increasingly, the buyer is a continuation fund raised by the same PE firm, which moves the asset from one vehicle to another and resets the clock.

When the deal sells, the fund returns cash to LPs. If the fund is in the money, the GPs split 20% of the profit as carry.

The magic trick: leverage

If you understand one thing about private equity, understand this. PE returns are a leverage trick.

Buying a company with 50% equity and 50% debt, then selling it for a 50% higher price, turns into roughly a 100% return on the equity. The debt stays the same in absolute terms. All the upside flows to the equity holder. This is the core mathematics of an LBO. If you want the full walkthrough, see our LBO model explainer.

Add financial engineering on top. Pay yourself a dividend recap in year three, pulling cash out of the business by loading more debt on. Take a sale-leaseback on the real estate. Use PIK to avoid paying cash interest. By the time the deal exits, the return calculation is complicated enough that only the LPs' investment committee really follows it.

The counter to all this is that leverage cuts both ways. A deal that works goes brilliantly, because the equity is juiced. A deal that misses its numbers can wipe out the equity entirely, because the debt has to be serviced regardless of how the business is doing. This is how PE firms occasionally hand the keys to the lenders. Not often. But it happens, and it is happening more in 2025 and 2026 as interest rates stay higher than the industry assumed when it priced deals in 2021 and 2022.

The three tiers of private equity

The industry is big enough that it has divided itself into weight classes. Understanding the tiers helps you understand the news.

Mega funds. These are firms raising funds of $10 billion and up. Blackstone, KKR, Apollo, Carlyle, CVC, EQT, Advent, Bain Capital, TPG, Thoma Bravo, Vista. They chase deals at $1 billion of equity cheque and up, often much larger. They do public-to-private takeovers, large-cap buyouts, carve-outs from Fortune 500 companies. They are, essentially, asset managers at this point, with PE as one of several strategies alongside private credit, infrastructure, real estate, and secondaries.

Upper and middle market. Firms raising $2 to $10 billion funds, writing equity cheques of $100 million to $500 million. This is the largest bucket by fund count. Companies in this space typically have $50 to $250 million of EBITDA. Think Advent's middle-market fund, American Industrial Partners, Audax, Berkshire Partners, Genstar, Hellman & Friedman's smaller fund strategies, Harvest Partners, New Mountain, Oaktree's PE arm, Silver Lake's smaller deals.

Lower middle market. Firms raising $200 million to $2 billion funds, chasing companies with $10 to $50 million of EBITDA. This is where most of the actual buy-and-build activity happens, because smaller companies are cheaper to buy and easier to consolidate. The economics here are often as good or better than at the top end, just with less glamour.

There are also family offices, search funds, and private family-backed holding companies that increasingly look like PE firms, with the main difference being a longer time horizon and less pressure to exit. Some of the most interesting deals in 2025 and 2026 are happening here.

Who gives PE firms money, and why

LPs (limited partners) are the investors in PE funds. The biggest category is public pension funds. CalPERS, CalSTRS, New York State Common, Texas Teachers, the Canadian pension plans (CPP, Caisse, Ontario Teachers, BCI, OMERS, PSP, AIMCo). Between them they have roughly $3 trillion invested in private equity globally, because they need the returns to pay pensions and they cannot hit their return targets in public markets alone.

After that: sovereign wealth funds (GIC, ADIA, Mubadala, Temasek, NBIM, Qatar, Saudi's PIF). Then insurance companies, endowments, foundations, and family offices. Then the growing wave of retail money flowing in through interval funds and evergreen structures, which mega funds are building quickly because their traditional institutional base is maturing.

Why do they invest? Because, over the past 30 years, private equity has generated roughly a 3 to 5 percentage point return premium over public markets after fees. That premium has compressed over time as the industry has grown. The debate inside sophisticated LPs is whether the remaining premium justifies the illiquidity, the fees, and the concentration risk. The fact that LPs are still writing cheques suggests the answer is yes, for now.

What goes wrong (and why LPs keep writing cheques)

Plenty goes wrong.

Deals get priced too aggressively. GPs assume operational improvements that never materialise. The operating partners are, in many firms, a thin veneer over what is really a financial engineering business. Debt turns out to be harder to refinance than the model assumed. A recession hits and the management team that looked heroic in year one is struggling in year three. A roll-up integration produces the deal headcount but not the deal margin. A flagship deal goes to zero and quietly gets written off in year seven.

So why does the money keep flowing? Because the good firms genuinely are very good, and the bad firms have enough of a track record to keep raising next funds off the back of their best deals. Because LPs are locked in for ten years and need to keep putting new money to work to stay on their allocation targets. Because the industry produces enough breakout wins to make the losses worth it, statistically. Because very few corporate CEOs will ever generate the kind of wealth a lucky PE partner can, and that asymmetry keeps drawing talent in.

There is also a less flattering explanation, which is that the industry has become too big to fail politically. Mega-fund firms now own infrastructure, healthcare systems, software companies that run critical services. The LPs committed to them are the same public pension funds that politicians answer to. The incentives to keep the music playing are considerable.

Where it is going next

Three shifts are worth watching.

Continuation funds. When a PE firm can't find a buyer for a good asset at the price it wants, it increasingly sells the asset to a new fund it raises from LPs, sometimes the same LPs. This is the fastest-growing part of the industry and is essentially a way of buying more time. Useful mechanism, occasionally abused.

Private credit. The debt side of the business has exploded. Private credit firms now lend against deals that ten years ago would have been syndicated loans from banks. Many of the mega-fund PE firms are now primarily private credit businesses by assets. When people talk about "the next financial crisis starting in private credit," this is what they mean, though the connection between rhetoric and reality is thinner than the rhetoric suggests.

Retail and evergreen structures. The institutional LP base is maturing. The next $5 trillion of PE capital has to come from somewhere. It is coming from high net worth and retail investors via interval funds, BDCs, and new evergreen PE structures. Regulatory scrutiny of this shift is just beginning.

The reading list

If you want to understand the machinery in detail, these are the follow-on reads:

• What is a dividend recapitalisation? — how PE firms take cash out of portfolio companies without selling them.
• The LBO model, without the Excel porn — the mathematics of leverage, explained.
• What is PIK financing? — interest that doesn't get paid in cash.
• Sale-leaseback, explained — how PE firms pull cash out of portfolio company real estate.
• Private equity vs venture capital — the real differences, from the inside.
• Private equity compensation: the honest numbers — analyst to partner, base, bonus, and how carry really vests.

The closing take

Private equity is not quite the villain its critics paint it as and not quite the heroic value creator it paints itself as. It is a specific, powerful kind of ownership model that, when run well, can meaningfully improve a business. When run badly, it can strip a company for parts and leave it with too much debt. The industry is enormous, globally systemic, and poorly understood even by the people who work adjacent to it. The fact that you have read this far puts you ahead of most of them.

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