How a Private Equity Fund Is Actually Structured: The Limited Partnership, the Ten-Year Life, the Investment Period, and the LPA Terms That Govern the Money Long Before Any Carry Is Paid
Michael King, PE Investment Manager · 10 min read ·
- A private equity fund is a limited partnership, not a company. The investors — pensions, endowments, insurers, sovereign wealth funds — are the limited partners (LPs), passive and liable only up to what they commit. The firm runs the fund through a general partner (GP) entity that has unlimited liability and total control over investment decisions. The whole structure exists to keep the LPs passive and liability-capped while handing the GP the keys, and to pass profits straight through to investors without a layer of tax at the fund itself.
- A fund holds commitments, not cash. When an LP “invests” £50m it signs a legal promise to fund up to that amount when asked; the money sits on the LP’s own balance sheet until the GP issues a capital call (a drawdown) to fund a specific deal or fee. The GP draws the money down over the investment period, roughly the first five years, which is why a fund’s early cash flows are negative and its reported IRR starts underwater — the J-curve.
- The fund runs on a ten-year clock, commonly extendable by two further one-year periods. The first five years are the investment period, when the GP can make new platform investments; the back five are the harvest period, when it manages and exits what it already owns. Almost no new platforms are bought after year five without LP consent, and the ten-year deadline is the pressure that forces exits — the reason a fund late in its life is a seller whether or not the market is a good one to sell into.
- The economics and the control both live in the limited partnership agreement (LPA). It sets the management fee (a median 2% of committed capital in the investment period, with buyout averages compressing toward ~1.6%) and the carry, but the terms that decide who controls the money are the governance ones: the GP commitment (a median of roughly 2.5% of the fund, the manager’s own skin in the game), the key-person clause, for-cause and no-fault removal (the latter typically a 75% supermajority of LPs), and the LP advisory committee. Reading a fund by its fee and carry alone misses the half of the LPA that actually matters when a deal or a manager goes wrong.
A Fund Is a Limited Partnership, Not a Company
The first thing to get right about a private equity fund is what it legally is: a limited partnership, a centuries-old structure repurposed to pool institutional money. It is not a company with shareholders and it is not a bank account. It has two classes of participant. The limited partners — the investors, overwhelmingly institutions such as pension funds, insurers, endowments and sovereign wealth funds — put up almost all the money and stay passive; their liability is capped at what they commit, and in exchange for that protection they give up any say in the individual investment decisions. The general partner is the entity through which the firm runs the fund: it makes every buy and sell decision, and it carries unlimited liability for the partnership’s obligations.
That split is the whole point of the structure, and it is worth understanding why the partnership form is used rather than a corporate one. A limited partnership is tax-transparent — it is not taxed at the fund level. Gains and income pass straight through to the LPs, who are taxed (or not) in their own hands according to their own status, so a tax-exempt pension fund keeps its exemption and no one pays a layer of corporate tax at the fund. Pair that pass-through treatment with limited liability for the investors and unlimited liability plus total control for the manager, and you have exactly the container institutional capital wants: passive, protected, tax-neutral money handed to an active manager who is fully on the hook. Every other feature of a fund is built on top of that base.
A Fund Holds Commitments, Not Cash: the Capital Call
The single most misunderstood fact about a fund is that it does not hold the money it has “raised.” When an LP commits £50m to a fund, it does not wire £50m on day one. It signs a binding promise — a commitment — to provide up to £50m as and when the GP asks. The cash stays with the LP, earning a return elsewhere, until the GP issues a capital call (also called a drawdown): a notice, typically giving ten business days, demanding a slice of each LP’s commitment to fund a specific purpose — an acquisition, a follow-on, or the management fee. A £1bn fund is £1bn of promises, drawn down deal by deal over years, not £1bn sitting in an account.
This mechanism explains the shape of a fund’s cash flows and much of what the performance metrics are measuring. Because money is called only when it is needed, an LP’s capital is put to work gradually, and the fund’s reported returns start negative: fees and early deal costs are drawn before any exit sends cash back, which is the mechanical origin of the J-curve. It is also why the industry distinguishes committed capital from called (or drawn) capital, and why dry powder — committed but not yet called — is a headline figure: it is money the funds are legally entitled to demand but have not yet deployed. Understanding that a commitment is a callable promise, not a deposit, is the difference between knowing what a fund is and reciting its size.
The Ten-Year Clock: an Investment Period and a Harvest Period
A private equity fund is a closed-end, finite-life vehicle, and the standard life is ten years, commonly extendable by two further one-year periods at the GP’s or the LPAC’s discretion. That clock is split in two. The first roughly five years are the investment period (or commitment period): the only window in which the GP is permitted to call capital for new platform investments. Most platforms are bought in years one to four, with year five as the tail for final deals and add-ons. After the investment period ends, the GP generally cannot make new platform acquisitions without LP consent — it can only support and add on to what it already owns.
The back half, years six to ten, is the harvest period: the GP manages the portfolio, drives operational improvement, and works toward exits, with most disposals clustering in years five to nine. This finite life is not a technicality — it is the source of one of the industry’s defining pressures. Because the fund must wind down and return capital by its deadline, a GP holding assets late in the fund’s life is a forced seller, obliged to exit into whatever market exists at the time rather than the one it would choose. That deadline is exactly what has driven the recent boom in continuation funds and the DPI drought: when the ten-year clock demands liquidity and the exit market is shut, GPs reach for structures that buy time. The fund’s finite life is the clock the whole industry runs against.
The GP Commitment: the Manager’s Own Money on the Line
Alignment in private equity is not a slogan; it is a number in the LPA. The GP commitment is the amount the fund’s managers invest in their own fund, alongside the LPs and on the same terms, so that they lose real money if the fund does. Historically the rule of thumb was 1% of the fund, but LPs have pushed it up, and the median is now higher: Carta’s 2025 fund-economics data puts the median GP commitment for buyout funds in the $100m–$500m range at roughly 2.5% of committed capital, with the broader range spanning 1% to 5%. On a £1bn fund, a 2.5% commitment is £25m of the partners’ own capital at risk.
Why LPs care so much about this figure is straightforward: it is the cleanest test of whether the GP is playing with its own money or only with other people’s. A manager that funds a large GP commitment from its own pocket — rather than by waiving fees or borrowing — has genuine downside if the fund underperforms, and the carry it earns on the upside is stacked on top of a real personal loss it would take on the downside. The distinction matters because carry is asymmetric: the GP shares in gains but never writes a cheque for losses. The GP commitment is the one place where the manager does bear loss, which is why LPs scrutinise its size and its source, and why a thin or fee-funded commitment is a red flag that the alignment the marketing promises is not really there.
Three Entities, Not One: the Fund, the GP, and the Management Company
The word “fund” is used loosely, but a real private equity structure is at least three separate legal entities, and confusing them is one of the fastest ways to sound like you have read about the industry rather than worked in it. The fund is the limited partnership that holds the investments and the LPs’ capital. The general partner is a separate entity that sits atop the fund, holds the control rights and unlimited liability, and is the vehicle through which the partners receive their carried interest. The management company (the “ManCo”) is the operating business — the firm itself, employing the deal team and the back office — and it is the entity that receives the management fee.
Splitting the two income streams across two entities is deliberate and reveals how the economics actually work. The management fee flows to the ManCo and pays the salaries, rent, and overhead that keep the firm running year to year — it is the firm’s operating budget, not its profit. The carry flows to the GP and is split among the partners as their share of the fund’s gains — it is the wealth-creation engine, but it arrives years later and only if the fund performs. A candidate who can say that the fee funds the lights and the carry funds the partners — that these are different entities receiving different money for different reasons — is describing the firm as its own finance team sees it. It is also why the fee-versus-carry balance is the central tension in a firm’s culture: the bigger the assets and the fee stream, the less the partners need the carry, which is the shift at the heart of how the listed megafirms actually make money.
The LPA: Where the Real Terms Live
Everything above is codified in one document: the limited partnership agreement, the contract between the LPs and the GP that governs the fund for its entire life. Students fixate on the two economic terms — the management fee and the carry — but the LPA’s governance provisions are what decide who controls the money when a deal or a manager goes wrong, and those are the terms a sophisticated LP negotiates hardest. The economics set what the GP earns; the governance sets what the LPs can do about it.
Four provisions carry most of the weight. The key-person clause protects LPs against the departure of the individuals they backed: if named senior partners stop devoting sufficient time to the fund, the investment period is automatically suspended — the GP cannot call capital for new deals — until LPs vote to resume or replace them. Its bite depends entirely on the drafting: tight language (“substantially all” of a named partner’s time) protects LPs, while loose language (“a majority of professional time”) lets partners spread themselves across funds, which is precisely what the clause exists to prevent. Removal rights come in two flavours: for-cause removal (for fraud, gross negligence, or breach, usually needing only a simple majority) and no-fault removal — the “no-fault divorce” — which lets LPs remove the GP or end the fund without proving misconduct, typically requiring a high supermajority of around 75%. The LP advisory committee (LPAC), drawn from the largest LPs, does not run the fund but signs off on conflicts of interest — related-party deals, continuation funds, valuation disputes. And recycling provisions govern whether early proceeds can be re-invested rather than distributed, which quietly increases how much capital the GP actually puts to work.
How the Fee Base Shifts Across the Fund’s Life
One detail rewards a closer look because it catches candidates who half-remember “2 and 20.” The management fee is not a flat 2% of the fund forever. During the investment period, the fee is charged on committed capital — the full fund size — because the GP is actively sourcing and needs the whole team funded regardless of how much has been called. A median 2% on committed capital is the benchmark, though buyout funds have seen real compression, with average rates falling toward ~1.6% as LPs push back on the fee a large fund throws off. After the investment period ends, the fee base steps down: it is typically charged on invested (or net invested) capital — the cost of deals still held — rather than the full commitment, so the fee shrinks as the portfolio is realised.
That step-down matters more than it looks. On committed capital, a £1bn fund at 1.6% pays the ManCo £16m a year whether or not a single deal has closed — which is why a fund’s fee income is front-loaded and certain, and why the fee stream is a business the market will pay for independent of investment performance. Once the fee shifts to invested capital and the portfolio is being sold down, the fee tapers, pushing the partners’ attention onto the carry that only crystallises on exit. The changing fee base is the mechanism that is supposed to swing a manager’s incentive from “raise and deploy” early in a fund to “realise and return” late in it — and reading the exact fee definition in the LPA, committed versus invested, tells you how quickly that swing happens.
Where the Fund Structure Connects to Everything Else
The fund is the container every other piece of private equity mechanics sits inside, which is why it is worth learning first rather than last. The J-curve is a direct consequence of the capital-call mechanism — fees and costs drawn before exits return cash. Subscription lines are a facility that lets the GP delay the very capital calls this structure is built on, borrowing against the LPs’ unfunded commitments to smooth cash flow and flatter early IRR. Fund performance metrics — IRR, MOIC, DPI, TVPI — are all measured against called and distributed capital, quantities that only make sense once you understand a commitment is a callable promise.
Set against the firm as a whole, the fund structure is also where the economics of management fees and the carried-interest waterfall attach. The fee and carry are numbers in the LPA; the entities that receive them are the ManCo and the GP; the finite life is the clock that forces the exits those returns are measured on. Learn the container and each of those pieces stops being a standalone fact to memorise and becomes a feature of one coherent structure — which is exactly how someone who has worked on a fund understands it, and how an interviewer can tell you have.
The Verdict: the Structure Is the Alignment — Read It Before the Returns
The honest description of a private equity fund is a legal machine built to point a manager’s incentives in the same direction as its investors’, and to cap what happens when they diverge. The limited partnership makes the money passive, protected, and tax-neutral; the capital-call mechanism keeps it working elsewhere until it is needed; the ten-year clock forces discipline and realisation; the GP commitment puts the manager’s own capital at risk; and the LPA’s governance decides who controls the fund when a person leaves or a deal sours. None of that is visible in the “2 and 20” shorthand that stands in for the whole thing.
For a student, the discipline is to stop treating a fund as a synonym for “a pile of money a firm invests.” The candidate who stands out explains the structure as a set of deliberate trade-offs: pass-through tax and limited liability bought with passivity, control handed to the GP but checked by removal rights, alignment engineered through the GP commitment and the back-ended carry, and a finite life that guarantees the money comes back. Knowing that the terms that matter most when a fund goes wrong are the governance ones, not the fee, is the tell that separates someone who has read about private equity from someone who has read an LPA.
Careers: This Is the Structure Behind Every Number an Associate Touches
For an analyst or associate at a private equity firm, the fund structure is not background — it frames every model and memo. The investment case an associate builds is underwritten against the fund’s remaining life, so a deal that needs seven years to mature does not fit a fund with four years left on the clock. The returns the model targets are the fund’s hurdle and carry, not abstract ones. And the capital that funds the deal is called from LPs under the LPA the associate rarely reads but always works inside — which is why the sharper juniors learn where the fund is in its life, how much dry powder remains, and what the fee step-down does to the firm’s budget, rather than treating the fund as an infinite source of money.
On the fundraising and investor-relations side, and for anyone moving toward the buy-side of the buy-side — the LPs, funds-of-funds, and allocators who commit to these partnerships — the LPA is the job. Diligencing a GP means reading the key-person clause, testing the removal thresholds, checking the GP commitment’s size and source, and modelling the fee drag across the fund’s life before a penny is committed. A candidate who can sit on either side of that table — who can explain why a GP drafts a loose key-person clause and why an LP fights for a tight one, why the fee base shifts from committed to invested capital, and what a 75% no-fault threshold really protects — is demonstrating exactly the fluency the funds and the allocators are hiring for.
Take Your Preparation Further
The fund structure only pays off when you connect it to the mechanics that live inside it, so read this next to the J-Curve, which is the capital-call mechanism seen through a fund’s cash flows, and Management Fees, where the committed-versus-invested fee base is worked through in detail. For the carry the GP entity receives, see the Carried-Interest Waterfall, and for how the whole thing is measured, PE Fund Performance Metrics. To see how a GP borrows against the very commitments this structure is built on, read Subscription Lines.
To prepare for the fund-structure and governance questions that come up in PE interviews — from “walk me through how a fund is structured” to the key-person and waterfall follow-ups — work through the model answers in our PE Interview Guide, and for the complete set of case studies and modelling drills, the PE Prep Bundle.
Ready for personalised feedback? Book a 1-on-1 mentoring session with an experienced IB/PE professional.
Frequently asked questions
How is a private equity fund structured?
A private equity fund is structured as a limited partnership rather than a company. The investors — pension funds, endowments, insurers, and sovereign wealth funds — are the limited partners (LPs): they provide almost all the capital, stay passive, and have their liability capped at the amount they commit. The firm runs the fund through a general partner (GP) entity, which makes every investment decision and carries unlimited liability. The limited partnership form is used because it is tax-transparent — profits pass straight through to the LPs without a layer of tax at the fund level — and because it pairs limited liability for investors with total control for the manager. In practice there are at least three separate entities: the fund (the limited partnership that holds the investments), the general partner (which holds the control rights and receives the carried interest), and the management company (the operating firm that employs the team and receives the management fee). The fund holds commitments rather than cash, has a finite ten-year life split into an investment period and a harvest period, and is governed throughout by the limited partnership agreement (LPA).
What is a capital call in private equity?
A capital call (also called a drawdown) is the notice a fund’s general partner issues to its limited partners demanding a portion of the money they have committed. It is the mechanism that makes a fund a pool of promises rather than a pool of cash. When an LP commits, say, £50m to a fund, it does not wire the money upfront — it signs a binding commitment to provide up to £50m when asked, and the cash stays on the LP’s own balance sheet earning a return until it is called. The GP then issues capital calls, typically giving around ten business days’ notice, to fund specific needs: an acquisition, a follow-on investment, or the management fee and expenses. Each call reduces the LP’s remaining unfunded commitment. Because capital is drawn down gradually over the roughly five-year investment period, and fees and early costs are called before any exit returns cash, the fund’s reported returns start negative — the origin of the J-curve. The distinction between committed capital (the full promise) and called or drawn capital (what has actually been demanded) is central to how PE funds and their performance metrics work; the difference that has been committed but not yet called is the industry’s “dry powder.”
What is the typical life of a private equity fund?
The standard private equity fund life is ten years, commonly extendable by two further one-year periods at the discretion of the GP or the LP advisory committee. The ten years are split into two halves. The first roughly five years are the investment period (or commitment period), the only window in which the GP can call capital to make new platform investments — most platforms are acquired in years one to four, with year five as the tail for final deals and add-ons. The back five years are the harvest period, when the GP manages the existing portfolio, drives operational improvement, and works toward exits, with most disposals clustering in years five to nine. After the investment period ends, the GP generally cannot make new platform acquisitions without LP consent. The finite life is not just administrative — it is a defining pressure of the asset class, because the fund must wind down and return capital by its deadline, which makes a GP holding assets late in the fund’s life a forced seller into whatever market exists at the time. That deadline is a large part of what has driven the rise of continuation funds and fund-term extensions when the exit market is shut.
What is a GP commitment and why does it matter?
A GP commitment is the amount a fund’s own managers invest in their fund, alongside the limited partners and on the same terms, so that the manager loses real money if the fund underperforms. It is the cleanest measure of alignment in private equity. The historical rule of thumb was 1% of the fund, but LPs have pushed it higher: recent data puts the median GP commitment for mid-sized buyout funds at roughly 2.5% of committed capital, with a broader range of 1% to 5% — so on a £1bn fund, the partners might have £25m of their own capital at risk. It matters because carried interest is asymmetric: the GP shares in the fund’s gains but never writes a cheque for its losses. The GP commitment is the one place where the manager genuinely bears downside, which is why LPs scrutinise not just its size but its source — a commitment funded from the partners’ own pockets signals real skin in the game, whereas one funded by waiving fees or borrowing weakens the alignment it is meant to demonstrate.
What are the key terms in a limited partnership agreement (LPA)?
The limited partnership agreement is the contract between the LPs and the GP that governs a fund for its entire life. Beyond the headline economics — the management fee (a median 2% of committed capital during the investment period, with buyout averages compressing toward around 1.6%, then typically stepping down to a charge on invested capital afterward) and the carried interest with its preferred return — the terms that decide who controls the money are the governance provisions. The key-person clause protects LPs if the named senior partners they backed stop devoting sufficient time to the fund: it automatically suspends the investment period, freezing new investments, until LPs vote to resume or replace them. Removal rights come in two forms: for-cause removal (for fraud, gross negligence, or breach, usually needing only a simple majority) and no-fault removal — the “no-fault divorce” — which lets LPs remove the GP or end the fund without proving misconduct, typically requiring a high supermajority of around 75%. The LP advisory committee (LPAC), drawn from the largest investors, signs off on conflicts of interest such as related-party deals and continuation funds. Recycling provisions govern whether early proceeds can be reinvested rather than distributed. The ILPA Model LPA exists to give LPs a balanced starting point on exactly these governance terms.