Private Equity Funds Explained: How They Work, Where the Money Comes From, and How They Make Returns

Private equity funds raise institutional capital and use it to buy private companies. The structure is simple at the highest level: a General Partner (the PE firm itself) raises a closed-end fund from Limited Partners (the institutional investors). The fund is used to acquire 8-15 portfolio companies over a 4-5 year investment period. Each company is held for 3-7 years, then sold. After all exits, the fund returns capital and profits to LPs and is wound down.

But the mechanics behind that simple structure are intricate. How does a PE firm raise a fund? Where does LP capital actually come from? What strategies do PE firms run, and how do those strategies differ in risk and return? How do PE firms generate returns — what fraction comes from operational improvement vs. financial engineering vs. multiple arbitrage? How do they source deals at the top of the funnel? And what does this all mean for a business owner who might be sold to (or recapitalized by) one of these funds?

This guide is the comprehensive overview. It covers PE fund structure (GPs, LPs, fees, waterfall), the institutional capital ecosystem, the major strategy categories, the math of how returns get generated, and how PE firms find their deals. By the end, business owners and curious readers should have a clear picture of how this $4-7 trillion asset class actually operates.

One frame to keep in mind: PE funds are operational businesses, not financial trading shops. The capital is institutional. The structure is financial. But the work is operational — identifying companies that can be improved, acquiring them at reasonable multiples, executing 5-year value creation plans, and exiting to higher-multiple buyers. Funds that succeed are usually the ones with the best operational discipline; funds that fail typically miss on company-level execution.

“PE funds aren’t buying companies to flip them — they’re buying companies to operate, grow, and exit at multiples of the entry value. Every deal is underwritten to a 5-year value creation plan.”

Key Takeaways

• PE funds are closed-end vehicles with 10-12 year lives. They raise institutional capital, invest over 4-5 years, and exit positions over years 5-10.
• LP capital sources: public pensions (~30% of PE capital), private pensions (~20%), endowments and foundations (~15%), sovereign wealth funds (~12%), family offices (~10%), insurance and others (~13%). Approximate ranges vary by year and source.
• Major strategies: leveraged buyouts (control acquisitions of mature businesses, dominant strategy), growth equity (minority stakes in growth companies), distressed (turnaround), mezzanine (subordinated debt + equity).
• Returns are generated through three drivers: EBITDA growth (operational improvement and add-on M&A), debt paydown (acquisition debt amortizes during hold period), and multiple expansion (selling at higher EBITDA multiple than entry).
• Top-quartile PE funds target 20-25% gross IRR / 2.5-3.0x MOIC. Net to LPs (after 2/20 fees and 8% hurdle): 15-20% IRR, 1.8-2.4x MOIC.
• Deal sourcing happens through investment bankers, proprietary outreach, sector specialists, repeat seller relationships, and platform-level add-on M&A. The ratio of opportunities reviewed to deals closed is typically 100:1 or higher.

What is a private equity fund?

A private equity fund is a closed-end investment vehicle structured as a limited partnership. The General Partner (GP) is the PE firm itself — an entity controlled by the firm’s senior partners. The Limited Partners (LPs) are the institutional and individual investors who commit capital. The fund has a defined life (typically 10 years with 1-2 year extension options), a defined investment period (typically 4-5 years during which new investments are made), and a defined harvesting period (typically years 5-10 during which portfolio companies are exited).

Capital is committed but not immediately funded. LPs commit capital at fund close (e.g., a pension fund commits $100M to Fund X). The capital sits with the LP until the GP ‘calls’ it for specific investments. When the GP closes a deal requiring $50M of equity, it issues a capital call to LPs proportional to their commitments. The LP wires the cash within 10-15 business days. Over the fund’s investment period, the GP gradually calls 100% of committed capital.

Funds are typically named by sequence and vintage. Fund I, Fund II, Fund III, etc. Successful firms raise progressively larger funds. KKR’s first fund in 1976 was $30M; KKR’s flagship fund as of 2024 exceeds $20B. Many large PE firms now manage multiple parallel fund families: a flagship buyout fund, a growth equity fund, an Asia fund, a real estate fund, and so on. Each is a separate legal entity with its own LP base and investment mandate.

The fund is the GP’s vehicle for executing strategy. The GP’s investment decisions, deal sourcing, due diligence, ownership management, and exits all happen within the fund structure. Fees and carry flow from the fund to the GP. Returns flow from portfolio company exits back through the fund to LPs. When all portfolio companies are exited, the fund is wound down and LPs receive their final distributions.

Where LP capital actually comes from

Public pension funds are the largest single LP category. California Public Employees’ Retirement System (CalPERS), California State Teachers’ Retirement System (CalSTRS), New York State Common Retirement Fund, Ontario Teachers’ Pension Plan (OTPP), Canada Pension Plan Investment Board (CPP Investments), and dozens of other public pensions allocate substantial portions of their multi-hundred-billion-dollar portfolios to private equity. Public pensions need long-duration assets that can match their long-dated liabilities; PE’s 7-10 year illiquidity matches this requirement and provides expected return premium over public markets.

Endowments and foundations are concentrated, sophisticated allocators. Yale, Harvard, Stanford, Princeton, MIT, and other large university endowments pioneered heavy PE allocation. These institutions have very long time horizons (perpetual, in theory), low spending requirements (typically 4-5% of NAV annually), and sophisticated internal investment teams. Top endowments allocate 25-50% of their portfolios to private equity and other illiquid strategies.

Sovereign wealth funds invest at scale. Singapore’s GIC and Temasek, the Abu Dhabi Investment Authority (ADIA), Kuwait Investment Authority (KIA), Norway’s Government Pension Fund Global, and Saudi Arabia’s Public Investment Fund (PIF) collectively manage trillions of dollars. They allocate substantial portions to private equity and often invest both in funds and directly in transactions alongside GPs (co-investments).

Family offices, insurance, and HNWIs round out the LP base. Single-family offices and multi-family offices serving high-net-worth families allocate to PE for return generation and diversification. Insurance company general accounts allocate modestly (constrained by regulatory capital rules). Individual HNWIs increasingly access PE through feeder funds, BDCs, interval funds, and dedicated retail products from the largest PE firms (Blackstone, KKR, Apollo, Ares). Access at $25k-$250k minimums is now widespread; access at sub-$25k minimums via 401(k) plans is starting to emerge in some plan structures.

How a PE fund actually charges fees and returns capital

Fee structure: 2 and 20 with an 8% hurdle. GPs typically charge a 2% annual management fee on committed capital during the investment period (years 1-5), often stepping down to 1.5-1.0% on invested capital during the harvest period (years 6-10). They earn 20% ‘carried interest’ on profits above an 8% ‘preferred return’ (also called ‘hurdle rate’) to LPs. Most funds also include a 100% catch-up after the hurdle is met, so the GP earns 20% of all profits above the hurdle threshold.

Distribution waterfall: how proceeds get split. When a portfolio company exits, proceeds flow through a waterfall. First, LPs receive their invested capital back (return of capital). Second, LPs receive the 8% preferred return on that capital. Third, the GP receives a ‘catch-up’ until the carry split reaches 80/20 on the cumulative profit. Fourth, all subsequent proceeds split 80% to LPs and 20% to GP as carry. The waterfall is deal-by-deal in some funds (‘American waterfall’) and whole-fund in others (‘European waterfall’ — more LP-favorable).

Net returns to LPs vs. gross fund returns. A fund returning 20% gross IRR (across all portfolio companies, before fees) typically delivers 14-16% net IRR to LPs after 2% management fees and 20% carry above the 8% hurdle. The fees compound — over a 10-year fund life, total fee drag is around 4-6% annualized. This is why LPs scrutinize fund-level performance carefully and concentrate capital with proven top-quartile managers.

Carry creates strong GP incentives. A successful $1B fund returning 2.5x net to LPs generates roughly $300-400M of carry to the GP — distributed among the partners. This is the core economics that motivate PE firms. Management fees fund operations; carry funds wealth creation. GP partners are typically required to commit 1-3% of fund size personally as a ‘GP commitment,’ aligning them with LP outcomes.

The major PE strategies

Leveraged buyouts (LBOs): the dominant PE strategy. LBO funds acquire controlling stakes in mature, profitable businesses using a mix of fund equity (30-50% of purchase price) and acquisition debt (50-70%). The debt is held at the portfolio company level (not the fund level) and is paid down using the company’s cash flow. LBOs target companies with predictable cash flows that can support meaningful leverage. Industries: business services, manufacturing, healthcare services, distribution, software, consumer products. Most large PE firms (Blackstone, KKR, Carlyle, Apollo, TPG, Bain Capital) have flagship LBO funds.

Growth equity: minority stakes in fast-growing businesses. Growth equity funds invest $20-200M in companies with $20M-$500M revenue, growing 20-50%+ annually. They take minority stakes (10-30%), often as preferred equity. The capital funds expansion, not founder liquidity. Holding period: 4-7 years. Target return: 3-5x cash-on-cash, 25-35% IRR. Examples: Summit Partners, TA Associates, General Atlantic, Spectrum Equity, Insight Partners. Sectors heavily concentrated in technology, healthcare, and tech-enabled services.

Distressed and special situations. Distressed funds invest in companies, debt, or assets in financial distress — often through bankruptcy proceedings, restructurings, or out-of-court workouts. Strategies include ‘loan-to-own’ (buying senior debt to convert to equity in restructuring), distressed equity (buying common equity in turnaround situations), and special-situations debt. Target return: 15-25% IRR. Volatility is higher than LBO. Examples: Apollo Global Management, Centerbridge Partners, Oaktree Capital.

Mezzanine and private credit. Mezzanine funds provide subordinated debt with equity warrants or co-investment rights. Returns: 12-18% (debt yield + equity upside). Borrowers are mid-market companies that need capital structure between senior debt and equity. Private credit (more broadly) has grown to a $1.5T+ asset class, providing direct lending to PE-owned portfolio companies and standalone borrowers. Major players: Ares, Blackstone Credit, KKR Credit, Apollo Credit.

Where PE returns actually come from

PE returns can be decomposed into three components: EBITDA growth, multiple expansion, and debt paydown. Industry studies and academic research generally find each contributes a meaningful share. The exact split varies by fund vintage, strategy, and market conditions. A common attribution framework: EBITDA growth ~40%, multiple expansion ~30%, debt paydown ~30%. These are approximate; some studies show wider ranges depending on methodology.

EBITDA growth: the ‘operational’ component. Over a 5-year hold, PE firms typically target EBITDA growth of 50-150% (compounded annually 8-20%). Growth comes from organic improvements (pricing, sales force, geographic expansion, new products) and from add-on acquisitions (small companies bought and integrated into the platform at lower multiples than the platform itself). PE firms with strong operating partner programs (Bain Capital, Apollo, Vista) emphasize this lever especially heavily.

Multiple expansion: the ‘market’ component. Selling at a higher EBITDA multiple than the entry multiple. A platform bought at 7x EBITDA and sold at 9x experiences 2-turn multiple expansion. This can come from market repricing (sector multiples rising), from scale (the company is now bigger and worth a higher multiple to bigger buyers), from operational momentum (faster growth at exit deserves a higher multiple), or from buyer competition (multiple bidders driving up the price). Multiple expansion is partially exogenous and partially earned.

Debt paydown: the ‘leverage’ component. At entry, the company carries acquisition debt of, say, 60% of enterprise value. Over the hold period, the company’s cash flow pays down a portion of that debt. Even with flat EBITDA and flat multiple, the equity value grows simply because debt has decreased. This is the ‘deleveraging’ effect. With 5-7% annual debt paydown rates, equity value can grow 30-50% from this component alone over a 5-year hold.

How PE firms source deals at the top of the funnel

Deal sourcing is the top of PE’s funnel and the work that determines whether a fund will succeed. PE firms typically review hundreds to thousands of potential investments per year (depending on firm size and strategy). They develop dozens further with formal diligence. They submit Letters of Intent on a small fraction. They close 2-6 platform deals per year per fund. This 100:1+ ratio of opportunities reviewed to deals closed is structural — not a sign of poor performance.

Investment bankers run most processes. When an owner decides to sell, they typically engage an investment banker (or M&A advisor) to run a competitive process. The banker prepares a Confidential Information Memorandum (CIM), targets 30-100 PE firms screened by industry/size/style, and runs a multi-round process producing 4-8 LOIs. The majority of PE platform acquisitions in the lower-middle and middle market come through banker-led processes.

Proprietary sourcing: increasingly important for differentiation. Top PE firms invest heavily in proprietary deal sourcing — building relationships with industry executives, attending sector conferences, hiring sector specialists, and conducting outbound campaigns to specific target companies. Proprietary deals often close at lower multiples (less competition) and with more PE-favorable terms. Mid-sized firms increasingly compete on proprietary sourcing capacity.

Add-on M&A: PE-owned platforms make most of the deal volume. Most lower-middle-market acquisitions actually happen at the platform-level — PE-owned companies acquiring smaller competitors as add-ons. A PE firm running a $300M platform in HVAC services might close 5-15 add-on acquisitions per year, each $1-30M in size. These add-ons typically pay 4-6x EBITDA (lower than the platform’s entry multiple of 7-10x) and immediately benefit from the platform’s scale. Multiple arbitrage between platform and add-on multiples is a primary value creation lever.

What this means for business owners

Understanding fund mechanics changes how you sell into PE. PE firms aren’t buying for emotional reasons or for the founder’s benefit. They’re buying because their fund needs to deploy capital, and they’re underwriting a 5-year value creation plan that gets them to a 2.5-3.0x return. Every diligence question, every term in the LOI, every discussion of the value creation plan ties back to those underwriting numbers.

Position your business against the value creation plan. PE firms ask: how do we double EBITDA in 5 years? Owners who can articulate clear answers (M&A roadmap, pricing leverage, geographic expansion, sales force investment) make stronger investments than owners who hand over financials and say ‘run it.’ The strongest sellers participate in articulating the value creation plan during the LOI stage.

Recognize the strategy fit. If your business is mature and profitable with predictable cash flow, an LBO fund is the natural buyer. If your business is fast-growing with unproven profitability, growth equity is the natural buyer. If your business is distressed, distressed funds are the natural buyer. Pitching a fast-growth tech company to a traditional LBO firm is a category mismatch — equally, pitching a 5%-growth business services company to a growth equity firm is a mismatch.

Know the fund’s vintage and remaining capital. PE firms in ‘harvest mode’ (years 6-10 of a fund) are not making new investments — they’re selling existing portfolio companies. Funds 1-2 years from new fund close are typically motivated to deploy remaining capital and may pay slightly higher prices to put dollars to work. Sophisticated sellers (or their bankers) check the fund vintage of every PE firm in the buyer pool to understand motivation and capacity.

Frequently misunderstood aspects of PE funds

Misconception 1: PE firms ‘flip’ companies for quick gains. Reality: average hold period is around 5 years. Some short-hold deals exist (especially in benign rate environments where multiple expansion is rapid), but the structural target is 3-7 years. PE firms underwrite 5-year value creation plans precisely because they expect to own and improve the business for that long. Quick flips (under 2 years) are uncommon and usually not the GP’s preference.

Misconception 2: PE firms strip assets and lay off employees. Reality: most PE firms grow their portfolio companies. Employment data from PE-owned businesses generally shows employment grows over the hold period in aggregate, though some sectors (manufacturing, especially) see consolidation. Aggressive cost-cutting happens in turnaround/distressed deals; in healthy LBO platforms, the focus is typically on growth (sales force investment, R&D, geographic expansion) rather than cost-cutting.

Misconception 3: PE returns are mostly luck or financial engineering. Reality: top-quartile vs. bottom-quartile PE fund returns differ by 10-15 percentage points of IRR — far more dispersion than in public markets. The dispersion reflects real skill differences in deal sourcing, valuation discipline, operational improvement capacity, and exit timing. Persistence of returns across funds (top-quartile firms tending to remain top-quartile) is also empirically observable, suggesting genuine skill, not just luck.

Misconception 4: PE is only for large companies and large investors. Reality: lower-middle-market PE is a substantial segment. Funds investing in $5-30M EBITDA businesses are abundant — firms like Hidden Harbor, Trivest, Riverside, Sterling, and dozens of other smaller firms run focused strategies in lower-middle-market. Individual access to PE has also expanded dramatically through retail-friendly products from major firms, lowering minimums to $25k-$50k in many vehicles. Both ends of the size spectrum (small companies, small investors) increasingly have PE access.

Conclusion

Private equity funds raise institutional capital, deploy it through control acquisitions of private companies, and return profits over a 10-12 year fund life. LP capital comes from pensions, endowments, sovereign wealth funds, family offices, and individual investors. Major strategies include leveraged buyouts (the dominant category), growth equity, distressed, and mezzanine. Returns get generated through three components — EBITDA growth, multiple expansion, and debt paydown — in roughly equal measure. Top-quartile funds target 20-25% gross IRR and deliver 15-20% net to LPs after fees. Deal sourcing is the top of the funnel and the work that ultimately determines fund success. For business owners, understanding these mechanics changes how to sell into PE: position against the value creation plan, target the right strategy category, recognize fund vintage and capital availability, and run a competitive process that creates leverage. The capital is institutional. The structure is financial. But the work, fundamentally, is operational — and the firms that succeed are the ones that operate well.

Frequently Asked Questions

What is a private equity fund?

A closed-end investment vehicle structured as a limited partnership. The General Partner (the PE firm) raises capital from Limited Partners (institutions and individuals), uses it to acquire 8-15 private companies over a 4-5 year investment period, holds each for 3-7 years, and exits over years 5-10. Total fund life: 10-12 years.

Where does PE fund capital actually come from?

Primarily institutional LPs. Public pensions account for roughly 30%; private pensions 20%; endowments and foundations 15%; sovereign wealth funds 12%; family offices 10%; insurance company general accounts 7%; and high-net-worth individuals (via feeder vehicles) around 6%. Approximate ranges; varies by year and methodology.

How big are typical PE funds?

Wide range. Lower-middle-market funds: $250M-$1B. Middle-market funds: $1-5B. Large-cap and mega-cap funds: $5-30B+. The largest flagship funds (Blackstone, KKR, Apollo, Carlyle) regularly close at $20B+. Each firm typically manages multiple parallel funds (flagship, growth, sector-focused, regional).

What are the main PE strategies?

Leveraged buyouts (control acquisitions of mature businesses, the dominant strategy), growth equity (minority stakes in fast-growing companies), distressed (turnaround/special situations), and mezzanine/private credit (subordinated debt with equity upside). Many large firms run all four under one umbrella; smaller firms typically focus on one strategy.

How do PE firms make money for their LPs?

Three return drivers. EBITDA growth (operational improvements + add-on M&A) contributes around 40% of returns. Debt paydown (acquisition debt amortizes from cash flow) contributes around 30%. Multiple expansion (selling at higher EBITDA multiple than entry) contributes around 30%. The exact split varies by deal and vintage.

What returns do PE funds target?

Top-quartile funds target 20-25% gross IRR and 2.5-3.0x MOIC. After 2/20 fees with an 8% hurdle, LPs net 15-20% IRR and 1.8-2.4x MOIC. Bottom-quartile funds can deliver near-zero or negative net returns. The dispersion is large — LPs concentrate capital with proven top-quartile managers.

What does ‘2 and 20’ with an ‘8% hurdle’ mean?

2% annual management fee on committed capital (often stepping down on invested capital after the investment period). 20% carry on profits above an 8% preferred return to LPs. The hurdle ensures LPs receive their committed capital back plus 8% IRR before the GP earns any carry. After the hurdle is met, a ‘catch-up’ provision typically lets the GP catch up to a 20/80 carry split on cumulative profit.

How does a PE fund actually deploy capital?

Through capital calls. LPs commit capital at fund close but don’t fund immediately. When the GP closes a deal, it issues a capital call to LPs proportional to their commitments. LPs wire capital within 10-15 business days. Over the 4-5 year investment period, the GP gradually calls 100% of committed capital, typically with some recycling of early-realized capital.

What’s the difference between LBO funds and growth equity funds?

LBO funds acquire control (51%+) of mature, profitable businesses using leverage. Growth equity funds take minority stakes (10-30%) in fast-growing companies, usually without leverage. LBO funds target slower-growth, predictable cash flow businesses. Growth equity targets companies growing 20-50%+ annually, often with unproven or thin profitability. Different strategies, different risk profiles, different return drivers.

How do PE firms find their deals?

Three main channels. Investment banker-led processes (most common for owners selling out) target 30-100 PE firms via competitive auction. Proprietary sourcing (relationships, sector specialists, outbound campaigns) generates differentiated deal flow. Add-on M&A through PE-owned platform companies generates the largest volume of lower-middle-market acquisitions. Top firms invest heavily in proprietary sourcing capability as a competitive differentiator.

How long do PE firms typically hold companies?

3-7 years average, with around 5 years being typical. Holding periods vary by strategy (growth equity often 4-7 years; LBO 4-6 years; distressed 2-5 years), market conditions (extended in tough exit environments), and individual deal trajectory (faster exits when value creation plan completes ahead of schedule). Quick flips (under 2 years) are uncommon.

Can individual investors access PE funds?

Increasingly, yes. Traditional minimums of $1-5M are now bypassed through feeder funds, BDCs, interval funds, and dedicated retail PE products from major firms (Blackstone’s BREIT/BCRED, KKR’s K-Series, Apollo’s suite). Minimums of $25k-$250k are common; some 401(k) plans are starting to include PE allocations. Sophistication and risk understanding still matter — PE remains illiquid and complex.

About the Author

Christoph Totter is the founder of CT Acquisitions, a buy-side deal origination firm headquartered in Sheridan, Wyoming. CT Acquisitions sources founder-led businesses for 75+ private equity firms, family offices, and search funds across the U.S. lower middle market ($1M–$25M EBITDA). Christoph writes about M&A from the perspective of someone on the phone with both sides of the deal table every week. Connect on LinkedIn · Get in touch