TL;DR. A leveraged buyout (LBO) is an acquisition financed mostly with borrowed money, where the target company’s own cash flow services the debt. Returns come from three places: paying down that debt over time, growing earnings, and selling the company for a higher multiple than you paid. The math is brutal when it works and brutal when it doesn’t, which is why so many of the biggest LBOs in history have ended at the extreme tails of the outcome distribution.
EQT’s £9.4 billion take-private of UK testing group Intertek announced this week is a textbook example of the structure still in heavy use 40 years after KKR popularised it. So is the $55 billion Electronic Arts deal that re-set the record for largest LBO ever in 2025. This piece walks through how the structure actually works, where the returns come from, and where deals go to die.
What an LBO actually is
The simplest definition: an LBO is an acquisition in which a financial sponsor (usually a private-equity fund) buys a company using a small slice of its own equity and a much larger slice of debt borrowed against the target. The debt is the target’s debt after closing, not the sponsor’s. The interest and principal payments come out of the target’s operating cash flow.
That is the whole trick. By substituting borrowed money for equity, the sponsor concentrates the upside on a small equity check. If the company’s enterprise value goes from 100 to 120 over four years, an all-equity buyer makes a 20% return. A buyer who put up 30 of equity and 70 of debt, and used cash flow to pay the debt down to 40, makes (120 − 40) ÷ 30 = 2.67x their money. Same operating performance, very different equity outcome.
Leverage is the engine. Cash flow stability is the fuel. That is why LBO targets cluster in industries with predictable revenues — testing labs, healthcare services, software with recurring contracts, basic consumer staples, regulated utilities — and almost never in capital-light, high-volatility businesses where a bad quarter can break a covenant.
The capital structure
An LBO capital structure is layered by seniority. Senior secured loans sit at the top — first in line to be paid, secured against the target’s assets, and the cheapest debt in the stack. Senior unsecured and high-yield bonds sit below. Mezzanine debt or preferred equity, when used, sits below that. The sponsor’s common equity is the residual claim and the most expensive piece of capital because it absorbs the first dollar of loss.
Two ratios matter more than any other when reading an LBO: debt / EBITDA and EBITDA / interest expense. Debt / EBITDA tells you how many years of cash earnings it would take to pay the debt off; deals in modern markets typically price somewhere between 5x and 7x at close, though the range expands and contracts with credit conditions. EBITDA / interest tells you the cushion for paying interest; under roughly 2x and the deal is fragile.
A worked example
Suppose a sponsor buys a healthy mid-market software company for an enterprise value of $1.0 billion at 10x trailing EBITDA. EBITDA is therefore $100 million. The sponsor funds it with $700 million of debt (7x EBITDA) and $300 million of equity.
Over a five-year hold, two things happen. First, the company grows EBITDA from $100 million to $140 million (a 7% compound rate, achievable for a decent SaaS roll-up). Second, the sponsor uses excess free cash flow to pay debt down from $700 million to $400 million. At exit, the sponsor sells the business for the same 10x EBITDA — call that a “no multiple expansion” scenario — for a $1.4 billion enterprise value.
Equity proceeds at exit are $1.4 billion enterprise value minus $400 million remaining debt = $1.0 billion. The sponsor invested $300 million and gets back $1.0 billion. That is a 3.3x multiple of invested capital (MOIC) and roughly a 27% gross internal rate of return (IRR) over five years. Note the two amplifiers: the company is only 40% bigger on an enterprise basis, but the equity is 3.3x. Debt paid down and earnings grew; the equity gets both.
Where the returns actually come from
Decompose any LBO outcome and you will find three sources of equity return. Practitioners call these the value bridge.
1. Debt paydown. Every dollar of free cash flow used to retire debt is a dollar of equity created, because equity is what is left after debt is paid. In a high-leverage deal, this can be the dominant return source even with flat operating performance.
2. EBITDA growth. Grow earnings and the same exit multiple yields a bigger enterprise value. Sponsors push growth through pricing, cost takeouts, bolt-on acquisitions, and operational changes. This is the source most defensible at a fund-marketing roadshow.
3. Multiple expansion (or contraction). Sell at a higher multiple than you paid and the differential drops straight to equity. Sell at a lower one — because credit markets have tightened, comparables have de-rated, or the business has shrunk into a less attractive bucket — and it cuts the other way. This is the source most outside the sponsor’s control and the one most likely to surprise.
The deals that defined the playbook
| Target | Year | Deal value | Sponsor(s) | Outcome |
|---|---|---|---|---|
| Beatrice Companies | 1985 | $6.0B | KKR | Profitable break-up |
| RJR Nabisco | 1989 | $31.0B | KKR | Modest sponsor return |
| HCA Healthcare | 2006 | $33.0B | Bain, KKR, Merrill, Frist family | 2011 re-IPO; strong return |
| TXU Energy (Energy Future Holdings) | 2007 | $45.0B | KKR, TPG, Goldman | 2014 bankruptcy |
| Dell | 2013 | $24.4B | Silver Lake, Michael Dell, $2B Microsoft loan | 2018 re-listing |
| Twitter (now X) | 2022 | $44.0B | Elon Musk; debt arranged by Morgan Stanley syndicate | Held private; debt repeatedly marked down by lenders |
| Electronic Arts | 2025 | $55.0B | PIF, Silver Lake, Affinity Partners | Pending close — largest LBO on record |
The two ends of the table tell the story. HCA’s sponsors paid $33 billion in 2006, took the company through the financial crisis using its predictable hospital cash flows to service debt, re-listed in 2011 and reportedly generated a multi-billion-dollar profit. TXU’s sponsors paid $45 billion the very next year for a Texas power generator at the top of a natural-gas-price cycle, then watched the shale gas revolution collapse merchant power prices and trip every leverage covenant on the way to a 2014 Chapter 11.
Same playbook. Same era. Vastly different cash-flow stability. The difference between a great LBO and a disaster is rarely the financial engineering — it is whether the cash flow holds up.
Covenants and the things that can go wrong
Loan agreements impose maintenance covenants (tests the borrower must pass every quarter, typically on leverage and interest coverage) and incurrence covenants (tests that gate certain actions like new debt or dividends). When markets are loose, covenant-lite structures relax the maintenance side. When markets tighten, covenants snap back.
Common ways an LBO breaks: a cyclical downturn cuts EBITDA below covenant levels; a refinancing comes due in a closed credit market; the multiple at exit is lower than the multiple at entry (the brutal arithmetic of buying at peak vintages); a single regulatory or technology shift collapses a moat the underwriting model assumed was permanent. Bankruptcies in PE-backed companies tend to cluster a few years after credit-bubble vintages — the 2014-2017 wave traced back to 2006-2007 deals, and the next wave will almost certainly be sourced from 2020-2022 vintages priced at peak multiples on cheap debt.
Related concepts and what to learn next
- Merger Arbitrage Explained — the public-market mirror of LBO deal-making.
- Secondaries and continuation funds — how sponsors hold winning portfolio companies longer than the original fund life.
- Private credit — the asset class that increasingly funds the senior tranche of these structures.
- Bond duration and convexity — the same yield mechanics that price LBO debt at the margin.
- Suggested next read: how to read an income statement, because every line of LBO underwriting starts there.
Sources
- Wikipedia — Leveraged buyout (history, capital structure, record deals)
- Wikipedia — HCA Healthcare (2006 deal value, sponsors, 2011 re-IPO)
- Wikipedia — Dell (2013 going-private, $24.4B, Silver Lake/Microsoft loan)
- Wikipedia — Acquisition of Twitter by Elon Musk ($44B, 2022)
- S&P Global — Leveraged Loans research (current market structure)
- Corporate Finance Institute — LBO value creation (value bridge framework)
- SEC EDGAR (primary filings for any public-to-private transaction)
Disclosure: This article was produced with AI assistance and reviewed before publication. It is for informational purposes only and is not investment advice.