LBO Model and Paper LBO Explained: Steps & Example
LBO and paper LBO explained: structure, sources & uses, the three return drivers and a paper LBO example with MOIC and IRR for your IB interview.
LBO Model and Paper LBO Explained: Steps & Example (2026)
The leveraged buyout is the heart of private equity and one of the most tested techniques in the investment banking interview. This guide explains the LBO model clearly: how an LBO works, where the return comes from, and how to work through a paper LBO step by step in your head.
A leveraged buyout (LBO) is simple at its core: a financial investor buys a company mostly with debt, holds it for a few years, pays down debt over that time and sells it again at the end. This use of debt – the leverage – is both the name and the return engine.
For aspiring bankers the topic matters twice over. The LBO is the foundation of the entire private equity business, and the paper LBO – a quick back-of-the-envelope calculation with no calculator – is a standard interview task, especially on the buy-side. Master it and you signal real understanding of value and return.
In this guide you get the mechanics of an LBO (sources & uses, entry, hold, exit), the three return drivers, a full paper LBO worked example with MOIC and IRR, plus the typical mistakes and interview questions. For the building blocks, see our guides to DCF and EBITDA.
Table of contents
Why the LBO matters
The LBO is the business model of private equity. A PE fund buys companies, improves them over a holding period of usually three to seven years and sells them at a profit. Leverage from debt means that even moderate value gains translate into high equity returns – that is the core of the appeal.
In the interview the LBO is the second most important technical valuation method after the DCF. The paper LBO is asked especially in buy-side applications, but also in classic IB recruiting. It tests whether you can connect value, debt and return – and do it under time pressure, without a calculator.
The big advantage: the paper LBO always follows the same logic. Internalise the steps once and you can solve any variant. That is what makes it a rewarding, fully preparable task.
Fundamentals: what an LBO is
In a leveraged buyout, a financial investor (the sponsor) acquires a company and funds the purchase price largely with debt and the rest with its own equity. The acquired company itself carries the debt, and its cash flows are used to pay the interest and repay the debt over time.
Why use debt at all? For two reasons. First, leverage amplifies the equity return: the less of your own capital you put in, the more strongly a value gain affects your return. Second, interest is tax-deductible, which makes the financing cheaper (the tax shield).
The analogy: an LBO works like buying a property with a mortgage. You pay a small down payment (equity) and finance the rest with a loan (debt). The rental income (cash flows) pays down the loan. If the property value rises, the gain is yours – even though you invested only a fraction yourself.
The mechanics: sources, uses, entry, exit
Sources & uses
Every LBO starts with a sources-&-uses table. The uses show what money is needed for: mainly the purchase price (Enterprise Value), plus transaction fees and refinancing existing debt. The sources show where the money comes from: various debt tranches plus the sponsor equity, which fills the gap.
Debt comes in layers: senior bank loans (senior debt), subordinated tranches (subordinated / mezzanine) and sometimes high-yield bonds. The more junior, the riskier and more expensive. Total leverage is measured as debt to EBITDA (Debt/EBITDA).
| Uses | EUR m | Sources | EUR m |
| Purchase price (Enterprise Value) | 1,000 | Debt (5x EBITDA) | 500 |
| Sponsor equity | 500 | ||
| Total | 1,000 | Total | 1,000 |
Simplified example without transaction fees. Sources must always cover uses exactly.
Entry, hold and exit
The LBO runs in three phases. At entry, the sponsor buys the company at an entry multiple (e.g. EV/EBITDA). During the hold phase, it grows EBITDA and uses the free cash flows to pay down debt. At exit, it sells the company at an exit multiple – and the difference between exit equity and invested equity is the profit.
The three return drivers
An LBO return comes from exactly three sources. Whoever can name them has understood the model:
- 1. Deleveraging (debt paydown) The free cash flows repay debt over the holding period. Because the enterprise value stays roughly the same but there is less debt to subtract, the equity share grows automatically.
- 2. EBITDA growth If EBITDA rises (through revenue growth or better margins), the Enterprise Value at exit rises too, at a constant multiple.
- 3. Multiple expansion If the sponsor sells at a higher multiple than it paid, extra return is created. Conversely, multiple contraction costs return – which is why conservative models usually assume a constant multiple.
Remember: the most reliable driver is deleveraging, because it comes predictably from cash flows. EBITDA growth is the lever a good sponsor actively manages. Multiple expansion is the least in the investor control – relying on it is speculating.
Paper LBO: step by step
A paper LBO is the quick version of the model that you solve in an interview with pen and paper – or entirely in your head. The goal is to derive the return (MOIC and IRR) from a few assumptions. Here is how:
The following figures are a simplified illustrative example – not real market values.
- Step 1 – Entry EBITDA 100 × entry multiple 10x = Enterprise Value 1,000. Funded with 500 debt (5x EBITDA) and 500 equity.
- Step 2 – Hold Over 5 years EBITDA grows to 150. Free cash flows pay debt down from 500 to 250.
- Step 3 – Exit EBITDA 150 × exit multiple 10x = Enterprise Value 1,500. Less remaining debt 250 = exit equity 1,250.
- Step 4 – Return MOIC = 1,250 / 500 = 2.5x. The IRR over 5 years is roughly 20 %.
In this example the return comes from two drivers: debt paydown (500 to 250) and EBITDA growth (100 to 150). There is no multiple expansion, because the entry and exit multiples are identical (10x).
Handy IRR rule of thumb: doubling your equity (MOIC 2.0x) in 5 years is about 15 % IRR, a MOIC of 2.5x roughly 20 %, and 3.0x about 25 %. With these anchors you can estimate the IRR quickly in an interview without a calculator.
What makes a good LBO target
Not every company suits an LBO. Because the heavy debt load must be serviced reliably, sponsors look for specific traits. An ideal target has as many of them as possible:
- Stable, predictable cash flows. They are the precondition for servicing interest and repayment safely.
- Low cyclicality. A business that earns reliably even in weak years carries the debt better.
- Low capital expenditure (capex). The less money must go into fixed assets, the more is left for debt paydown.
- A strong market position. A competitive advantage protects margins and cash flows over the holding period.
- Room for improvement. Scope for efficiency, growth or add-on acquisitions lifts EBITDA and therefore the return.
Expert tips for the interview
- Work in four steps. Entry, hold, exit, return – this structure keeps you grounded and shows you think systematically.
- Use round numbers. In a paper LBO pick clean values (EBITDA 100, multiple 10x) so you can compute confidently without a calculator.
- Know the IRR anchors. 2.0x ≈ 15 %, 2.5x ≈ 20 %, 3.0x ≈ 25 % over 5 years – this saves precious seconds.
- Name the three drivers. Deleveraging, EBITDA growth, multiple expansion – framing them makes you sound assured.
- Understand the link to valuation. The LBO gives a floor value: the maximum price a PE investor can pay and still reach the target return.
Common mistakes
- Miscalculating the equity. Invested equity = Enterprise Value at entry minus debt. Get this wrong and the whole return is off.
- Forgetting remaining debt at exit. Exit equity is the exit Enterprise Value minus the debt that is left, not the full EV.
- Confusing MOIC and IRR. MOIC is a multiple (money out / money in), IRR is the annual return. They belong together but are not the same.
- Relying on multiple expansion. Conservative models assume a constant multiple. Generating the return only through a higher exit multiple sells a bet as analysis.
- Assuming unsuitable targets. An LBO needs stable, predictable cash flows. Highly volatile or young businesses cannot carry the debt load.
Best practices
Here is how to build a clean understanding of the LBO:
- Internalise the four steps of the paper LBO until you can recall them without thinking.
- Practise with round numbers and vary the multiple, leverage and growth to feel the levers.
- Memorise the IRR rules of thumb – they are gold in an interview.
- Understand which companies fit: stable cash flows, a strong market position, room for efficiency.
- Connect the LBO to the other methods in our guide to company valuation.
Comparison tables
The three return drivers in the example
| Driver | What happens | Effect in the example |
| Deleveraging | debt paydown via cash flow | debt 500 → 250 |
| EBITDA growth | operating growth | EBITDA 100 → 150 |
| Multiple expansion | higher exit multiple | none (10x → 10x) |
LBO vs. DCF vs. trading comps
| Method | Central question | Result |
| LBO | What price can a PE investor pay and still hit the target return? | floor value |
| DCF | What is the intrinsic value? | intrinsic value |
| Trading comps | What does the market pay for comparables? | market-based value |
In practice all three methods are used side by side and the value ranges are compared.
Pros and cons
Advantages of leverage
- Amplifies the equity return substantially
- Interest is tax-deductible (tax shield)
- Disciplines management (debt pressure)
- Clear exit logic and return measurement
Risks of leverage
- High debt raises the risk of default
- Requires stable, predictable cash flows
- Vulnerable to rising rates and recession
- Little buffer if plans go wrong
Frequently asked questions
What is an LBO in simple terms?
A leveraged buyout is the purchase of a company mostly with debt. The investor holds it for a few years, uses the cash flows to repay debt, grows EBITDA and sells it at a profit. The leverage amplifies the equity return.
What is a paper LBO?
A paper LBO is a quick back-of-the-envelope calculation with no calculator, usually in an interview. From a few assumptions (entry multiple, leverage, growth, exit multiple) you compute the return as MOIC and IRR.
Where does the return in an LBO come from?
From three sources: debt paydown (deleveraging), EBITDA growth and a possible multiple expansion. The most predictable driver is debt paydown from cash flows.
What is the difference between MOIC and IRR?
MOIC (multiple on invested capital) is a multiple: money returned relative to money invested. IRR is the annual return, taking the holding period into account. A MOIC of 2.5x over 5 years is roughly 20 % IRR.
Why do private equity funds use debt?
Because leverage amplifies the equity return and interest is tax-deductible. The less of its own capital the fund puts in, the more strongly a value gain affects the return.
Which companies are suitable for an LBO?
Firms with stable, predictable cash flows, low cyclicality, a solid market position and room for efficiency gains. They must be able to carry the interest and repayment load reliably.
What does Debt/EBITDA mean?
Debt/EBITDA measures leverage relative to operating earnings power. It shows how many years of EBITDA of debt sit on the company – a central risk measure for an LBO.
What is a typical holding period?
Usually three to seven years, often around five. In that time the sponsor pays down debt, grows EBITDA and prepares the exit – via a sale to a strategic buyer, to another fund or through an IPO.
What is the difference between an LBO and a normal acquisition?
A strategic buyer usually acquires a company mostly with equity and keeps it long term for synergies. An LBO by a financial investor uses a lot of debt, aims for a return over a limited holding period and plans the exit from the start.
How do I explain an LBO in an interview?
In four steps: entry (purchase price, split into debt and equity), hold (debt paydown and EBITDA growth), exit (sale at the exit multiple) and return (MOIC and IRR). The most efficient way to practise is with structured flashcards.
Conclusion
The LBO is the business model of private equity and one of the most important valuation methods in the interview. Its principle is leverage: buy a company mostly with debt, pay down debt and grow EBITDA over the holding period, then sell at a profit. The return comes from deleveraging, EBITDA growth and multiple expansion.
The paper LBO brings all of this down to four steps you can master in your head. Internalise them and the IRR rules of thumb, and you will solve any interview task with confidence – and that is exactly what you can prepare for.
Walk me through an LBO? Do it in your sleep.
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