What drives LBO returns

There are exactly three ways an LBO makes money. Debt paydown. EBITDA growth. Multiple expansion. That's it. Every return a sponsor earns traces back to one of those three levers, and a strong interview answer names all three and ranks them by how much you actually control.

Most candidates lean on the wrong one. They assume you buy at 10x and sell at 12x and call it a day. But multiple expansion is the lever you control least. The two you actually earn are deleveraging and growth. Get that ordering right and you already sound like someone who has sat in the seat.

Lever 1: debt paydown (deleveraging)

This is the quiet workhorse. You buy the company with a lot of debt, then the business's own free cash flow pays that debt down year after year. Enterprise value can sit completely flat and your equity still grows, because equity is what's left after debt.

Remember the bridge: $\text{Equity} = \text{EV} - \text{Net Debt}$. If enterprise value holds steady but net debt drops, equity value climbs by exactly the amount of debt you retired. You're converting the lender's claim into your own.

That paydown comes from the cash sweep: after the company pays interest, taxes, and capital expenditures, leftover cash goes to knocking down principal. A stable, low-capex business throws off a lot of that cash, which is precisely why sponsors hunt for boring, predictable companies.

Lever 2: EBITDA growth

Grow the profit and, at any fixed exit multiple, the whole enterprise is worth more. You grow EBITDA two ways: sell more (revenue growth) or keep more of each dollar (margin expansion). Both count. A sponsor buying a company at $100 of EBITDA and exiting at $150 has manufactured 50% more enterprise value at the same multiple, before a single dollar of debt gets touched.

This is the lever operators respect, because it's real value creation. You made the business better. Revenue growth plus margin expansion is what turns a mediocre deal into a great one when the multiple doesn't cooperate.

Lever 3: multiple expansion

Buy at a low multiple, sell at a higher one. Buy at 10x EBITDA, exit at 12x, and you've captured two turns of value you didn't build. It's real money when it happens.

Here's the catch: you don't control it. Exit multiples depend on where the market is in five years, who the buyers are, and how the sector is trading. You can't underwrite a deal assuming the multiple goes your way. Serious sponsors model a flat multiple (buy at 10x, sell at 10x) and treat any expansion as upside, not as the plan.

Why leverage amplifies the equity return

Leverage doesn't make a company more valuable. It concentrates whatever value gets created onto a smaller equity base.

Say a business is worth $1,000 today and $1,500 in five years. Buy it with all equity and you turn $1,000 into $1,500: a 1.5x return. Now buy the same business with $600 of debt and $400 of equity. Over the hold, free cash flow pays the debt down from $600 to $300, so $300 is still owed when you sell. Your equity at exit is $1,500 minus that $300, or $1,200. You turned $400 into $1,200: a 3.0x return on the same business.

The lenders never share the upside. They take fixed interest and their principal back, and everything above that lands on your thin equity slice. That's the amplifier. It cuts both ways, though. If the business is worth $800 at exit instead of $1,500, the all-equity buyer is down a little and the levered buyer can be nearly wiped out. Leverage magnifies the downside exactly as hard.

A clean entry-to-exit bridge

Walk it in round numbers. This is the sequence you want reflexive.

Entry. Buy a company with $100 of EBITDA at a 10x multiple. Purchase price (enterprise value) is $1,000. Fund $600 with debt and write a $400 equity check.

Hold (5 years). Grow EBITDA from $100 to $150. Over those five years, free cash flow sweeps the debt from $600 down to $300.

Exit. Sell at the same 10x multiple. Exit enterprise value is $1,500 (that's $150 \times 10$). Subtract the $300 of remaining debt to get $1,200 of equity.

Return. MOIC is exit equity over entry equity: $1,200 divided by $400 is 3.0x. Over a five-year hold, that's roughly a 25% IRR.

Now attribute that $800 of equity gain (from $400 to $1,200) to the levers:

| Lever | What moved | Contribution | | --- | --- | --- | | EBITDA growth | $100 → $150 at 10x | +$500 EV | | Debt paydown | $600 → $300 | +$300 equity | | Multiple expansion | 10x → 10x (flat) | $0 |

Growth and deleveraging did all the work. The multiple never budged, and the deal still tripled the money.

If you want the return metrics themselves (MOIC, IRR, and the mental bridge between them) worked from scratch, see The LBO and the paper LBO. For the equity-versus-enterprise-value plumbing behind the exit bridge, see Enterprise value vs. equity value.