How do you attribute LBO returns to their drivers?

Split the change in equity value into three buckets. EBITDA growth is the exit EBITDA less entry EBITDA, valued at the entry multiple. Multiple expansion is the change in multiple applied to exit EBITDA. Debt paydown is the reduction in net debt over the hold. The three should reconcile to the total change in equity value, and a sponsor will always claim credit for the first bucket.

Which return driver do sponsors actually control?

EBITDA growth and debt paydown. Multiple expansion depends on where the market is trading at exit, which nobody controls, so a disciplined sponsor underwrites to a flat or lower exit multiple. If a deal only clears the return hurdle because the multiple expands, the investment committee will treat that as a market bet rather than an operating plan.

Why can IRR and MOIC point in different directions?

MOIC ignores time and IRR does not. Doubling money in three years is a 26% IRR; doubling it in seven is 10%. So a deal with the higher MOIC can have the lower IRR if it takes longer. Sponsors are measured on both because IRR alone rewards selling early and MOIC alone rewards holding forever.

How does a dividend recap change returns?

It pulls cash forward. Re-levering the company to pay the sponsor a dividend mid-hold raises IRR substantially because early cash flows dominate the IRR calculation, while MOIC barely moves since total dollars returned are similar. It is the clearest case where the two metrics disagree by construction.

LBO

What drives LBO returns (Advanced)

By Michael Song · Wharton MBA · ex-Greenhill · investment banking interview coach

5 min read · updated July 30, 2026

The basic version tells you three things drive returns. The level 4 and 5 questions ask you to split a specific deal into those three buckets with numbers, then say which one you'd actually underwrite to.

Returns attribution with real numbers

Set up a deal. Entry at 8.0x on $100 of EBITDA, so a $800 purchase price, funded with $500 of debt and $300 of sponsor equity. Five years later EBITDA is $140, the exit multiple is 9.0x, and net debt has been paid down to $300.

Exit enterprise value is $140 \times 9.0 =$ $1,260. Exit equity is $1{,}260 - 300 =$ $960. Against $300 in, that's a 3.2x MOIC and about a 26% IRR.

Now attribute the $660 of equity value creation. Do it in this order and the buckets don't overlap:

EBITDA growth, valued at the entry multiple: $(140 - 100) \times 8.0 =$ $320
Multiple expansion, applied to exit EBITDA: $(9.0 - 8.0) \times 140 =$ $140
Debt paydown: $500 - 300 =$ $200

Total: $320 + 140 + 200 =$ $660. It reconciles.

Key insight

The order matters and it is not arbitrary. Value EBITDA growth at the entry multiple and multiple expansion at exit EBITDA, and each dollar is counted once. Do it the other way and you double-count the interaction between growth and re-rating. If an interviewer asks you to attribute returns and your three buckets don't sum to the change in equity value, you've hit that overlap.

Which bucket you're allowed to underwrite

This is the judgment question behind the arithmetic, and it's where candidates who've only done the math fall down.

In the deal above, $140 of the $660 came from multiple expansion — roughly 21% of value creation from the market simply paying more at exit than the sponsor paid at entry. No operating decision produced it. So a disciplined sponsor underwrites to a flat or lower exit multiple, and treats any expansion as upside rather than plan.

Strip it out. Hold the multiple at 8.0x: exit EV is $140 \times 8.0 =$ $1,120, exit equity is $820, MOIC falls to 2.7x and IRR to about 22%. Still a good deal. That's the test a real investment committee applies, and saying "I'd re-run it at a flat multiple to see if it still clears" is the answer that lands.

Common mistake

Two traps. First, candidates credit deleveraging with creating value out of nothing. Debt paydown converts enterprise value into equity value, it does not create enterprise value; the cash used to repay debt was cash the business generated, and that cash had value either way. It shows up as a return driver because the sponsor's equity claim grows, not because the company got more valuable. Second, people assume more leverage always means higher returns. Beyond a point, interest expense consumes the free cash flow that would have repaid principal, covenants tighten, and the equity gets wiped out in any downside case. Leverage amplifies outcomes in both directions.

Cash sweeps and the paydown path

Debt paydown isn't linear, and level 4 questions probe the mechanics. A cash sweep forces a set percentage of excess free cash flow to prepay debt, usually the most senior tranche first. Two consequences worth knowing:

Repayment accelerates as the company performs. More EBITDA means more excess cash means more sweep, so the paydown bucket is correlated with the EBITDA growth bucket rather than independent of it.
The sweep percentage often steps down as leverage falls, letting the sponsor retain more cash once the credit is safer.

Because senior debt is repaid first and carries the lowest coupon, the blended cost of debt rises over the hold as cheap paper amortizes away and expensive high-yield paper remains.

Where IRR and MOIC split

MOIC ignores time. IRR doesn't. Doubling money in three years is a 26% IRR; doubling it in seven is 10%. Same MOIC, very different deal.

The cleanest case is a dividend recap. Re-lever mid-hold and pay the sponsor a dividend, and IRR jumps because early cash dominates the calculation, while MOIC barely moves because total dollars returned are similar. Take the deal above and pay a $150 dividend in year 2 funded by new debt: the year-5 equity value drops by roughly that debt plus its accrued cost, so MOIC lands close to where it started, but IRR rises several points purely on timing.

That is why sponsors report both, and why a fund with a high IRR and a low MOIC has often been selling early rather than building.

Interview tip

When handed an LBO and asked what drove returns, say the three buckets with numbers, confirm they reconcile to the change in equity value, then volunteer the flat-multiple re-run unprompted. Naming which driver the sponsor controlled and which was the market is the part that sounds like someone who has sat in an investment committee rather than someone who has memorized a framework.

Glossary

New to the lingo? Every term used above, in plain English.

Multiple expansion: Selling a company at a higher valuation multiple than you paid for it. It is one of the ways a buyout can create value, alongside growing profits and paying down debt.
Exit multiple: A valuation shortcut for terminal value that applies a market multiple, such as EV/EBITDA, to the final forecast year to estimate what the business would sell for at the end.
Cash sweep: Using a company extra cash to pay down debt automatically each year. It is the engine of deleveraging in a leveraged buyout.
Private equity (PE): Firms that raise money to buy whole companies, improve them over several years, and sell them for a profit. They often use large amounts of borrowed money to do it.
Leverage ratio: How much debt a company carries relative to its earnings, usually measured as debt divided by EBITDA. Higher leverage means more risk and more required debt paydown.
Net debt: A company total debt minus its cash. It is what you subtract from enterprise value to get to equity value, since a buyer could use the cash to pay down the debt.
Senior debt: The safest, cheapest layer of borrowing, first in line to be repaid and usually secured by assets. It sits at the top of the capital structure.
High-yield bond: A bond from a company with a lower credit rating (below investment grade). It pays more interest to compensate lenders for the higher risk of default.

Frequently asked

How do you attribute LBO returns to their drivers?: Split the change in equity value into three buckets. EBITDA growth is the exit EBITDA less entry EBITDA, valued at the entry multiple. Multiple expansion is the change in multiple applied to exit EBITDA. Debt paydown is the reduction in net debt over the hold. The three should reconcile to the total change in equity value, and a sponsor will always claim credit for the first bucket.
Which return driver do sponsors actually control?: EBITDA growth and debt paydown. Multiple expansion depends on where the market is trading at exit, which nobody controls, so a disciplined sponsor underwrites to a flat or lower exit multiple. If a deal only clears the return hurdle because the multiple expands, the investment committee will treat that as a market bet rather than an operating plan.
Why can IRR and MOIC point in different directions?: MOIC ignores time and IRR does not. Doubling money in three years is a 26% IRR; doubling it in seven is 10%. So a deal with the higher MOIC can have the lower IRR if it takes longer. Sponsors are measured on both because IRR alone rewards selling early and MOIC alone rewards holding forever.
How does a dividend recap change returns?: It pulls cash forward. Re-levering the company to pay the sponsor a dividend mid-hold raises IRR substantially because early cash flows dominate the IRR calculation, while MOIC barely moves since total dollars returned are similar. It is the clearest case where the two metrics disagree by construction.

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