Growth Equity vs. Buyout PE: How the Technical Questions Diverge

Both are private equity and both get scored on returns. But the returns come from different places, so the interviewer is listening for different things, and a great buyout answer can sound wrong in a growth equity room.

A buyout fund usually buys control of a mature company, funds a big part of the price with debt, and makes money by growing cash flow and paying that debt down. A growth equity fund usually buys a minority stake in a company that's already working but still growing fast, uses little or no debt, and makes money almost entirely because the company gets a lot bigger.

That one difference changes the interview more than people expect. The vocabulary overlaps (IRR, MOIC, entry and exit multiples), so candidates assume one round of LBO prep covers both. It covers maybe half.

Start with where the returns come from

Every PE return can be broken into the same few pieces. The business earns more by the exit. The multiple you sell at is higher or lower than the one you paid. And in a levered deal, debt gets paid down, so more of the enterprise value belongs to equity at the end.

In a buyout, all three show up, and the debt piece is often doing a lot of the work. In growth equity, the debt piece is close to zero and the earnings piece is mostly revenue growth. Interviewers on each side ask questions that probe the piece their returns depend on. If you can explain that in two sentences at the start of an answer, you've already shown you know which kind of fund you're talking to.

A buyout, worked through

A company does $50 million of EBITDA. The fund buys it for 10x, so $500 million of enterprise value, and funds it with $300 million of debt and $200 million of equity. Ignore fees to keep the numbers clean.

Over five years EBITDA grows to $70 million, and the company uses its free cash flow to pay the debt down to $150 million. The fund sells at the same 10x. Exit enterprise value is $700 million. Subtract the $150 million of remaining debt and equity is worth $550 million.

That's $550 million back on $200 million in, a 2.75x MOIC, which works out to an IRR of roughly 22% over five years. Now run the same business with no debt at all. You pay $500 million and get $700 million back. That's 1.4x. Same company, same growth, same multiple. The gap between 1.4x and 2.75x is the leverage and the paydown.

So buyout interviewers spend their time on whether that debt is safe and whether the cash flow is real enough to pay it off.

A growth equity deal, worked through

A software company does $50 million of revenue and is growing fast. The fund invests $50 million of new money at a $250 million post-money valuation, which buys 20% of the company. That's 5x revenue. There's no debt on either side of this.

Over five years revenue triples to $150 million. The company is sold at 4x revenue, so $600 million. Assume no further dilution, and the fund's 20% is worth $120 million. That's 2.4x on $50 million, an IRR of about 19%.

Notice what happened to the multiple. It went down, from 5x to 4x, and the deal still worked, because revenue tripled. That's the normal shape of a growth deal. Fast growers often get a lower multiple as they mature and slow down, so the plan has to work even when the multiple compresses. Growth interviewers want to hear you say that out loud.

The part buyout candidates forget: the security

Growth investors usually buy preferred stock, not common, and the most important term is the liquidation preference. With a standard 1x non-participating preference, the fund gets the greater of its money back or its ownership share of the sale proceeds.

Run the same deal where things go badly and the company sells for $200 million. Twenty percent of that is $40 million, less than the $50 million invested. With the preference, the fund takes its $50 million instead. That's how a minority investor with no debt and no control still gets some downside protection, and it's why a growth interviewer might ask you what happens to their return in the bad case before they ask anything else.

If cap table mechanics are rusty, the post on how to read a cap table like an investor walks through preferences, fully diluted ownership, and the option pool.

What buyout interviewers tend to ask

• Walk me through a paper LBO. Expect to do the math above in your head, with round numbers, in a few minutes.
• How much debt can this business support? The answer runs through EBITDA stability, capex needs, and how much free cash flow is left after interest.
• What makes a good LBO candidate? Steady cash flow, low capex needs, a defensible market position, and room to cut costs or improve margins are the usual answers. Say why each one matters for paying down debt.
• Build sources and uses for this deal. Both sides have to balance, and fees and existing debt refinancing are the line items people leave out.
• What happens to returns if we exit a year later? Usually MOIC goes up a bit and IRR goes down, because the extra year of cash flow is worth less than the time it costs.
• What would make you walk away? Cyclical revenue that can't carry fixed interest payments is the classic answer.

What growth equity interviewers tend to ask

• What's driving the growth, and how long can it last? They want new customers, expansion from existing ones, and pricing pulled apart, not one blended growth rate.
• What's net revenue retention and why does it matter? It's this year's revenue from customers you had a year ago, divided by what those same customers paid a year ago. Above 100% means existing customers are growing faster than you lose them.
• How do you think about customer acquisition cost and payback? Payback is how many months of gross profit from a new customer it takes to earn back what you spent to win them. Shorter is better.
• What is the Rule of 40? Revenue growth rate plus profit margin (people use EBITDA or free cash flow margin). It's a rough way to judge whether a company is trading off growth and profitability sensibly.
• This company burns cash. How long is the runway, and does this round get it to profitability?
• We'd own 20% with no board control. How do we protect ourselves? Liquidation preference, a board seat if you can get one, and protective provisions that give you a vote on things like new senior debt or a sale.
• What does the market have to look like for this to be a big outcome? Expect to size the market roughly and defend it.

The case study looks different too

A buyout modeling test is usually an LBO: an operating model, a debt schedule with a couple of tranches, cash sweep, and a returns table. The tricky parts are mechanical, like interest calculated on the average debt balance creating a circular reference.

A growth equity case is often lighter on the model and heavier on judgment. You might get customer cohort data and be asked what it says about retention, or a revenue build by number of customers and price, with a simple exit at a revenue multiple. Then you write or present a recommendation. The model is there to support a view on the business, and the interviewer will push on that view harder than on your formulas.

Answers that give away the wrong prep

• Reaching for leverage as a value driver in a growth equity interview. Most growth deals have little or no debt, so it reads like you memorized an LBO answer.
• Calling a company cheap because its revenue multiple is lower than a peer's. A slower-growing or lower-margin business deserves a lower multiple. Say what you're getting for the price.
• Ignoring dilution. A growth company that needs another round before exit will shrink your 20%, and your return math has to account for it.
• Treating growth equity like venture. Growth investors usually want a proven product and real revenue, with the risk centered on how big it gets, not whether it works at all.
• In a buyout interview, talking only about revenue growth and never about cash. The debt gets paid from free cash flow, not from the top line.
• Assuming the exit multiple goes up. In either kind of deal, a plan that only works with multiple expansion is a weak plan.

Common questions

For the buyout half of this, the post on common LBO interview mistakes covers where paper LBO answers usually go wrong, and IRR, MOIC, and payback period explains why the two return numbers above don't always move together.