Most consulting candidates treat LBO interview questions as a vocabulary quiz. The interviewer is not grading your glossary; they are listening for whether you can show that debt only amplifies equity returns when cash flow can carry it, and that today's buyout math leans on operating improvement far more than financial engineering.
That is the thesis of this piece. Bain's Global Private Equity research now frames a typical five-year path to a 2.5x MOIC (about 20 percent IRR) as requiring roughly 10 to 12 percent annual EBITDA growth, not the ~5 percent that worked in the 2010s. After you finish, you should be able to answer the four questions that actually clear a PE or diligence-case screen: sources and uses, why leverage lifts equity returns, what drives IRR, and a clean paper LBO.
This is written for the consulting candidate who is cross-applying to private equity or who meets LBO logic inside a due-diligence case. The sibling guide LBO model explained covers spreadsheet build order; this one stays on questions and answers.
What the interviewer is scoring
In a first PE interview or a consulting diligence case, I stop listening when the candidate lists "debt paydown, EBITDA growth, multiple expansion" and then cannot put numbers on any of them. The sheet rewards three behaviors:
| Signal | Weak answer | Strong answer |
|---|---|---|
| Capital structure | "They use a lot of debt" | Names sources vs uses and the equity plug |
| Leverage logic | "Debt is cheaper / tax deductible" | Shows equity check shrinks, so the same EV gain hits a smaller base |
| Returns | Quotes IRR without MOIC or hold period | Separates cash-on-cash from annualized return and names the fragile driver |
Debt markets still matter for context. Bain's 2025 Global Private Equity Report put 2024 US buyout debt ratios at about 4.9x EBITDA, still well below pre-pandemic levels. That is not a number you must memorize for an interview; it is why "borrow as much as possible" is a weaker answer than "size debt to cash-flow coverage."
Sources and uses: force the table to balance
"Walk me through sources and uses" is the most common opening LBO interview question for a reason. It proves you know cash has to come from somewhere and go somewhere, to the dollar.
Uses are what the deal spends: equity purchase price (or enterprise value if you are buying the whole firm and refinancing), refinance of existing debt, transaction and financing fees, and any cash left on the balance sheet you choose to keep or sweep. Sources are how you fund it: new debt tranches, sponsor equity, rollover equity from sellers or management, and sometimes cash on the target's balance sheet. Sponsor equity is the plug: Total uses minus all other sources.
A real public-to-private filing makes the shape concrete. When Electronic Arts announced its take-private by a consortium of PIF, Silver Lake, and Affinity Partners, the company's September 2025 release and the related SEC exhibit disclosed an enterprise value of about $55 billion, funded with roughly $36 billion of equity (including PIF rolling its existing stake) and $20 billion of committed debt, of which $18 billion was expected to fund at close. Bain later cited the deal as a record buyout in its 2026 Global PE Report press release. You will not rebuild EA on a whiteboard; you will rebuild a miniature version of that balance.
Here is an interview-scale table for a fictional industrial coatings maker, HarborCoat, with $80 million of LTM EBITDA bought at 9.0x:
| Sources | $m | Uses | $m |
|---|---|---|---|
| Senior term loan (4.5x EBITDA) | 360 | Equity purchase price (EV − net debt) | 620 |
| Subordinated / mezz | 80 | Refinance existing debt | 100 |
| Sponsor equity (plug) | 300 | Fees and expenses | 20 |
| Total | 740 | Total | 740 |
Entry enterprise value is $720 million (80 × 9). Assume $100 million of existing net debt is refinanced and $20 million of fees, so uses land at $740 million. Debt of $440 million leaves a $300 million equity check. If sources do not equal uses, stop talking and fix the arithmetic before you discuss returns.
Why leverage lifts equity returns
The tax deductibility of interest is true and secondary. The interview answer is mechanical: leverage shrinks the equity check, so any increase in equity value at exit is measured against a smaller base.
Same HarborCoat business, same entry EV of $720 million, same exit. Hold all-equity vs 61 percent debt side by side for five years. Assume EBITDA grows to $120 million, exit at 9.0x (no multiple expansion), and free cash flow pays down $180 million of debt in the leveraged case:
| All-equity buy | Levered buy | |
|---|---|---|
| Entry equity check | $720m | $300m |
| Exit EV (120 × 9) | $1,080m | $1,080m |
| Exit net debt | $0 | $260m |
| Exit equity | $1,080m | $820m |
| MOIC | 1.5x | 2.7x |
| Approx. 5-year IRR | ~8% | ~22% |
Nothing magical happened to the factory. The same $360 million of enterprise-value growth (and, in the levered case, $180 million of debt paydown) lands on a $300 million equity check instead of a $720 million one. The cost of that amplification is fixed interest and covenant risk: if EBITDA falls and cash cannot service debt, equity is wiped first.
Ned's rule. If you cannot explain leverage with one all-equity column and one levered column that share the same exit EV, you do not yet understand the deal. Adjectives about "cheap debt" are optional; the table is not.
What actually drives IRR
Name the three drivers, then rank them for the interviewer:
- EBITDA growth (organic or via add-ons): raises exit EV at any given multiple.
- Debt paydown: free cash flow reduces net debt, so more of exit EV belongs to equity.
- Multiple expansion: exit multiple above entry. Useful when it happens; unreliable as a thesis.
Bain's framing is the clean way to sound current without inventing statistics. In the 2026 Global PE Report press release, Bain notes that a typical 2010s deal needed about 5 percent annual EBITDA growth to clear a 2.5x MOIC over five years (~20 percent IRR), aided by multiple expansion and cheap leverage. With borrowing costs in the 8 to 9 percent range, leverage often closer to 30 to 40 percent of capital structure, and purchase multiples elevated, Bain's rule of thumb is that the same 2.5x now needs roughly 10 to 12 percent annual EBITDA growth: "12 is the new 5."
MOIC and IRR are not synonyms. MOIC is exit equity divided by entry equity (cash-on-cash, no clock). IRR annualizes that multiple over the hold. Rough five-year anchors interviewers expect you to know cold:
| MOIC at year 5 | Approx. IRR |
|---|---|
| 2.0x | ~15% |
| 2.5x | ~20% |
| 3.0x | ~25% |
A shorter hold raises IRR for the same MOIC; a longer hold lowers it. That is why "we exited early into a strategic bid" shows up in PE stories even when the absolute dollar profit is unchanged.
Paper LBO: HarborCoat in eight minutes
A paper LBO is the same story without Excel: entry, sources and uses, simple cash generation, debt paydown, exit equity, MOIC, IRR. Invented numbers below; redo them on paper.
Prompt. HarborCoat: $80m LTM EBITDA. Buy at 9.0x. Fund with 5.5x total debt at 8 percent cash interest, no mandatory amortization beyond a full cash sweep of free cash flow. EBITDA grows 8 percent a year. Annual free cash flow available for debt paydown equals EBITDA − interest − 30 percent tax on EBIT − $15m maintenance capex (ignore D&A and WC for speed). Exit at 9.0x after five years. What are MOIC and IRR?
Step 1 — Entry. EV = 80 × 9 = $720m. Debt = 80 × 5.5 = $440m. Equity = $280m (ignore fees for the paper version).
Step 2 — Year-5 EBITDA. 80 × (1.08)^5 ≈ 80 × 1.47 ≈ $118m. Round to $118m.
Step 3 — Rough annual FCF. Year-1 interest ≈ 440 × 0.08 = $35m. Approximate average interest over the hold at ~$30m as debt declines. EBIT ≈ EBITDA for this paper case. Tax ≈ 0.3 × (118 − 30) mid-case is messy; use a constant $25m interest and $28m tax and $15m capex → FCF ≈ 118 − 25 − 28 − 15 = $50m in the exit year, and average ~$42m over five years. Cumulative paydown ≈ 5 × 42 = $210m.
Step 4 — Exit. Exit EV = 118 × 9 ≈ $1,062m. Exit debt = 440 − 210 = $230m. Exit equity = 1,062 − 230 = $832m.
Step 5 — Returns. MOIC = 832 / 280 ≈ 3.0x. Five-year IRR on 3.0x ≈ 25 percent.
Say the numbers out loud as you write them. If you lose a year of compounding, correct mid-sentence; interviewers care more about the path than a perfect root.
How consulting diligence cases steal the same questions
In an MBB-style commercial diligence case, nobody asks you to size Term Loan B. They still ask LBO questions in disguise: "Would a financial buyer pay 11x for this?" translates to "Does cash flow support enough leverage that equity clears a 20 percent IRR without multiple expansion?" Answer with coverage and growth, not with a multiple you saw on a blog.
If the case company is cyclical or capex-heavy, say so before you invent a 6x debt structure. Stable subscription-like cash flow supports more leverage; a project-based industrial business does not. That judgment is half the interview.
Drill the math until it is automatic
Run one HarborCoat-style paper LBO on paper today, then stress the three drivers: cut EBITDA growth to 4 percent, drop the exit multiple by one turn, and remove the cash sweep. Note which shock hurts IRR most. For consulting-side reps that keep your quantitative habits sharp before a PE screen, use CoachNed's quick math drill (free forever) or start a timed case at /start. Everything on the platform is open for seven days with no card; then $120 for a recruiting season or $49 a month.
Frequently asked questions
What LBO interview questions come up most often?
Sources and uses, why use debt instead of all equity, the three return drivers, IRR vs MOIC, and a short paper LBO. Ideal / poor LBO candidates and cash-sweep mechanics are common follow-ups once the math is clean.
Do I need exact debt multiples for PE interviews?
No. Know that leverage is sized off EBITDA and coverage, that senior debt sits above junior debt and equity in priority, and that recent buyout debt ratios have sat well below the pre-pandemic peak (Bain cited about 4.9x EBITDA for 2024). Inventing "always 70 percent debt" is worse than saying "it depends on cash-flow stability."
How is a paper LBO different from a full LBO model?
A paper LBO is a pen-and-paper estimate under time pressure. A full model adds monthly or annual debt schedules, covenants, PIK toggles, working capital, and scenarios. Same economic story; different precision. Build order lives in LBO model explained.
What if the exit multiple is lower than entry?
Multiple contraction hurts returns. A credible base case often assumes flat or slightly lower exit multiples so the underwriting rests on EBITDA growth and deleveraging, not a friendlier market at sale.
Should consulting candidates memorize a banker's worked example?
Memorize the method, not someone else's dollar figures. Interviewers change the prompt. If you can rebuild HarborCoat from a blank page in eight minutes, you are ready; if you can only recite a $100 million / 10x script, you are not.
Sources
- Private Equity Outlook 2025 (Bain Global PE Report) — 2024 buyout debt ratios (~4.9x EBITDA) and buyout leverage context. Checked 2026-09-24.
- Bain Global PE Report 2026 press release — "12 is the new 5," 2.5x MOIC / ~20% IRR benchmark, EA deal size, leverage and rate environment. Checked 2026-09-24.
- EA announces agreement to be acquired — ~$55bn EV, ~$36bn equity, $20bn debt commitment for the public-to-private. Checked 2026-09-24.
- EA SEC Exhibit 99.1 (deal announcement) — primary filing text matching the financing split. Checked 2026-09-24.
CoachNed is not affiliated with Bain & Company, Silver Lake, or any firm named above.