What Questions to Ask When Buying a Business: Tactical Diligence Scripts for Buyers

Pre-LOI questions screen for deal-breakers; diligence questions verify what was said. Once you sign the LOI and commit to exclusivity, your job changes. You’re no longer deciding whether to pursue the deal — you’re verifying that the deal you signed up for is the deal you’re actually getting. The questions are different, the techniques are different, and the conversations have higher stakes.

Diligence questions live in five settings: management meetings, customer calls, employee interviews, supplier conversations, and site visits. Each setting has different etiquette, different access constraints, and different signal value. Management meetings are scheduled and structured. Customer calls require seller approval and careful framing. Employee interviews depend on whether and when the seller has told the team. Site visits are often the most informative and the most underused.

The best diligence questions are open-ended. ‘Tell me about how you handle a customer escalation’ surfaces more than ‘do you have a customer escalation process?’ The closed-ended version gets a yes/no; the open-ended version gets a story, and the story is where the operational reality lives.

The follow-up question is where the truth lives. Sellers rehearse their answers to common questions. The first answer is often polished. The follow-up — ‘tell me more about that,’ ‘when did that happen,’ ‘what did you do?’ — reveals the messy reality. Disciplined buyers ask three follow-ups for every initial question.

“The best diligence questions are open-ended and follow-up driven. The seller’s first answer is rarely the whole answer. The follow-up is where the truth lives.”

Key Takeaways

• Diligence questions verify and probe; pre-LOI questions screen. The techniques are different and the settings are different.
• Open-ended questions outperform closed-ended ones. ‘Walk me through’ and ‘tell me about’ surface what binary questions miss.
• The follow-up is often more important than the original question. Sellers rehearse the first answer; the follow-up gets to the real story.
• Customer calls are the highest-signal diligence activity buyers under-use. What customers say differs from what management says.
• Employee interviews are sensitive but critical. They surface owner dependence, retention risk, and operational reality the seller won’t volunteer.
• Site visits beat conference rooms. Walking the floor with the operations manager surfaces issues that sit invisible in a data room.

Why diligence questions are different from pre-LOI questions

Pre-LOI questions are about screening; diligence questions are about verifying. Before LOI, you’re deciding whether the deal is worth pursuing. After LOI, you’re verifying that what you were told is true and uncovering what wasn’t volunteered. The two stages serve different purposes and have different tones.

Diligence questions go deeper because access goes deeper. After LOI, you typically get data room access, multiple management meetings, employee interviews (with seller permission), customer calls, and site visits. The questions follow the access — you can ask about specific contracts, specific employees, specific customer issues.

Time pressure changes the question style. Pre-LOI is exploratory and patient. Diligence has a 60-90-day clock. Questions need to be efficient, prioritized by importance, and structured to surface answers quickly. Buyers who waste the first 30 days on generalities run out of time for the questions that matter.

The stakes are higher. An unanswered pre-LOI question becomes an LOI red flag. An unanswered diligence question becomes a post-close lawsuit, a re-trade, or a busted deal. Diligence is the last chance to ask before money changes hands.

Setting 1: Management meetings (15 questions)

Management meetings are structured and scheduled. Typically 2-4 hours, with the CEO or owner and sometimes the CFO. The seller usually controls the agenda, but the buyer controls the questions. Come with a written list, take notes, and don’t accept wave-offs.

Open-ended questions outperform closed-ended ones. Instead of ‘is your AR aging clean?’ ask ‘walk me through your three oldest receivables and what’s going on with them.’ The first gets a yes; the second gets a story.

Save the hard questions for late in the meeting. After 2 hours of conversation, the seller is more relaxed and more likely to volunteer issues. Don’t lead with ‘tell me about that lawsuit.’ Build rapport first, then ask the harder questions when the conversation has momentum.

Sample script: asking about owner departure. ‘Once we close, what does your involvement look like for the first 6 months? The first year? The second year? What happens to the customer relationships you personally manage? Who’s being trained to take those over?’ This sequence forces specifics and reveals the actual transition plan.

Setting 2: Customer calls (10 questions)

Customer calls are the highest-signal diligence activity most buyers under-use. Sellers often resist customer calls until late in diligence. Don’t accept the resistance — insist on calls with the top 5-10 customers before close. What customers say often differs materially from what the seller says.

Calls are usually framed as ‘reference calls.’ The seller will frame the call as a buyer due-diligence exercise to check service quality. The customer is told the call is short (15-20 minutes) and confidential. You’re not asking customers to commit to anything — just to share their perspective.

Open with relationship questions, not contract questions. ‘How long have you worked with [Company]?’ ‘Who’s your main point of contact?’ ‘What do they do for you?’ Build the picture of the relationship before asking about renewal intent or competitor evaluation.

The killer question: ‘What would have to happen for you to leave?’ This question forces customers to articulate their switching threshold. If the answer is ‘nothing — we’re very happy,’ the relationship is sticky. If the answer is ‘a 10% price increase,’ the relationship is at risk. If the answer is ‘if [owner] left,’ you have an owner-dependence problem.

Setting 3: Employee interviews (10 questions)

Employee interviews are the most sensitive diligence activity. Until the seller tells the team, you can’t talk to employees. Once the seller does tell, you have a narrow window before employees start updating their resumes. Plan for both: schedule interviews fast once announced, and ask the right questions to surface flight risk.

Frame the interview as a ‘new owner introduction.’ Most employees fear job loss after a sale. The interview should be reassuring but probing. ‘I want to learn about what you do, what works, what doesn’t, and what you need to be successful under new ownership.’ Then ask the questions.

The most important question: ‘What does [owner] do that nobody else can do?’ Employees know the owner’s unique role better than the owner does. If the answer is ‘closes the big deals,’ you have a sales-dependence problem. If ‘handles the technical disasters,’ you have an expertise problem. If ‘nothing really,’ you have a transferable business.

Sample script: testing retention. ‘If everything stayed exactly the same except the owner, would you stay? What if [name a competitor] called you with a 15% raise? What would you want from a new owner that you’re not getting today?’ The answers reveal flight risk and what it would take to retain.

Setting 4: Site visits (8 questions)

Site visits are often the most informative diligence activity. Walking the production floor, the warehouse, the office, the field service yard surfaces issues that sit invisible in a data room. Equipment condition, housekeeping, employee body language, and operational flow are all visible — and not always consistent with what the data room suggests.

Walk with the operations manager, not the CEO. The CEO will give you the curated tour. The operations manager will tell you what’s actually broken, what’s breaking, and what hasn’t been replaced in 15 years. Schedule site visits with operational managers when possible.

The most useful site visit question is ‘show me, don’t tell me.’ ‘Show me the production floor.’ ‘Show me where you store finished goods.’ ‘Show me the customer service desk.’ ‘Show me your worst piece of equipment.’ These prompts force visibility into operational reality.

Look for the things people don’t volunteer. A locked door that doesn’t get opened during the tour. An area of the floor that’s skipped. An employee who avoids eye contact. A piece of equipment that’s clearly idle. Each of these is worth a question. ‘What’s in there?’ ‘What goes on over here?’ ‘Why is that machine off?’

Setting 5: Supplier conversations (5 questions)

Supplier conversations are the least-used and often the most revealing. Like customer calls, supplier conversations are usually scheduled near the end of diligence with seller approval. They reveal supply continuity risk, payment behavior, and competitive intelligence about the buyer’s industry.

Ask about payment behavior — it’s a leading indicator of cash issues. ‘How does [Company] pay? On terms? Late? Do you ever extend more than 30 days?’ A business that’s slow-paying its suppliers often has cash flow problems that don’t show up cleanly in P&L.

Ask about future supply. ‘What does our forward order book look like?’ ‘Are there any supply constraints we should know about?’ ‘Are you planning to raise prices?’ These questions surface supply and cost risk that the seller may have minimized.

Ask about competitive intelligence. ‘Who else in our industry do you supply?’ ‘How does [Company] compare to its competitors?’ ‘Are you aware of any consolidation in the industry?’ Suppliers see across multiple competitors and have unique perspective.

Sample dialogue: testing owner-dependence

Sample script — first question: ‘Walk me through how a major customer issue gets resolved today — like, a real customer escalation, not a theoretical one.’ (Open-ended; forces a story.)

Follow-up 1: ‘Tell me about the last time that actually happened. When was it? What was the issue?’ (Forces specificity; gets out of theoretical.)

Follow-up 2: ‘Who was involved on your team? What did you personally do? What did the team do without you?’ (Reveals owner’s actual role and team capability.)

Follow-up 3: ‘If you’d been on vacation that day, would the team have handled it as well? Worse? What would have been different?’ (Tests owner dependence directly.)

What you’ve learned after these four questions: Whether the owner is irreplaceable, whether the team can step up, whether the customer relationships travel with the owner, and whether the business runs without the seller. Four questions; far more signal than any data room export.

How to structure follow-up questions

The first answer is rehearsed; the follow-up gets the real story. Sellers prepare for common questions. The first answer is often polished, controlled, and limited. The follow-up — ‘tell me more,’ ‘when did that happen,’ ‘what did you do?’ — gets past the prepared answer to the actual experience.

Three follow-up techniques that work. (1) The specifier: ‘Give me a specific example.’ (2) The temporal: ‘When was the last time that happened?’ (3) The contrarian: ‘What if that didn’t work? What would you do then?’ Each technique surfaces different information.

Don’t let the seller change the subject. Sellers under pressure often pivot to a different topic, a generality, or a positive story. Bring them back: ‘Got it, but back to my question — can you give me a specific example?’ The pivot itself is information.

Take notes in real time. Notes prevent inconsistencies later. If the seller says one thing in meeting 1 and a different thing in meeting 3, you need the notes to catch it. Inconsistencies are usually meaningful — either the seller’s memory is unreliable, the answer is fabricated, or the situation is more complicated than the first answer suggested.

Conclusion

Diligence is where deals are verified or unraveled. The questions in this guide cover the five settings where diligence happens: management meetings, customer calls, employee interviews, site visits, and supplier conversations. Each setting has different scripts, different access, and different signal value. Open-ended questions outperform closed-ended ones; follow-ups outperform initial questions; specific examples outperform generalities. Customer calls and employee interviews are the highest-signal activities most buyers under-use. Site visits beat conference rooms. Supplier conversations are revealing and often skipped. Buyers who run disciplined diligence using the right questions in the right settings close cleaner deals, avoid post-close surprises, and re-trade only when the facts genuinely warrant it.

Frequently Asked Questions

What’s the difference between pre-LOI questions and diligence questions?

Pre-LOI questions screen for deal-breakers; diligence questions verify what was said and surface what wasn’t volunteered. Pre-LOI is exploratory and patient; diligence has a 60-90-day clock and goes deeper. Pre-LOI questions are answered by the seller; diligence questions are answered by the seller, customers, employees, suppliers, and the data room.

How do I structure a management meeting during diligence?

2-4 hours, written agenda shared in advance, focused on specific topics rather than overview. Save hard questions for the second half when rapport is built. Use open-ended questions (‘walk me through’) over closed-ended ones (‘is X true’). Bring follow-up questions and don’t accept wave-offs. Take notes in real time.

When should I do customer calls?

Late in diligence, after most other items are validated. Sellers usually resist customer calls until late, but they’re among the highest-signal diligence activities. Plan for 5-10 customer reference calls before close, scheduled with seller permission, framed as buyer due diligence. Top customers by revenue, plus 2-3 lost customers if available, give the most useful signal.

How do I get employee interviews?

After the seller tells the team about the sale — usually announced just before or at signing. Once announced, schedule 1:1 interviews with the top 5-10 employees fast. Frame as ‘new owner introduction’ with a probing component. Use a private location, not the seller’s office, and avoid having the seller present.

What’s the most important diligence question?

‘What does the owner do that nobody else can do?’ — asked of employees and customers separately. The answers reveal owner dependence, transferability, and post-close risk. If both employees and customers say ‘close the big deals’ or ‘hold the key relationships,’ you have an owner-dependence problem that affects price and structure.

How do I ask about negative things without offending the seller?

Frame negative questions as comparative: ‘Walk me through your worst customer experience this year’ instead of ‘tell me about your bad customers.’ Or normalize: ‘Every business has them — tell me about your three oldest receivables and what’s going on.’ The framing acknowledges that imperfections are normal and lowers the seller’s defensiveness.

What if the seller refuses customer calls?

Refusal is information. A seller who refuses customer calls often has customer concentration, customer dissatisfaction, or change-of-control risks they don’t want surfaced. Push back: ‘I need to confirm the relationships before close. We can frame the calls however you want, but they need to happen.’ If refusal continues, factor the risk into price or walk.

How long should diligence take?

60-90 days from LOI to close is typical for lower-middle-market deals. Faster is possible with motivated sellers and clean books; slower happens with regulated industries, complex carve-outs, or environmental issues. The questions in this guide should be asked across the full diligence period — week 1 management meeting, weeks 4-8 customer/employee calls, weeks 8-10 site visits and final follow-ups.

Should I record diligence meetings?

Almost never. Recording creates legal complications, makes sellers cagey, and discourages the candor that surfaces real information. Take detailed written notes instead. If you need a record, have two people in the meeting and reconcile notes afterward.

How do I handle inconsistencies between what the seller said and what employees/customers say?

Surface them respectfully but directly. ‘Your sales manager said X about customer concentration. You said Y. Help me understand.’ Inconsistencies are usually meaningful — either the seller’s perspective differs from the team’s reality, or one party isn’t fully informed. Both are signal worth investigating.

What questions surface owner dependence best?

Three: (1) what does the owner do that nobody else can do (asked of employees); (2) who’s your main point of contact (asked of customers); (3) walk me through how a major issue gets resolved today (asked of management with follow-ups about who was involved). The triangulation of all three answers reveals whether the owner is replaceable or critical.

Should I bring my advisor to diligence meetings?

For high-stakes meetings (management interviews, large customer calls), yes. An experienced advisor catches subtleties, asks better follow-ups, and signals seriousness to the seller. For routine document reviews, the advisor is optional. The marginal cost of advisor presence in critical meetings is small relative to the cost of missing information.

About the Author

Christoph Totter is the founder of CT Acquisitions, a buy-side deal origination firm headquartered in Sheridan, Wyoming. CT Acquisitions sources founder-led businesses for 75+ private equity firms, family offices, and search funds across the U.S. lower middle market ($1M–$25M EBITDA). Christoph writes about M&A from the perspective of someone on the phone with both sides of the deal table every week. Connect on LinkedIn · Get in touch