What Buyers Ask During Due Diligence

Google "due diligence checklist" and you'll find 50-item spreadsheets covering everything from environmental audits to intellectual property reviews. Most of those items never come up. We've watched hundreds of due diligence processes play out on Rejigg, and buyers consistently zero in on five to eight areas and go deep. Knowing where they'll dig saves you weeks of prep on documents nobody will read.

What Due Diligence Actually Looks Like

Due diligence is the period after a buyer signs a letter of intent (LOI) where they verify everything you've told them about the business. Think of it as the buyer doing their homework before writing the check.

In theory, it's a structured process with categories and checklists. In practice, it's a series of conversations. The buyer asks a question.

You provide a document or an explanation. They ask a follow-up. The cycle repeats until they're either satisfied or they find something that changes the deal.

Most buyers don't march through a 50-item list in order. They start with whatever keeps them up at night, which is almost always the financials, and then branch into the areas that look riskiest for your specific business. (For more on how buyers evaluate opportunities, see what business buyers actually care about.)

The Financial Deep Dive Comes First

Every buyer starts with the money. They want to understand exactly what the business earns, what it costs to run, and how stable those numbers are. This is the phase that takes the longest and generates the most follow-up questions.

Buyers typically request three years of profit and loss statements (P&Ls), tax returns, and bank statements. They're cross-referencing these documents against each other to make sure the numbers tell the same story. If your P&L shows $200K in monthly revenue but your bank deposits show $150K, you'll need to explain the gap.

They'll also ask about "add-backs," which are personal expenses you run through the business. Your gym membership, your spouse on payroll, your truck.

These are legitimate expenses that inflate the business's true cost structure. Buyers want to see them clearly broken out so they can calculate what the business would actually earn under new ownership. If you've already run your numbers through Rejigg's valuation calculator, you've done a lot of this work.

What strong answers look like: Clean books with add-backs clearly documented. If you use QuickBooks, Rejigg's integration can pull your financial data directly into your data room so buyers see organized, current numbers instead of emailed spreadsheets.

Customer Concentration: The Question That Scares Sellers Most

After financials, buyers almost always ask about your customer mix. Specifically: how much of your revenue comes from your top three to five customers?

This question makes sellers nervous because many small businesses do rely on a handful of big accounts. A plumbing company that gets 40% of revenue from one property management group. A marketing agency where one client represents a third of billings. Buyers will ask about this because they need to understand what happens if that relationship doesn't survive the ownership change.

Here's what matters: having concentration isn't automatically a dealbreaker. What buyers are really evaluating is whether those relationships are tied to the business or tied to you personally. If your biggest client has a three-year contract with the company and works with your team daily, that's different from a situation where they call your cell phone and only deal with you.

Prepare a simple breakdown showing revenue by customer (top 10 is usually enough), how long each relationship has been active, whether there's a contract in place, and who on your team manages the day-to-day relationship.

How Dependent Is the Business on You?

Owner dependence is the second question that makes sellers uncomfortable, because the honest answer is often "very." That's normal. You built this thing. Of course it depends on you.

Buyers know this. They're trying to figure out the degree. There's a spectrum between an owner who hasn't taken a vacation in seven years because the business would stall, and an owner who travels two months a year while the GM runs operations. Most businesses fall somewhere in the middle.

The questions you'll hear:

• What does your typical week look like?
• Which decisions can only you make?
• Who would run the business if you were out for a month?
• Do customers expect to deal with you personally?
• How long would a transition period take?

Be honest about this. If the business does depend heavily on you, acknowledge it and explain what a transition plan could look like. Buyers will build a transition period into the deal structure anyway, usually three to twelve months. Buyers get spooked when an owner can't see the dependence or won't talk about it openly.

Will Your Employees Stay?

Buyers think about this more than most sellers expect. Your team is a huge part of what they're buying, especially in service businesses where skilled labor is hard to find.

They'll want to know about your key employees: how long they've been with you, what they earn, whether they have employment agreements or non-competes, and frankly, whether they'll stick around after a sale. Buyers also ask about benefits, any pending HR issues, and overall turnover rates.

The trickiest part of this question is that most sellers haven't told their employees about the sale. Buyers understand that. They won't ask to interview your staff during early due diligence. But they will want to understand the team's structure and stability through documentation and your descriptions.

If you have a key employee who would leave if you sold, that's worth thinking about before you list. Sometimes the answer is bringing them into the conversation early. Sometimes it's structuring a retention bonus into the deal.

The Lease and Real Estate Question

For any business that operates from a physical location, the lease is a make-or-break document. Buyers need to know they can keep operating from your space after the sale closes.

The core questions: How much time is left on the lease? Is it assignable or transferable to a new owner? What's the monthly rent, and are there escalation clauses? Does the landlord have any approval rights over a new tenant?

If you own the building, buyers will ask whether you'd include the real estate in the deal or structure a separate lease. This changes the economics significantly and is worth thinking through before you get to due diligence.

Deals have fallen apart over leases. A buyer finds a great business, negotiates a price, gets through financial due diligence, and then discovers the lease expires in eight months and the landlord won't commit to a renewal. Get ahead of this by talking to your landlord early in the process, even before you list.

Legal and Regulatory Questions

This area varies a lot by industry, but buyers will always ask the basics: Are there any active or threatened lawsuits? Are all licenses and permits current and transferable? Are there any regulatory compliance issues?

For businesses in regulated industries (healthcare, food service, environmental services, financial services), expect deeper questions here. A home health agency buyer will want to see your state licenses, Medicare/Medicaid certifications, and any survey results or deficiency reports. A restaurant buyer will ask about health inspections and liquor licenses.

The key is having these documents organized and accessible. If a buyer asks about your contractor's license and it takes you two weeks to find it, that creates doubt about how well the business is managed overall.

What Checklists Include That Buyers Skip

Here's a useful exercise: look at any "due diligence checklist" online and notice how much of it never actually comes up in a small business sale.

Environmental assessments rarely happen unless the business involves manufacturing, chemicals, or industrial real estate. A SaaS company or a dental practice isn't getting a Phase I environmental report.

Intellectual property audits sound important, but for most small businesses (under $30M), the IP is the brand name, maybe a trademark, and some proprietary processes. Buyers ask about it, but it's usually a five-minute conversation, not a deep audit.

Detailed IT infrastructure reviews matter if you're buying a technology company. For a landscaping business or an HVAC company, the buyer cares whether you have decent scheduling software and whether your customer records are in a system they can access. That's about it.

The point is to spend your prep time on the things buyers will actually dig into: financials, customers, employees, operations, and the lease. Everything else you can address as it comes up.

How to Prepare Your Data Room

A data room is a secure place where you store all the documents a buyer will request during due diligence. Having one ready before you need it does two things: it speeds up the process, and it signals to buyers that you're organized and serious.

What to include from day one:

• Three years of P&L statements and tax returns
• Trailing twelve months of bank statements
• Customer revenue breakdown (top 10 customers with percentage of revenue)
• Employee roster with roles, tenure, and compensation
• Lease agreement (or property details if you own)
• List of major equipment with approximate age and condition
• Any active contracts (vendor agreements, customer contracts, service agreements)
• Licenses and permits

That's the core. You can add to it as buyers ask specific questions. Rejigg has a built-in data room that keeps everything organized and lets you control exactly which documents each buyer can see. No emailing spreadsheets back and forth, no shared Google Drive folders with unclear permissions.

How Long Does Due Diligence Take?

For most small business sales in the $1M to $10M range, due diligence takes 30 to 60 days. Larger or more complex deals can run 60 to 90 days.

The biggest factor in how long it takes is how quickly you can respond to requests. If a buyer asks for your customer concentration data and you have it in your data room already, that question is answered in minutes. If you need to export reports from three different systems and build a spreadsheet from scratch, that's a week.

Slow responses create a compounding problem. Every delay gives the buyer more time to second-guess the deal, explore other opportunities, or simply lose momentum. The sellers who close fastest are the ones who prepared their documents before due diligence started.

What Causes Deals to Stall During Due Diligence

Most deals that die during due diligence don't die because of what the buyer finds. They die because of how the seller handles what the buyer finds.

Undisclosed issues are the most common reason deals stall. If a buyer discovers something material that you didn't disclose, their trust evaporates. A pending lawsuit, a key employee who already gave notice, a customer who's leaving.

If you know about it, bring it up early. Buyers can handle problems. They can't handle feeling misled.

Slow or evasive responses erode confidence. When a buyer asks a simple question and gets a complicated non-answer or waits ten days for a response, they start wondering what else is being hidden. Even if the answer is "I don't have that data organized yet, give me a few days," that's better than silence.

Unrealistic add-backs blow up valuations. Buyers will verify every add-back you've claimed. If you said the business earns $800K in SDE (seller's discretionary earnings, meaning total owner benefit) but the add-backs don't hold up, the buyer's offer price just dropped. Be conservative and be honest about what's a true add-back versus a real business expense.

Failing to [value your business realistically](/articles/how-to-value-your-business-for-sale) creates a gap that due diligence only widens. If your asking price assumed perfect customer retention, no owner dependence, and aggressive growth, every finding during due diligence chips away at that number.

You Don't Need a Broker for This

Due diligence is the phase where sellers most often think they need a broker. All those document requests, all those questions. It can feel overwhelming.

But here's the thing: the person best positioned to answer questions about your business is you. A broker can't explain why your biggest customer has stayed with you for twelve years. A broker can't walk a buyer through your operations with the same credibility you can. And a broker is going to charge you 5 to 10% of the sale price for being a middleman in conversations you're perfectly capable of having yourself.

What you actually need is organization, not a broker. A clean data room, prepared financial documents, and a way to manage conversations with multiple buyers. That's exactly what Rejigg is built for.

Sellers list free. Buyers are vetted. Your data room is secure. And you keep every dollar that would have gone to a broker's commission.

Frequently Asked Questions

How long does due diligence take when selling a small business?

Due diligence typically takes 30 to 60 days for small business sales under $10M. The timeline depends heavily on how prepared the seller is. Having financial documents, customer data, and legal paperwork organized in a data room before due diligence starts can cut the process significantly shorter.

What financial documents do buyers request during due diligence?

Buyers request three years of P&L statements, tax returns, and recent bank statements at minimum. They cross-reference these to verify revenue and expenses. They also ask for a detailed list of owner add-backs so they can calculate the true earnings of the business under new ownership.

Can a deal fall apart during due diligence?

Yes. Deals most often fall apart due to undisclosed problems, unrealistic add-backs that don't hold up to scrutiny, or sellers who respond slowly to requests. Buyers can handle imperfect businesses. What kills trust is feeling surprised or misled about material facts during the verification process.

What is a data room and do I need one to sell my business?

A data room is a secure digital space where you store all the documents buyers will review during due diligence. You absolutely need one. It keeps sensitive documents organized, controls who sees what, and signals to buyers that you're a serious, prepared seller. Rejigg includes a built-in data room at no cost to sellers.

What do buyers care about most during due diligence?

Buyers focus on financial accuracy, customer concentration, owner dependence, employee retention, and lease terms. These five areas generate the vast majority of due diligence questions. Generic checklist items like environmental audits and IP reviews rarely come up in small business sales under $30M.