Most business owners dread due diligence. They shouldn’t — at least, not for the reasons they think. The real risk isn’t what the buyer finds. It’s that you find it together, sitting across the table from someone who has already decided what that discovery is worth.
The Skeletons That Live in Every Business
There isn’t a company I’ve worked with that didn’t have them.
In Polish we call them trupy w szafie — literally “corpses in the wardrobe.” The image is deliberate. These aren’t small administrative oversights. They’re structural problems that have grown into the tissue of the business, invisible during normal operations but impossible to miss the moment someone starts asking the right questions.
I worked with a services firm a few years ago. Solid revenues in the tens of millions, a recognizable brand, loyal clients, a track record worth being proud of. The buyer was serious. The process was moving well. When due diligence began, we started working through the checklist point by point.
Somewhere around item ten, the owner stopped and said: “Wait.”
Three clients accounted for over 60% of revenue. None of them had contracts with any lock-in clause — they were informal arrangements built on relationship trust. The key operations director — the person without whom the business couldn’t function day-to-day — had no contract that would keep him through an ownership change. And the brand, built over more than a decade, had never been registered as a trademark.
None of this was hidden. The owner knew about all of it, the way you know your car makes a strange noise but don’t bring it to the mechanic because it hasn’t broken down yet. The problem was that he’d never been forced to see everything simultaneously, through the eyes of someone about to spend several million euros.
He paused the process. He came back two years later with a business in fundamentally different shape — and a valuation that reflected it.
Why Due Diligence Hurts Sellers More Than They Expect
The conventional framing positions due diligence as something the buyer does to the seller. The buyer brings lawyers, accountants, and operational consultants. They issue a DD request list running to hundreds of items. They populate a Virtual Data Room (VDR). They look for problems.
What sellers consistently underestimate is the economic mechanism that follows discovery.
Every issue a buyer’s team finds becomes a negotiating variable — immediately and automatically. This isn’t because buyers are adversarial (though some are). It’s because any undisclosed risk genuinely recalibrates their assessment of what they’re buying. A gap in IP ownership is a potential future liability. A key client without a formal contract is revenue concentration risk with no legal backstop. An undisclosed tax exposure is an escrow demand, a price reduction, or a reason to walk.
I’ve seen sellers walk into a process with an indicative offer from a Letter of Intent (LOI) at a strong valuation, only to watch the effective transaction price erode dramatically during due diligence — not because the business was misrepresented, but because the buyer found things that had never been surfaced, quantified, or addressed.
The owners weren’t dishonest. They were unprepared. The financial consequence can look identical.
What makes this especially frustrating is that the issues driving late-stage price reductions are rarely catastrophic on their own. They are ordinary, fixable business problems. The damage comes from timing: they surface at the worst possible moment, in front of someone with every incentive to use them.
What Buyers Actually Look For
Understanding what drives buyer concern helps sellers understand their own exposure. Most experienced acquirers — whether private equity funds, strategic buyers, or family offices — structure their early due diligence around four core areas.
Legal and Corporate Governance
The first sweep focuses on clean title to the assets being acquired: proper share registration, no undisclosed shareholders, required consents for the transaction, and verified ownership of everything the business depends on to operate.
Intellectual property is where this gets complicated. In Poland, as across Central and Eastern Europe, a significant number of software and technology businesses have IP ownership gaps that stem from early-stage development with freelancers on informal arrangements. The code exists in the system. The rights to that code are distributed across people who left years ago. This was never a problem while the business operated normally. It becomes acute the moment a sophisticated buyer asks to see the assignment agreements.
Outstanding litigation, regulatory issues, and off-balance-sheet commitments also receive early scrutiny — including items that haven’t formally escalated.
Financial Quality
Beyond reported numbers, buyers investigate quality of earnings — whether EBITDA reflects actual, sustainable performance or has been shaped by aggressive accounting, related-party arrangements, or one-off items that won’t recur.
Revenue recognition policies, the accuracy of management accounts relative to statutory financials, and the treatment of owner-related costs all get examined carefully. Working capital dynamics matter too: the age and collectibility of receivables, the terms offered to clients versus those received from suppliers, and whether the normalized working capital level assumed in the transaction price reflects reality.
For companies that have been through any tax audits, buyers want to understand the outcomes and any residual exposure. In Poland, the standard statute of limitations for tax matters is five years, which means historic liabilities can follow a business into new ownership.
People and Operational Dependencies
Owner dependency is one of the most common value-reducers in mid-market transactions — and one of the most preventable. If the business cannot operate without the founder’s direct involvement for a meaningful period, every institutional buyer will price that risk. The question is whether you give them the chance to see you addressing it, or whether you let them discover it and draw their own conclusions.
Beyond the owner, buyers examine the management layer’s depth and retention risk. Are key people on contracts? Do those contracts include provisions that survive an ownership change? Are there incentive structures that would keep critical employees motivated under new ownership, or does the buyer inherit a retention problem from day one?
Commercial Risk and Revenue Quality
Buyers look closely at revenue concentration: how much comes from the top three to five clients, whether those relationships are contractualized, what the historical retention rates have been, and whether forward-looking pipeline assumptions are grounded in reality.
The quality of client contracts matters too. Contracts with automatic renewal, long initial terms, and meaningful switching costs support a premium valuation. Month-to-month arrangements with no formal terms — regardless of how stable the relationships have historically been — introduce uncertainty that buyers discount.
Two Ways to Find Your Skeletons First
If due diligence is the mirror that reveals every flaw, the question for sellers is simple: do you see your reflection before the buyer does, or at the same time?
There are two practical routes.
Vendor Due Diligence (VDD)
Vendor Due Diligence is a full-scope DD process commissioned by the seller, completed before the buyer accesses the data room. The seller’s advisors run the same exercise the buyer would run, produce formal reports, and make those reports available to prospective acquirers as part of the sale process.
It costs more than the alternative. What it delivers is control over the narrative.
A problem you find yourself can be explained, contextualized, or remediated before it becomes a negotiating variable. It can be presented with a management response. A straightforward issue that would trigger a 10-15% price reduction in buyer-led DD can often be managed to a 2-3% adjustment — or eliminated entirely — when disclosed proactively with a clear explanation and a remediation plan.
VDD is standard in larger transactions and competitive auction processes where multiple bidders receive simultaneous access. For mid-market sellers — typically businesses with revenues between €5 million and €50 million — it remains underused. The upfront cost is real but the outcome differential is usually larger.
The Pre-Sale Business Audit
For sellers who aren’t ready to commission full VDD, or whose timeline doesn’t support it, a more accessible option exists: an external advisor working through a structured review using a question set modeled on what a serious buyer would ask.
This isn’t a certification. It’s a diagnostic — an honest answer to the question: what’s sitting here, and how long has it been here?
The value isn’t in the report. It’s in what happens next. Problems discovered with six to eighteen months before a process begins can be addressed on your schedule, at manageable cost, without any counterparty watching. The same problems discovered during buyer DD become urgent, expensive, and visible to someone with every incentive to use them.
The cost of a pre-sale audit is typically a fraction of a single percentage point of the eventual transaction value. The upside from issues surfaced and addressed proactively is often a multiple of that cost.
The Most Common Skeletons — and What They Cost
Based on sell-side M&A processes across Polish and Central European mid-market companies, these are the issues that surface most frequently and cause the most damage:
IP ownership gaps — particularly in technology businesses. Cost if discovered by buyer: typically 5-20% of transaction value in price reduction or escrow, depending on severity.
Key person dependency without retention mechanisms — no management contracts, no incentive structures for the post-closing period. Cost: direct price reduction to reflect risk, or expensive retention packages the seller is asked to fund.
Revenue concentration without contractual protection — top clients representing 40-60% of revenue with no long-term agreements. Cost: lower EBITDA multiples applied by the buyer to reflect churn risk.
Unregistered intellectual property — brand names, product trademarks, domain-adjacent marks. Cost: lower than hard IP gaps but creates ongoing uncertainty about post-closing defensibility.
Tax exposures from prior periods — often arising from aggressive treatment of owner-related costs or prior restructurings. Cost: escrow provisions, indemnities in the SPA, or direct price reduction.
Undisclosed contractual obligations — change-of-control clauses in supplier or client contracts, real estate agreements with unusual terms, financing arrangements with early repayment triggers. Cost: varies widely; can block or materially restructure the transaction.
None of these are exotic. All of them appear regularly. Most of them are fixable with adequate lead time.
What to Do Before You Start a Process
If you’re considering selling your business in the next one to three years, the most valuable work you can do today has nothing to do with choosing a banker or preparing a pitch deck. It has to do with looking honestly at what a buyer would find.
Start with a due diligence readiness review — either with an advisor or through a structured internal process. The question to answer for each area isn’t “does this exist?” but “would this hold up under scrutiny from a sophisticated buyer with access to all the documentation?”
Document everything you find. Prioritize by potential economic impact. Then make decisions: what can be remediated before a process, what needs to be disclosed and explained proactively, and what the likely buyer response would be if they find it themselves.
The goal isn’t a perfect business — no business is perfect, and experienced buyers know that. The goal is a business where the surprises are small and the responses are ready.
Sellers who go into due diligence having done this work don’t just negotiate from a stronger position. They navigate the entire process with less stress, fewer delays, and better outcomes across every dimension of the transaction.
The mirror is going to be held up either way. The only question is who holds it first.
Key Takeaways
- Most businesses carry undisclosed risks that only become visible during buyer-led due diligence
- Problems found by the buyer automatically become negotiating variables — problems found by the seller can be managed proactively
- Vendor Due Diligence (VDD) gives sellers control over the narrative at the cost of upfront investment
- A pre-sale business audit is a lower-cost alternative that surfaces issues with time to address them
- IP ownership, key person dependency, and revenue concentration are the most frequent value-reducers in mid-market M&A transactions
Łukasz Brzyski is a sell-side M&A advisor based in Kraków, Poland. He advises owners of mid-market companies through the full transaction lifecycle — from pre-sale preparation through closing. If you’re considering selling your business in the next two to three years, he offers a free 60-minute strategic conversation.