Every conversation about due diligence defaults to the buyer’s point of view.
Their checklist. Their auditors. Their Q&A process in the data room.
That framing is a mistake – and it costs sellers money.
The Misunderstood Phase of M&A
Due diligence (DD) is widely understood as the phase where a buyer validates what a seller has claimed. In practice, it is much more than that.
It is the single most important opportunity in the entire transaction to prove that the business is worth what the seller believes it is worth – and to defend that price under scrutiny.
Sellers who understand this generate better outcomes. Those who treat DD as something to get through, usually give something back at the table.
4 Reasons DD Works in the Seller’s Favour
1. The Buyer’s Indicative Offer Is Always Conditional
The number in a Letter of Intent (LOI) or Non-Binding Offer (NBO) is not a commitment. It is a price subject to confirmation through due diligence.
A seller who enters the DD phase fully prepared – with clean financials, documented processes, and no unresolved liabilities – gives the buyer no basis to re-trade. The price holds.
A seller who is not prepared creates exactly the uncertainty that buyers use to justify a reduction.
2. Every Surprise in DD Reduces the Price – Disproportionately
This is one of the most underappreciated dynamics in M&A transactions.
When a buyer finds an unexpected issue during DD – an undisclosed liability, a customer contract with a change-of-control clause, an unregistered IP asset – the price impact is rarely proportional to the actual financial exposure.
The buyer is not discounting the problem. They are discounting the uncertainty.
A single unexplained item worth 200,000 PLN can trigger a price reduction of 1-2 million PLN. Not because of the item itself, but because of what it implies: what else might be hiding?
Preparation eliminates that uncertainty before it becomes a negotiation problem.
3. Readiness Signals Management Quality
This is a subtler point, but experienced buyers and their advisors pick it up immediately.
A company that enters the data room with audited financial statements, an up-to-date corporate register, signed and unexpired customer agreements, and documented operational processes sends a clear message: this business is professionally run.
That perception has a price. Buyers apply lower risk premiums to well-organised businesses. That difference shows up in the valuation.
Conversely, a data room that requires constant chasing, has gaps in key documents, or reveals inconsistencies between stated and actual performance raises questions that go beyond the individual issues found.
4. Vendor Due Diligence Is an Investment, Not a Cost
Vendor Due Diligence (VDD) – a DD process commissioned by the seller before going to market – is still underused in the Polish mid-market.
The typical cost ranges from 80,000 to 150,000 PLN depending on scope and advisors involved. The typical benefit is threefold:
- Issues are identified and resolved before buyers see them
- The process is faster because buyers can rely on existing reports
- The seller enters negotiations with a defensible, independently verified position
The return on a well-executed VDD is rarely difficult to calculate in hindsight.
The Framing That Changes Everything
A seller who approaches DD as an exam to be passed will prepare defensively. They will answer questions, provide documents when asked, and hope nothing damaging surfaces.
A seller who approaches DD as a management presentation will prepare offensively. They will anticipate questions, organise materials proactively, and use the process to reinforce – rather than merely defend – the investment case.
The difference in outcome is not marginal.
What This Means in Practice
If you are considering a sale in the next 12 to 24 months, the most impactful thing you can do now is to look at your business the way a buyer’s DD team will.
- Are your last three years of financial statements audited and consistent?
- Are your key customer contracts signed, current, and free of problematic clauses?
- Is your corporate structure clean, documented, and free of undisclosed obligations?
- Can your business operate and be explained independently of you as the owner?
These are not DD questions. They are questions about the quality of your business. DD simply makes the answers visible.
Final Thought
The sellers who get the best outcomes in M&A transactions are not necessarily the ones with the best businesses.
They are the ones who present their business most clearly, most completely, and with the least room for doubt.
Due diligence is where that clarity either holds or falls apart.
Lukasz Brzyski is a sell-side M&A advisor, based in Krakow. Poland. He works with Polish mid-market business owners on the full transaction lifecycle – from preparation through closing.
If you are thinking about a sale in the next two to three years, the first conversation is free. Contact here.