Due diligence: how to prepare your SME for the buyer's scrutiny

You have found a serious buyer for your business. The initial discussions went well and a letter of intent has been signed. What next? Now comes one of the stages sellers dread most: due diligence. This in-depth audit conducted by the buyer can last several weeks, involve a team of experts and lay bare every aspect of your SME.

Yet too many business owners in French-speaking Switzerland approach this phase reactively, even anxiously. They endure the buyer's requests instead of anticipating them. The result: timelines that stretch out, negotiations that turn sour and, sometimes, transactions that collapse just weeks before signing.

The good news? Well-prepared due diligence is a major strategic advantage. It lets you control the pace of the sale, reassure the buyer and defend your valuation. Here is how to turn this dreaded exercise into a negotiating lever.

What is due diligence in the context of an SME sale?

Due diligence — sometimes referred to as an acquisition audit or pre-acquisition review — is the full set of checks a buyer carries out before completing the purchase of a business. Its purpose is simple: to confirm that what they saw and heard during the initial discussions matches reality.

For SMEs in French-speaking Switzerland, this stage generally takes place after the signing of a letter of intent (LOI) and before the final sale agreement is drafted. It may be conducted in-house by the buyer or entrusted to external experts: fiduciary firms, lawyers and consultants specialising in business transfers.

The main areas of due diligence

A thorough acquisition audit generally covers four broad dimensions:

• Financial due diligence: analysis of the accounts, cash position, debts, true profitability and available cash flows.
• Legal due diligence: review of contracts, articles of association, ongoing disputes, intellectual property and commercial leases.
• HR and employment due diligence: team structure, employment contracts, collective agreements and risks linked to key departures.
• Operational and commercial due diligence: customer portfolio, supplier contracts, production tools and critical dependencies.

Depending on the size and sector of your business, further dimensions may be added: tax, environmental, IT or regulatory due diligence.

Why anticipating is a winning strategy for the seller

A seller who arrives at due diligence unprepared sends a strong signal to the buyer: a lack of rigour or, worse, an intention to conceal information. Conversely, an owner-manager who presents an orderly data room, clear answers and up-to-date documents inspires trust and credibility.

That trust has a direct impact on the transaction. A reassured buyer is less inclined to push the price down, demand excessive warranties or drag out negotiations. They can move towards signing within a reasonable timeframe.

In French-speaking Switzerland, where SME transactions often involve private buyers, MBOs (Management Buy-Outs) or regional strategic acquirers, the quality of the human relationship matters enormously. Smooth due diligence strengthens that relationship.

The 6 steps to prepare your SME for due diligence

1. Run your own due diligence in advance

Even before making contact with potential buyers, take a critical look around your business. Ask yourself the question the buyer will ask: "If I were buying this business, what would worry me?"

This proactive approach will help you identify sensitive areas and correct them before they become obstacles to the sale. A business transfer adviser can support you in this exercise to guarantee an objective view.

2. Build a structured data room

The data room is the space — almost always virtual these days — where you gather all the documents you will make available to the buyer. Its quality is often the first indicator a buyer uses to gauge how serious the seller is.

Here are the essential documents to gather:

• The last three to five sets of annual accounts (balance sheet, income statement, notes)
• Tax returns for the most recent financial years
• Up-to-date articles of association and share register
• Significant customer and supplier contracts
• Employment contracts, payslips and internal regulations
• Lease agreements (commercial premises, equipment)
• Current insurance policies and liability cover
• Intellectual property (trademarks, patents, software)
• Minutes of the governing bodies for the last three years
• Any ongoing or past disputes

Organise these documents by theme, name the files clearly and make sure everything is up to date. A missing or illegible document breeds distrust.

3. Identify and document your sensitive points

Every business has areas of fragility. A customer accounting for 40% of revenue, a supplier contract expiring in six months, a key employee whose departure would be critical... These elements should not be hidden, but explained and put into context.

For each sensitive point, prepare a clear explanatory note: what is the actual situation, what are the objective risks, and what measures have been taken or are planned to mitigate them? This proactive transparency is seen as a sign of maturity and honesty.

4. Clean up your accounts before going to market

The accounts of a family-owned SME often contain items that blur the picture of true profitability: owner remuneration above or below market rates, personal expenses run through the business, exceptional investments, rents between related parties...

Ideally, normalise your accounts together with your fiduciary to bring out your company's normalised EBITDA, in other words the true profitability a buyer could expect. This accounting normalisation work is essential to defend your valuation.

5. Regularise any pending contractual situations

A verbal agreement with a major customer, an unrecorded salary amendment, a lease whose renewal was never confirmed in writing... These loose ends, common in SMEs, become obstacles during due diligence.

Before entering a sale process, take the time to formalise in writing your important commercial and employment relationships. This reduces the risks the buyer will identify and also protects your interests when negotiating warranties and indemnities.

6. Prepare your management team to answer questions

Due diligence is not limited to documents. Serious buyers will want to meet key staff and ask direct questions about strategy, risks and company culture. Prepare your teams for these exchanges: they need to be informed of the ongoing process (within the limits of confidentiality) and able to answer consistently.

Contradictory answers between the seller and their managers can be enough to make a buyer doubt the reliability of the information provided.

Common mistakes to avoid during due diligence

In our experience advising on SME transfers in French-speaking Switzerland, certain mistakes come up regularly among sellers:

• Providing incomplete or contradictory documents, which fuel distrust rather than confidence.
• Trying to hide negative points, which will be discovered anyway and will seriously damage the seller's credibility.
• Responding to requests as they come in, without any organisation, which needlessly extends timelines.
• Neglecting the human dimension: a buyer who does not feel properly welcomed and informed may walk away even if the numbers are good.
• Confusing speed with haste: trying to move fast by sending unverified documents creates more problems than it solves.

The role of a business transfer adviser in preparing for due diligence

Working with an adviser specialising in SME sales radically changes the nature of the experience. This professional knows the questions buyers ask, the points auditors watch for and the expectations of the fiduciaries appointed by the buyer.

They can help you to:

• Carry out a sale-readiness diagnostic before putting the business on the market
• Build and organise your data room professionally
• Identify and address sensitive points in advance
• Coordinate exchanges with the buyer's advisers
• Defend your valuation against post-due diligence price adjustments

In French-speaking Switzerland, where the economic fabric is dense and personal networks matter, calling on an intermediary recognised in the business transfer market can also ease contact with qualified buyers and speed up the whole process.

Conclusion: make due diligence an asset, not an ordeal

Due diligence is not a threat to a well-prepared seller. On the contrary, it is an opportunity to demonstrate the strength of what they have built, reassure the buyer and complete the transaction on the best possible terms.

By anticipating questions, organising your documents, addressing sensitive points transparently and surrounding yourself with the right advisers, you regain control of a stage that many sellers wrongly dread.

Selling your business is the culmination of years of work. It deserves preparation to match what is at stake. The earlier you start preparing — ideally 12 to 24 months before the planned transaction — the more you maximise your chances of closing at the price and on the terms you deserve.