When an entrepreneur decides to sell their company, the due diligence of an SME is often perceived as a technical, almost notarial phase, required to reach closing without issues.
From the buyer’s perspective, however, due diligence is anything but a bureaucratic formality. It is the moment when the stated value of the business is tested against facts, in order to understand where risk sits, how manageable it is, and how it should affect price, deal structure, and final terms.

In particular, the buyer’s focus is on:

• where risk actually arises,
• how controllable that risk is,
• how it impacts the overall value of the transaction.

Due diligence is not just about the numbers

One of the most common misconceptions among entrepreneurs is to equate SME due diligence with a simple review of financial statements. In reality, financials are only the starting point of a broader assessment, aimed at understanding whether profitability is sustainable over time, what truly drives cash generation, and which factors could undermine value after the acquisition.

At this stage, the goal is not to validate the past, but to assess the transferability of the business model and its ability to hold up in the future.

Quality of earnings matters more than volume

During due diligence, one of the areas reviewed most carefully is the quality of EBITDA, rather than its absolute level. Earnings supported by structural drivers are valued very differently from more episodic or opportunistic results, because they tell a very different story about the company’s resilience.

In the first case, value is generated by:

• recurring customers,
• stable contractual relationships,
• structured and repeatable operating processes.

In the second case, results depend on:

• highly concentrated revenue,
• one off or extraordinary projects,
• direct and non replicable involvement of the founder.

This distinction is not a technical detail, but a strategic assessment that directly affects company valuation and the price recognised in a sale.

Dependence on the founder and management team

For SMEs, this is one of the most sensitive issues to emerge during due diligence. Buyers want to understand what would happen to the business if the entrepreneur reduced their operational involvement after the sale, and whether the organisation can truly stand on its own.

The key questions usually focus on:

• who actually makes day to day operational decisions,
• where relationships with key customers and suppliers reside,
• how much know how is documented and transferable.

A company that only works as long as the founder is present represents a structural risk. This rarely stops a transaction altogether, but it often results in earn outs, management retention commitments, or conditional pricing mechanisms.

Customers, concentration and revenue visibility

Revenue concentration is always a central point in SME due diligence, not so much because of the percentage itself, but because of the context behind it. A major customer can be either a risk or a strength, depending on the quality of the relationship.

The assessment typically depends on:

• the duration and stability of the commercial relationship,
• the presence of formal contracts,
• the level of operational integration between the parties.

Due diligence aims to determine whether that revenue is defensible over time. When the answer is uncertain, the perceived risk is almost always reflected in the sale price.

Contracts, clauses and legal risks in due diligence

Many critical issues do not emerge from the financial statements, but from contracts. During legal due diligence, buyers closely examine elements that may never have been questioned before.

In particular, they look at:

• change of control clauses,
• exclusivity arrangements,
• obligations not clearly reflected in the accounts,
• potential or ongoing disputes.

Often these are not severe issues in themselves, but when they surface late in the process they become negotiation levers that can affect the overall balance of the deal.

Tax matters and latent risk

From a tax perspective, buyers are not looking for aggressive optimisation strategies, but for latent risks that could materialise after closing. Attention therefore focuses on areas such as:

• potential tax assessments,
• interpretations that are not well established,
• long standing practices that have never been challenged.

These factors rarely derail a transaction, but they influence how risk is managed, typically through warranties or price adjustments. An unprepared tax risk is seldom overlooked during due diligence.

Why preparation changes the outcome of a sale

The difference between a due diligence that confirms value and one that erodes it almost always comes down to preparation. Entering this phase without having analysed the true dependencies of the business, its areas of fragility, and the most sensitive negotiation points effectively hands control of the narrative to the buyer.

Preparing for SME due diligence does not mean making the company perfect. It means understanding its weaknesses and deciding how to address them before they turn into negotiation tools.

Conclusion

Due diligence is not an exam to pass, but a comparison between two views of value. On one side is the entrepreneur’s perspective, shaped by years of building the business; on the other is the buyer’s perspective, focused on the company’s future sustainability. When this comparison takes place without surprises, the sale process progresses smoothly. When unprepared issues emerge, due diligence becomes a negotiating weapon against the seller, often when it is already too late to act.