Hidden risks in M&A – why human capital has become critical

Mergers and acquisitions have always carried uncertainty, but the playing field has become noticeably tougher. Higher interest rates are squeezing financing and making every deal more expensive to carry. At the same time, weaker economic indicators make future revenues harder to assess. Therefore, every wrong assumption is significantly more costly than it was during years of low interest rates.

In such a climate, it is no longer enough to simply scrutinize balance sheets, tax issues, and contracts. That level of control shows what the company has done so far. However, it reveals less about what the organization can actually achieve after the takeover. It is precisely here that many risks hide, which later affect price, pace, coordination, and profitability.

Leadership, culture, and tacit knowledge can determine whether an acquisition gains momentum or loses speed. If key personnel leave, or if two working methods clash, value can be eroded rapidly. This is particularly true for knowledge-intensive companies where much of the competence resides in people rather than in machinery. Therefore, human capital has become a central part of modern risk assessment.

Why risks are overlooked in deals

When capital costs more, buyers must understand what actually drives profit post-closing. Financial and legal due diligence before the purchase remains the foundation. It reveals debts, contracts, taxes, and other clear risks, but rarely how vulnerable the business becomes when people are replaced. Without an understanding of roles, leadership, and culture, the analysis remains incomplete.

Higher interest rates make mistakes expensive

During years of cheap capital, buyers could sometimes tolerate greater uncertainty. There was more room to fix problems after the deal. Now, interest rates, weaker demand, and longer decision-making processes eat away at that margin. A company that looks stable on paper can therefore be difficult to integrate in practice.

This becomes especially clear in organizations where results rely on people rather than robust systems. Therefore, human capital due diligence is increasingly used as a complement to figures and contracts, as this method examines leadership, critical roles, and culture before closing. This type of analysis shows whether the organization can truly support the business plan. As margins shrink, this knowledge becomes directly value-creating.

This is often evident when the buyer calculates synergies. If they rely on managers or specialists who are already overloaded, the calculation easily falls apart. Then, not only does integration become more difficult, but financing also becomes more strained. It also provides a more realistic picture of which synergies are actually achievable.

When buyers underestimate the human side, budgets often look too neat. Costs for new recruitment, knowledge transfer, and management support enter the picture late. This results in lower returns than planned, even if the balance sheet looked reasonable from the start. This is often only noticed when the new management tries to increase the pace.

When human capital is assessed early, the integration plan becomes sharper and value is easier to protect. It also makes prioritization clearer during the initial period after the purchase. It also reduces the risk of expensive wrong hires and late takeovers. In uncertain times, it is often the people, not the model, that determine whether the deal succeeds.

When a few people carry the value

Many companies create more value than is visible in the financial statements. This is often referred to as intellectual capital. A customer manager can maintain important relationships for several years. A technical director might understand the entire product when no one else does. If one or two people carry such functions, the acquisition becomes more vulnerable.

The problem is often only visible after the deal. Anxiety, unclear roles, or changed incentives can cause key personnel to leave. Replacements often take a long time to find and even longer to become fully effective. During this time, momentum, quality, and sometimes even customer loyalty decline.

Therefore, the buyer needs to know which roles can be replaced quickly and which cannot. This determines whether the value is robust or merely temporary. The same question also drives the integration plan post-closing.

The same risk exists in smaller companies where the founder still solves problems that others do not see. When that knowledge lacks clear processes, the transition becomes fragile. The buyer may then pay for a value that is already diminished during the first few months. This directly impacts both pace and trust.

Culture clashes can empty the deal

Many acquisitions lose momentum not because the product is weak, but because the organizations work in different ways. One company may be fast and person-led, while another is built on formal processes and longer decision-making paths. When such patterns meet, friction arises in everything from budgeting to customer service.

Leadership influences how much friction occurs. If managers send different signals regarding responsibility, performance, or rewards, uncertainty grows rapidly. This increases the risk of integration problems, lower engagement, and brain drain. In the long run, the value the deal was supposed to create also diminishes.

The buyer also needs to know whether leaders share the same view on responsibility and decision-making, as integration otherwise often becomes slower than planned. It is equally important to understand which teams hold specialist knowledge and what risks arise if they are split up during the transition. If culture and incentives do not support the new business plan, the right people may focus on the wrong things despite good intentions.

Therefore, culture should not be treated as a soft, secondary issue. In uncertain times, it shows whether the plan can actually be implemented. It affects both the pace and stability of the entire integration.

What holds value after the purchase

In today's market, the quality of a deal is determined not only by price and financing. It is also determined by whether the organization can deliver after the contract is signed. Higher interest rates and greater uncertainty make this question more pressing. The room for expensive surprises has simply shrunk.

Therefore, buyers need to look beyond historical results and legal risks. They need to understand which people, behaviors, and skills create cash flow, customer loyalty, and development.

Only then can the real risk in an acquisition be assessed. This applies both before the deal and during the first critical months afterward.