Why M&A Deals Don’t Deliver as Expected
Many mergers look successful on paper but struggle after closing. Here’s why integration, people and execution can determine whether an M&A deal delivers its expected value
Most mergers and acquisitions look like a good deal when the decision is made. On paper, the deal can look profitable, with clear growth opportunities and expected cost savings.
Leadership signs off, the deal closes, and then the real work starts. The two organisations, with different systems, cultures, ways of making decisions, and different ideas, come together on how things should be done. The problems usually become clear once the two businesses have to work as one.
What does the research show
According to the compiled research by CT Acquisitions from Harvard Business Review, KPMG, and BCG, between 70 and 90% of M&A deals are destroying value for the acquiring company. KPMG’s survey has stated the synergy shortfall rate at 83%. BCG's 2026 M&A report found that 60% of deals were still trailing the acquirer's share price a full year after closing. In many cases, the expected value simply never shows up.
What Happens to Employees After an Acquisition
Financial loss isn’t the only loss that happens. According to EY's research, 47% of the employees leave within the first year of acquisition. By the third year, 75% of the workforce is gone. These aren't just the numbers; these are the people who understood how the business was working and who kept the day-to-day operations running. When they leave, the value the acquirer paid a premium for often walks out with them.
What Successful Deals Do Differently
Most of the integration plans start after the deal closes, which is already too late. The decisions that determine whether the merger will succeed before the project begins, not after one month of hardship.
Integration is not just any normal project that runs alongside the business, but rather it's a responsibility that demands the same level of attention and accountability as the deal negotiation before it.
The deals that work are usually the ones where leadership has a clear integration plan before the deal closes.
About Mansi Avhad
Mansi Avhad leads editorial content with a focus on SEO-driven writing that aligns user intent with clear, simple communication. She excels at simplifying complex topics into meaningful narratives. She believes good content should be simple, intuitive, and genuinely helpful.
