This study implements a qualitative research method to determine how cultural integration fails in mergers and acquisitions. Often a company will merge with another because a good opportunity arises or because the second corporation lacks a strategic vision or financial resources to achieve its financial goal. There are many advantages and disadvantages to consider before companies embark on the journey.The decision making of an acquisition encompasses many advantages such as enhancing profitability and lowering operating costs in order to share a common vision and achieve other goals above financial growth. On the other hand, there are many factors to asses after two companies have merged, such as weighing out the strengths and weaknesses of each company, and determining a common vision for both. Most of the time, employees are very worried when aware of the merging process since they know that there will be some disruption within the organization. A poor cultural integration plan will certainly not lead to the achievement of mergers and acquisitions synergy. A mismanaged cultural integration plan will cause mergers and acquisitions to dissolve. Two companies are two different entities with two different cultures including corporate cultures, values, and policies. If mergers and acquirers disagree about the details of elaborating a cultural integration plan and do not convey properly the mergers purpose to the employees. It will be impossible for the organization to create a workforce with a common vision to deliberately reach the merger main goal. Therefore, the merger life expectancy will be shorten.Corporations should create a proven framework which will include new policies and rules that will be fair to both companies corporate cultures.