Mergers and Acquisitions are the vital growth strategies of corporates in the scenario of of globalization and liberalization to face competition and move ahead. M&A have grown not only in volume but also in value. It is often stated that the companies go for inorganic growth strategies like M^A to improve performance. There is no clear-cut support from the literature about the effect of M7' a on corporate performance. as per various studies, companies perform either better or worse after M&As. But the question arrises how long the effect of M^As remaining on the companies. That present study is an attempt to find out the time frame for knowing the effects of performance of manufacturing companies from M&A. The results suggest that the impact of M&A on companies are reflected in the immediate years specifically the event year and the post M&A a one year.