I went through on-campus recruiting at business school (MBA level). Interactions began in October and interviews were held in late January. Interactions with the firm started with a presentation on campus and eventually turned into one-on-one emails and phone calls. The interview process consisted of two rounds, held just a few days apart. The first round consisted of two 50-minute interviews. Each first-round interview consisted of 15 minutes of personal experience discussion, 30 minutes of a business case, and 5 minutes of questions. Each interview was administered by someone who had been at McKinsey for at least 2 years (senior Associate or Engagement Manager). The second round consisted of three interviews in the same format as that of the first round interviews. These three interviews were held with employees who had been with McKinsey at least six years (Associate Principals or Principals, i.e. partners). The decision was given in the evening of the same day as the second round interviews.