Hello there, IIM admission process involves three stages

• The first stage is the minimum percentile requirements in CAT, which differs from IIM to IIM
• The second stage consists of WAT (written ability test) / PI (personal interview) or AWT rounds
• Shortlisted candidates from second round go through the stage where extracurricular activities, work experience , the academic record is weighed.

Top IIM colleges

• IIM Ahmedabad- for general category the estimated percentile for CAT is above 99, which requires a requirement of constant range of 70-75 marks in all sections of CAT examination.
• IIM Bangalore- you can get a call at a percentile that is as low as 85 percentile, would be 90 percentile
• IIM Calcutta- it's estimated cut off percentile is 95and above. IIM Calcutta gives the educational and professional qualifications and work experience a huge weightage.  You have  to score (VARC -75, DILR-80, QA-80). The lowest overall percentile for general category would be 90 percentile.
• IIM Lucknow- IIM Lucknow cutoff are categorised into 3 categories, namely PGP, PGP-SM and PGP-ABM. The lowest estimated cutoff for each of the section are 90,86,& 80 percentile respectively for general category. There an overall minimum percentile requirements of 90 is necessary for IIM Lucknow ( female candidates receive two additional points.
• IIM Indore- IIM Indore requires a percentile overall of 90 and above. The institution emphasises your score and your graduation in X and XII.
• IIM Kozhikode- it is also around 90 percentile. This institution awards a 5 per cent gender bonus and 2 percent academic bonus. If selected for the personal interview , the chances of entering the institution as high as the PI is weightage by 45 percent.

Good luck!!