Hello aspirant,

There is now no drawback to delaying your year to focus on CAT preparation. The only issue is that if you mention only CAT preparation when asked what you actually accomplished in this year during the interview, it could give the interviewer a very unfavourable impression of you from the outset. This is because 99% of applicants to any IIM have completed the preparation either during their final year of undergraduate study or while working for a company.

So you can definitely fill cat form after 1 year gap, but you need to have decent reason for that.

Thank you

Hope this information helps you.