Hello,there is no such ideal time to start your preparation.But it is advisable to start small and slow  so that you can consistently keep up with the preparation. You can start reading the daily newspaper from now.It will take initially longer hours but gradually by referring the syllabus you will know which parts to concentrate and which to Just skim over. You should start your preparation seriously by 3 yearly if you plan to give the exam immediately after your final year. During the second year you can build your foundation by learning the Ncerts from 6th -12th.

You can refer this link to get an overview about the exam https://competition.careers360.com/articles/ssc-cgl/amp Best wishes

Hi,

If you want to give the SSC CGL direct after your graduation or in the last year, you wish to fill the application form, then you can prepare for the exam from your second or third year of the college. As B.tech is of 4 years, if you devote even 3-4 hours daily, you will have enough time to revise and prepare for the examination properly. You can design your timetable that do not affect you B.tech studies also. However, you also have the option for dropping a year after your graduation for preparing for the SSC CGl exam. However, it would be better if you prepare it along with your graduation course only as you will have ample time to prepare for it and can divide and schedule the time accordingly.