You must be a graduate of a recognized university to take the Indian Administrative Services (IAS) exam. The UPSC conducts an IAS test every year, although you can begin preparing as soon as you graduate from high school. Begin by studying the subjects that will be tested the most.
Preparing for the UPSC after graduation might be a difficult task. There is a lot of competition on the IAS test, but as long as you stay focused on your goal, you should be OK. If you plan to take the IAS test while working, be aware that it will be quite tough. You may also take advantage of UPSC online tuition.
College is the greatest venue for brilliant applicants to begin studying for the IAS exam. Three years of college will provide plenty of time to prepare, and the advantage of starting early will be realized.