What is the right age to appear for UPSC?

Few people have a clear idea of what they want to become at this early stage.According to UPSC guidelines, the minimum age to appear for UPSC is 21 years old.Some students begin IAS test preparation immediately after their SSC, while others wait till they have completed their graduation.The advantage of beginning preparation at the age of 16 is that they have ample time to grasp the selection procedure and thoroughly prepare for the IAS exam. There is a good probability of passing the exam on the first try.