The age for UPSC IAS is calculated from the August month of the year in which the exam will be conducted. The age limit for the UPSC 2023 exam is as follows: 1. The minimum age criteria is that the candidate must have completed 21 years of age. 2. The maximum age limit is that the applicant should not be more than 32 years old in the general category. For OBC, this age limit is 35, and for SC and ST it is 37 years. The age will be calculated as of August 1, 2023 for UPSC IAS 2023.