The age limit for the UPSC Civil Services Examination varies depending on the category and the specific service you are applying for. The age limits are as follows:

For the Indian Administrative Service (IAS) and Indian Police Service (IPS):

•  Minimum age: 21 years
•  Maximum age: 32 years

For the Indian Foreign Service (IFS) and Indian Revenue Service (IRS) (Customs and Central Excise):

•  Minimum age: 21 years
•  Maximum age: 32 years

Age relaxation for certain categories:

•  OBC (Other Backward Classes) category: Maximum age relaxation of 3 years (i.e., maximum age of 35 years)
•  SC (Scheduled Caste) and ST (Scheduled Tribe) categories: Maximum age relaxation of 5 years (i.e., maximum age of 37 years)
•  Defense Services personnel disabled during hostilities: Maximum age relaxation of 3 years
•  Ex-servicemen: Maximum age relaxation of 5 years
•  ECOs/SSCOs (Emergency Commissioned Officers/Short Service Commissioned Officers): Maximum age relaxation of 5 years
•  PwD (Persons with Disabilities): Maximum age relaxation of 10 years for general category, 13 years for OBC category, and 15 years for SC/ST category candidates

It is important to note that these age limits are as per the general eligibility criteria, and specific details may vary from year to year. It is advisable to refer to the official UPSC notification for the most accurate and up-to-date information regarding the age limits and relaxations.

For more details visit their official website of the Union Public Service Commission (UPSC) at https://upsc.gov.in./