The age limit for candidates applying for the UPSC Civil Services Examination varies depending on the category. Generally, the minimum age is 21 years, while the maximum age is 32 years for general category candidates. There are also age relaxations for specific categories; for instance, Scheduled Castes and Scheduled Tribes enjoy a 5-year extension, while OBC candidates have a 3-year extension. Candidates with disabilities and those who have completed certain government services also qualify for relaxation. Understanding these age criteria is crucial for aspirants to ensure eligibility for participation in this competitive examination.