What the job involves
An Indian Administrative Service officer holds district and state administrative charge: as a Sub-Divisional Magistrate or District Collector at the district level, and in policy and secretariat roles at the state and central level as seniority builds. It is the most sought-after outcome of India’s civil services exam, both for the scope of the role and for the premier standing of the service itself among central government cadres.
Postings follow a state cadre system: officers are assigned to a state cadre early in their career and largely serve within it, with central deputation opportunities as seniority increases.
How to get there
The only route is the Civil Services Examination conducted by the Union Public Service Commission. There is no separate or alternate exam for IAS specifically: the same Civil Services Examination also selects for IPS, IFS and dozens of other central services, and your rank in the combined merit list, together with the service preferences you submit, determines which service you are allotted. A rank in the IAS range is not a separate achievement from clearing the exam; it is a matter of how high your rank falls in one combined process.
Qualification you need
A bachelor’s degree in any discipline from a recognised university is the only academic requirement. There is no restriction on subject studied, which is part of why the exam draws candidates from every educational background.
A realistic timeline
The Civil Services Examination runs in three stages across roughly a year: a preliminary exam that screens candidates, a main written exam of nine papers, and a personality test (interview) for those who clear the main exam. Most successful candidates prepare across multiple attempts, since the number of permitted attempts is limited and the exam rewards sustained, broad preparation over one intensive push. Preparation realistically spans one to three years of serious, consistent study before a first attempt, though this varies enormously by candidate background.