Seniority
Also called: seniority in service · Topic: Civil Services: Role, Accountability and Reforms · NCERT: Beyond NCERT
Meaning
Seniority is an officer's place in the rank order of their service. It is usually fixed by the year of selection and by merit rank within that batch. Seniority decides who is considered first for promotion. Promotion in turn shapes postings, pay and later career steps. Because so much is built on it, changing seniority years later shifts everyone ranked below. It unsettles officers who did nothing wrong and leads to fresh court cases. That is why courts try to protect settled seniority.
Example
In March 2026 the Supreme Court held that the OBC creamy layer must be judged mainly by the parent's post, not by income alone. The creamy layer means better-off OBC families who cannot get reservation. In its November 2026 clarification the Court said the ruling would not revise seniority or reopen appointments already finalised. It would apply only to the pending service allocation of CSE 2025 candidates. For petitioners found to be non-creamy layer, the Court allowed supernumerary posts, meaning extra posts above the sanctioned number. This gave them relief without taking anyone else's place.
Don't confuse with
- Service allocation: this means placing a selected candidate in a particular service (IAS, IPS and so on). Seniority is the officer's rank order inside that service after joining.
- Tenure: this is how long an officer stays in one posting before a transfer. Seniority is about rank order, not time spent in one job.