Opening
Anyone who tries to memorise the list of India's Chief Justices for an exam quickly notices something odd: many recent Chief Justices of India (CJI) have held the post for well under two years, some for only a matter of months. This is not accidental or a sign of instability — it is the direct, mechanical result of a handful of constitutional provisions interacting with each other. A recent compilation tracking every CJI from 1950 to the present has renewed public interest in this pattern, and it is worth unpacking exactly which provisions of the Constitution produce it, because the answer reveals a great deal about how the Supreme Court is designed to function as an institution rather than around any one individual.
What happened
The trigger for this piece is a reference resource listing every Chief Justice of India since the Supreme Court's inception, along with their dates of appointment and length of tenure. Such lists are useful precisely because they expose a structural feature of the Indian judiciary: unlike many common-law jurisdictions where a Chief Justice may serve for a decade or more, India's CJIs are drawn from a strict seniority queue among sitting Supreme Court judges, and every judge — including the CJI — must retire on turning sixty-five. The combination of these two facts means a judge's tenure as CJI is capped by how many years remain between the day they reach the head of the seniority list and the day they turn sixty-five, and for judges elevated to the Supreme Court relatively late in their careers, that gap can be short.
The law behind it
The starting point is Article 124 of the Constitution, which establishes the Supreme Court and governs the appointment and tenure of its judges, including the Chief Justice. Article 124 provides that every Judge of the Supreme Court is appointed by the President after consultation with such judges of the Supreme Court and the High Courts as the President may deem necessary, and it contains an important proviso: in the case of the appointment of a judge other than the Chief Justice, the Chief Justice of India must always be consulted. The article also fixes the retirement age for Supreme Court judges at sixty-five, and it lays down the elaborate procedure — a motion in Parliament supported by a special majority, following an address by each House — required to remove a judge from office. Nothing in Article 124's text, however, expressly commands that the senior-most judge must become Chief Justice; that is a convention that has hardened into settled practice over decades of executive appointments, guided by the Memorandum of Procedure agreed between the government and the judiciary and reinforced by the judiciary's own interpretation, in a line of rulings through the 1990s, that the "consultation" language in Article 124 requires something closer to concurrence with the judiciary's own view on who should be appointed. This is the origin of what is popularly called the collegium system.
Article 126 supplies the safety valve for gaps at the top: when the office of Chief Justice is vacant, or when the sitting Chief Justice is unable to perform the duties of the office owing to absence or otherwise, the President may appoint another judge of the Court to perform those duties as acting Chief Justice. This provision matters more than it might appear, because the seniority-and-retirement mechanism means transitions at the top happen frequently, and the machinery of the Court cannot be allowed to pause even for a short administrative gap.
Article 127 deals with a related but distinct scenario — the appointment of ad hoc judges to the Supreme Court, drawn from High Court judges, when there are not enough judges available to hold or continue a sitting of the Court. Article 128 allows retired Supreme Court judges (and, by extension, retired judges of the former Federal Court) to be requested to sit and act as judges of the Supreme Court, again to keep the institution functioning despite vacancies. Read together, Articles 124, 126, 127 and 128 form a coherent scheme: fixed tenure and mandatory retirement create predictable, regular vacancies, while the acting-Chief-Justice and ad hoc/retired-judge provisions ensure continuity despite that churn.
It is worth contrasting this with the High Courts. Article 217 governs the appointment and conditions of service of High Court judges, including their own retirement age (sixty-two, distinct from the Supreme Court's sixty-five), and Article 222 deals with the transfer of a judge from one High Court to another — a power that has itself generated significant constitutional litigation over judicial independence, though that is a separate strand of law. The point of the comparison is that the Constitution deliberately builds age-based, rule-bound turnover into the judiciary at every level, rather than allowing indefinite tenure, and the CJI's office is simply the most visible point at which that design becomes apparent.
Article 129, finally, declares the Supreme Court to be a court of record with power to punish for contempt of itself — a reminder that the institution's authority is treated as continuous and vested in the Court as a body, not in any particular occupant of the Chief Justice's chair. This is precisely why the frequent change of individual Chief Justices does not, in constitutional theory, disrupt the functioning or authority of the Court itself.
How we got here
At the framing stage, the Constituent Assembly's design for judicial appointments under Article 124 gave the executive a formal role, tempered by a requirement of consultation with the judiciary. For the Supreme Court's first few decades, the President (acting on the advice of the Council of Ministers) exercised real discretion in choosing the Chief Justice, though the practice of appointing the senior-most puisne judge took hold early and was rarely departed from. Judicial interpretation in the 1990s then transformed the meaning of "consultation" in Article 124 into something requiring effective concurrence with the collective view of senior judges, cementing the seniority convention as an almost invariable rule and shifting primacy in appointments towards the judiciary itself through what came to be called the collegium. Because seniority on the Supreme Court is measured from the date of a judge's elevation to that Court (not from their date of birth or their years as a High Court judge), and because the retirement age of sixty-five applies uniformly, a judge elevated to the Supreme Court in, say, their early sixties will reach the top of the seniority ladder — and hence become eligible to be Chief Justice — with only a year or two left before compulsory retirement. This arithmetic, not any political engineering, is what produces the short tenures visible on any list of CJIs, especially in recent years as elevations to the Supreme Court have tended to happen somewhat later in a judge's career.
What it means in practice
For an ordinary litigant, the frequent change of Chief Justice has limited day-to-day effect: cases are heard by benches, not personally decided by the CJI, and the CJI's distinctive powers are largely administrative — allocating cases among benches (the so-called "master of the roster" function), constituting Constitution Benches, and representing the Court in its dealings with the executive and the Bar. For law students and UPSC/judiciary aspirants, the practical lesson is to stop trying to memorise exact dates for every CJI and instead understand the mechanism: seniority plus a fixed retirement age under Article 124 determines tenure length, Article 126 covers vacancies, and the collegium's role in recommending appointments (not itself directly spelt out in the constitutional text but read into Article 124's consultation clause) is a recurring, high-value topic. Questions often test whether a candidate understands that the Constitution nowhere uses the word "collegium," and that the seniority convention for appointing the CJI is itself a practice, not a textual command.
What to watch
Two things are worth tracking without presuming an outcome. First, whether future Memoranda of Procedure or judicial pronouncements alter the seniority convention for CJI appointment in any way, since that convention — unlike the retirement age — is not fixed by the constitutional text itself and has occasionally been debated. Second, whether the pattern of short tenures renews calls, made periodically in public discourse, either for a minimum guaranteed term for the CJI or for revisiting the retirement age; any such change would require a constitutional amendment to Article 124 rather than a mere administrative decision, since the age and tenure provisions are entrenched in the text. Readers should treat any reform proposal in this space with appropriate scepticism until an actual Bill or amendment is tabled, since much of the public conversation around "fixing" CJI tenure remains, for now, commentary rather than pending law.