Reservation is the constitutionally mandated system of affirmative action in India that reserves a percentage of seats in public education, government employment, and legislative bodies for historically disadvantaged communities including Scheduled Castes, Scheduled Tribes, and Other Backward Classes. Under Indian law, the framework rests primarily on Articles 15(4) and 16(4) of the Constitution, and the Supreme Court in Indra Sawhney v. Union of India (1992) imposed a 50% ceiling on total reservations while introducing the "creamy layer" exclusion for OBCs.
Legal definition
The constitutional basis for reservation is established through several provisions:
Article 15(4): "Nothing in this article or in clause (2) of article 29 shall prevent the State from making any special provision for the advancement of any socially and educationally backward classes of citizens or for the Scheduled Castes and the Scheduled Tribes."
Article 16(4): "Nothing in this article shall prevent the State from making any provision for the reservation of appointments or posts in favour of any backward class of citizens which, in the opinion of the State, is not adequately represented in the services under the State."
Article 46 (Directive Principles): "The State shall promote with special care the educational and economic interests of the weaker sections of the people, and, in particular, of the Scheduled Castes and the Scheduled Tribes, and shall protect them from social injustice and all forms of exploitation."
Article 340: Empowers the President to appoint a Commission to investigate the conditions of socially and educationally backward classes and recommend steps for their improvement, including grants and reservation of appointments.
The Constitution has been amended multiple times to expand the reservation framework. Article 15(5), inserted by the 93rd Amendment (2005), extended reservations to private unaided educational institutions. Articles 15(6) and 16(6), inserted by the 103rd Amendment (2019), introduced a 10% reservation for Economically Weaker Sections (EWS) in education and public employment.
The current reservation structure in Central Government services and institutions stands at: 15% for Scheduled Castes (SCs), 7.5% for Scheduled Tribes (STs), 27% for Other Backward Classes (OBCs), and 10% for EWS — totalling 59.5%. Individual states have their own percentages, with some exceeding the 50% ceiling through legislative measures.
How courts have interpreted this term
Indra Sawhney v. Union of India [(1992) Supp 3 SCC 217]
A nine-judge Bench delivered the definitive pronouncement on reservation in what is popularly known as the "Mandal Commission case." The Court upheld the Government's order implementing the Mandal Commission's recommendation of 27% reservation for OBCs in Central Government services. The judgment established several binding principles. First, caste can be a valid indicator of social and educational backwardness for the purpose of identifying backward classes. Second, the total reservation under Articles 15(4) and 16(4) must not exceed 50% — the "50% rule" — except in extraordinary circumstances requiring special justification. Third, the "creamy layer" — members of backward classes who have reached a level of social, educational, and economic advancement that they no longer need the protection of reservation — must be excluded from the OBC quota. Fourth, reservations in promotions were held unconstitutional (later reversed by the 77th Amendment inserting Article 16(4A)).
M. Nagaraj v. Union of India [(2006) 8 SCC 212]
A five-judge Constitution Bench examined the validity of constitutional amendments permitting reservation in promotions (Articles 16(4A) and 16(4B)). The Court upheld the amendments but imposed conditions: the State must demonstrate, through quantifiable data, the inadequacy of representation of the backward class in question before providing reservation in promotions. The State must also ensure that overall efficiency of administration is maintained and that the "creamy layer" is excluded.
Janhit Abhiyan v. Union of India [(2022) 6 SCC 521]
A five-judge Constitution Bench, in a 3:2 verdict, upheld the 103rd Constitutional Amendment introducing 10% EWS reservation. The majority held that reservations based solely on economic criteria do not violate the basic structure of the Constitution and that the exclusion of SCs, STs, and OBCs from the EWS quota does not violate the equality code. Justice S. Ravindra Bhat, dissenting, argued that the exclusion of socially disadvantaged groups from the EWS category created an "exclusionary classification" that violated the anti-discrimination principle underlying Articles 14, 15, and 16.
Types of reservation
Indian law recognises several distinct categories of reservation:
- SC/ST reservation: Based on caste or tribal identity as listed in the Presidential notification under Articles 341 and 342. No creamy layer exclusion applies. Currently 15% (SC) and 7.5% (ST) in Central services.
- OBC reservation: Based on social and educational backwardness, identified by the National Commission for Backward Classes. Subject to creamy layer exclusion. Currently 27% in Central services.
- EWS reservation: Based purely on economic criteria (annual family income below Rs. 8 lakh and asset thresholds). Introduced by the 103rd Amendment in 2019. Applies to those not covered by SC/ST/OBC reservation. Currently 10%.
- Reservation in promotions: Permitted under Article 16(4A) for SCs and STs, subject to the conditions laid down in M. Nagaraj (2006).
- Reservation in legislatures: Articles 330 and 332 provide for reservation of seats for SCs and STs in the Lok Sabha and state legislative assemblies.
Why this matters
Reservation is arguably the most socially significant provision in the Indian Constitution. It is the primary mechanism through which the State addresses centuries of caste-based discrimination and structural inequality. For approximately 70% of India's population that falls within the SC, ST, OBC, or EWS categories, reservation directly affects access to education, government employment, and political representation.
For practitioners, reservation litigation is among the most constitutionally complex areas of Indian law. Key questions that recur include: whether a particular community qualifies as a "backward class," whether the creamy layer threshold has been properly set, whether the 50% ceiling has been breached, and whether the State has produced adequate quantifiable data to justify reservation in promotions. The interplay of multiple constitutional amendments (1st, 77th, 81st, 82nd, 85th, 93rd, and 103rd) with judicial pronouncements creates a layered framework that requires careful navigation.
A widespread misconception is that the 50% ceiling established in Indra Sawhney is constitutionally absolute. In fact, the Court itself characterised it as a "rule of thumb" that could be exceeded in "extraordinary situations" with special justification. Several states — including Tamil Nadu (69%), Maharashtra (formerly 68%), and Chhattisgarh (72%) — have enacted reservation percentages exceeding 50%, though these remain subject to constitutional challenge and some have been placed in the Ninth Schedule to shield them from judicial review.
Related terms
Broader concepts:
Related provisions:
Related concepts:
Frequently asked questions
What is the maximum percentage of reservation allowed in India?
The Supreme Court in Indra Sawhney v. Union of India (1992) established a general rule that total reservations should not exceed 50%. However, the Court acknowledged that this ceiling could be exceeded in "extraordinary situations" with special justification relating to the conditions of remote and far-flung areas. Several states have enacted reservations exceeding 50% — Tamil Nadu maintains 69% under a law placed in the Ninth Schedule. With the addition of 10% EWS reservation, the total in Central services now stands at 59.5%.
What is the "creamy layer" and who does it apply to?
The "creamy layer" refers to members of the Other Backward Classes who have attained sufficient social, educational, and economic advancement that they no longer require the protection of reservation. The concept was introduced by the Supreme Court in Indra Sawhney (1992). The current income ceiling for the creamy layer in OBC reservation is Rs. 8 lakh per annum (as of the most recent revision). The creamy layer exclusion applies only to OBCs — it does not apply to Scheduled Castes or Scheduled Tribes.
Can reservation be provided in the private sector?
The Constitution (93rd Amendment) Act, 2005 inserted Article 15(5), which enables the State to make special provisions for the advancement of backward classes, SCs, and STs in admission to private educational institutions, whether aided or unaided (excluding minority institutions under Article 30). However, there is no constitutional provision mandating reservation in private sector employment, though it has been a subject of policy debate. The 103rd Amendment's EWS reservation also applies to private unaided educational institutions, which the Supreme Court upheld in Janhit Abhiyan (2022).
Is reservation in India permanent or temporary?
The original intention of the Constituent Assembly was that reservation would be a temporary measure. Articles 330, 332, and 334 provide that reservation of seats in legislatures for SCs and STs was initially for 10 years, but this has been extended repeatedly — most recently by the 104th Amendment (2020), which extended it until 2030. Reservation in education and employment under Articles 15(4) and 16(4) has no express time limit in the Constitution, and the Supreme Court in Indra Sawhney suggested that reservation policies should be reviewed periodically to assess whether they continue to be necessary.
This entry is part of the Veritect Indian Legal Glossary, a comprehensive reference of Indian legal terminology grounded in statutory text and judicial interpretation.
Last updated: 2026-03-27. Veritect provides this content for informational purposes and does not constitute legal advice.