Reservation is India's most debated affirmative action policy. UPSC treats it as a high-frequency topic across Prelims, Mains (GS-II), and Essay. The 2024 Constitution Bench verdict on sub-categorization of SCs makes this even more current.
The constitutional framework, commission reports, and Supreme Court judgments form a tightly connected web. You need to know all three layers to answer any question UPSC throws at you.
Constitutional Basis of Reservation
The Indian Constitution does not use the word “reservation” in a single standalone article. Instead, multiple articles across Parts III and IV create the legal foundation.
Article 15(4) allows the State to make special provisions for the advancement of socially and educationally backward classes, Scheduled Castes (SCs), and Scheduled Tribes (STs). This clause was added by the 1st Constitutional Amendment, 1951, directly in response to the Champakam Dorairajan case.
Article 15(5), inserted by the 93rd Amendment (2005), permits reservation in private unaided educational institutions (excluding minority institutions under Article 30).
Article 16(4) empowers the State to reserve posts in public employment for any backward class not adequately represented. Article 16(4A), added by the 77th Amendment (1995), allows reservation in promotions for SCs and STs. Article 16(4B), added by the 81st Amendment (2000), permits carrying forward unfilled reserved vacancies to the next year without the 50% ceiling applying to backlog vacancies.
Article 46 (Directive Principle) directs the State to promote educational and economic interests of weaker sections, particularly SCs and STs. Article 340 empowers the President to appoint a commission to investigate the conditions of backward classes. This is the article under which both the Kaka Kalelkar Commission (1953) and the Mandal Commission (1980) were constituted.
Common student mistake: Confusing Article 15(4) with Article 16(4). Article 15(4) deals with reservations in educational institutions and general advancement. Article 16(4) is specific to public employment. UPSC has tested this distinction in Prelims.
History of Reservation: Pre-Independence to Mandal
Reservation did not begin with the Constitution. The roots go back over a century.
Pre-Independence Developments
The Kingdom of Mysore under Maharaja Krishnaraja Wadiyar IV introduced reservation for backward communities as early as 1902, based on the Miller Committee report. The Kolhapur princely state under Shahu Maharaj reserved 50% of posts for non-Brahmins in 1902. The Government of India Act, 1909 (Morley-Minto Reforms) introduced separate electorates for Muslims, which was a form of political reservation.
The Poona Pact (1932) between Mahatma Gandhi and Dr. B.R. Ambedkar replaced separate electorates for Depressed Classes with reserved seats within the general electorate. This became the template for political reservation of SCs and STs in Parliament and state legislatures under Articles 330 and 332.
Post-Independence Trajectory
The Kaka Kalelkar Commission (1953) was the first Backward Classes Commission under Article 340. Its recommendations were not implemented because the government found its criteria for identifying backward classes unsatisfactory.
The Mandal Commission, chaired by B.P. Mandal, was constituted in 1979 and submitted its report in 1980. It identified 3,743 castes as OBCs (52% of the population) and recommended 27% reservation in central government services and public sector undertakings for OBCs. The report gathered dust for a decade.
In August 1990, Prime Minister V.P. Singh announced implementation of Mandal Commission recommendations. This triggered massive anti-reservation protests across North India. The matter went to the Supreme Court, resulting in the landmark Indra Sawhney v. Union of India (1992) judgment.
Current Reservation Structure
| Category | Reservation Percentage | Constitutional Basis | Key Amendment/Provision |
|---|---|---|---|
| Scheduled Castes (SC) | 15% | Article 15(4), 16(4) | Original Constitution |
| Scheduled Tribes (ST) | 7.5% | Article 15(4), 16(4) | Original Constitution |
| Other Backward Classes (OBC) | 27% | Article 15(4), 16(4) | Mandal Commission (1980), implemented 1990 |
| Economically Weaker Sections (EWS) | 10% | Article 15(6), 16(6) | 103rd Amendment (2019) |
| Total | 59.5% | Exceeds 50% ceiling after EWS addition |
The 103rd Constitutional Amendment (2019) introduced the EWS quota by adding Articles 15(6) and 16(6). EWS reservation applies to persons from general categories (not covered under SC/ST/OBC reservation) with annual family income below Rs 8 lakh. This was the first time reservation was extended purely on economic criteria without a social backwardness component.
UPSC Prelims 2020 asked about the constitutional provisions related to EWS reservation. Know that it added clauses (6) to both Articles 15 and 16.
Key Supreme Court Judgments on Reservation
State of Madras v. Champakam Dorairajan (1951)
The Madras government had fixed communal quotas for admission to engineering and medical colleges. The Supreme Court struck this down as violating Article 29(2) (no denial of admission to state-aided institutions on grounds of religion, race, caste, or language). Parliament responded by adding Article 15(4) through the 1st Constitutional Amendment, explicitly enabling reservations for backward classes in educational institutions.
M.R. Balaji v. State of Mysore (1963)
The Mysore government had reserved 68% of seats for backward classes. The Supreme Court held that reservation cannot exceed 50% of total seats/posts. The Court also ruled that caste alone cannot determine backwardness and that economic criteria should also be considered. This 50% ceiling became a cardinal principle of reservation law.
Indra Sawhney v. Union of India (1992)
This is the single most important judgment on reservation. A nine-judge bench delivered the following holdings:
- 27% OBC reservation in central services is valid
- 50% ceiling on total reservation is a constitutional requirement (not just a rule of prudence)
- Creamy layer must be excluded from OBC reservation
- No reservation in promotions (only at the point of entry)
- Backward classes can be identified on the basis of caste, but caste alone is not determinative
- The carry-forward rule should not cause reservation to exceed 50% in any given year
The creamy layer concept meant that affluent members of OBC communities (annual income above a specified threshold, currently Rs 8 lakh) cannot claim reservation benefits.
M. Nagaraj v. Union of India (2006)
After the 77th, 81st, and 85th Amendments enabled reservation in promotions and consequential seniority for SCs/STs, this case tested their validity. The Supreme Court upheld these amendments but imposed three conditions for reservation in promotions:
- The State must demonstrate backwardness of the class
- The State must show inadequacy of representation in public services
- Reservation in promotions must not affect overall administrative efficiency (Article 335)
Jarnail Singh v. Lachhmi Narain Gupta (2018)
A five-judge bench held that the creamy layer principle applies to SC/ST promotions as well, not just OBCs. The Court also held that the State does not need to collect quantifiable data to demonstrate backwardness of SCs/STs for reservation in promotions (overruling this specific requirement from Nagaraj).
Janhit Abhiyan v. Union of India (2022)
The Supreme Court upheld the 103rd Amendment (EWS reservation) by a 3:2 majority. The majority held that economic criteria alone can be a valid basis for affirmative action and that exceeding the 50% ceiling is permissible for EWS because this is a separate class not competing with SC/ST/OBC categories. Justices Ravindra Bhat and S. Ravindra Bhat dissented, arguing that excluding SC/ST/OBCs from EWS benefits was discriminatory.
Sub-Categorization of SCs: 2024 Constitution Bench
In State of Punjab v. Davinder Singh (2024), a seven-judge Constitution Bench held that states can sub-categorize Scheduled Castes for the purpose of granting more reservation to the most backward among SCs. The Court overruled E.V. Chinnaiah v. State of Andhra Pradesh (2005), which had held that SCs form a homogeneous class and cannot be sub-divided.
The 2024 verdict recognized that there is inequality within SCs themselves. Some castes have historically cornered most reservation benefits while others remain severely marginalized. States can now create a rational sub-classification based on empirical data.
Common student mistake: Students assume sub-categorization means reducing reservation for SCs. It does not change the total SC quota. It redistributes benefits within the existing quota to ensure the most deprived sub-groups get adequate representation.
EWS Reservation: The 103rd Amendment Debate
The EWS reservation raises several constitutional questions that UPSC finds attractive for Mains.
Arguments in favor: Poverty cuts across all communities. Economic backwardness deserves affirmative action. The general category poor had no protection before this amendment.
Arguments against: Reservation was designed to address social backwardness and historical discrimination, not poverty. The 50% ceiling established in Indra Sawhney has been breached. Excluding SC/ST/OBCs from EWS benefits creates an artificial distinction among economically poor persons.
The Rs 8 lakh income ceiling is criticized for being the same as the OBC creamy layer cutoff. If Rs 8 lakh qualifies as "economically weaker" for general categories, the same income is considered "creamy layer" (i.e., affluent) for OBCs. This logical inconsistency has been raised in academic and judicial discourse.
Reservation in Education vs. Employment
UPSC sometimes tests whether students understand the difference between reservation in educational institutions and reservation in government jobs.
Education: Governed primarily by Articles 15(4) and 15(5). The Central Educational Institutions (Reservation in Admissions) Act, 2006 provides for 15% SC, 7.5% ST, and 27% OBC reservation in all central higher education institutions (IITs, IIMs, central universities, AIIMS). EWS quota (10%) was added in 2019.
Employment: Governed by Article 16(4), 16(4A), and 16(4B). Applies to posts under the State. Reservation in promotions is permitted for SCs/STs (with conditions from Nagaraj). The creamy layer concept applies to OBCs in employment.
Political reservation: Articles 330, 332, and 243D reserve seats for SCs and STs in Parliament, state legislatures, and panchayats respectively. OBCs have reservation in panchayats (Article 243D) but not in Parliament or state assemblies.
The 50% Ceiling and Its Exceptions
The 50% ceiling from Balaji and Indra Sawhney is not absolute. The Supreme Court has recognized "extraordinary situations" and "special circumstances" as exceptions.
Tamil Nadu maintains 69% reservation under the Tamil Nadu Backward Classes, Scheduled Castes and Scheduled Tribes (Reservation of Seats in Educational Institutions and of Appointments or Posts in the Services under the State) Act, 1993. This law was placed in the Ninth Schedule to protect it from judicial review. After the I.R. Coelho v. State of Tamil Nadu (2007) judgment, even Ninth Schedule laws can be tested against basic structure, but the Tamil Nadu quota has not been struck down.
Several states including Maharashtra, Rajasthan, and Chhattisgarh have attempted to breach the 50% ceiling for specific communities (Marathas, Gujjars, etc.). The Supreme Court struck down the Maharashtra SEBC Act (Maratha reservation) in 2021, reaffirming the 50% limit.
With EWS reservation, total reservation at the central level now stands at 59.5%. The Supreme Court in Janhit Abhiyan treated EWS as a separate track, effectively creating a parallel stream outside the traditional 50% framework.
Tell Google you want more of this.
Add Anantam IAS as a preferred sourceOne tap, and this site shows up more often in your own Top Stories, AI Overviews and AI Mode. Remove it any time.
