01. Introduction
Every CAT cycle, a common question resurfaces among reserved-category aspirants: exactly how much relaxation does my category actually get, and at which stage of the process does it apply? Honestly, reservation at IIMs isn’t a single flat discount on your percentile—instead, it’s a government-mandated seat-allocation framework that plays out differently at shortlisting, at the composite score stage, and at final admission.
This guide breaks down the IIM reservation percentage for each category, the specific eligibility rules that decide whether you actually qualify for that category’s benefit, the documentation each one requires, and how category-wise CAT cutoffs have played out across IIM tiers in recent cycles—so you can plan your CAT 2026 targets against your actual, verified category status rather than a rough assumption.
| WHY THIS MATTERS: Reservation eligibility is certificate-based, not self-assessed. Candidates who assume they qualify for NC-OBC or EWS status without checking the exact income, asset, and (for OBC) creamy-layer rules risk having their category claim rejected at document verification — even after being shortlisted on a reserved-category cutoff. |
02. The Legal Basis for IIM Reservations
IIMs are Institutes of National Importance and, as centrally funded institutions, are required to follow the Government of India’s reservation framework for admissions. This framework rests on specific constitutional provisions and legislation:
- Articles 15(5) and 16(5) of the Constitution empower the state to provide reservations in admissions to educational institutions for socially and educationally backward classes, including SC, ST, and OBC.
- The 103rd Amendment added Articles 15(6) and 16(6), similarly enabling reservation for Economically Weaker Sections (EWS) among candidates not already covered by SC, ST, or OBC reservation.
- The Rights of Persons with Disabilities (RPwD) Act, 2016, mandates reservation for candidates with benchmark disabilities across centrally funded higher education institutions.
Because these are central government mandates rather than IIM-specific policies, the reservation percentages themselves are uniform across all 21 IIMs—what differs institute to institute is how each IIM applies category-wise relaxation within its own shortlisting and composite-score formula.
03. Category-Wise Reservation Percentages
The Government of India’s reservation mandate applies uniformly across all IIMs for their flagship MBA/PGP programs.
| Category | Reservation Percentage | Basis |
| General (Unreserved) | ~40.5% (residual after other categories) | Open to all candidates |
| NC-OBC (Non-Creamy Layer OBC) | 27% | Central OBC list, non-creamy layer only |
| SC (Scheduled Caste) | 15% | Valid SC certificate |
| ST (Scheduled Tribe) | 7.5% | Valid ST certificate |
| EWS (Economically Weaker Section) | 10% | Applies within the otherwise general pool |
| PwD (Persons with Benchmark Disability) | 5% | Horizontal — applied across all categories above |
| KEY INSIGHT: PwD reservation is horizontal, not a sixth separate pool. A PwD candidate who is also SC, ST, OBC, or General competes for a seat within that category’s PwD sub-quota, not against all PwD candidates nationally—so your caste/income category still matters even if you also qualify as PwD. |
04. How Reservation Applies Across the Admission Process
Reservation isn’t a one-time discount applied only at the final merit list—it runs through every stage of IIM admissions.
- Qualifying Cutoff (Shortlisting): Each IIM sets a separate, lower minimum CAT percentile for each reserved category to qualify for the WAT-PI shortlist. Reserved-category candidates are evaluated within their own category pool, not against General category candidates.
- Sectional Cutoffs: Most IIMs still require reserved-category candidates to clear category-specific sectional minimums in VARC, DILR, and QA — reservation relaxes the bar but doesn’t remove the requirement to clear all three sections.
- Composite Score (Academic Profile, Work Experience): The same composite-score weightage formula generally applies within each category pool, though a few IIMs apply category-specific normalization to the academic profile score.
- Final Selection: After WAT-PI, seats are allotted category-wise against the reserved percentage of that year’s total intake—a reserved-category candidate is competing for a reserved seat, not converting a General seat.
| KEY INSIGHT: Because reserved-category candidates are ranked within their own category pool rather than against the full applicant pool, a reserved-category candidate with a strong profile can sometimes be shortlisted ahead of a General candidate with a numerically higher raw percentile—this is a structural feature of category-wise pooling, not an exception. |
05. SC and ST Reservation: Eligibility and Certificates
SC and ST reservation eligibility is the most straightforward of the categories: it’s based entirely on caste status as recorded in the central government’s SC/ST list, with no income or asset test attached.
- SC reservation: 15% of seats, open to any candidate holding a valid Scheduled Caste certificate issued by a competent authority.
- ST reservation: 7.5% of seats, open to any candidate holding a valid Scheduled Tribe certificate.
- Unlike OBC, there is no creamy-layer exclusion for SC or ST candidates—reservation eligibility applies regardless of family income or parental occupation.
- The certificate must be issued in the prescribed government format and typically needs to be current — candidates should confirm the specific validity window required in that year’s official CAT notification.
06. NC-OBC Reservation: The Creamy Layer Rule Explained
OBC reservation at IIMs applies only to the Non-Creamy Layer (NCL)—candidates from the central government’s OBC list whose families do not meet the creamy-layer exclusion criteria.
| Requirement | Detail |
| Caste listing | Must be on the Central Government’s OBC list—state-only OBC listings that aren’t on the Central list generally don’t qualify for CAT/IIM reservation |
| Family income ceiling | Below ₹8 lakh gross annual income from all sources (salary, business, property, etc.) |
| Parental government service | Certain Group A and select Group B government posts held by parents can trigger creamy-layer exclusion independent of income |
| Certificate validity | Commonly valid for one year from issue, a current certificate is typically required at the time of CAT registration and again at IIM document verification |
| IMPORTANT CAVEAT: Central OBC List status and Non-Creamy Layer status are two separate conditions, and both must be met. A candidate whose caste is on the Central OBC List but whose family income or parental government-service status places them in the creamy layer does not qualify for NC-OBC reservation, regardless of caste listing. |
07. EWS Reservation: Income and Asset Criteria
EWS reservation is available only to candidates not already covered by SC, ST, or OBC reservation and is based purely on economic criteria rather than caste.
| Criterion | Threshold |
| Family gross annual income | Below ₹8 lakh (from salary, business, agriculture, and all other sources) |
| Agricultural land | Below 5 acres |
| Residential flat | Below 1,000 sq. ft. |
| Residential plot (notified municipality) | Below 100 sq. yards |
| Residential plot (non-notified area) | Below 200 sq. yards |
08. PwD Reservation: Benchmark Disability Criteria
PwD reservation applies to candidates with a ‘benchmark disability’ as defined under the RPwD Act, 2016—broadly, a specified disability of not less than 40%, as certified by a designated medical authority.
- Eligible disability categories include visual impairment, hearing impairment, locomotor disability, intellectual disability, and specified multiple disabilities, among others recognized under the Act.
- PwD reservation is horizontal: a PwD candidate is also assessed within their applicable vertical category (General, SC, ST, NC-OBC, or EWS) and competes for the PwD sub-quota within that category’s seats.
- Certification typically requires a specific prescribed disability certificate form, issued by an authorized medical board—candidates should confirm the exact form required for that year’s CAT and IIM admission cycle.
09. Category-Wise CAT Percentile Cutoffs at IIMs
| IIM Tier | General | NC-OBC / EWS | SC | ST |
| Top IIMs (Ahmedabad, Bangalore, Calcutta) | 95 – 99+ | 85 – 95 | 70 – 85 | 60 – 75 |
| Other Older IIMs (Lucknow, Kozhikode, Indore) | 90 – 97 | 80 – 90 | 60 – 80 | 50 – 70 |
| New & Baby IIMs | 85 – 95 | 70 – 90 | 40 – 65 | 32 – 55 |
| KEY INSIGHT: NC-OBC and EWS cutoffs are typically 5-15 percentile points below General; SC cutoffs are commonly 15-30 points below General; ST cutoffs can run 25-35 points below General, with the exact gap widening at the newer, larger-intake IIMs. Sectional cutoffs still apply at every category, and clearing them is frequently what actually determines a shortlist, not just the overall percentile. |
10. Documents Required by Category
| Category | Documents Typically Required |
| SC / ST | SC/ST certificate from a competent authority, in the prescribed government format |
| NC-OBC | Non-Creamy Layer OBC certificate confirming Central List status and current-year income/occupational eligibility |
| EWS | Income and Asset Certificate from a competent revenue authority |
| PwD | Disability certificate on the prescribed form, issued by an authorised medical board, indicating benchmark disability status |
| All candidates | Self-attested copies of Class 10, 12, and graduation mark sheets, along with the relevant category certificate where applicable |
11. Timeline for CAT 2026 and Category Verification
Category certificates are typically uploaded at the CAT registration stage (expected to open in the first week of August 2026), verified again at the IIM-level document submission stage after shortlisting, and may undergo a final re-verification at the time of admission confirmation. Given that certificates like NC-OBC and EWS often carry a one-year validity, candidates should plan to have a current certificate ready not just for registration in August but through the admission-confirmation period typically running into March-April of the following year.
| KEY INSIGHT: Because an EWS or NC-OBC certificate can expire between CAT registration and final IIM admission if the process spans a financial year change, it’s worth budgeting time to renew the certificate proactively around results season rather than assuming the registration-time document will remain valid through final selection. |
12. Frequently Asked Questions
Q1. Can I switch my category after CAT registration if my certificate status changes?
Category selection is generally locked at registration and verified against the certificate submitted at that time; candidates whose eligibility changes (for example, family income later exceeding the EWS threshold) are typically reclassified to General category rather than losing their admission outright, but should confirm the exact process in the current year’s official notification.
Q2. Do SC/ST candidates get any relaxation beyond the percentile cutoff?
Yes—beyond the lower qualifying percentile, SC and ST candidates are evaluated within their own category pool for the composite score and final selection and are not required to compete against the General category applicant pool at any stage.
Q3. Is there a separate reservation for women or NCC candidates?
No formal reservation quota exists for women or NCC cadets under the government framework; however, several IIMs award gender-diversity points within their composite-score formula, which is a separate mechanism from the vertical reservation categories covered in this guide.
Q4. What happens if I qualify for both OBC and EWS?
You cannot claim both—EWS reservation is explicitly available only to candidates not covered by SC, ST, or OBC reservation. If eligible for NC-OBC, that is generally the more favorable choice since OBC cutoffs are typically similar to or lower than EWS cutoffs at most IIMs.
Q5. Does reservation apply to non-IIM CAT-accepting colleges too?
Government-funded institutions accepting CAT scores generally follow similar central reservation mandates, but private B-schools that accept CAT scores are not bound by the same government reservation framework and may set their own category policies—always check each institute’s individual admission policy.
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