If you have a Rs. 2,600 UPI transaction ready, a passport photograph and a signature scan on your desktop, and iimcat.ac.in open in a separate browser tab as you read this on Sunday night, you are one of roughly three lakh Indian applicants who will refresh that page at 9:59 am tomorrow. IIM Indore opens the CAT 2026 registration process on August 3 at 10 am IST. This post is what to do with the first hour, and the first ten days after it.
What actually goes wrong in the first hour
The CAT 2026 registration window runs from August 3 to September 15, which sounds like six calm weeks. It is not. The first ninety minutes on August 3 are always the busiest, and the site handles the load poorly.
Three failure modes repeat every year. First, the photograph upload rejects for the wrong reason. The IIM specification is a passport-style colour photo, 35 to 100 KB, JPG only, on a plain white background, taken within the last six months. Photos with a shadow behind the subject, a slight tint, or a resolution over 200 KB get flagged. Fix the file locally before you open the form, not during it.
Second, the payment gateway drops the session. Have the exact application fee amount ready as a UPI collect request or a saved card. If your first attempt fails, do not retry immediately. Wait ten minutes, then re-log in and check under "Payment History" before initiating a second transaction. Duplicate charges take three weeks to reverse.
Third, the confirmation email lands in spam. Whitelist the iimcat.ac.in domain in your email settings before Monday morning.
The five-city expansion, and how to use it
CAT 2026 expands the test-city preference to five, up from four in previous cycles. The pool is roughly 170 cities across India. This is a small change with real consequences.
Metro-city applicants in Bengaluru, Delhi NCR, Mumbai, Hyderabad, and Pune should not list five nearby localities. Bengaluru has centres from Whitefield to Yeshwantpur; picking five Bengaluru zones does not protect you against a bad allotment, it just wastes preferences. A better sequence: home city first, one nearby tier-two city where you have family, and three metros where a friend can host you the night before.
For applicants in tier-two and tier-three cities, the fifth slot is genuinely useful. It lets you keep your home city as first preference, list the nearest metro as second, and then use slots three through five for cities on the closest good rail route. This matters because the November 29 exam date leaves no room for a delayed flight on the twenty-eighth.
Fields you cannot edit after submission
The IIM correction window usually opens in mid-September for 48 to 72 hours. Photograph and signature changes are typically permitted. Name, date of birth, category, sub-category, and PwD status are not editable through the correction window and require a formal grievance submission that rarely resolves before the admit card release.
Before submitting the form, verify three fields against your original degree certificate: full name spelling, date of birth, and gender. Verify your category against your caste certificate or EWS certificate exactly as issued. If any of these do not match, Careers360 recommends waiting to submit until you have the correct document in hand, even if it means registering on August 5 instead of August 3.
If you are a working professional
Working applicants in Bengaluru, Gurugram, Mumbai, and Hyderabad face one specific decision that most CAT prep content ignores: the session slot. IIMs release the forenoon, afternoon, and evening session assignment closer to the exam, and the test city preference cascades into it. A Gurugram applicant who lists their home city first often ends up commuting across NCR on exam Sunday because CAT centres are spread from Sector 18 to Manesar.
The pragmatic move: list your home city first, then two centres within a 20 km radius, then two backup metros where you have close friends or family. This avoids the worst-case outcome, which is a five-hour bus ride the evening before the exam.
What this means for Indian applicants
CAT is the entry point to the IIMs, but for anyone considering the top private B-schools or overseas MBAs, CAT is one of two or three tests worth taking in the same cycle. A candidate who scores 95+ percentile on CAT and 700+ on the GMAT has meaningfully more options than a candidate with one score alone.
If you are targeting ISB PGP or overseas programmes in Round 1, the GMAT should already be done or scheduled for late August. CAT preparation and GMAT preparation overlap on quantitative reasoning and reading comprehension, but they diverge on Data Insights (GMAT) versus DILR (CAT). Running both cycles concurrently is possible; running both cold turkey in October is not.
If you are unsure whether to prioritise CAT, GMAT, or both, an honest profile evaluation with someone who has read hundreds of Indian applicant profiles will save you forty hours of forum-thread reading. If you are already deep into applications and want structured help through Round 1 deadlines, MBA and MiM admissions consulting is where WePegasus concentrates most of its work between now and December.
Common questions applicants are asking
Can I edit my CAT 2026 application after submission?
IIM Indore permits limited edits during the correction window, which usually opens in mid-September for 48 to 72 hours. Photograph and signature changes are allowed. Category, name, and date of birth changes are not editable through the correction window and require a separate grievance process that rarely completes before the admit card release.
What is the CAT 2026 admit card release date?
IIM Indore has not confirmed the exact admit card date. Based on past cycles, expect release around November 5 to 10. You will download it from iimcat.ac.in using your registration ID and password. Save two copies as PDF, one on your phone and one on cloud storage.
Is the CAT 2026 syllabus different from CAT 2025?
No. The three-section structure and topic coverage remain identical. VARC, DILR, and QA each get 40 minutes with no section-switch permitted. Mock test papers and previous-year question sets from CAT 2024 and CAT 2025 remain valid preparation material.
Do I need to write the GMAT if I write CAT?
Only if your target list extends beyond the IIMs, FMS, and JBIMS. If ISB PGP, one-year IIM executive programmes, or foreign schools like INSEAD or LBS are in your target list, the GMAT is a separate requirement. The two tests do not substitute for each other in most admissions processes.
Related reading
Sources verified 2026-08-02. Next review: 2027-01-15. CAT 2026 will be conducted by IIM Indore on November 29, 2026. Registration closes September 15, 2026.