BharatNotes UPSC offers 83 Prelims centres and 27 Mains centres. Allocation is first-apply-first-allot (except Chennai, Dispur, Kolkata, Nagpur) — meaning if Delhi fills up on Day 3, you get whatever is left. Apply in the first 5 days to lock your preferred city.
How the centre system works
UPSC Prelims is conducted across 83 cities nationwide for CSE 2026. Each city has a hard seat cap (based on schools, colleges and other halls available). When the quota for a city fills up, the system stops accepting applications for that city — even if other cities still have room.
The rule is brutally simple: first apply, first get. Wait three weeks, lose your preferred centre.
The four "quota-protected" centres
Four centres operate outside the first-come-first-served rule because of legacy regional-balance considerations:
- Chennai
- Dispur (Guwahati)
- Kolkata
- Nagpur
These centres do not have a candidate ceiling — they accept applications throughout the window. But they're not infinite either; halls do fill up, so even here, applying early is wise. Additionally, PwBD candidates can opt for any desired centre regardless of the ceiling — a recent accessibility expansion.
Mains centres — the 27 cities
Mains is held in 27 cities for CSE 2026: Ahmedabad, Aizawl, Bengaluru, Bhopal, Chandigarh, Chennai, Cuttack, Dehradun, Delhi, Dispur (Guwahati), Hyderabad, Jaipur, Jammu, Kolkata, Lucknow, Mumbai, Patna, Prayagraj (Allahabad), Raipur, Ranchi, Shillong, Shimla, Thiruvananthapuram, Vijayawada, plus three more rotated by state.
Mains centre is selected during DAF-I (not in the Prelims form). Same first-come logic applies, with quota protection for Chennai/Dispur/Kolkata/Nagpur.
Centre allocation statistics — what we know
| Centre Tier | Typical seats | Fill-up day |
|---|---|---|
| Delhi | ~45,000 | Day 4–6 |
| Mumbai | ~30,000 | Day 6–8 |
| Bengaluru | ~22,000 | Day 8–10 |
| Hyderabad | ~18,000 | Day 10–12 |
| Tier-2 (e.g., Jaipur, Patna) | ~10–15,000 each | Day 12–18 |
| Smaller centres (e.g., Aizawl, Shimla) | ~3–8,000 | Often available till close |
| Chennai / Kolkata / Dispur / Nagpur | Unlimited | Open throughout |
Numbers are approximate from historical patterns — UPSC does not officially publish per-centre caps.
How to choose smartly
- Pick your hometown or current city — exam-day logistics matter more than you think. Familiar transport, food, sleep environment = 5 marks at the margin
- Avoid mega cities if you don't live there — Delhi/Mumbai centres can mean 60-minute commutes, parking nightmares, lost time
- Don't pick based on coaching friends — friends won't help you on exam day
- Check that the city has a Mains centre too — if not, you'll travel anyway for Mains
Worked scenario — Delhi-based aspirant with home in Patna
Rahul has been preparing in Old Rajinder Nagar for 2 years. His parents live in Patna. He's torn:
- Delhi centre: Familiar commute, can sleep in own bed, but Delhi venues often 60+ min away from his PG
- Patna centre: Parents' home, no rent, calmer environment, but reverse-commute for Mains (Patna is also a Mains city, so this works)
Decision: He picks Patna for Prelims, books a 3-day trip home around the exam, and uses the calm environment for last-mile revision. He also picks Patna for Mains via DAF-I.
Can you change the centre after submitting?
Mostly no. UPSC's correction window allowed centre edits for CSE 2026 (28 Feb–3 March 2026) — but this is one-time and discretionary. Historically, UPSC does not entertain post-deadline centre change requests, and there is no separate centre-change window between the application close and the exam.
There is one exception: the Commission sometimes shifts candidates involuntarily if a centre is over-subscribed or if a venue becomes unavailable (rare). You'll be informed by email + admit card.
Mentor's checklist before locking centre
- Have I done a Google Maps recon of the area? (Most centres are confirmed only on admit card, but the city is locked here)
- Is there a budget hotel within 2 km, in case I need to stay over?
- Do I have a backup transport plan if Uber/Ola surge?
- Does my Mains city have it as a centre too? (Saves a second relocation in August)
Topper insight — Srushti Deshmukh (AIR 5, CSE 2018)
Srushti, who was preparing in Bhopal, chose Bhopal as her Prelims centre despite many in her batch picking Delhi. She later said in a GS SCORE interview that the calm, known environment shaved off pre-exam anxiety: "The hour before the exam matters more than people realise. Sleep in your own bed, eat your mother's food, walk in five minutes — the OMR feels different."
Pro tip
Apply within the first week of notification. Pay the fee on Day 1, complete Part II by Day 3. You'll get your first-choice centre with 99% probability. Wait till Day 18, you're rolling dice.
Admit-card-stage venue allocation
Remember: the city is locked at application stage. The exact venue within the city (which school, which college) is only revealed on the admit card, usually 7–10 days before the exam. For megacities like Delhi, your venue could be anywhere from Najafgarh to Noida. Plan for this — block hotel stay nearer the city centre if possible, ready to move based on the admit-card address.
