How to Book Lower Berth or Window Seat on IRCTC

IRCTC doesn't let you pick an exact berth number at the time of booking — allocation is automated. But a few settings and habits genuinely improve your odds of getting the seat you want.

Setting Berth Preference While Booking

During booking, look for the "Berth Preference" dropdown (Lower / Middle / Upper / Side Lower / Side Upper / No Preference). Selecting a preference doesn't guarantee it, but it tells the system's allocation logic what to try for first — leaving it blank removes any chance of influencing the outcome.

Why It's Not Guaranteed

Berth allocation depends on overall seat availability in your coach at the moment of booking, other passengers' preferences in the same PNR, and quota-specific rules. In a full coach, preference simply can't always be honoured.

Practical Tips That Actually Help

• Book early in the 60-day window — the earlier you book, the more of the coach is still unallocated, giving preference logic more to work with.
• Senior citizens and women 45+ automatically get priority for lower berths where eligible and available — make sure age is entered correctly.
• Split passengers across two bookings if berth preference matters more than travelling on exactly one PNR — sometimes a smaller passenger count per booking gets a cleaner allocation.
• Use the "current booking" / online berth-change request after your ticket is confirmed — IRCTC's TTE app and station enquiry sometimes allow a manual berth swap request closer to departure, subject to availability.

What About Window Seats?

"Window seat" applies mainly to Chair Car (CC) and Second Sitting (2S) classes. The berth-preference dropdown for these classes usually includes a window option — same rule applies: set the preference early, and book as soon as the window opens for the best chance.

Useful tools: IRCTC booking date calculator · advance reservation period (ARP)