Such bookings typically open at 10 AM for AC classes, and at 11 AM for non-AC classes, one day prior to the actual date of journey.
Notably, there are two quotas for booking such tickets, viz. 'Tatkal' and 'Premium Tatkal' quota.
Here's everything you need to know about Premium Tatkal quota bookings.
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Premium Tatkal ticket pricing
To note, Premium Tatkal tickets come with a dynamic fare pricing system for all travel classes. This implies that ticket prices keep varying in accordance to the changing booking rates and seat availability. Generally, Premium Tatkal ticket bookings are costlier than Tatkal tickets.
How to book Premium Tatkal tickets online
First off, log on to the IRCTC website (at 10 AM for booking AC Tatkal ticket and 11 AM for booking non-AC Tatkal ticket).