From the Press Release of SR regarding Premium Tatkal:
Under this scheme, 50% of the berths presently earmarked for tatkal sale will be set aside and sold as PREMIUM TATKAL TICKETS.
These premium tatkal berths can be booked only online and not across the counter.
The fare of the premium tatkal ticket will be dynamic and will increase based on demand upto a specific...
more... ceiling limit.
As in the case of premium tickets, no concession or refund will be applicable on these tickets.
All rules pertaining to booking of tatkal quota will be applicable to booking of premium tatkal tickets also.
However, unlike tatkal quota, the premium tatkal quota will not have any waiting list.All tickets sold under this quota will be confirmed tickets.
It may be noted that the above listed trains will have both tatkal tickets as well as premium tatkal tickets.Further, there is no reduction in the number of seat or berth availability under general booking in these trains.