Basic information

The within-day auctions are taking place every day by starting at full hour for every hour of the day.

Bearing in mind!

  • Within-day auctions are processed based on the uniform-price auction algorithm (the same as for Day-Ahead auctions)
  • There is no comfort bidding functionality for the Within-day auctions
  • Within-Day auctions are published and started at the same time
  • Every Within-Day auction finishes 3.5h before the product runtime

Auction schedule

  • Day-ahead auction for the product runtime of the next gas day takes place everyday at 16:30 CE(S)T
  • The first Within-Day auction has the same runtime (06:00-06:00) and it starts at 19:00 CE(S)T
  • The Within-Day auction for 24h product is longer and it lasts until 02:30 CE(S)T
  • Every consecutive Within-day auctions starts at full hour and lasts for 30 minutes. Every hour the product runtime is reduced by 1 hour
  • The last Within-day auction starts at 01:00 – 01:30 for the runtime of 05:00 – 06:00 (the same gas day)

Within-Day auctions for different gas days will be conducted in parallel


Day-Ahead auction bids for the first slot can be rolled over for the first Within-Day auction (only if no capacity was allocated to the shipper user during the Day-Ahead Auction)

Bearing in mind!

  • The bid will only be placed if

     i) the TSO(s) offer(s) capacity in the respective auction at the concerned network point and if

     ii) there was no cancellation and/ or interruption of the respective day-ahead auction. The starting price and the capacity of the within-day auction might differ from the one of the day-ahead auction.