Incremental Process - Overview

Incremental processes concern market-based network capacity expansion projects: additional capacity at existing Interconnection Points or the creation of new Interconnection Points, in both cases realized through investments that are underpinned by market commitments. The incremental process (INC) is complementary to network development planning (ENTSOG TYNDP, GRIPs or the Fluxys Investment Plan), as it adds the market perspective concerning readiness to commit on a long term basis to trigger the realisation of specific infrastructure.

In accordance with Commission regulation (EU) 2017/459, adjacent TSOs on each side of Interconnection Points linking entry-exit zones will cooperate during the incremental process. The incremental process is started at least every two years, during odd numbered years, but can also be started in even numbered years. The incremental process is kicked-off by the yearly auctions, which are held in July of each year. The incremental process consists of the following phases:


  • Non-binding demand indications, that can be submitted at any time.
  • Market demand assessment report (DAR), that will conclude whether the conditions are met to envisage the next steps (and therefore a potential network expansion).
  • Design phase, including market consultation and national regulatory agency (NRA) approval of the project(s).
  • Publication of the binding project notice.
  • Binding allocation of incremental capacity, whereby binding bids for capacity are eventually awarded, before a final investment decision (FID) is taken on the necessary investments.

For the assessment of incremental (or new) projects not in the scope of CAM NC, the open season procedure remains applicable.

Incremental process 2021

5 July 2021

30 August 2021

25 October 2021

Capacity Auctions

(first Monday of July)                    

Submission of non-binding
demand indications

Start of work on DAR 2021

(8 weeks after Yearly Capacity Auction start)


Publication of DAR

- On Fluxys website(s)
- On ENTSOG website

(16 weeks after Yearly Capacity Auction start)




Step 1 – Non-binding demand indications

Parties interested in incremental capacity can submit non-binding demand indications at any time. However in the 2021 market demand assessment, Fluxys considered non-binding demand indications submitted no later than 30 August 2021 (cob). Non-binding demand indications received after this deadline will be considered in the next market demand assessment – in 2023.

Non-binding demand indications can be submitted using the non-binding demand indications templates:

Fluxys Belgium

Download this form and send it to

Fluxys TENP & Deutschland

Fill out this form and submit it to the TSO association FNB Gas.

Interconnector UK

Download this form and send it to

Step 2 – Demand Assessment Reports (DAR)

IPs/Market Areas TSOs Document
TTF-ZTP Fluxys Belgium / GTS To be published by 25 October 2021             
TTF-ZTPL Fluxys Belgium / GTS To be published by 25 October 2021
PEG-ZTP Fluxys Belgium / GRTgaz To be published by 25 October 2021
PEG-ZTPL Fluxys Belgium / GRTgaz To be published by 25 October 2021
Trading HUB-ZTP
Fluxys Belgium / Fluxys TENP, Gascade, OGE, Thyssengas
To be published by 25 October 2021
IZT-ZTP Fluxys Belgium / Interconnector UK ltd
To be published by 25 October 2021 

You can also consult the Demand Assessment Reports on the ENTSOG website