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 2023


The following diagram illustrates the key dates of the incremental process


3 July 2023


28 August 2023


23 October 2023

Capacity Auctions

(first Monday of July)          


Deadline submission of non-binding
demand indications

Start of work on DAR 2023

(8 weeks after Yearly Capacity Auction start)



Publication of DAR

- On Fluxys website
- 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 2023 market demand assessment, Fluxys considered non-binding demand indications submitted no later than 28 August 2023 (cob). Non-binding demand indications received after this deadline will be considered in the next market demand assessment – in 2025.

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

Download this form and send it to the TSO association FNB Gas.


Download this form and send it to

Step 2 – Demand Assessment Reports (DAR)


IPs/Market Areas TSOs Document  
Fluxys Belgium ZTP-TTF Fluxys Belgium / GTS DAR ZTP-TTF 
Fluxys Belgium ZTPL-TTF Fluxys Belgium / GTS DAR ZTPL-TTF
Fluxys Belgium ZTP-PEG Fluxys Belgium / GRTgaz DAR ZTP-PEG
Fluxys Belgium ZTPL-PEG Fluxys Belgium / GRTgaz DAR ZTPL-PEG
Fluxys Belgium ZTP-THE
Fluxys Belgium / Fluxys TENP, Gascade, OGE, Thyssengas, Creos
Fluxys Belgium ZTP-IZT Fluxys Belgium / Interconnector

Fluxys Deutschland

THE-RU Fluxys Deutschland, GASCADE, Gasunie Deutschland, NEL Gastransport, ONTRAS Gastransport, OPAL Gastransport DAR THE-RU
Fluxys Deutschland
THE-N4G Fluxys Deutschland, GASCADE, ONTRAS Gastransport, Gasunie Deutschland, GRTGaz Deutschland, OGE / NET4gas

DAR THE-CZ           

Fluxys TENP THE-ZTP Fluxys TENP, GASCADE, OGE, Thyssengas, Creos / Fluxys Belgium
Fluxys TENP THE-Switzerland Fluxys TENP, Terranets BW, OGE
Fluxys TENP THE-TTF Fluxys TENP, GASCADE, Gasunie Deutschland, Thyssengas, Gastransport Nord, OGE / GTS
Interconnector IZT-ZTP Interconnector / Fluxys Belgium DAR INT-ZTP
Interconnector IBT-NGG Interconnector / National Gas Transmission DAR INT-NGT

Once the Demand Assessment reports are available you can also consult these on the ENTSOG website