The Utility Regulator has issued a decision to maintain the current seasonal multiplier factors to be applied to non-annual capacity bookings in the postalised tariff from 01 October 2025.
The annual consultation on these factors was published on 12 March 2025 as required by EU Regulation 2017/460, the Network Code on Harmonised Transmission Tariff Structures for Gas (‘TAR NC’) and as amended following EU Exit.
Seasonal multipliers factors apply to non-annual entry gas capacity products, for example, monthly or daily capacity bookings, by applying a factor which either increases or decreases the relevant proportion of the annual tariff.
The seasonal factors reflect the seasonality of gas flows during the year. They are intended to incentivise suppliers to make more use of the network in the summer and shift demand away from the winter peak.
The multiplier factor incentivises the use of annual capacity. The tariff for a non-annual capacity product is calculated by multiplying the annual tariff by the appropriate seasonal multiplier factor. The seasonal multiplier factors have been included in the gas transmission charging regime since October 2015.
We have received two responses to the consultation from:
- ESB Generation and Trading (ESBGT): and
- Gas Market Operator Northern Ireland (GMO NI).
The respondents were supportive of the proposal to maintain the current factors. As those factors meet the requirements of EU Regulation and continue the alignment with ROI. Following the consideration of the responses received, we have decided to maintain them for gas year 2025/2026.
These factors continue to meet the requirements of the TAR NC.
Copies of all documents can be made available in large print, Braille, audio cassette and a variety of minority languages if required.
Please contact John Wasson on 028 9031 6625 or email: Gas_networks_responses@uregni.gov.uk with cc to John.Wasson@uregni.gov.uk to request this.