Have your say
This joint Tariff Interoperability Arrangements Consultation session, hosted by RECCo and the Department for Energy Security and Net Zero (DESNZ) on 17 December 2025 (11:30–12:30 GMT), is open to all REC Parties and industry stakeholders.
The session will be co-led by Project Manager Kevin Redmond and Senior Responsible Owner Chris Stock, with input from DESNZ Policy Advisor Samuel Wroe.
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What to expect
We’ll break down what the Tariff Interoperability Consultation covers, why it matters, and how to get involved, including:
- The introduction of a new REC Schedule
- A progress update on the API Technical Specification and what it means for you
- How to participate in the consultation
- How this work supports innovation, flexibility, and consumer engagement
- A live Q&A with RECCo and DESNZ
About Tariff Interoperability
Tariff Interoperability will make tariff pricing data easier to access, share, and use across the retail energy market.
The Tariff Interoperability API Technical Specification defines a common standard for exchanging tariff information. This will enable new services, improve transparency, and give consumers greater control over their energy use.
DESNZ and RECCo are developing the Tariff Interoperability Arrangements to support innovation, strengthen consumer protection, and help deliver broader market reform.
About the consultation
DESNZ has published the Tariff Interoperability Arrangements Consultation as part of the Smart Secure Electricity Systems Programme.
The proposals introduce a new obligation on Electricity Suppliers to make pricing data available in a standardised format. This is a key step in enabling consumer-led flexibility by automating the connection of Energy Smart Appliances to price signals, helping consumers save money on their electricity bills.
The consultation runs until 20 January 2026 and seeks feedback on:
- Scope and structure of the arrangements
- Tariff data to be included
- Balancing innovation with consumer protection
- Draft REC Schedule, licence condition changes, and technical specification updates
Full consultation materials — including the proforma, letter, and annexes — are available on our Tariff Interoperability Project web page and on the REC Portal.
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Next steps
Once the consultation closes, DESNZ and RECCo will review all responses and refine the arrangements, as well as any required REC Changes.
If you have any questions ahead of the webinar, contact tariffinteroperability@retailenergycode.co.uk
