Transition to smart meters

Smart meters give consumers near real time information on energy use – expressed in pounds and pence –  so that they will be able to better manage their energy use, save money and reduce emissions. Smart meters will also bring an end to estimated billing, meaning consumers will only be billed for the energy they actually use, helping them budget better.

The rollout of smart meters in Great Britain will open up new sources of flexibility and new ways in which consumers can engage with the market. We are open to innovation and new business models that seek to take advantage of the opportunities that arise.

The rollout is being led by energy suppliers, who are responsible for installing smart metering equipment, consisting of a smart electricity meter, a smart gas meter, a communications hub and an in-home display at no upfront cost. Gas and electricity suppliers are required by their licence to take all reasonable steps to roll out smart meters to all of their domestic and small business customers by the end of 2020.

If you are a consumer and would like more information about smart meters and the rollout, please see Smart meters: Your rights.

We are responsible for regulating suppliers’ compliance with their smart metering obligations, and we fully believe that smart meters have the potential to bring significant benefits to consumers. Our role is to:

  • protect the interests of consumers
  • monitor energy suppliers’ compliance with their smart metering licence obligations
  • regulate the Data Communications Company (DCC), including through a price control.

We have published a short smart metering licence guide to help stakeholders navigate and understand the rules relating to smart and advanced metering.  This guide is intended as a helpful tool only, and does not modify or replace the conditions in the gas and electricity supply licences.

If you are interested in the number of smart meters installed and operated in Great Britain, please see Smart Meters Statistics that shows quarterly updates by the Department for Business, Energy and Industrial Strategy (BEIS)

Smart Meter Rollout key publications

This is a non-exhaustive list of our most recent publications related to the rollout.

Statutory Consultation on the Post-2020 Smart Meter Rollout Reporting Requirements

We are consulting on our proposals for the post-2020 reporting requirements licensees would be subject to under the proposed new smart meter rollout obligation.

Published: 1st October 2019

Open Letters on the smart meter rollout: Energy Suppliers’ progress and future plans

These open letters set out our observations on suppliers' smart meter progress reports and rollout plans and look forward to the next phases of the rollout. These observations are relevant to all suppliers, regardless of size. 

Published: 19th June 2019

Published: 15th May 2018

Published: 26th June 2017

Open letter on Ofgem's advance metering investigations and the smart meter rollout 

As we enter the final two years of the smart meter rollout, there are a number of lessons to be learned from the rollout of advanced meters that are worth highlighting as suppliers work to meet their smart meter obligations. This open letter sets out some of these lessons.

Published: 31st October 2018

Smart Meter Rollout: DCC user mandate, future rollout plans and consumer experience

This open letter sets out our position on compliance with the DCC user mandate, tolerance for 2018 and 2019 smart meter rollout milestones, future submissions of revised rollout plans and consumer engagement.

Published: 1st December 2017

Suppliers' responsibilities and restrictions on domestic smart meter installation costs revised in light of changes to relevant Supply Licence Conditions

This sets out key licence conditions that will apply to suppliers seeking to recover additional costs from the installation of domestic smart meters.

Published: 27th July 2017

Decision to amend the framework for regulating large energy suppliers with respect to their smart meter rollout plans, and the setting of annual milestones

We decided, following our January 2017 consultation, to amend the framework for regulating large energy suppliers with respect to revised roll-out plans and annual milestones in 2018.

Published: 26th June 2017

The smart meter roll-out: Observations on suppliers’ rollout preparations and small supplier rollout template guidance

This letter sets out our general observations on both large and small suppliers’ 2016 smart meter rollout plans.

Published: 15th November 2016

This letter sets out our general observations on suppliers’ 2016 smart meter rollout plans, and offers reporting guidance to small suppliers.

Published: 29th January 2016

Guidance note on cooperation between competitors on the smart meter rollout

This note recognises that significant consumer benefits could be delivered through sharing of best practice and provides general guidance on the potential risks of breaching competition law and some examples of how suppliers can reduce those risks.

Published: 12th May 2016

Decision on supplier reporting to Ofgem during the smart meter rollout

Our decisions on supplier reporting annual milestones and wider rollout monitoring during the rollout.

Published: 6th October 2014

Data and Communications Company (DCC)

A key element of the rollout in Great Britain is the development of a centralised smart metering communications infrastructure to send and receive information from smart meters to energy suppliers, energy network operators and energy service companies. This is being provided by the Data and Communications Company (DCC), which is operated by Capita PLC under a licence regulated by us. The DCC is needed to ensure that the enduring and full benefits from smart meters are realised, and that the smart metering system as a whole works smoothly once many millions of smart meters have been installed.

Smart Energy Code (SEC)

The SEC is an industry code that sets out the terms for the provision of the DCC’s services and specifies other provisions to govern the end-to-end management of smart metering. Like other industry codes, we are responsible for approving any modifications to ensure consumers’ interests remain protected.

 All active suppliers are required to accede to the Smart Energy Code (SEC) and become a Party to the code. This step must be completed before you begin the process of becoming a DCC user. If you have not already completed this process, you can find all the information on how to become a SEC Party on the SEC Website. The information checklist on what’s required to become a DCC user can be found here on the Smart Energy Code website.

If you have any further questions relating to the Smart Energy Code, or becoming a DCC user, you can also email the SEC Administrator directly at

Smart Metering Installation Code of Practice (SMICoP)

The SMICoP (Smart Meter Installation Code of Practice) sets out the minimum standards suppliers are required to follow in relation to customer facing aspects of smart meter installations, and include specific requirements relating to vulnerable consumers. The latest version of the SMICoP as well as other useful information (such as changes that have been made since it was first approved) can be found at the SMICoP website.

Smart Energy GB

Smart Energy GB is a not-for-profit organisation established to lead the national consumer engagement campaign for smart meters. It is independent of government, it is not an energy supplier and it does not fit smart meters. Smart Energy GB’s role is to inform everyone, including low-income, vulnerable and prepay customers, on how they can use their smart meter and understand its benefits. Further information on the benefits of smart meters, what they are and how they work, is available on the Smart Energy GB website.

Smarter Markets Programme

Smart meters can enable reform to existing market arrangements, such as change of supplier processes, which can in turn make the market work better for consumers. Our Smarter Markets Programme aims to proactively identify, and see implemented, changes to these arrangements to enable the development of smarter markets.

Publications and updates

  • Published: 14th Jan 2016
  • Decisions
  • 1 Associated documents
A change was proposed to the SMICoP to amend the voting structure of the SMICoP Governance Board, and to clarify the definition of large and small suppliers in the context of the the SMICoP.

  • Published: 14th Jan 2016
  • Decisions
  • 1 Associated documents
A change was proposed to the SMICoP to clarify the Members to which the SMICoP applies, and the responsibilities those Members have with respect to the SMICoP.

  • Published: 8th Jan 2016
  • Decisions
  • 1 Associated documents
This change request proposed to clarify suppliers’ obligations under the SMICoP when installing a smart meter under warrant. The Authority withheld approval of this change request on 8 January 2016.

  • Published: 7th Jan 2016
  • Closed: 4th Feb 2016
  • Consultations and responses
  • 4 Associated documents
On 24 December 2015 DCC submitted an updated charging statement to us. This was in the form that it expects to use for the regulatory year starting on 1 April 2016. We will consider whether to approve the form of the charging statement and we are seeking...

  • Published: 17th Dec 2015
  • Open letters and correspondence
  • 0 Associated documents
We’ve considered responses, and are now issuing a further consultation for our final proposals on DCC’s role in developing a Centralised Registration Service.

  • Published: 17th Dec 2015
  • Closed: 22nd Jan 2016
  • Consultations and responses
  • 15 Associated documents
A statutory consultation to place obligations on DCC to develop a Centralised Registration Service and to fund this activity. We also propose changes to introduce a penalty interest rate regime.

  • Published: 16th Nov 2015
  • Closed: 15th Dec 2015
  • Consultations and responses
  • 19 Associated documents
This document sets out our final policy proposal to repeal suppliers’ two-yearly meter inspection licence conditions, and consults on licence modifications to enact this policy.

  • Published: 25th Sep 2015
  • Open letters and correspondence
  • 1 Associated documents
Smart meter in-home display (IHD) licence conditions: Our response to DECC's consultation on proposed modifications to the IHD licence conditions.

  • Published: 1st Sep 2015
  • Consultations and responses
  • 1 Associated documents
This publication sets out Ofgem’s response to DECC's July 2015 consultation on the Smart Energy Code.

  • Published: 20th Aug 2015
  • Decisions
  • 2 Associated documents
This letter sets out the Authority’s decision to approve the form of the Charging Statement for Service Charges prepared by Smart DCC Limited and its reasons for that decision.