Consumer guide to understanding energy meters | Ofgem

Mae’r dudalen yma ar gael yn Gymraeg.

Energy meters measure the amount of gas and electricity you use. They’re vital to ensuring you are accurately billed.

Gas and electricity meter types aren’t all the same. Here we explain the different types – from standard meters to dial, prepayment meters to digital and smart meters – and how you can read your meter.

How do I read my gas and electricity meters?

Reading your meters often and supplying the readings to your energy supplier is important. It helps ensure your bill only covers the energy you’ve used and isn’t based on an estimate, which could mean you are paying too much or too little. If you choose to switch supplier, you’ll also need to give accurate readings to your new supplier. So it’s helpful to know how to read your meters.

Citizens Advice give an easy graphic guide on how to read the different kinds of traditional gas and electricity meter. See Reading your meters (opens another website)

Your meter reads are automatically sent to your supplier if you have a smart meter. Find out more in ‘smart meters’ below. 

How do I give my meter readings to my supplier?

You can usually call your supplier or submit your meter readings on their website or via an app if you have your personal details and account number. You can find your supplier’s contact details on your energy bill. If you aren’t sure who your supplier is, see Who is my gas or electricity supplier?

Your meter reads are automatically sent to your supplier if you have a smart meter. Find out more in ‘smart meters’ below. 

Problems reading my meter

If you have problems reading your meter, contact your energy supplier for help. See Who is my gas or electricity supplier?

Depending on your circumstances, you may also be eligible for extra help from energy services, including support under the Priority Services Register or ‘PSR’.

If you need it, you can also get further help and advice from the Citizens Advice consumer helpline (opens another website).

If you think your energy meter is faulty

Your supplier is responsible for making sure your gas and electricity meters work properly. 

If you think things aren’t working as they should - for example if your bill is unusually high or you see an error message  - contact your supplier straight away. 

If you’re a tenant and your landlord pays the energy bills, your landlord is responsible for contacting the energy supplier.

See the Citizens Advice website for a short guide on checking if your meter is faulty (opens another website).

Types of gas and electricity meter

Smart meters

Smart meters are the new generation of gas and electricity meters replacing older,  ‘traditional’ meters, including prepayment meters. They show you how much energy you are using in pounds and pence, in near real-time, through an in-home digital display. 

Your energy use plays a big part in the price you pay for your energy, and the in-home displays that come with smart meters can help you track what you use and understand where you might be able to make reductions that could save you money. Smart meters will also send your energy reads direct to your supplier, so will mean the end of estimated bills.

If you have a smart meter, you should still shop around to ensure you’re on the best energy tariffs for you. Find tips and advice on our page How to switch energy supplier and shop for a better deal.

All energy suppliers must aim to install smart meters in every home in England, Wales and Scotland by 2020. They will contact you to tell you when you can get one or you can contact them and request one.

Your supplier is responsible for installing any smart metering equipment. This includes a smart electricity and gas meter, an in-home display that will tell you about your energy usage in pounds and pence, and a communications hub that will send and receive information over a secure network (for example, to your in-home display or to your supplier so they can bill you accurately).

See the Smart Energy GB website for further information on supplier installation plans and how to contact your supplier if you want to request one before they contact you.

While we and the government think that all consumers will benefit from smart meters, they aren’t compulsory and you can choose not to have one. Find out more in Smart meters: Your rights.

You can find out more about Ofgem’s work in the roll out of smart meters at Transition to smart meters.

Prepayment meters (sometimes known as ‘token’ or ‘key-card meters’)

A prepayment meter lets you pay upfront for your gas or electricity use, or both. You can top up a prepayment meter using an app on your phone, by text or through a token or key card at a shop. How much you credit your account is up to you.

Usually the tariffs available for prepayment meters are more expensive, so you should carefully consider your options before having a prepayment meter installed or if you move into a property with one already installed.

Prepay safeguard tariff (or ‘price cap’)

The Competition and Markets Authority has introduced a safeguard tariff to help protect prepay consumers. This limits how much a supplier can charge you per kWH (this is the ‘unit’ measure which your bill is calculated from). Ofgem sets the level of the tariff, ensuring it reflects an estimate of the true cost to supply energy to you. This price protection stops suppliers from overcharging you. Find out more at Energy plans: What is the energy safeguard tariff (or ‘price cap’)?

Prepayment meters and debt

If you are struggling to pay your energy bill and get into debt with your supplier or if you are having difficulty repaying an agreed repayment plan, your supplier may suggest that you have a prepayment meter installed.

A supplier can apply to the court and install a prepayment meter under a warrant as a last resort when you fall into debt. Following rule changes by Ofgem, we have banned suppliers from using warrants in certain cases where it would be severely traumatic due to a consumer’s mental capacity and/or psychological state.

We have banned suppliers from charging warrant-related costs in certain other cases such as where your vulnerability has significantly impaired your engagement with the supplier during the debt recovery process or where the charges would exacerbate your existing financial vulnerability by requiring them to pay additional warrant-related charges. In all other cases they can only charge you a maximum of £150. 

Ofgem is committed to protecting consumers from experiencing more debt or hardship due to warrant installations. 

The safeguard tariff and warrant cap are intended as interim measures until 2020, the date by which the government wants suppliers to have rolled out smart meters to every home in England, Scotland and Wales.

Further information and support

Economy 7 and Economy 10 (or ‘heatwise’) meters

Economy 7 and Economy 10 (or ‘heatwise’) meters are used for ‘Economy 7’ or ‘Economy 10’ tariffs, where you get a cheaper rate for your usage for either 7 or 10 hours of the day.

Economy 7 meters track your usage separately depending on if it’s daytime or night-time. The rate you pay is usually cheaper at night than during the day.  

Economy 10 is similar, but you get three of your cheaper hours in the afternoon on top of the seven you get at night.

Some of these meters will display one set of numbers (showing the day rate) and you press a button to show the night rate, and some will show two sets of numbers.

If you want to switch to or from Economy 7 or Economy 10, you may have to have a new meter installed. Contact your supplier for further advice. The Citizens Advice energy shopping guide also provides essential information to help you know how to shop for the best tariff for you: Energy tariffs and deals (opens another website).

The Citizens Advice consumer helpline can offer you further help and advice on installation issues or concerns if you need it.

Standard meters (or ‘mechanical meters’)

Standard meters use a mechanical display to show your readings. Your usage is measured based on the number of revolutions the dial on the meter makes. It’s the most common type of meter.

See the Citizens Advice energy shopping website for a graphic guide and tips on Reading your meters (opens another website)

Dial meters (or 'analogue meters')

Dial meters look like clocks and usually have six dials. You take your meter reading from the first five dials based on where the dial hand is pointed. Ignore the sixth final red dial if it is at the end, or any dials without figures. Dial meters can be more complex to read as the dials next to each other move in opposite directions and you may need to adjust the reading depending on where the dial hands are pointed.

See the Citizens Advice energy shopping website for a graphic guide and tips on Reading your meters (opens another website)

Digital meters

Digital meters show your reading in a straightforward digital display. You may need to press a button to show the reading.

See the Citizens Advice energy shopping website for a graphic guide and tips on Reading your meters (opens another website)

If you’re not sure what type of gas or electricity meter you have, contact your energy supplier for advice. You can find their contact details on your bill, or see Who is my gas or electricity supplier?

Can I move my gas or electricity meter?

If your gas or electricity meters are in a position where it is difficult for you to take meter readings, or you’re doing building work, you could be eligible to have your meter moved. Usually this is free, but it could come with a cost depending on the requirement and your circumstances. If it's difficult to access your meter or take readings and you're on the Priority Services Register or ‘PSR’, your supplier should move the meter for free. 

It’s illegal to move an energy meter yourself.

Contact your supplier for further details. See Who is my gas or electricity supplier?

You can find further advice in the Citizens Advice guide: Move your gas or electricity meter (opens another website).

Get help and advice

If you need help, advice or further assistance:

More guides on energy meters

Publications and updates

  • Published: 30th Apr 2013
  • Factsheets
  • 1 Associated documents
This factsheet explains flexible energy use, how demand-side response works and how being flexible with how and when you consume electricity could save you money.