How Much Does a Smart Meter Cost?

Are smart meters free? Yes. A smart meter costs nothing to have installed, there is no upfront charge for the equipment, and no separate line appears on your bill for having one. Energy Saving Trust puts it plainly: "Smart meters are completely free, and there's no upfront charge for the installation."¹ Which? confirms the same position: "there is no upfront charge for a smart meter"².

The honest answer to "what does a smart meter cost?" has a second half, though. The programme is not free to run, and its costs are recovered through everyone's energy bills over time rather than as a charge to the household that receives the meter. Welsh Government guidance states this directly: "There's no direct cost for a smart meter; any expenses are recouped through your energy bills over time."³ So the meter costs you nothing on the day, nothing itemised thereafter, and a share of the programme's cost sits inside the standing charges all customers pay. This page sets out both halves of that answer, along with where charges can arise, what a smart meter actually does, and what it does not do.

Understanding smart meters and their role

A smart meter is a digital device that records electricity and gas usage in real time⁶. Its defining feature is what happens to those readings: instead of someone walking to the meter cupboard twice a year, the meter automatically sends your electricity and gas readings to your supplier⁷. That single change is behind most of the benefits and most of the limitations discussed later on this page.

The meter does not use your broadband to do this. It does not need, or connect to, the public internet or your home Wi-Fi⁸. Readings travel over a dedicated secure network, described in more detail under smart meter communications, which is run by the Data Communications Company (DCC) and is separate from anything in your home beyond the meter itself.

Alongside the meter, most installations include an in-home display, a small portable screen that shows you how much energy you are using during the day⁹. The meter and the display are separate things: the meter records and transmits, the display just makes the information visible in your kitchen or hallway. When everything is working, all the readings are sent automatically via the DCC's secure network to your energy supplier, ensuring you only pay for the energy you have used, not the approximate costs of an estimated bill¹⁰.

Smart meters are free to use and are available both to payment-on-account customers and to prepay customers¹¹. The same device serves both, which matters for households whose circumstances change: a meter installed for credit billing can be switched into prepayment mode without a physical swap.

The installation process and who carries it out

The smart meter rollout is being implemented by energy suppliers across the country, who are installing millions each year¹². Your supplier, not a government body or the DCC, is the organisation that arranges your installation, books the appointment and sends the installer. If you want one, you contact your supplier; if you wait, your supplier is expected to contact you as its rollout reaches your area.

The programme has been running a long time, and its milestones can be set out in order:

1. 2012: suppliers began rolling out smart meters⁴.
2. 1 January 2022 to 31 December 2025: the Smart Meter Rollout Framework, a four-year obligation period¹³.
3. End of 2030: the planned completion of the rollout, by which point every household is expected to have been offered a meter⁵.
4. After completion: the Department passes responsibility for smart metering to Ofgem and the Smart Energy Code governance arrangements⁴.

For a householder that last step changes little day to day, but it signals the shift from a national installation campaign to smart metering as a permanent, ordinary part of the energy system.

Because suppliers drive the rollout, your experience depends partly on which supplier you are with and how it is performing against its targets. More detail on the programme, the targets and progress towards them is on our page on the UK smart meter rollout.

Free to get, but savings are not guaranteed

The core answer bears repeating with its sources attached. You can get a smart meter installed by your energy supplier at no extra cost¹⁴, and the same position is stated across official guidance: installation is at no extra cost¹⁵, free for UK energy customers¹⁶, and available simply by contacting your supplier⁷. There is no charge for the meter, no charge for a standard installation, and no fee for the in-home display.

What "free" does not mean is a discount. A smart meter does not lower your bill by itself. The meter measures; it does not reduce. Any saving comes from what you do with the information, and from the tariffs the meter makes available. Guidance on the savings question is careful on this point: the meter could help you find ways to save money using up-to-date information on your energy use, but the saving is in your hands, not in the device¹⁶.

The programme's costs are recovered through bills in general. Standing charges, the fixed daily element of an energy bill, are the mechanism. Ofgem's price cap work includes a levelisation allowance making sure prepayment and Direct Debit customers pay the same standing charge¹⁷, and network costs make up around one quarter of the total price cap¹⁸. For context, the price cap for 1 January to 31 March 2026 set electricity at 27.69p per kWh with a 54.75p daily standing charge, and a typical dual-fuel Direct Debit bill at around £1,758¹⁹. The rollout's costs sit inside charges of this kind, shared across all customers rather than billed to the households that receive meters.

Where can a charge arise? Not for the standard installation. A supplier may charge only in unusual situations, for example if you ask it to change a smart meter back to a traditional meter, which is expected only under exceptional circumstances and where the supplier agrees it may pass on the costs²⁰. A missed appointment is a separate question covered on our page about missed smart meter appointment charges.

Say goodbye to estimated bills

The most concrete benefit is billing. With a working smart meter you get bills based on accurate meter readings and not estimates²¹, and you do not need to submit meter readings yourself²¹. The meter records energy use automatically in half-hour periods, which is what enables accurate billing by suppliers²². The same benefit is described from the other direction: the meter ensures you only pay for the energy you have used, not the approximate costs of an estimated bill¹⁰.

Estimated bills are not a small annoyance; they are a real financial risk in both directions:

• An estimate that is too low lands you in debt when a true reading arrives.
• An estimate that is too high takes money you did not owe.
• A half-hourly record removes the guesswork from the supplier's side entirely²².

Two qualifications matter. First, accuracy depends on the meter working in smart mode. A meter that has lost contact with its supplier can leave you back on estimates, which is one of the failure modes covered below. Second, accurate billing is not cheaper billing. You are billed for exactly what you used, which is fair, but if your usage is high the bill will faithfully say so. Our page on smart meters and accurate bills goes deeper, including what to do if estimates continue.

Time of use, dual rate and tariff options

The second benefit is access to tariffs that a traditional meter cannot support. With a smart meter you can access more flexible tariffs, including dual-rate tariffs²¹. All smart meters can support tariffs which charge different prices at different times throughout the day and night; comparison sites and suppliers commonly offer Economy 7 arrangements on this basis, and Economy 10 meters are also available²⁰.

This is where a smart meter starts to touch on money rather than just convenience. A tariff that charges less overnight only works if the meter can tell night use from day use, which is exactly what half-hourly recording provides. The same capability underpins the newer time-of-use and flexibility offers described on our pages about smart meters and time-of-use tariffs and the Demand Flexibility Service.

The trade-off is symmetrical and worth stating plainly. Tariffs that charge different prices at different times can charge more at expensive times as well as less at cheap ones. A household that cannot shift its usage out of peak hours may be worse off on a time-of-use tariff than on a flat one. The meter enables the choice; it does not make the choice for you. Without a smart meter, you miss out on easier billing and innovative tariff options altogether³.

Prepayment customers can top up remotely

For prepayment customers the smart meter changes the weekly routine more than anything else. In prepayment mode, you can add credit automatically or without having to visit a shop²¹. Compare that with a non-smart prepayment meter, where you top up at a local Paypoint store or Post Office using the meter's key or card²³. For anyone without a nearby shop, with limited mobility, or with a tendency to run low at inconvenient hours, remote top-up is a genuine practical improvement.

Smart meters are free to use and available for prepay customers just as for payment-on-account customers¹¹, and the same prepayment benefits, including adding credit without a shop visit, are listed among the standard advantages of having one⁷. Switching between credit and prepayment modes can also be done remotely on a smart meter, rather than requiring a meter swap or a visit.

The prepayment angle also connects to fairness in charging. As noted above, Ofgem's price cap arrangements include a levelisation allowance making sure prepayment and Direct Debit customers pay the same standing charge¹⁷, which removed one of the historic penalties of prepaying. Our page on smart prepayment meters covers the practicalities, including checking credit and what happens when you run low.

Faults and fallback mode: the limitations

A smart meter is a device on a network, and devices on networks fail. Your smart meter may stop recording the energy you use, or may no longer send readings to your supplier²⁴. When that happens the meter is said to be operating in a "dumb" mode: it still measures, but it stops communicating.

The causes are specific. A meter not operating in smart mode is one that:

• loses connection with your supplier,
• loses connection after you change supplier, or
• has been installed without being connected to the national communication system²⁵.

Even then, you will still be able to take manual readings²⁵, so the household is not left unable to account for its usage; it is simply back to the old routine.

The scale is not trivial. As of 30 June 2024, the proportion of smart meters not operating in smart mode ranged across large suppliers from 2.6% to 16.3%²⁶, a wide spread that says as much about supplier performance as about the technology. Regulators have responded with enforceable standards: under the Guaranteed Standards of Performance, if a consumer's smart meter is not operating in smart mode for over 90 days due to an issue within the energy supplier's control to resolve, compensation follows²⁷. If a smart meter installation fails due to a fault within the energy supplier's control, the consumer will receive compensation²⁸. Our page on smart meter guaranteed standards sets out the timescales and amounts.

Switching supplier is a related weak point. You can switch suppliers if you have a smart meter, but your new supplier might not offer all the smart meter services, such as remote meter readings, and the meter may need replacing²⁹. The brighter note is that your meter may work in smart mode again if you change tariffs or suppliers³⁰, so a meter that went dumb after a switch is not necessarily stuck that way. Older first-generation meters are the most exposed here; see our pages on SMETS1 and SMETS2 meters and SMETS1 switching.

Your data, your privacy, your choice

Two questions follow every smart meter conversation: what data does it hold, and can you say no?

On data, the reassurance is specific. Personal information such as your name, address and bank details are not stored on your smart meter³¹. The meter holds consumption data; the identifying information lives in your supplier's billing systems, not in the box on your wall. Which? states the same from the consumer side: the meter does not store other personal information that could identify you, such as your name, address or bank account². What the meter does produce is a record of energy use, and the official position on that record is that the data provided by your smart meter puts you in control of your energy usage, meaning you can take energy-saving steps to reduce your CO2 emissions³². Who can see your readings, and what consent you give, is covered in detail on our pages about smart meter data and data consent.

On refusal, the answer is unambiguous. It is your right to refuse the installation of a smart meter²⁰, and it is not compulsory to have one installed: if your energy supplier offers you one, you can refuse¹. Smart meters are optional³.

Renters have the same choice. If you are a private renter, and the energy bills are in your name or you prepay for your energy, you can choose to have a smart meter, after checking the tenancy agreement and letting the landlord know²⁰. Our page on monitoring in flats and rented homes covers the practical details.

Smart meters and independence: the reality

Measured against this site's purpose, helping homes become self-sustaining, a smart meter is an enabler rather than an asset. It generates none of its own energy, stores nothing and controls nothing. What it does is produce accurate, granular information about the energy flowing into, and in some setups out of, your home, and that information is the raw material for almost every independence project: sizing a solar array, choosing a battery, verifying that a heat pump is running as modelled, or joining a flexibility scheme that pays you to shift load.

The honest framing of control matters here. Except by switching, you do not control the tariff your energy supplier sets, but you can change how much energy you use¹⁰. The meter shifts power from the supplier's estimates to your own decisions, but the decisions still have to be yours. Smart meters are also different to smart heating controls, and you can use one without the other¹: a household can have a smart meter and no smart controls, or smart controls and no smart meter, though the two work better together.

The dependencies that remain are worth naming:

• Your supplier installs and maintains the meter, and its systems turn readings into bills.
• The DCC's network carries the readings; without it the meter falls back to manual mode.
• The tariff remains the supplier's to set, not yours, except by switching¹⁰.

A household with a smart meter is not one watt more independent of the grid; it is better informed about its dependence. For homes with solar panels, the meter records the import side of the picture, and our pages on smart meters with solar panels and export metering cover how the two fit together. For the wider question of what monitoring does for a self-sustaining home, see smart meters, monitoring and energy independence.

So: free to obtain, free to run, no itemised charge on your bill, with the programme's costs shared through standing charges. The savings are not automatic; they come from using the information, and from the tariffs the meter unlocks.