Smart Meters UK 2026 — Pros, Cons & Should You Get One?

A smart meter is a next-generation gas or electricity meter that automatically sends your energy readings to your supplier. Unlike traditional meters that require manual reading (either by you or a meter reader visiting your property), smart meters transmit data digitally, giving you and your supplier accurate, real-time information about your energy consumption.

Smart meters were introduced as part of a UK government initiative to modernise the energy system. The rollout began in 2011 and has accelerated since, with the aim of offering every home and small business in Great Britain a smart meter. By mid-2026, over 35 million smart meters have been installed across the country.

Every smart meter installation comes with an in-home display (IHD) — a small portable screen that shows your energy usage in real time, both in kWh and in pounds and pence. The idea is that seeing your costs in real time encourages you to use energy more wisely and reduce waste.

Smart meters replace your existing gas and electricity meters. The installation is free of charge — you do not pay anything upfront. The cost of the rollout is shared across all energy bills through a small surcharge, meaning every household contributes whether they have a smart meter or not.

Not all smart meters are created equal. There are two generations of smart meter technology in the UK, known as SMETS1 and SMETS2. The differences between them are significant and worth understanding, particularly if you are thinking about switching energy supplier.

The SMETS1 Switching Problem

The biggest issue with SMETS1 meters was that they communicated directly with their installing supplier rather than through a centralised network. When a customer switched to a different supplier, the new supplier often could not communicate with the SMETS1 meter, causing it to revert to a traditional (dumb) meter. You would still need to submit manual readings, defeating the purpose of having a smart meter.

This problem has been partially addressed through a government-backed programme to enrol SMETS1 meters onto the Data Communications Company (DCC) network — the same network that SMETS2 meters use. Significant progress has been made, but some SMETS1 meters still experience issues when switching. If you have a SMETS1 meter and are considering switching, ask your new supplier whether they can maintain smart functionality on your meter.

Which Do I Have?

If your smart meter was installed before mid-2018, it is very likely a SMETS1 model. Meters installed from late 2018 onwards are almost always SMETS2. You can also check by looking at the meter itself — SMETS2 meters are usually labelled as such, or you can ask your energy supplier to confirm.

Smart meters offer several genuine benefits that can make managing your energy easier and more transparent. Here are the main advantages:

Accurate Bills — No More Estimates

The most immediate benefit is the end of estimated bills. Because your smart meter sends readings automatically, every bill you receive is based on your actual consumption. This means no more overpaying on estimated bills, no more shock catch-up bills, and no more having to clamber under the stairs or into a cupboard to read your meter manually.

Real-Time Spending Visibility

The in-home display shows you exactly what you are spending in real time. You can see the cost of running individual appliances by turning them on and watching the display respond. This visibility helps many households identify energy-hungry devices and change habits to reduce consumption. Studies by the Energy Saving Trust suggest that active IHD users reduce their electricity consumption by 3–5% on average.

Easier Supplier Switching

With a SMETS2 meter, switching supplier is smoother and faster. Your new supplier can access your consumption data through the DCC network, meaning they can offer you accurate quotes based on your real usage rather than estimates. This makes comparing tariffs more reliable and the switch itself more seamless.

Supporting the Energy Transition

Smart meters provide data that helps energy suppliers and the National Grid manage demand more effectively. This is increasingly important as the UK transitions to renewable energy sources, which require more sophisticated demand management. Some suppliers offer time-of-use tariffs (such as Octopus Agile) that are only available to smart meter customers, allowing you to benefit from cheaper off-peak rates.

Half-Hourly Data

Smart meters record your usage in half-hourly intervals. This granular data, accessible through your supplier’s app or website, helps you understand exactly when you use the most energy. You might discover, for example, that your evening energy use is significantly higher than you thought, or that a particular appliance is drawing power even when you think it is switched off.

While smart meters offer clear benefits, they are not without problems. Being aware of the potential downsides helps you make an informed decision about whether to get one.

Connectivity Issues

Smart meters communicate via wireless networks (mobile networks for SMETS1, the DCC network for SMETS2). In areas with poor signal coverage, particularly rural locations, smart meters may struggle to transmit readings. When this happens, the meter reverts to requiring manual readings, negating its primary advantage. The DCC network used by SMETS2 meters generally has better coverage than the mobile networks used by SMETS1, but gaps still exist.

SMETS1 Switching Problems

As discussed above, SMETS1 meters have historically lost smart functionality when customers switch supplier. While the enrolment programme has improved this, it is not yet fully resolved. If you have a SMETS1 meter, there is still a risk of losing smart features when switching. This should not stop you from switching to a better deal — the savings usually outweigh the inconvenience — but it is worth being aware of.

In-Home Display Limitations

The IHD that comes with your smart meter has a limited wireless range. It needs to be within range of your meter to receive data, which can be a problem if your meter is in an external box or outbuilding. IHDs can also stop working or lose their connection, requiring a reset or replacement. If your IHD stops displaying data, contact your supplier for a replacement — you are entitled to a working display.

Privacy Concerns

Some people have concerns about the detailed consumption data that smart meters collect. Half-hourly readings can reveal a lot about your lifestyle — when you are home, when you sleep, what appliances you use. However, data protection regulations strictly control how this information can be used. Your supplier cannot share your data with third parties without your consent, and you can opt to share only daily or monthly readings rather than half-hourly data if you prefer.

Installation Disruption

Having a smart meter installed takes approximately one to two hours and requires your gas and electricity to be switched off during the process. Some customers have reported issues after installation, such as loss of supply, tripped circuits, or incorrectly configured tariffs. These problems are relatively rare but can be frustrating when they occur. Ensure your supplier provides a contact number for post-installation support before the engineer leaves.

No. Smart meters are entirely voluntary. Your energy supplier is required to offer you a smart meter, but you are under no obligation to accept one. You cannot be forced to have a smart meter installed, and there is no penalty for declining.

However, it is worth noting that suppliers are under government targets to offer smart meters to all their customers. This means you may receive repeated letters, emails, or phone calls encouraging you to book an installation. You are within your rights to decline each time.

If you do decline a smart meter, your existing traditional meter will continue to work as normal. You will need to continue submitting manual readings to avoid estimated bills. There is no plan to make smart meters compulsory, though the government has indicated that it expects the vast majority of homes to have one eventually.

There are very few situations where a smart meter might be required. If your existing meter is faulty or beyond its certification date, your supplier must replace it, and the replacement will almost always be a smart meter. This is because traditional meters are no longer manufactured for the domestic market. Even in this situation, you can request that the smart functionality be disabled if you prefer, though the physical meter itself will still be a smart model.

If you are a prepayment meter customer, a smart meter can be particularly beneficial as it eliminates the need to physically top up at a shop. Smart prepayment meters can be topped up online or through an app, which is especially useful for people with mobility issues or those who live far from a top-up point.

This is perhaps the most important question, and the answer is nuanced. A smart meter alone does not reduce your energy consumption — it is not a magic device that makes your home more efficient. What it does is give you the information and tools to make more informed decisions about your energy use.

Research by the Department for Energy Security and Net Zero suggests that households who actively use their in-home display save an average of around £20 per year. This saving comes from being more aware of energy waste — noticing when appliances are left on unnecessarily, seeing the cost of leaving lights on, or realising how much a tumble dryer costs per cycle.

However, the potential savings are much greater if you combine smart meter data with behavioural changes:

• Identify energy-hungry appliances: Use the IHD to find out which devices cost the most to run, then decide whether to use them less, replace them with more efficient models, or shift their use to off-peak times.
• Time-of-use tariffs: Some suppliers offer tariffs where the unit rate varies by time of day. With a smart meter, you can take advantage of cheaper off-peak rates by running your washing machine, dishwasher, or electric vehicle charger during low-demand periods. Savings from time-of-use tariffs can be £100–£200 per year for households that shift significant consumption to off-peak hours.
• Monitor standby consumption: Many households spend £50–£80 per year on standby power. Your IHD can help you identify and eliminate this waste.
• Set budgets and targets: Many IHDs and supplier apps let you set daily or weekly energy budgets. Tracking your spending against a target is one of the most effective ways to reduce consumption.

The bottom line: a smart meter is a tool, not a solution. Savings depend entirely on how actively you use the information it provides. For engaged households, savings of £50–£200 per year are realistic. For those who install a smart meter and ignore the IHD, savings will be minimal.

The in-home display is a small, portable device (roughly the size of a smartphone) that comes free with every smart meter installation. It connects wirelessly to your smart meter and shows your energy usage in real time. Learning to use it effectively is the key to unlocking the savings potential of your smart meter.

What the IHD Shows

Most IHDs display the following information:

• Current usage: How much energy you are using right now, shown in kWh and in pounds and pence. This updates every few seconds for electricity and every 30 minutes for gas.
• Daily spending: Your total energy cost so far today, helping you track against a daily budget.
• Historical data: Usage and costs for previous days, weeks, and months, displayed as bar charts or graphs.
• Tariff information: Your current unit rate and standing charge.
• Traffic light system: Many IHDs use a green/amber/red colour system to show whether your current usage is low, medium, or high compared to your normal consumption.

Tips for Getting the Most from Your IHD

Place the IHD somewhere visible — on the kitchen counter, in the hallway, or anywhere you will see it regularly. Research shows that people who keep the display hidden away or in a drawer quickly stop checking it and lose the behavioural benefits.

Spend the first week experimenting. Turn appliances on and off one at a time and watch how the display responds. You will quickly learn which devices are the biggest energy consumers in your home. Many people are surprised to discover that their electric shower, kettle, or oven uses far more energy than they assumed.

If your IHD stops working, loses connection, or displays incorrect information, contact your energy supplier. You are entitled to a working in-home display as part of your smart meter installation, and your supplier must repair or replace it at no charge.

Getting a smart meter is straightforward and free. Here is the step-by-step process:

1. Contact Your Energy Supplier

Call your energy supplier or visit their website to request a smart meter installation. Most suppliers have online booking forms that let you choose a convenient appointment slot. You can also wait for your supplier to contact you — they are required to offer smart meters to all their customers and will likely reach out if you have not already been offered one.

2. Prepare for the Installation

Before the engineer arrives:

• Clear access to your gas and electricity meters. Move any items blocking the meter cupboard, box, or wall area.
• Note your current meter readings so you have a record in case of any billing discrepancies during the changeover.
• Ensure someone aged 18 or over is home for the entire appointment. The installation typically takes one to two hours.
• Be aware that your gas and electricity will be switched off during the installation. Plan accordingly — avoid scheduling the appointment when you need heating, hot water, or are cooking.

3. During the Installation

The engineer will remove your old meters and install new smart meters for both gas and electricity (or just one if you only have a single fuel). They will set up the in-home display and show you how to use it. Ask questions — the engineer can explain the display features and help you set up any initial settings.

4. After Installation

Check that your smart meter is communicating correctly by verifying that the IHD is showing real-time data. Log into your supplier’s website or app to confirm that readings are being received. If anything seems wrong, contact your supplier within the first few days so they can resolve it quickly.

Keep your old meter readings noted down for a few weeks after installation, in case there are any billing queries related to the changeover period. Most transitions are smooth, but having a record gives you peace of mind.

At SaveFirst, we help customers understand their smart meter data and use it to make smarter energy decisions. If you have a smart meter but are not sure you are getting the most from it, get in touch for a free review of your energy usage.