Test your electric meter: how to check for accuracy

If you suspect your electric meter is inaccurate, leading to unexpectedly high bills, you can take practical steps to investigate the issue and understand your rights. This guide will walk you through identifying potential faults, performing simple home tests, and navigating the official process for resolution.

Why you might need to test your electric meter

Electric meters are essential for measuring your energy consumption accurately, ensuring you are billed correctly. However, concerns about meter accuracy are common among UK households, often triggered by sudden or unexplained increases in energy bills. While high bills can stem from increased appliance usage, a faulty meter can also be the culprit. Understanding how to verify your meter's performance gives you greater control over your energy costs.

Understanding your energy bills

Reviewing your energy bills is the first step. Look for any sharp, unexplained increases in electricity consumption that do not align with your usage habits. A consistent pattern of higher-than-expected charges, especially if you have not changed your energy use, could be a sign that something is not quite right with your meter.

Common concerns about meter accuracy

Many people worry their electric meter might be running too fast, leading to inflated bills. This concern is valid, as even small inaccuracies can add up over time. While smart meters offer more frequent readings, they can also experience communication issues, which are distinct from the meter itself being inaccurate. It is important to differentiate between a meter that is not sending readings and one that is sending incorrect readings.

Signs of a potentially faulty electric meter

Identifying a potentially faulty electric meter involves looking for both unusual readings and physical signs.

Unusually high or low readings

The most obvious sign of a problem is a significant and consistent discrepancy between your energy usage and your bill. If your bills are suddenly much higher than usual without a change in lifestyle, or if they seem unusually low, it is worth investigating. For example, if your meter readings suggest you are using significantly more electricity than the average UK home, which uses around 2,500 kWh of electricity per year according to Ofgem's typical domestic consumption values (TDCVs) updated from 1 July 2026, it could indicate an issue.

Visual checks and unusual noises

Take a moment to visually inspect your meter. Look for any physical damage, loose wires, or signs of tampering. Traditional meters might have a spinning disc that moves erratically or too quickly when little electricity is being used. Some meters can also make unusual noises, such as buzzing or humming, which could indicate an internal fault.

Smart meter communication issues

Smart meters are designed to send readings automatically, but they can sometimes lose connection with your energy supplier. This often results in estimated bills rather than actual readings. While frustrating, a communication issue does not necessarily mean the meter is inaccurate; it simply means your supplier is not receiving the data. If your smart meter display is blank or shows an error message - especially for a gas meter where the display might be in sleep mode (try pressing a button to wake it) - or if you are consistently receiving estimated bills, contact your supplier to report the communication problem.

Simple home tests for meter accuracy

Before contacting your energy supplier, you can perform a couple of simple, safe tests at home to get an initial indication of your meter's accuracy. These tests do not involve tampering with your meter or performing any electrical work.

The creep test: checking for idle movement

The creep test helps determine if your meter is registering electricity consumption when no appliances are in use.

1. Turn off all appliances: Switch off and unplug every electrical appliance in your home, including lights, televisions, chargers, and anything on standby. Ensure nothing is drawing power.
2. Check your meter: For traditional meters with a spinning disc, observe if the disc is still rotating. For digital meters, check if the consumption display is still incrementing.
3. Wait: Leave everything off for at least 30 minutes.
4. Observe: If the disc on a traditional meter continues to spin, or if a digital meter's reading increases significantly during this period, it could indicate a fault, as no electricity should be consumed.

The load test: verifying consumption

The load test helps you check if your meter is accurately recording a known amount of electricity usage.

1. Note your meter reading: Record the exact reading on your electric meter.
2. Isolate an appliance: Choose one appliance with a known power consumption (e.g., a 1,000-watt (1kW) fan heater or kettle). Ensure all other appliances are still switched off.
3. Run the appliance: Turn on the chosen appliance for a specific period, for example, one hour. A 1kW appliance running for one hour should consume 1 kWh of electricity.
4. Take a new reading: After the set time, turn off the appliance and take another meter reading.
5. Calculate consumption: Subtract your initial reading from the new reading. Compare this figure to the expected consumption of your appliance. A significant difference could suggest an inaccurate meter.

Interpreting your test results

These home tests provide an indication, not definitive proof, of a meter fault. If your meter shows signs of "creeping" or a noticeable discrepancy during the load test, it strengthens your case for contacting your energy supplier. However, minor fluctuations are normal, and these tests are not a substitute for professional assessment.

What to do if you suspect a fault

If your home tests or unusually high bills lead you to suspect a meter fault, the next steps involve official channels.

Contacting your energy supplier

Your energy supplier is the first point of contact. Explain your concerns, detailing any observations from your home tests or consistent billing discrepancies. They may offer to perform their own remote checks or send an engineer to inspect the meter. Keep a record of all communication, including dates, times, and names of people you speak to.

Requesting a meter accuracy test

If your energy supplier's checks do not resolve your concerns, you can request an engineer visit to test the meter's accuracy. If the engineer finds the meter is faulty, the accuracy test is free of charge. If the meter is not found to be faulty, you will be charged for the test. For single-phase electricity meters, this test costs £198 if the meter is found to be accurate. For three-phase electricity meters, the cost is £432, and for gas meters, it is £198.

Understanding the costs and refunds

If the test confirms that your meter is faulty, your energy supplier is legally obliged to refund the test fee and adjust your past bills to reflect the period of inaccuracy. If the meter is found to be accurate, you will not be refunded the test fee.

Your rights and next steps

Knowing your rights is crucial when dealing with potential meter faults and billing issues.

Bill adjustments for faulty meters

If a test proves your meter was faulty, your energy supplier must adjust your bills. This usually involves recalculating your consumption for the period the meter is estimated to have been inaccurate and issuing a refund or credit for any overpayments. The length of this adjustment period can vary but often extends back several months.

Replacing an old or faulty meter

Should your meter be confirmed as faulty, your energy supplier is responsible for replacing it. This replacement, often with a smart meter, is usually free of charge, particularly if you are upgrading from a manual meter. It is also worth noting that older meters, such as those using the Radio Teleswitch Service (RTS), are being phased out. The RTS signal began being switched off from 30 June 2025, meaning these meters must be replaced with smart meters by your current supplier.

Further assistance and complaints

If you are unhappy with how your energy supplier handles your meter accuracy concerns, you can escalate your complaint. Citizens Advice offers free, impartial advice on energy issues and can guide you through the complaints process. If your complaint remains unresolved after eight weeks, you can contact the Energy Ombudsman, an independent body that can make binding decisions to resolve disputes.

Managing your energy bills should be clear and easy to understand. Fuse Energy focuses on straightforward pricing, so you can see exactly what you are paying without unnecessary complexity. If you have a smart meter, you can view detailed usage data through the app or website, helping you understand how you can lower your bills. Our support team is always on hand with fast response times whenever you need help. Click here to switch to Fuse Energy today. Find out about our mission by clicking here.