How often must my supplier read my meter?

The key distinction is between what the supplier must do and what you can do. You can submit your own reading at any time, and the Energy Saving Trust advises taking accurate readings and providing them to your supplier so they can send an accurate bill³. If you have a smart meter, readings are sent automatically and you do not need to act¹.

Where a supplier cannot take a reading, it is allowed to estimate. Heat network suppliers, for example, are permitted to estimate if they cannot get to the meter or if no reading has been given for a while⁴. The same principle applies across the domestic market: estimated bills are lawful, but they must be corrected when an accurate reading is provided.

What your supplier owes you under Ofgem's rules

Ofgem's rules place several obligations on suppliers that bear directly on meter readings and billing. Suppliers must work with you to set up a payment plan you can afford⁷. They must reimburse credit balances on request unless there is a good reason not to⁸. Where a supplier wants to install a prepayment meter for a customer in debt, Ofgem rules protect that customer⁹.

On billing accuracy, the back billing rules are the most important protection. If a supplier has continued to send bills based on estimated readings even after accurate meter readings were sent, the back billing rules apply¹⁰. This means the supplier cannot charge for energy used more than 12 months ago in those circumstances. There is an exception: you will have to pay for energy used more than 12 months ago if you have acted unreasonably, for example by stopping your supplier from billing you accurately, including by blocking access to your meter¹¹.

You do need to pay any accurate bill you have been sent, including back bills¹¹. The protection is against supplier error, not against your own consumption.

For residents in park homes and similar arrangements, there are additional rights. Residents paying by meter readings or estimates have the right to see the bills and contract between the landlord or site owner and the energy supplier¹². This transparency matters because the resident may be paying the site owner rather than the supplier directly.

Ofgem's role: monitoring suppliers and enforcing the licences

Ofgem does not resolve individual complaints, but it does monitor suppliers closely. It checks that they meet the rules set out in licences, regulations and law, provide good customer service, and reply quickly to customers who contact them¹⁴. This monitoring role is distinct from dispute resolution.

Ofgem's enforcement powers are real. The Smart Metering Installation Schedule is regulated by Ofgem, which has powers to enforce it by fining suppliers if necessary¹⁵. On the price cap, Ofgem has said it will be closely monitoring supplier compliance and will continue to take firm action against suppliers who fall short of their requirements¹⁶.

Ofgem also administers environmental and social schemes. For the Energy Company Obligation (ECO), Ofgem sets targets for each obligated supplier, ensures compliance, and monitors progress towards those targets¹⁷. Suppliers must notify Ofgem of the measures they have delivered⁴. For the Great British Insulation Scheme, suppliers must provide information to Ofgem on projects delivered³.

The Guaranteed Standards of Performance are another area where Ofgem sets the rules. Ofgem commissioned research to help inform its review of energy supplier Guaranteed Standards of Performance¹⁸. Under GSOP 3, which covers investigating smart meter operational issues, the supplier must complete an initial assessment, take appropriate action and offer to update the consumer within 5 working days¹⁹.

Suppliers are also required by Ofgem's rules to publish their performance in the Citizens Advice Star Rating²⁰. This gives households a way to compare supplier performance on customer service, though it does not resolve individual disputes.

Estimated bills and deemed contracts: the protections that apply

Estimated bills are a normal part of energy supply, but they come with protections. A deemed contract is normally in place when a customer moves to new premises and starts to consume gas or electricity, or both, without agreeing a contract with a supplier¹⁷. Deemed rates are typically higher than standard tariffs, which is why the rules around them matter.

After 6 months, the deemed contract must go back to its normal rate¹⁹. The Energy Ombudsman will consider whether it was appropriate for a supplier to place a customer on a deemed rate contract, or whether supplier error or omission left the customer on high deemed contract prices for longer than necessary¹⁷.

For heat network customers, the protections are similar in principle. The supplier is allowed to estimate if they cannot take a meter reading, for example if they cannot get to the meter or no reading has been given in a while⁴. But the customer retains the right to see the bills and contract between the landlord or site owner and the energy supplier¹².

If a smart meter develops a fault, the supplier must promptly investigate suspected or identified issues, resolve them themselves or with third parties, and keep the consumer informed¹. This is a specific obligation that goes beyond the general duty to bill accurately.

If a reading or bill looks wrong: who handles complaints

The complaints process has a clear structure. Your energy supplier must try to fix any problems you reported within 8 weeks and resolve the complaint⁵. If it does not, the Energy Ombudsman provides an independent service, separate to Ofgem, for problems with an energy supplier, an energy broker, a network operator or a heat network supplier²².

Ofgem itself does not directly get involved with complaints about energy suppliers or network operators, including heat network suppliers and operators, and does not investigate individual disputes¹⁴. This is a common misunderstanding. Ofgem sets the rules and monitors compliance; the Ombudsman resolves individual cases.

For feed-in tariff (FIT) complaints, the Energy Ombudsman can consider complaints where obligated electricity suppliers do not follow the rules set by Ofgem²³. FIT licensees are recommended to remind FIT generators to provide a meter reading once a quarter²⁴.

If a supplier goes out of business, there are specific protections. Ofgem has published guidance on what happens if your energy supplier goes out of business¹⁹. This is relevant to meter reading because a new supplier will need to establish accurate readings, and any outstanding balance or credit is handled through the supplier of last resort process.

Why accurate meter readings matter when the price cap changes

The price cap is revised each quarter⁶. Ofgem adjusts the level of the cap up or down twice a year to reflect the costs of supplying electricity and gas for supply²⁵. The Smart Metering Net Cost Change allowance is updated as part of the six-monthly price cap updates²⁶.

When the cap changes, your bill changes. If your meter readings are estimated, the change may not be reflected accurately in what you are charged. The supplier must write to tell you if your tariff is changing in a way that could disadvantage you, or if the tariff you are on is no longer available²⁷.

The current cap, from 1 October 2026, is £1,723 a year for a typical household, a 4% increase from £1,663⁶. Electricity is 26.32p per kWh and gas is 7.97p per kWh⁶. These figures apply to households on variable tariffs.

Switching supplier also depends on accurate readings. In one in every ten switches there are problems with the change of supplier meter read that suppliers have to fix²⁸. This is an older figure from 2014, but it illustrates why readings matter at the point of switching.

For households on smart meters, the automatic reading process reduces the risk of estimation error. For those on traditional meters, submitting a reading before and after a price cap change is the most reliable way to ensure the correct rate is applied to the correct consumption.

Where to get help: Ofgem's enquiry service and signposting

Ofgem's role in consumer help is primarily signposting and market monitoring rather than individual casework. For Energy Company Obligation (ECO) queries, Ofgem publishes a contact details page for obligated suppliers²⁹. This is a specific route for ECO-related questions, not for general billing disputes.

For general complaints, the Energy Ombudsman is the correct route. It is an independent service, separate to Ofgem, for problems with an energy supplier, an energy broker, a network operator or a heat network supplier²².

Ofgem also commissions research on consumer experience. The Energy Consumer Satisfaction Survey is commissioned by Ofgem and Citizens Advice¹⁸. Suppliers are required by Ofgem's rules to publish their performance in the Citizens Advice Star Rating²⁰. This gives households a way to see how suppliers compare on customer service.

For households struggling with bills, Ofgem's rules mean suppliers must work with you to set up a payment plan you can afford⁷. Ofgem rules also protect customers in debt where a supplier wants to install a prepayment meter⁹. These protections apply regardless of meter type.

If you have a smart meter and suspect an issue, the supplier must promptly investigate and keep you informed¹. If you have a traditional meter and want a reading taken, most suppliers will send a meter reader on a regular basis if you make them aware of your circumstances².