Ofgem: What the Energy Regulator Does and What It Covers

Ofgem is Great Britain's independent energy regulator¹. It performs the day-to-day functions of the Gas and Electricity Markets Authority, the statutory body established in law, and it oversees the companies that sell you gas and electricity, the networks that carry it, and, since January 2026, the heat networks that warm a growing number of flats and estates². It also runs twelve schemes on behalf of the UK government and the devolved administrations, from the Energy Company Obligation to the Boiler Upgrade Scheme⁴.

What it does not do is handle your complaint, set the wholesale price of energy, or intervene in individual disputes between a household and a supplier⁵. Understanding where its power starts and stops is the key to knowing who to turn to, and this page sets out both sides: the objectives, the price cap, the enforcement powers, the schemes, and the limits.

Three objectives: consumers, net zero and growth

Ofgem's work is anchored in objectives set by Parliament, and those objectives have recently changed. A government review of the regulator concluded that a new set of three equal principal objectives will be introduced, focusing on the interests of existing and future consumers, net zero and growth⁷. This puts environmental and economic aims on the same footing as consumer protection, rather than treating them as secondary.

The underlying statutory objective is broader than many people realise. Ofgem's duty is "to protect the interests of existing and future consumers, including consumers' interests in: the net zero 2050 target" and the security of supply of gas and electricity¹. In other words, when Ofgem weighs a decision about network investment or supplier rules, the interests of future consumers and the country's carbon targets are part of the calculation, not an afterthought.

For households, this shows up in practical ways. Ofgem's debt strategy work includes ensuring accurate bills and direct debits, reducing the occurrence of shock bills, and ensuring customers who want a smart meter can receive one quickly¹¹. The strategy has four components: resetting debt through a proposed Debt Relief Scheme, reforming how suppliers manage debt by increasing Debt Standards, helping to prevent debt from occurring by looking at billing and access to credit, and energy affordability support¹². The government has argued that backing the proposed debt strategy will cut consumers' energy bills by reducing the cost of paying for energy debt¹³.

The independence lens matters here. Ofgem's net zero objective shapes the rules under which homes can install low-carbon heating and export electricity, but the regulator does not fund installations from its own budget: the schemes it administers are government policy, paid for through bills and taxation, and Ofgem is the administrator rather than the decision-maker.

Who Ofgem is: a statutory authority, not a government department

Ofgem is not a company and not a government department. It is the working name for the body that performs the day-to-day functions of the Gas and Electricity Markets Authority (GEMA), the statutory body responsible for administering schemes such as the Domestic Renewable Heat Incentive in Great Britain². The Authority is the legal entity; Ofgem is how it presents itself to the world.

Its independence from the companies it regulates is structural. Ofgem is Great Britain's independent energy regulator¹, and its relationship with government is one of arm's-length administration. The pattern is visible across its schemes: although Ofgem is the appointed administrator of the Energy Company Obligation, the Department for Energy Security and Net Zero sets the overall policy¹⁴. The same division appears in heat networks, where the Department works with Ofgem to ensure that, as regulation matures, heat network customers receive similar levels of protection to customers on other types of heating¹⁵. DESNZ sets the policy; Ofgem runs it.

That division of labour also means Ofgem is periodically reviewed by government. A call for evidence as part of the DESNZ Review of Ofgem also examined the Energy Ombudsman, the complaints body Ofgem approves¹⁶, and the review's final report set the direction for the new three objectives described above⁷.

For a household thinking about energy independence, the important point is accountability: policy questions about what support exists go to government and Parliament, while questions about how a scheme is run, audited and enforced go to Ofgem.

What Ofgem covers: suppliers, networks and, since 2026, heat networks

Ofgem's monitoring role covers the licensed businesses a household deals with directly and the networks that deliver energy to the door. It monitors energy suppliers and network operators closely to make sure they meet the rules set out in licences, regulations and law, provide good customer service, and reply quickly to customers who contact them⁵.

The list of what it oversees has grown. The Energy Act 2023 named Ofgem as the regulator for heat networks in England, Scotland, and Wales, and from January 2026 Ofgem began regulating heat networks³. On 27 January 2026, Ofgem's formal role as regulator of heat networks began, with the initial set of rules in place¹⁷. From that date, all heat networks are regulated by Ofgem and must register with its service¹⁹. The government has said heat network customers will be shielded from unfair price hikes, with Ofgem able to act on unfair price hikes and poor service²⁰.

The heat network regime is deliberately light-touch at first. Ofgem has not set prescriptive, minimum standards for how the Standards of Conduct should be achieved, in order to keep a flexible, principles-based framework, and it has not set prescriptive rules on how information should be shared, reflecting the diversity of the sector²¹. It has also decided it would not currently be suitable to implement prescriptive targets or key performance indicators for authorised persons' resolution of complaints, though it may explore complaint resolution requirements through future consultations on the guaranteed standards of performance for heat networks²¹. Ofgem says it wants to support operators and suppliers to comply over time, including with guidance and a fair and pragmatic compliance approach²².

Two boundaries are worth noting. Northern Ireland is outside Ofgem's remit entirely: energy there is regulated separately, as covered on our page about the Utility Regulator. And before January 2026, households on heat networks sat in a regulatory gap: they were not covered by Ofgem, with gas supply to a network regulated as a commercial supply but heat supply to homes not regulated at all²³.

Quarterly price caps introduced in summer 2022

The default tariff cap is the Ofgem decision most households actually feel. Ofgem introduced the default tariff cap on 1 January 2019⁸. It limits the unit rates and standing charges a supplier can charge on default tariffs, which is where most households that have never switched sit, and on prepayment tariffs.

How often it changes has changed itself. The cap is currently revised each quarter²⁴, and Ofgem reviews and sets the price cap every three months based on the cost of wholesale energy⁶. But that quarterly cycle is relatively new: in summer 2022, Ofgem moved from setting the cap every six months to every quarter in response to high and volatile wholesale prices⁸. Earlier descriptions of the cap as reviewed twice a year²⁵ reflect the pre-2022 arrangement, and the two accounts differ because the frequency genuinely changed at that point. The current position is quarterly.

The cap is a limit, not a target and not a price set by the state. Ofgem does not dictate the wholesale price of gas and electricity; it calculates what a typical efficient supplier would need to charge, given wholesale costs, network charges and policy costs, and caps default tariffs at that level. When wholesale costs fall, the cap falls; when they rise, it rises. Households on fixed deals are not capped, because they have contracted away from the default tariff.

For the full mechanics of how the cap is calculated, see our page on the energy price cap. In independence terms, the cap protects a household from the worst of supplier pricing on default tariffs, but it does not insulate anyone from wholesale market movements, which is why generation and storage at home remain the only true hedge against price volatility.

Enforcement: monitoring, investigations and penalties

Ofgem's monitoring is continuous, and it escalates when rules are broken. It monitors energy suppliers and network operators to make sure they meet the rules set out in licences, regulations and law⁵, and if it thinks a supplier or network operator has not met certain rules, it will start an investigation⁵.

Its formal enforcement powers include opening investigations, making orders and imposing penalties in response to non-compliance and suspected non-compliance⁴. Enforcement is not reserved for the worst cases alone, but Ofgem has set out the triggers that push it to act: it will pursue enforcement action where there is serious harm that requires a strong deterrent signal, a consistent pattern of poor conduct, or where companies refuse to cooperate¹².

The same seriousness extends to the schemes it administers. On Feed-in Tariffs, Ofgem states that it takes compliance with scheme rules extremely seriously and investigates matters where there are concerns with supplier performance or generator compliance, taking action where necessary²⁶. Its audit activity gives that statement teeth: in Scheme Year 11 of the Domestic Renewable Heat Incentive, a total of 1,199 audits were conducted, made up of 621 desk audits and 578 site audits². Statistical audits are randomly selected to provide a representative view of the scheme population at a 90% confidence level². Where incorrect payments are made, Ofgem pursues recovery, with the recovery rate rising from 85.3% of incorrect payments in Scheme Year 10 to 89.8% in Scheme Year 11².

For a household, the practical significance is this: Ofgem's enforcement protects the market as a whole, and its audits are what stand between a grant scheme and widespread poor installation work. It is not a route for an individual household to obtain redress, which is dealt with elsewhere on this page.

Where the regulator stops: complaints and individual cases

This is the boundary most households trip over. Ofgem does not directly get involved with complaints about energy suppliers or network operators, and this includes heat network suppliers and operators; nor does it investigate individual disputes⁵. Its own consumer guidance is unambiguous on the point, and the position extends to the new heat network regime: generally, Ofgem does not intervene in individual disputes between consumers and energy businesses, including heat suppliers and operators²¹.

The route for a household with a problem is the company first, then an independent redress scheme. The Energy Ombudsman is approved by Ofgem to handle service disputes in the energy sector¹⁹. Complaints go to the supplier or network operator, and if the complaint is unresolved after eight weeks or reaches deadlock, the Ombudsman can take it on. Our page on energy complaints and redress walks through the process in detail.

Ofgem's role in complaints is systemic rather than personal. It sets the rules companies must follow, monitors whether they provide good customer service and reply quickly¹¹, and uses what it sees across the market to drive enforcement and rule changes. A single household's complaint will not be investigated by Ofgem, but patterns of complaints feed into the investigations and penalties described above.

The schemes Ofgem administers for government

Beyond regulation, Ofgem is a major scheme administrator. It administers 12 schemes on behalf of the UK government and the devolved administrations⁴, and the scale of this work is easy to underestimate: several of the grants and obligations households encounter in energy efficiency and low-carbon heating are run day-to-day by Ofgem, even though the policy belongs to government.

• Energy Company Obligation (ECO4). Ofgem is the administrator, setting targets for each obligated energy supplier, ensuring compliance, and monitoring their progress towards these targets¹⁴. Its obligations include calculating energy suppliers' obligations and tracking performance against them²⁷.
• Great British Insulation Scheme (GBIS). Ofgem administers the scheme and provides oversight and administration for local authority participation, including sending suppliers an annual sample of measures they have notified during the year²⁸. Where Ofgem identifies that local authorities have not carried out adequate due diligence checks, it will include this in the report²⁸.
• Feed-in Tariffs (FIT). Ofgem fulfils multiple functions as scheme administrator, including overseeing the accreditation process, and conducts annual audit programmes to ensure suppliers and generators comply with the scheme requirements²⁶.
• Domestic Renewable Heat Incentive (DRHI). The Gas and Electricity Markets Authority is the statutory body responsible for administering the scheme in Great Britain, with Ofgem performing its day-to-day functions².
• Boiler Upgrade Scheme (BUS). Ofgem runs the enquiry service and the application process, though it cannot provide pre-approval or confirm eligibility before a full application is submitted by the installer²⁹.

The audit regime behind these schemes is what protects households from poor work. Ofgem commissioned a randomised sample of audits of solid wall insulation installed under ECO4 and GBIS to understand the extent of problems³⁰, and the results feed back into scheme rules and enforcement. For a household, the message is that a grant is only as good as its policing, and Ofgem is the policing body for these schemes.

When a supplier fails: the Supplier of Last Resort

Supplier failure is the scenario where Ofgem's role becomes most visible to individual households. When an energy supplier ceases trading, to prevent a drop in service to customers, Ofgem will appoint another supplier to provide their energy supply¹⁹. This is the Supplier of Last Resort process, and it has been used many times in the British retail market.

The protections are practical rather than dramatic. Your supply of gas and electricity does not stop, because the physical network is separate from the company that sells you energy. The appointed supplier takes on the customers, and those customers are typically placed on a deemed contract, a default arrangement until they agree a new tariff or switch away. Deemed contracts have their own rules, covered in the next section.

Households that were in credit with the failed supplier are owed that money back, and claims are made to the failed company or its administrator. Our page on supplier licensing and supplier failure covers the process in full, including what happens to credit balances and direct debits.

The independence angle is worth stating plainly: the Supplier of Last Resort system is one of the strongest consumer protections in the British market, and it exists because Ofgem licenses suppliers and can direct the process when a licence holder fails. A household generating and storing its own electricity is less exposed to the commercial failure of any single supplier, but no home is fully independent of the retail market, because standing charges and network costs still apply.

Deemed contracts, back billing and standing charges explained

Three sets of rules in Ofgem's remit reach directly into household bills and accounts.

Standing charges. Reform of standing charges is on the regulator's agenda. The Energy Ombudsman, responding to Ofgem's Forward Work Programme consultation, stated its support for Ofgem's plans to look at how it regulates pricing, including reforms to standing charges and taking steps on debt and affordability¹⁶. Standing charges are the fixed daily element of a bill, paid regardless of how much energy is used, and they are set through the price cap for default tariffs.

Back billing. Ofgem's back billing rules protect households from old demands. The rules mean you do not have to pay for energy you used more than 12 months ago if you have not had an accurate bill, a statement of account, or had a Direct Debit set too low¹⁰. This applies where the supplier, not the customer, is at fault for the missing billing.

Deemed contracts. If you are on a deemed rate, typically after a supplier fails or after moving into a property without agreeing a tariff, the terms of deemed rate contracts should not be "unduly onerous"³¹. Suppliers can ensure contracts are not unduly onerous by making sure the profit derived from deemed rate customers is not significantly higher than the profit derived from contracted customers³¹.

How to get in touch with Ofgem and the information required

Ofgem can be contacted directly, though for most household problems the answer is the supplier first and the Energy Ombudsman second. For scheme enquiries, the Boiler Upgrade Scheme guidance gives a telephone number, 0330 053 2006, and an email address, BUS.Enquiry@ofgem.gov.uk²⁹.

What Ofgem will and will not do in response is clearly bounded. It cannot provide pre-approval or confirm eligibility for a grant before a full application is submitted by the installer²⁹. Where consent to a grant application is being confirmed, Ofgem will verify the identity of the individual confirming consent, and for properties owned by an organisation, it will verify the authority of the individual via Companies House³².

Households receiving letters connected to Ofgem's schemes can expect audit activity behind them: Ofgem commissions randomised statistical audits of installed measures³⁰ and conducts both desk and site audits of scheme installations². A letter about insulation installed under ECO4 or GBIS may therefore be genuine, but the standard checks apply: Ofgem verifies identity rather than demanding money, and its contact details are published so any approach can be checked against them²⁹.

Finally, Ofgem's own rulebook is not static. Its forward commitments include setting out immediate priority steps for adapting its regulatory frameworks for clean flexibility innovation by the end of 2026, consulting on informed decision making for electricity supply licence holders by the end of 2026, reporting on its review into distribution system operators' use of flexibility by autumn 2026, and finalising decisions on the first window of the Long Duration Electricity Storage Cap and Floor by autumn 2026³³. Its price controls have also introduced requirements for distribution and transmission companies to submit climate resilience strategies as part of their business plans³⁴. For households, these are the decisions that will shape network charges and flexibility options in the years ahead, and they are all traceable back to the regulator described on this page.