Policy Costs and Levies on Energy Bills

Green levies and other policy costs are the charges on your energy bill that fund government schemes, from renewable power to fuel poverty support, and they are a smaller part of the bill than most people assume. Of the rise in energy bills since pre-crisis levels, higher wholesale prices account for 54%, network charges for 20% and green levies for 6%¹. In cash terms, green levies have added £18 to bills since 2021, against £65 from other sources¹.

Every domestic bill is built from the same parts: wholesale energy costs, network costs, operating and debt costs, policy costs, the supplier's margin and VAT at 5%². Policy costs are the slice that funds environmental and social schemes, and they are collected from all bill payers whether or not a household benefits directly. The largest of these schemes reaching households directly is the Warm Home Discount, a £150 rebate off winter electricity bills that now reaches around 6 million households⁴.

Which parts of your bill are policy costs, and where they appear

A policy cost is any charge recovered through energy bills to fund a scheme the government has created. Ofgem sets out the components used to calculate bills: wholesale costs, network costs, operating and debt costs, policy costs, the supplier's earnings before interest and tax, and VAT at 5%, with the final figure also shaped by the type of energy used, the meter installed and how the bill is paid². Policy costs sit inside that structure, and under the price cap they are an allowance the supplier recovers from customers rather than a separate line every household sees.

The scale matters for perspective. Green levies explain only a small fraction of why bills are higher than they were before the energy crisis: of the total rise, 54% comes from wholesale prices, 20% from network charges and 6% from green levies¹. Since 2021 the levy slice has added £18 to a bill, while £65 has come from other sources¹. That does not make the charges invisible. Because they are spread across every household's bill, they are regressive: a low-income household pays the same levy allowance as a high-income one, which is one reason the government has begun moving some of these costs off bills and onto general taxation⁴.

For a fuller breakdown of where each pound goes, see what makes up a UK energy bill and standing charges on energy bills.

Key charges households pay, and the money they raise

Several schemes are funded through domestic bills, and each works differently. The Warm Home Discount is funded through a levy on all domestic gas and electricity customers, and primarily provides £150 energy bill rebates⁵. The Energy Company Obligation, which funds home insulation and heating improvements, is likewise funded through a levy on energy bills⁷. The Renewables Obligation supports accredited renewable generators, the Green Gas Levy supports biomethane production, and the Capacity Market pays power plant operators to guarantee future electricity supply⁴.

Two features are common to all of them. First, the costs are socialised: every bill payer contributes, whether or not they benefit. Second, the amount a household pays is not itemised on most bills, because under the price cap it is built into the allowed standing charge and unit rates². How a household pays its bill also shapes the total: the cap's allowances differ by payment method, meter type and fuel, which is why the same levy can cost different households different amounts².

Renewables Obligation: moving off bills towards taxation

The Renewables Obligation is the legacy scheme that required suppliers to source a rising share of electricity from accredited renewable generators, with the cost recovered through bills. It remains one of the heaviest policy costs on electricity, and its scale is visible in the government's own accounting of decarbonisation: renewables obligations, feed-in tariffs and the climate change levy collectively accounted for about 10% of industrial users' electricity bills¹. Domestic bills carry the same schemes at a smaller scale.

The direction of travel is now firmly towards taxation. The government has confirmed the introduction of the Renewables Obligation to Exchequer Scheme, which moves the cost of the scheme off energy bills and onto general government funding⁸. This is the single biggest planned change to the policy cost slice of a bill, and it follows the same logic as earlier decisions to fund fuel poverty support differently: bills are a blunt instrument for paying for national infrastructure, because the burden falls hardest on those who can least afford it.

The scheme's administration also shows how levy costs are settled behind the scenes. Suppliers report estimated electricity supply figures for the preceding obligation period by 1 June and final figures by 1 July, and their obligations are reconciled against what they actually supplied¹¹. That reconciliation matters because it determines how much of the levy each supplier passes through to customers in the following cap period.

Green Gas Levy and Capacity Market: two modest fees pulling opposite ways

The Green Gas Levy is the newest and smallest of the bill charges, but it is rising. It funds the Green Gas Support Scheme, which pays biomethane producers to inject green gas into the grid. Ofgem allows its recovery on a per gas meter basis, allocated to the standing charge even at nil consumption⁹, and the allowance in the price cap rose by £3 for the period 1 April to 30 June 2025¹². At the peak of the levy in 2028, gas customers could see their annual bills rise by approximately £4.70, assuming a transition to a volumetric levy in the future⁹. The levy rate is reviewed and published annually, and it may either increase or decrease⁹.

The Capacity Market works differently: it is not an environmental levy but a security-of-supply scheme. Its stated purpose is to ensure the security of Great Britain's electricity supply at least cost to consumers, and it is technology neutral¹⁰. The scale is substantial: £1.25 billion was paid out to Capacity Market agreement holders for the 2024/25 delivery year¹⁰. Recent auctions have secured 40.1GW in the main auction, with 50.2GW secured in earlier auctions and 7.2GW in the one-year-ahead auction⁴, alongside 2.6GW and 0.7GW of derated capacity securing agreements in the last T4 and T1 auctions¹³.

There is a structural criticism that bears on every household bill. Most of the regulated social and environmental levies are made on electricity rather than gas, which increases electricity's relative price, and a 2021 report for the Scottish Government recommended urgent rebalancing of these costs by the UK Government and Ofgem¹⁴. Until that rebalancing happens, households pay the bulk of policy costs on their electricity bill, which raises the cost of running a home on electricity relative to gas.

Warm Home Discount: electricity bills cut by £150 for some 6 million homes

The Warm Home Discount is the policy cost most households actually feel, because it arrives as money off. It is a fuel poverty reduction scheme, reducing the energy costs of low-income and vulnerable households across Great Britain, and it primarily provides support through £150 energy bill rebates funded through a levy on all domestic gas and electricity customers⁵. Around 6 million households now benefit from the £150 rebate off their winter energy bill⁴.

The scheme has grown substantially. For winter 2025/26, 2.7 million extra households received £150 off their energy bills compared with earlier years¹⁵, taking the total to around 6 million⁴. That is a long way from the scheme's earlier form, when it was a £140 one-off payment supporting two and a half million low-income and vulnerable households at a cost of £350 million per year¹⁶. The Energy White Paper had proposed extending it to 2025/26 and expanding it to £475 million, reaching three million households¹⁶; the expansion has since gone further.

The scheme covers England, Scotland and Wales and will run until 31 March 2031⁵, with the government confirming its continuation until 2030-31⁴. Northern Ireland is separate: it has its own energy market and its own arrangements, covered in energy bills in Northern Ireland.

Eligibility rules, and who must claim the rebate themselves

Eligibility rests on three conditions, all of which must be met on a single qualifying date each year. Your energy supplier must be part of the scheme, you or your partner must receive certain means-tested benefits, and your name or your partner's must be on the electricity bill¹⁷. For winter 2025/26 the qualifying date was 24 August 2025¹⁹. Qualifying benefits include means-tested benefits and Housing Benefit¹⁷. Large domestic energy suppliers are obligated to provide the annual £150 discount to eligible households²⁰, so households with the big suppliers are covered automatically by the obligation.

For most households there is nothing to apply for. Through data matching between government records and supplier accounts, the majority of eligible households receive their rebates automatically from their energy supplier²¹. The scheme also covers an annex with its own electricity supply where the resident receives a qualifying benefit and is named on the bill²¹.

The main exception is park homes. Residents who pay the site owner for their electricity cannot be reached through standard data matching, so the Park Homes Warm Home Discount Scheme requires an application each year, and only one application per household is considered¹⁹. To be eligible, an applicant must be a permanent resident of a park home, pay the park site owner for electricity usage, and be on a relevant qualifying benefit or meet household income or fuel poverty criteria²¹. Ofgem's guidance for households in alternative housing arrangements confirms the same route: if you live in a park home and pay your site owner for your energy, you could qualify through the dedicated scheme²².

To check eligibility, a household needs the name of its electricity supplier, details of any benefits received, and the size and age of the property, including whether it has an energy performance certificate²³. Scotland has its own eligibility page for the scheme, covering winter 2026 to 2027¹⁸.

The payment route for the discount, and its timing on your bill

The mechanics are simple and worth understanding, because the money never reaches the household directly. Your electricity supplier applies the discount to your bill; the money is not paid to you¹⁸. It is paid by the supplier as a discount on the bill²³, so it appears as a credit on the electricity account rather than as a bank payment.

The timing runs across the winter. The discount is applied to eligible customers' electricity bills between October and April¹⁶. In the scheme's earlier £140 form, discounts were taken automatically from energy bills before the end of March, with most pensioners receiving their discounts between October and January²⁴. The same pattern holds today: most automatic awards land on bills across the winter months, and the supplier must have applied the discount by the end of the scheme year.

Because the rebate is a bill credit rather than a payment, a household on a prepayment meter receives it differently from a direct debit customer, typically as a credit applied to the meter or account. The underlying rules are the same across payment methods, but the practical experience differs, which is covered in prepayment meters.

Standing charge versus unit rate collection: why the difference counts

Where a levy sits on the bill changes who pays what. A charge allocated to the standing charge is fixed: every household with a meter pays the same regardless of how much energy it uses, and the Green Gas Levy is recovered this way, on a per gas meter basis through the standing charge even at nil consumption⁹. A charge recovered through the unit rate scales with usage, so a low-consumption household pays less of it.

The Warm Home Discount is now changing position. The government has decided to shift the recovery of Warm Home Discount costs from the standing charge to the unit rate from April 2026⁴. The government's position is that energy suppliers should recover Warm Home Discount costs from the unit rate for electricity and gas, and the supplier reconciliation process will be updated so that obligations are settled against actual energy volumes supplied²⁵. In practice this means the levy that funds the discount will track how much energy a household uses rather than being a flat daily charge.

The change is part of the wider debate over standing charge reform. A fixed daily charge hits low-use households hardest, including those who have invested in efficiency or self-generation, because they pay the same levy as heavy users. Moving costs to the unit rate reverses that: households that use less energy, whether through insulation, solar panels or simply careful use, will carry a smaller share of the levy. The trade-off is that high-consumption households, which include some of the most vulnerable because of medical equipment or poorly insulated homes, will carry more.

For households that pay a landlord or site owner for energy, the rules on what can be charged are explicit: residents can only be charged for energy at the unit rate agreed in their tenancy, licence or occupancy agreement²².

Future levy changes: the key dates affecting your costs

The policy cost slice of the bill is not static, and several dated changes are already confirmed.

• April 2026: Warm Home Discount costs shift from the standing charge to the unit rate⁴.
• 2026: The Renewables Obligation to Exchequer Scheme takes effect, moving RO costs off bills and onto general taxation⁸.
• 1 April to 30 June 2025: The Green Gas Levy allowance in the price cap rose by £3¹².
• 2028: The Green Gas Levy reaches its peak, at approximately £4.70 a year on gas bills, assuming a transition to a volumetric levy⁹.
• 31 March 2031: The Warm Home Discount scheme in England, Scotland and Wales closes, with continuation confirmed through to 2030-31⁴.

The Green Gas Levy rate is reviewed annually and may rise or fall when published⁹, so its trajectory beyond the 2028 peak is not fixed. The Renewables Obligation change is the one with the largest effect on the electricity unit rate, because it removes the biggest legacy environmental cost from bills altogether⁸. Whether the saving reaches households in full depends on how the price cap treats the removed cost at the next reset.

How these charges shape a home's energy self sufficiency

Policy costs are one of the charges a household cannot escape by generating its own power, and that is worth stating plainly. A home with solar panels and a battery still pays the standing charge, and a levy allocated per gas meter is charged even at nil consumption⁹. The Energy Company Obligation, which funds insulation and heating upgrades, was funded by a levy on household energy bills, with the government setting the overall scheme targets and rules²⁶. The Warm Home Discount is funded by a levy on all domestic gas and electricity customers⁵. Self-generation reduces the unit-rate portion of these costs where they are volumetric, but the per-meter charges remain.

The direction of policy is nonetheless favourable to independence. Moving the Renewables Obligation to Exchequer funding⁸ and shifting Warm Home Discount recovery to the unit rate⁴ both reduce the fixed costs that penalise low-consumption homes. The longer-standing imbalance, with most levies loaded onto electricity rather than gas¹⁴, has made electric heating look expensive relative to gas, and rebalancing it would change the economics of heat pumps and other electric heating. For a household weighing investment in insulation, solar or a heat pump, the structure of the levies matters almost as much as the unit rate itself, which is explored in energy bills and energy independence.

The remaining dependence is unavoidable: as long as these schemes are funded through bills, a household's policy costs are set by government decisions and cap resets, not by anything the household controls. The dates above are the moments when that balance shifts.