The typical UK household paid £1,568 for electricity in 2024, roughly 50% more than the average across the European Union. That gap is not an accident of geography or fuel mix. It is a direct consequence of how Britain structures its electricity market, how it pays for grid upgrades, and how it funds social and environmental programmes.
A new briefing from the House of Lords Library, published in March 2025, lays out the anatomy of the British electricity bill in forensic detail. As reported by the House of Lords Library, the average unit price for electricity in Great Britain stood at 24.5p per kWh in late 2024, more than double the 10p per kWh paid by French households. Understanding why that is matters for every homeowner considering a heat pump, solar panels, or even just a tariff switch.
What makes up the price
The wholesale cost of electricity, the price generators charge suppliers, accounts for only about 40% of the final bill. The rest is a stack of regulated charges and taxes. Network costs, which cover the transmission and distribution cables that bring power to your home, make up roughly 25% of the total. For a typical 3-bed semi using 2,900 kWh of electricity a year, that means around £380 goes to grid operators before a single light is switched on.
Policy levies, the charges that fund renewable subsidies, the Warm Home Discount, and social programmes, add another 15%. VAT at 5% and supplier operating costs account for the remainder. The result is a bill where the actual commodity, the electrons themselves, is less than half the price.
Why network costs are rising
Ofgem approved a £22 billion investment programme for electricity networks in the five years to 2028. That money will reinforce cables, build new substations, and connect offshore wind farms. It will also appear on household bills. The regulator estimates that network charges will add roughly £24 a year to the average electricity bill over the period.
The catch is that these upgrades are essential. Without them, the grid cannot handle the surge in heat pumps and electric vehicles that the government’s net-zero strategy requires. Homeowners are paying for the transition before they see the benefit. The House of Lords Library notes that network costs in Britain are already among the highest in Europe, partly because the grid was built for a centralised fossil-fuel system and must now be rewired for a decentralised, renewable one.
Who qualifies, and who doesn’t
The briefing also highlights a structural oddity: policy levies are loaded onto electricity bills, not gas bills. That means homes using electric heating, including heat pumps, pay a disproportionate share of the costs of decarbonisation. The Energy Systems Catapult has estimated that shifting these levies off electricity and onto general taxation could cut the running cost of a heat pump by 15% to 20%.
Successive governments have promised to review this ‘levy imbalance’ but have not acted. The result is that a household switching from a gas boiler to a heat pump today pays more in policy charges per unit of energy than it did when burning fossil gas. That is a perverse incentive, and the Lords Library briefing makes it clear that the problem is political, not technical.
For homeowners, the immediate action is to reduce the total number of kWh they buy from the grid. Insulation, draught-proofing, and efficient appliances cut consumption. Solar panels and battery storage allow households to generate their own electricity and avoid the network and policy charges entirely on the units they self-consume. The payback period for a typical 4 kW solar system is now 7 to 10 years, depending on location and orientation.
Tariff shopping also matters. The price cap sets a maximum, not a floor. Fixing a deal for 12 months at 22p per kWh rather than the cap’s 24.5p saves about £70 a year on a typical electricity bill. That is not life-changing, but it is money that could go into a cavity-wall insulation grant or a smart thermostat.
The House of Lords Library has done the service of showing exactly where the money goes. The next step, for policymakers and for homeowners, is to decide which parts of that stack are worth paying for, and which can be avoided.
Frequently Asked Questions
France generates most of its electricity from nuclear power, which has low marginal costs, and its network charges are lower. The UK relies heavily on gas for generation, which raises wholesale prices, and its grid investment and policy levies add significant costs to every kWh.
Yes. Switching to a fixed-rate tariff below the price cap, improving home insulation, using timers to shift usage to off-peak hours (if on a time-of-use tariff), and replacing old appliances with A-rated models can all cut consumption and costs.
