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Why UK Energy Bills Keep Rising and What You Can Do

Most people assume their energy bill went up because the supplier decided to charge more. The reality is more complicated. UK electricity prices are shaped by forces that sit well above your supplier's pricing team, and understanding them makes it a lot easier to figure out what you can actually do about it.

The Ofgem price cap for Q2 2026 puts the residential electricity rate at 24.67p per kWh. That’s the number on your bill for every unit you draw from the grid.

What Is Actually Driving the Price Up
The UK electricity market has long been exposed to wholesale gas prices, even if your home does not use gas at all. Under the UK's marginal pricing system, the most expensive generator operating at any given moment sets the price for all electricity on the grid.

Gas-fired power stations have historically fulfilled that role, though this is changing. Gas-fired plants still set the marginal electricity price the vast majority of the time. Gas was the price-setting fuel in around 97% of trading periods in 2021, and while the growth of renewables is beginning to weaken this link, gas remains the dominant price setter in 2026.

The difference is that cheaper, more efficient gas plants are now often the ones at the margin, which helps push wholesale prices lower even before gas loses its price-setting role altogether.

That structural link has been a recurring problem since the energy crisis of 2021 and 2022. Prices have come down from their worst levels, but the Q2 2026 average annual bill of £1,641 is still around 35% higher than in winter 2021/22.

Network Charges and Policy Costs Add to the Bill
Wholesale energy is only part of what you pay. Network charges cover the cost of maintaining the cables and infrastructure that deliver electricity to your home. These are unavoidable and have been rising as the grid is upgraded to handle more renewable generation and EV charging demand.

Policy costs are also bundled into your unit rate. These include levies that fund social programmes such as the Warm Home Discount and support for renewable energy generation.

It's worth noting that from April 2026, the government ended the Energy Company Obligation scheme and shifted 75% of the Renewables Obligation costs from bills to general taxation. Together, these changes reduced the average household bill by around £150 a year, though some policy costs, including the Warm Home Discount, remain on bills. Even so, the remaining policy costs still add a few pence per kWh before a supplier has factored in their own margin.

Why Switching Tariffs Only Goes So Far
Switching energy supplier is the advice most people hear first, and it can save money on standing charges or unit rates at the margins. However, all UK suppliers are drawing from the same wholesale market and paying the same network costs. The room to save by switching is much narrower than it was in the mid-2010s when the market was more competitive.

Time-of-use tariffs, such as Octopus Go or Agile, offer more meaningful savings if you can shift usage to off-peak hours. Running a dishwasher at midnight or charging an EV at 2am is genuinely cheaper. For daytime consumption, though, including cooking, lighting, and heating, you are still buying electricity at close to the peak rate.

Generate Your Own and Avoid the Rate Altogether
Every unit of electricity you generate and consume directly is a unit you do not buy at 24.67p. That is the core logic behind solar for homeowners, and it’s why the maths has improved significantly as retail electricity prices have risen. Choosing the best solar panels for your roof size and budget is the most impactful long-term step you can take to reduce what you pay per unit.

A typical 4kW system on a south-facing UK roof will generate somewhere in the region of 3,400 to 4,200 kWh per year, depending on your location, roof pitch, and panel quality, with systems in southern England tending toward the higher end of that range.

For a household that uses a reasonable share of that directly during the day, the savings against the current unit rate are significant. Add a battery and you can shift unused daytime generation into the evening, which reduces grid imports further.

Your Surplus Electricity Still Has Value
The Smart Export Guarantee pays you for surplus electricity you send back to the grid. Rates vary considerably by supplier and tariff type. As of mid-2026, the lowest widely available rates sit at around 3p per kWh, while the best tariffs can reach 25p per kWh or higher. These premium rates typically require you to import electricity from the same supplier and, in most cases, to have a battery and to have had your solar installed through that supplier.

SEG rates change regularly. Suppliers can adjust them with as little as 30 days' notice, so a rate that looks strong today may not last. Checking the market every 6 to 12 months is a good habit.

Self-Consumption Still Beats Export
The best open-market rate available to any solar household regardless of their import supplier is currently around 13p per kWh, with several other options above 8p. Shopping around for your export tariff is well worth doing, as the gap between the worst and best rates can mean hundreds of pounds a year.

That said, for most households, maximising self-consumption still makes more financial sense than maximising export. Shifting loads like washing machines, dishwashers, and EV charging to run during peak solar hours makes a real difference to how much of your own generation you actually capture.

In the End…
UK energy prices are unlikely to return to pre-2021 levels in any sustained way. Tariff switching will continue to offer limited marginal gains, but it will not change your unit rate in any fundamental way.

The households that will see their bills come down meaningfully are the ones that reduce how much grid electricity they need. For homeowners, solar is the most direct route to that.

 

This was posted in Bdaily's Members' News section by Helen White .