Industry experts estimate the UK’s household energy debt surpassed £6 billion in the first half of 2026. More than three million customers are now in debt or arrears, with the average amount owed sitting at around £1,800. Forecasters predict the total will reach £7 billion by the end of the year.
The government is trying desperately to ease the pressure. From October 1st, VAT will be removed from household electricity bills, saving the average household around £45 a year. That will help, but the scale of the debt problem is so large that clearly more needs to be done. The UK needs to look beyond short-term relief and tackle the cost of energy itself.
In this article, we’ll dive deeper into the numbers and talk about the measures that could make a difference.
Energy debt keeps climbing
Household energy debt has doubled over the past three years. What’s more, around 75% of unpaid energy bills are in arrears, which means no repayment plan is in place for most of that money. For households already struggling to meet current bills, clearing debts of this size can become extremely difficult. Energy UK says some customers have little prospect of paying off their arrears while energy costs remain high.
The impact also spreads across the market. Suppliers recover bad debt through customer bills. It currently adds around £50 a year to a typical dual-fuel bill under the price cap. Standard credit customers pay around £140 through the debt allowance built into tariffs. If total debt reaches £7 billion, another £10 to £15 could be added to bills.
Suppliers feel the pressure too. The cost of bad debt threatens their financial stability and reduces the money available to improve customer service or help people lower their bills. Suppliers made a projected profit of just £5.31 per customer in 2025.
New government efforts
From October 1st, the government will cut VAT on household electricity bills from 5% to zero. Customers will not need to apply. Suppliers should stop automatically adding VAT, including for customers on fixed tariffs and prepayment meters. The government estimates an average saving of £45 a year. The exact amount will depend on electricity prices and household consumption.
This comes on top of other support measures that are in place:
- £150 of costs removed from household bills earlier in 2026
- £150 Warm Home Discount for around six million households
- Small businesses that already qualify for the reduced 5% electricity VAT rate will receive the 0% rate this winter
- Charities covered by the same reduced-rate rules will benefit too
- Residential care homes that qualify will also move to the 0% rate
The VAT cut has also limited the rise in Ofgem’s energy price cap, according to the government.
These measures reduce the amount customers have to pay. However, the VAT cut itself is currently funded only for the 2026 to 2027 financial year. Meanwhile, household energy debt continues to rise.
Longer-term solutions
There is a wider problem behind the pressure on bills. Britain remains dependent on expensive fossil fuels, even as cheaper renewable generation expands.
The marginal price of electricity is largely driven by the cost of the most expensive source required to meet demand. When expensive fossil-fuel generation sits at that margin, it pushes wholesale electricity prices higher. That exposure remains even when renewable electricity can be generated more cheaply. Reducing that dependence should be a national priority. Britain needs more renewable generation, with the infrastructure required to make full use of it. Connection is central to this. Building renewable capacity achieves little if that electricity cannot reach the grid properly. New generation needs full, effective connections so that cheaper sources can play a larger role in supplying the country.
This affects much more than household bills. High energy costs also hit businesses and restrict economic growth. The longer Britain remains exposed to expensive fossil fuels, the longer consumers and companies remain vulnerable to high wholesale prices.
Looking to the future
A £45 annual VAT saving will provide some breathing space. For households facing debts measured in thousands of pounds, the challenge is far larger. The £6 billion debt figure shows where persistently high energy costs have taken us. If current trends continue, another £1 billion could be added before the end of 2026.
Short-term support has a role. Britain also needs to reduce the underlying cost pressures feeding into bills. Increasing renewable generation and making sure it connects fully to the grid can reduce reliance on expensive fossil fuels. That is where the long-term priority should lie.