UK energy retailers are owed £4.6bn in unpaid household bills, according to regulator Ofgem, up from roughly £1bn at the start of 2018. The mounting debt stems from rising energy costs and household financial strain. With the Iran conflict set to push gas and electricity prices higher in July, the situation threatens to worsen significantly. These unpaid bills ultimately impact all consumers through the price cap mechanism, which spreads debt-related costs across everyone's bills.

Financial hardship drives much of this crisis. Consultancy Baringa estimates one in four households in energy debt lives at or below subsistence living levels, while a further two-thirds are considered vulnerable. Ofgem has proposed writing off approximately £500mn owed by those who genuinely cannot pay, adding the cost to everyone else's bills. The price cap already factors in debt-related costs, meaning all customers bear the burden of non-payment.

Addressing the problem requires multiple approaches. Implementing a long-term social tariff could protect vulnerable households, while requiring pre-payment meters for new occupants when moving house would help recover roughly one-third of outstanding debt. However, solving the underlying affordability crisis remains fundamentally a government responsibility rather than an energy sector issue.