Your Energy Bills Are About to Get £332 Heavier. Yes, Again.

Just When You Thought It Was Safe to Turn the Heating Back On

Remember that brief moment of relief when energy bills actually dropped in April? Savour it, because it was apparently just the universe lulling you into a false sense of financial security. According to the latest forecast from Cornwall Insight, published on 20 March 2026, the Ofgem price cap for July to September 2026 is now projected at a thoroughly unwelcome £1,973 per year for a typical dual-fuel household.

That is a £332 annual increase on the current April cap of £1,641. A 20% jump, in case you fancied the maths spelled out. To put that in perspective, the April cap itself was supposed to be the good news: a 7% reduction, saving households roughly £117 compared to the first quarter of this year. That saving now looks like pocket change next to what is heading our way in the summer.

Three Forecasts in Three Weeks, Each Worse Than the Last

What makes this particularly grim is the speed at which Cornwall Insight has been revising its numbers upward. On 4 March, they forecast a roughly 10% increase, putting the cap at around £1,801. By 13 March, that had crept up to about £1,827, an 11% rise. Now, just a week later, we are staring down a 20% hike to £1,973.

Three revisions in a single month is not normal. It tells you something about how rapidly the situation is deteriorating on the wholesale markets. And crucially, these are still forecasts. Ofgem will not confirm the actual July cap until late May or early June. The way things are going, there is every chance the number could climb further before then.

Why Is This Happening? The Middle East, Naturally

The driving force behind this surge is the conflict in the Middle East, specifically the US-Israeli war on Iran, which has thrown global energy supply chains into chaos. Wholesale gas prices have climbed a staggering 75% in just 30 days, with a 60% spike occurring in a two-week window alone. UK natural gas prices hit levels not seen since January 2023.

The Strait of Hormuz, through which roughly 20% of the world's oil and gas passes, sits right in the middle of the crisis zone. Qatar, a major supplier of liquefied natural gas (LNG) to Europe, has been directly affected. QatarEnergy halted LNG production at two of its main facilities on 2 March and declared force majeure on 4 March. Shell has also reported damage to a gas plant in Qatar.

Martin Lewis, the nation's unofficial minister for personal finance, described the gas price movement as 'probably the biggest percentage rise we have ever seen in two days.' That is not the kind of record anyone wants broken.

The Numbers That Should Worry You

Let us lay out the key figures:

• April 2026 price cap: £1,641/year (a 7% drop from Q1's £1,758)

• July 2026 forecast: £1,973/year (a 20% increase on April)

• Annual increase: £332 for a typical dual-fuel household

• Wholesale gas prices: Up 75% in 30 days

• Heating oil: Up 39% year-on-year (and not covered by the price cap)

That last point is worth lingering on. An estimated 1.5 million UK households rely on heating oil rather than mains gas. These homes, often in rural areas, get no protection whatsoever from the Ofgem cap. With heating oil prices surging 39% year-on-year according to the End Fuel Poverty Coalition, they are arguably in an even worse position than those on the gas grid.

Could It Get Even Worse?

Unfortunately, yes. Martin Lewis has warned that if wholesale prices remain elevated, bills could rise by as much as 30%. Financial analysts at Stifel have gone further, suggesting that if the conflict drags on, annual bills could reach £2,500 per year. That would take us uncomfortably close to the peak of the 2022 energy crisis, a period most of us would rather forget.

The Office for Budget Responsibility has also flagged the broader economic impact, warning that the energy spike from the Iran conflict could add a full percentage point to UK inflation during 2026. So it is not just your gas bill that is going up; the ripple effects will hit the weekly shop and just about everything else.

Is There Any Good News At All?

A sliver. The government is cutting policy levies from 1 April, which should save a typical household around £130 per year. That will soften the blow somewhat, but set against a £332 increase, it is the energy policy equivalent of putting a plaster on a broken leg.

There is also the fact that this remains a forecast, not a done deal. If the geopolitical situation de-escalates and wholesale prices come back down, the actual cap set by Ofgem in late May could be lower than £1,973. But betting on Middle East peace deals as a household budgeting strategy is, to put it mildly, optimistic.

What Can You Actually Do?

Martin Lewis has been urging consumers to look at fixing their energy tariffs now, with the blunt advice: 'Don't dawdle.' Energy suppliers are already repricing and withdrawing deals as the wholesale picture worsens. If you can lock in a rate close to or below the current cap, it might be worth doing before July arrives.

Beyond that, the usual unglamorous advice applies: check your insulation, bleed your radiators, consider whether you genuinely need every room heated to 21 degrees, and keep an eye on your smart meter if you have one. None of it is exciting. All of it helps.

The Bigger Picture

This episode exposes, yet again, the UK's structural vulnerability when it comes to energy. We have just eight operational gas storage facilities. North Sea production continues to decline. Gas-fired power stations still set the marginal price of electricity, which means even your supposedly green tariff gets dragged up when gas prices spike.

Energy bills remain roughly 35% above pre-2022 levels even after recent reductions. The idea that the energy crisis was 'over' was always more wishful thinking than reality. What we have had is a period of slightly less painful bills, and even that is now ending.

The honest truth is that until the UK reduces its dependency on imported gas, whether through renewables, nuclear, better storage, or some combination of all three, we will keep finding ourselves at the mercy of events thousands of miles away. A conflict in the Persian Gulf should not be able to dictate whether a pensioner in Peterborough can afford to heat their home. But here we are.

Keep an eye on the Ofgem announcement in late May. Until then, fix your tariff if the numbers work, insulate what you can, and brace yourself for a summer that might not feel very sunny when the bills land.

Read the original article at source.