Ofgem Price Cap to Rise 13% in July as Gas Costs Dwarf Electricity Gains

Ofgem Price Cap to Rise 13% in July as Gas Costs Dwarf Electricity Gains Britain's July energy price cap will hit £1,850 annually, with gas bills climbing 24% while renewables limit electricity rises to 5%. Ofgem will raise the household energy price cap by around 13% from July, pushing a typical dual-fuel bill to £1,850 a year — up from £1,641 in the April quarter — with the increase driven almost entirely by gas costs in the aftermath of the Iran war.^7,3 The split within that figure is the more telling detail. Gas bills are rising by 24% while electricity bills increase by only around 5%, a divergence Ofgem attributed directly to the growing share of renewables in the generation mix. "This reflects the increase in the amount of renewable generation on the system and therefore reduced reliance on gas to generate our electricity," the regulator said.⁷ That gap matters for how traders and analysts read the longer-term UK energy picture. It is early evidence that the electricity system's exposure to gas price shocks is narrowing, even as wholesale commodity costs remain elevated. The mechanism is straightforward: when wind and solar displace gas-fired generation, the marginal cost of power decouples from NBP or the relevant European hub. Higher gas prices then land disproportionately on heating customers rather than spreading across the full bill.⁷ The Iran war premium is the proximate cause of this quarter's increase. Despite a ceasefire holding while negotiations continue, energy consultancy Cornwall Insight had already revised its July cap forecast upward — the £1,850 estimate is slightly higher than the 12% increase it projected the previous month, suggesting analysts have been chasing the commodity price move rather than getting ahead of it.^3,7 British Gas said wholesale energy costs account for roughly 50% of the total cost to supply a customer, and the firm said its own fixed-rate products had already been repriced to reflect the move. The retailer estimated the July cap would rise by about 9% — a more conservative call than Cornwall Insight's final number, and one that turned out to be low.² The autumn is where the real risk accumulates. Analysts have flagged a potential "payment shock" as cooling demand picks up and households move off summer rates. The July cap covers only the July-to-September period; if wholesale gas remains elevated through the summer injection season, the October reset could carry further upside.^4,3 Contrarian signals in the forward market are worth noting here. TTF front-month and German baseload front-month are both carrying bearish supply signals at moderate confidence, suggesting the market sees some downside risk to current gas prices — which, if realised, would limit autumn cap pressure. Henry Hub's forward curve is similarly bearish, though its influence on European household bills runs only through the Atlantic LNG arbitrage, and that route requires a wide enough spread between European and US prices to pull cargoes across.⁶ The IEA's longer-dated projections give structural context. The agency's Electricity 2026 report forecasts renewables and nuclear reaching 50% of the global power mix by the end of the decade, with solar PV alone adding over 600 TWh annually through 2030. For Britain, which is further advanced in offshore wind deployment than most comparable markets, the directional logic supports the electricity-gas bill divergence widening over time — though the pace will depend on storage build-out and interconnector capacity, neither of which insulates households from short-cycle gas price events like the current one.¹ The immediate watch point is not the July cap itself, which is now confirmed, but whether the ceasefire in the Middle East holds through the summer gas storage injection period. If commodity prices ease, Cornwall Insight's October forecast will come down. If the ceasefire fractures or negotiations stall, the autumn reset could add another layer to what is already a household affordability problem that analysts described as "a kick in the teeth."^5,7