The UK government’s windfall tax on North Sea oil and gas producers has become increasingly untenable as energy prices surge. Harbour Energy has delayed £2bn in projects, and production is declining, failing to meet revenue targets. Offshore Energies UK argues reforming the levy—lowering the trigger price to $90 per barrel and £30 per megawatt hour—would unlock £50bn in investments for 111 projects, potentially boosting production by 550,000 barrels daily by the 2030s. This could reverse production declines and meet 40% of UK energy needs, though domestic prices would still rise to international levels. The reform offers a sustainable path to energy security amid the current crisis.