In the Autumn Statement, the Chancellor announced that the rate of the Energy Profits Levy, the windfall tax imposed on UK oil and gas extractors in Spring 2022, would be increased from 25% to 35%. The energy profits levy had been due to end at the end of December 2025, but will now stay in force until the end of March 2028.
In addition, the Chancellor announced the introduction of a new and temporary Electricity Generator Levy ("EGL"). The EGL will be imposed on "Exceptional Generation Receipts" ("windfall profits") of UK electricity generator companies and groups at a rate of 45%. The EGL is due to come into force on 1 January 2023 and will be legislated to end on 31 March 2028. Although the rate of the EGL is higher than the energy profits levy, the overall rate of taxation for oil and gas companies will be 75% on all oil and gas profits, whereas the overall rate for electricity generator companies will be 70% from April 2023. This combined 70% rate will only apply to windfall profits that fall within the EGL.
The Treasury has estimated that the EGL will raise £14.2 billion by 2028. This amount will be in addition to the over £40 billion revenue estimate to be raised by the Energy Profits Levy (when the rate rise and extension are factored in).
The EGL will apply to corporate groups (on an aggregate group wide basis where multiple group members are within the scope of the levy) that undertake electricity generation in the UK and are either connected to a national grid or connected to local distribution networks. The EGL will also be applied to groups generating electricity from nuclear, renewable and biomass sources who are benefitting from a significant increase in the price received for their output without a corresponding increase in the costs of generation.
EGL will only apply to windfall profits calculated using a benchmark price per megawatt hour of electricity (£/MWH). The Treasury has stated that the current benchmark £/MWH will be £75. The Treasury considers this to be the average rate above which electricity generation receipts are extraordinary and thus should be subject to the new levy. Further, in calculating their windfall profits, groups will be entitled to an allowance of up to £10m per year which will be deductible from the calculation of the windfalls profits that would otherwise be subject to the levy.
The EGL will not be applied to groups that do not generate more than 100 Gigawatt-hours (GWh) per annum of electricity from in scope generation assets in a "qualifying period" (the accounting period for the company responsible for administering the levy for the group.
The introduction of the EGL might seem to be at odds with the climate friendly measures announced by the UK during COP 27. However, the government has stated that the current energy crisis has resulted in some UK electricity generators realising "extraordinary returns" and that that electricity generators must make an "appropriate contribution" to the substantial cost of support for energy bills.