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    Home > Uncategorized > Factbox-What is a windfall tax and when has Britain used it?
    Uncategorized

    Factbox-What is a windfall tax and when has Britain used it?

    Published by Wanda Rich

    Posted on May 26, 2022

    3 min read

    Last updated: February 6, 2026

    The image shows the City of London financial district, a hub for banking and finance, relevant to discussions on the British windfall tax impacting oil and gas companies.
    The City of London financial district highlighting economic impacts of windfall tax - Global Banking & Finance Review
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    Tags:oil and gasUK economytax administrationfinancial managementGovernment funding

    Quick Summary

    LONDON (Reuters) – The British government is expected to announce a windfall tax on oil and gas companies on Thursday to help fund a package of support for households struggling with a cost of living squeeze.

    LONDON (Reuters) – The British government is expected to announce a windfall tax on oil and gas companies on Thursday to help fund a package of support for households struggling with a cost of living squeeze.

    WHAT IS A WINDFALL TAX?

    A windfall tax is a one-off levy imposed on a company or a group of companies by the government, targeting excess and unexpected profits.

    Opponents of windfall taxes say they risk discouraging investment, but those in favour argue that by being a one-off they are less damaging to economic activity than other taxes.

    British finance minister Rishi Sunak is expected to announce an increase in the supplementary tax charge for oil and gas producers, with incentives to continue investment, an energy industry source said.

    WHY NOW?

    As Britain faces a cost of living crunch with surging energy prices and rising inflation, the opposition Labour Party has argued for a windfall tax on oil and gas companies, including BP and Shell, who have benefited from soaring oil and gas prices.

    On Tuesday, Britain’s energy industry regulator said energy bills were set to surge by another 40% in October.

    HOW HAVE SUCH TAXES BEEN USED IN BRITAIN BEFORE?

    BANK WINDFALL TAX, 1981

    Conservative prime minister Margaret Thatcher’s finance minister Geoffrey Howe imposed a windfall tax on banks that had made excess profits, having been largely protected from the effects of recession. It charged 2.5% of their non-interest bearing current account deposits to raise around 400 million pounds ($504 million).

    SUPPLEMENTARY PETROLEUM DUTY, 1981

    Howe also introduced a special tax, known as the Supplementary Petroleum Duty, on North Sea oil and gas firms which had benefited from soaring oil prices. It was levied on gross revenues rather than profit, at 20%. It was withdrawn after two years.

    PRIVATISED UTILITY FIRM LEVY, 1997

    Labour prime minister Tony Blair’s government imposed a levy on the excess profits of privatised utility companies which it argued had been undervalued when sold off by the Conservative government.

    It charged 23% of the difference between the value at which the companies were floated and their current value based on their profits since. The windfall tax was estimated to have raised 5.2 billion pounds and the money was used to fund a programme to help people off welfare and into work.

    WHICH OTHER COUNTRIES HAVE LEVIED THEM?

    SPAIN

    In September, Spain passed emergency measures to reduce high energy bills by redirecting billions of euros in extraordinary profits from energy companies to consumers via a windfall tax, with the government expecting to channel some 2.6 billion euros from energy firms to households over six months.

    ITALY

    In May, Italy said a 10% one-off levy on producers and sellers of electricity, natural gas and petrol products would be raised to 25% to help consumers and business cope with surging energy costs.

    The levy applies to profit margins that rose by more than 5 million euros between October last year and April this year compared to the same period a year earlier, with the exception of companies whose profit margin rose by less than 10%.

    ($1 = 0.7935 pounds)

    (Reporting by Farouq Suleiman, Editing by Kylie MacLellan and Emelia Sithole-Matarise)

    Frequently Asked Questions about Factbox-What is a windfall tax and when has Britain used it?

    1What is the supplementary petroleum duty?

    The supplementary petroleum duty is a tax introduced in the UK targeting North Sea oil and gas firms benefiting from high oil prices.

    2What are excess profits?

    Excess profits refer to earnings that significantly exceed the normal profit levels expected in a given industry or sector.

    3What is the purpose of a windfall tax?

    The purpose of a windfall tax is to redistribute unexpected profits from companies to support public welfare initiatives or economic stability.

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