King Charles to reveal personal tax bill in first for U.K. monarch

King Charles III is set to become the first British monarch to release his personal tax information, in a bid to improve transparency. Photo by Henry Nicholls /AFP

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King Charles III will reveal his personal tax bill in a bid to improve transparency, Buckingham Palace confirmed to AFP on Sunday, as royal finances come under increasing public scrutiny in Britain.

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British monarchs are legally exempt from paying certain taxes, though they have paid some duties voluntarily for decades.

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They also have no obligation to disclose their private tax bills, but recent scandals surrounding the disgraced former prince Andrew Mountbatten-Windsor have thrust the royal family’s finances into the spotlight.

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Charles began releasing his personal tax information when he was heir to the throne, but will become the first monarch to disclose it.

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“The decision to do so as Sovereign has come at the express wish of the King himself,” a palace spokesperson said in a statement released late Saturday to a limited number of British media outlets.

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It added that the move was “part of the adaptations carried across” since Charles acceded to the throne in 2022.

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“Our aim is to explain all elements of royal finances in a way that further enhances clarity and accessibility, while also placing it in its historical and constitutional context.

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“To put it simply: we continue to modernize and evolve.”

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Charles’s tax information will be shared on Thursday as part of the release of annual royal financial accounts, the BBC reported.

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Varied income

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The head of the royal family gets money from various sources, including the publicly-funded Sovereign Grant as well as private duchy income worth tens of millions of pounds more.

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The grant — an annual government payment to cover the costs of official duties by working royals — has increased markedly in 2025-2026, to £132.1 million (US$175 million), compared with £86.3 million the prior financial year.

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Meanwhile, Charles received £26.8 million in private income from the Duchy of Lancaster in 2024–25.

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Profits from the historic duchy — a large, diversified portfolio of land, property, and investments managed like a modern business — funds personal expenses and some official duties.

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It is the main source of private income for the head of the monarchy, with the heir — currently Charles’s eldest son William, Prince of Wales — benefiting from a similar arrangement with his Duchy of Cornwall.

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Prince William, Prince of Wales (centre), shown here with his wife, Catherine, Princess of Wales and their children, Prince George, Prince Louis, and Princess Charlotte, voluntarily pays income tax and capital gains tax on the Duchy of Cornwall profits. Photo by Chris Jackson /Getty Images

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Under U.K. law, monarchs do not have to pay income, capital gains or inheritance taxes.

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However, since 1993, they have voluntarily paid the first two, following public pressure and scrutiny of royal finances, including questions over who would pay for repairs following a fire at Windsor Castle.

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Like his father, William voluntarily pays income and capital gains taxes on his duchy’s profits.

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The upcoming tax disclosures will illuminate Charles’s other personal income.

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The king owns both Balmoral and Sandringham Estates, which were inherited from his mother, the late Queen Elizabeth II. They were exempt from inheritance tax under a long-standing government agreement.