King Charles III is set to become the first British monarch to publicly disclose his personal tax bill, in a landmark move to enhance transparency around royal finances. The decision, announced by Buckingham Palace, marks a significant step in modernising the monarchy's financial arrangements.
Voluntary Disclosure of Tax Details
The King will voluntarily publish his personal tax information for the 2024-25 financial year later this week, alongside other reports on royal finances. His 2025-26 tax details will be released next year after their audit is completed. A Buckingham Palace spokesperson confirmed: "While this is the first time a monarch has shared this personal tax information, you may recall it was similarly released by His Majesty when he was prince of Wales. The decision to do so as Sovereign has come at the express wish of the King himself, as part of the adaptations carried across since accession."
Sources of Income
The King's private sources of income may include money from investments, trading profits, funds generated by his private estates of Balmoral and Sandringham, and private savings. Additionally, the Duchy of Lancaster estate—a private portfolio of land, investments, and commercial properties—provides the King with an annual income. In 2024-25, this income stood at £26.8 million. The Duchy was designed to give the monarch an independent source of income, historically known as the Privy Purse, used for both official and private expenditure and for meeting expenses of other royal family members.
Tax Arrangements and Comparison
Charles voluntarily pays income tax on all his private income and capital gains tax on relevant assets, as outlined in the Memorandum of Understanding on Royal Taxation 2023, agreed by the Government. This contrasts with the Prince of Wales, who has not disclosed the tax he has paid since becoming heir to the throne. William receives an income from the Duchy of Cornwall, a billion-pound hereditary estate that includes The Oval cricket ground and Dartmoor Prison. He received nearly £23 million last financial year from the Duchy and voluntarily pays the highest rate of income tax after official costs are deducted, but the amount he pays in tax is not disclosed. It was recently reported that William plans to invest £500 million from selling off a fifth of his Duchy estate and other transactions to have a "positive impact on the world."
Broader Financial Transparency
Alongside the King's tax disclosure, accounts detailing the Sovereign Grant—which funds the official duties of the royal family—will be published at a press briefing this week. Last year, the Sovereign Grant stood at £86.3 million, comprising £51.8 million for core elements like travel and payroll costs and £34.5 million to fund the Buckingham Palace Reservicing Programme. A separate extensive new royal household report on royal finances will also be released. A Buckingham Palace spokesperson said: "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." The Duchy of Lancaster's accounts will also be published at another press briefing.
Modernising the Monarchy
The Palace emphasised that these measures are part of ongoing efforts to modernise and evolve. A Buckingham Palace spokesperson stated: "In order constantly to improve, and to encourage wider understanding of our accountability, the royal household has been considering options to enhance this transparency still further—and can today announce additional measures in keeping with our public service priorities. To put it simply: we continue to modernise and evolve." The King and Queen Camilla spent the week at Royal Ascot before the announcement.
