Later this week we will know “all elements of royal finances” when King Charles shares his personal tax information. It will be the first time a sovereign on the throne has ever done so.

The decision was made “in order to constantly improve” and to “encourage wider understanding of our accountability”, a Buckingham Palace spokesperson confirmed.

This transparency measure to improve public understanding of monarchy finances was King-led. Although the Queen first agreed to pay tax in 1993, no monarch has gone as far as Charles’s disclosure.

The King’s personal tax information and other financial reports for the 2024-25 financial year will be published during the week while his current 2025-26 personal tax details will be released next year.

A Buckingham Palace spokesperson said: “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.