The disclosure will mark the first occasion that Charles’s tax contributions as king are formally included in the annual royal accounts, providing greater insight into the financial arrangements of the British monarchy.

Under British law, the monarch is not required to pay income tax, capital gains tax or inheritance tax on assets inherited from a predecessor. However, Charles has voluntarily paid income tax and capital gains tax on certain private income and asset sales, a practice he previously followed during his tenure as Prince of Wales.

A Buckingham Palace spokesperson said the decision to publish the information was designed to “encourage wider understanding of our accountability” and reflected efforts to increase transparency around royal finances.

The annual accounts are expected to provide details of the Sovereign Grant, the public funding mechanism that supports official royal duties and the maintenance of royal properties. In the 2025/26 financial year, Charles received £132 million ($175 million) from the government through the grant system.

In addition to public funding, the king receives personal income from private estates, land holdings and investments. The forthcoming disclosure is expected to offer a clearer distinction between public funding allocated for official duties and the monarch’s privately generated income.

Buckingham Palace said Charles had previously disclosed information relating to his tax payments while serving as heir to the throne and intends to continue publishing such details annually during his reign.

The move comes amid increased scrutiny of royal finances and property arrangements. Last year, the House of Commons Public Accounts Committee launched an inquiry into residential property provisions made available to members of the royal family, reflecting broader parliamentary interest in the management and oversight of royal assets.

The publication of the accounts is likely to provide one of the most detailed public snapshots yet of the financial framework underpinning the modern British monarchy, as the palace seeks to demonstrate greater openness regarding its use of public funds and the king’s private financial obligations.