King Charles III Has Paid More Than £30 Million in Tax Since Accession

Buckingham Palace confirmed on 26 June 2026 that King Charles III's total tax liability since his accession exceeds £30 million, a figure that places the voluntary royal taxation framework — in place since 1993 — under renewed public scrutiny alongside the unchanged Sovereign Grant of £86.3 million for 2024–25.

The £30 million figure covers the period from September 2022, when Charles acceded to the throne following the death of Queen Elizabeth II. The Palace's disclosure comes via its financial reports page, and while it does not break down the tax by year or type, it confirms the cumulative total as of the current reporting cycle. Prior to accession, Charles continued paying all taxes to which he was liable as Prince of Wales, as set out in the Memorandum of Understanding on Royal Taxation — a document that governs the fiscal relationship between the Crown and HM Revenue & Customs.

The voluntary nature of that arrangement is worth holding clearly in mind. Under the Sovereign Grant Act 2011 guidance, the Monarch and the Prince of Wales have voluntarily paid income tax and capital gains tax since 1993, when John Major's government reached an agreement with Buckingham Palace. That year marked a decisive shift from the pre-existing exemption — one that had become politically untenable in the post-Windsor Castle fire climate of public debate about royal finances. The arrangement is not statutory; it rests on a Memorandum of Understanding rather than legislation, which means it could, in principle, be varied or revoked. In practice, successive governments have treated it as settled policy.

The Sovereign Grant itself — the annual transfer from HM Treasury to the Palace, calculated as a percentage of Crown Estate profits — held at £86.3 million for 2024–25, unchanged from 2023–24. The Crown Estate's surging revenues, driven in large part by offshore wind leasing, have put upward pressure on the grant in recent years; the government's decision to cap the percentage at 12% of Crown Estate profits, combined with a commitment to review the arrangement, has kept the headline figure stable for now.

The coexistence of a £86.3 million grant and a £30 million-plus tax contribution frames the net cost of the monarchy in a way that Palace communications are clearly keen to foreground. Gross-to-net arithmetic is not always this straightforward — the Sovereign Grant funds official expenditure including property maintenance and royal travel, while the tax payments come from the Monarch's personal income streams, primarily the Duchy of Lancaster — but the juxtaposition carries obvious political utility during a period when public appetite for institutional spending scrutiny has intensified.

The Duchy of Lancaster, which generated around £24 million in revenue for the year ending March 2024, is the principal source of Charles's personal income as Monarch. It is exempt from corporation tax on its surplus, but under the voluntary framework the Sovereign pays income tax on the Duchy's net surplus at the standard rate. The mechanics are complex — the Duchy is a private estate held in trust for the Sovereign, not a commercial entity in the standard sense — but the effect is that Charles's income tax bill tracks Duchy performance closely.

What the Palace's disclosure does not address is the effective tax rate, the year-on-year trajectory, or any breakdown between income tax, capital gains tax, and inheritance tax. On inheritance, the Memorandum carves out a specific exemption: assets passing from one Sovereign to the next are exempt from inheritance tax, an arrangement that allowed the vast bulk of Elizabeth II's estate to transfer to Charles free of the 40% charge that would apply to any other estate above the threshold. That exemption remains in place and remains, for some critics, the more structurally significant feature of royal taxation.

The £30 million figure, nonetheless, carries weight as a benchmark. It establishes a documented, cumulative number against which future disclosures can be measured — and it signals that the Palace is prepared to be specific in a way that, historically, it has not always been.