The Royal Family don’t pay inheritance tax only in one narrow situation: when private wealth passes from one reigning Monarch to the next. That exemption rests on Crown immunity, a legal doctrine that places the Sovereign outside UK taxing statutes, and on a 1993 agreement between the Crown and the government that confirmed no inheritance tax would be paid on sovereign-to-sovereign transfers. Every other member of the Royal Family, from siblings to non-heir children, pays inheritance tax at the same 40% rate as any other wealthy UK citizen.
The Legal Basis: Crown Immunity and the 1993 Agreement
Under Crown immunity, the Crown falls outside the scope of UK taxing statutes and can claim total relief unless an Act of Parliament specifically makes it liable.1GOV.UK. INTM860150 – Crown Immunity No such Act exists for inheritance tax. The Monarch therefore has no legal obligation to pay it in the first place.
In 1993, Queen Elizabeth II voluntarily agreed to pay income tax and capital gains tax on her private income. The terms were set out in a Memorandum of Understanding on Royal Taxation, first published in February 1993 and updated in 2023 to reflect King Charles III’s accession.2HM Treasury. Memorandum of Understanding on Royal Taxation The then-Chancellor told Parliament that although the payments were voluntary, both the Queen and the Prince of Wales intended them to continue indefinitely.3UK Parliament. Royal Taxation
The Memorandum carved out one area where no tax would be paid: transfers from one Sovereign to the next. This is the sovereign-to-sovereign exemption, and it is the specific reason inheritance tax does not apply when the Crown changes hands.
What the Sovereign-to-Successor Exemption Covers
The Memorandum splits royal assets into two categories.
The first covers assets held by the King as Sovereign rather than as a private individual: the official residences, the Royal Archives, and the Royal Collection of paintings and other works of art. These pass automatically from one Sovereign to the next and are never subject to inheritance tax. The Memorandum states that “it would clearly be inappropriate for inheritance tax to be paid in respect of such assets.”2HM Treasury. Memorandum of Understanding on Royal Taxation
The second category is genuinely private wealth: personal investments, savings, and privately owned properties like Sandringham House and Balmoral Castle. Under the voluntary arrangement, inheritance tax is not paid on gifts or bequests of these private assets from one Sovereign to the next. It is payable, however, on gifts and bequests to anyone else. Tax is also waived on assets passing to the Sovereign on the death of a consort of a former Sovereign.2HM Treasury. Memorandum of Understanding on Royal Taxation
The Memorandum gives two reasons for this carve-out. Private assets like Sandringham and Balmoral serve official as well as personal purposes. And the Monarchy as an institution needs enough private resources to function independently of the government of the day. Without the exemption, a 40% tax at every succession would erode those resources within a few generations.
Queen Elizabeth II’s Estate: How It Worked in Practice
When Queen Elizabeth II died in September 2022, her private assets passed to King Charles III entirely free of inheritance tax. Those assets included the Sandringham and Balmoral estates, personal jewellery, investments, and the Royal Stud that breeds horses. Estimates of her private wealth varied. The Sunday Times put her net worth at roughly £370 million, and Forbes estimated a higher figure, though no official disclosure was made.
Had the standard 40% rate applied above the £325,000 nil-rate band, the tax bill would have run into the hundreds of millions of pounds. Instead, the transfer was “disregarded” under the terms of the Memorandum.2HM Treasury. Memorandum of Understanding on Royal Taxation
The Duchies and the Crown Estate
Two large estates sit outside inheritance tax for a different reason. The Duchy of Lancaster and the Duchy of Cornwall are Crown bodies, and neither is liable to income tax, capital gains tax, or inheritance tax.2HM Treasury. Memorandum of Understanding on Royal Taxation
The Duchy of Lancaster provides the Monarch’s Privy Purse income. The Duchy of Cornwall works similarly for the Prince of Wales, who receives its annual income but is not entitled to its capital assets.4Duchy of Cornwall. FAQs When the Duke of Cornwall changes, no property technically transfers, so inheritance tax never arises on the Duchy itself.5UK Parliament. Duchy of Cornwall: Inheritance Tax
The Crown Estate is a separate entity again, often confused with the Monarch’s personal wealth. It is a portfolio of land, property, and seabed rights held “in right of the Crown” rather than owned privately by the King. The Crown Estate cannot be sold by the Monarch, and its revenues do not belong to the Sovereign personally.6The Crown Estate. FAQs Because it never changes personal ownership, inheritance tax is irrelevant to it. Its net profits go to HM Treasury, and a percentage is returned to the Royal Household through the Sovereign Grant.
Other Royals Pay Inheritance Tax Like Anyone Else
The sovereign-to-successor exemption is narrow. It covers transfers from one Sovereign to the next, and from a former Sovereign’s consort to the new Sovereign. Everyone else in the Royal Family is treated as any other private citizen for inheritance tax purposes.
Princess Margaret’s estate is the clearest example. After her death in 2002, her estate was valued at approximately £7.7 million gross and was subject to inheritance tax at the standard 40% rate, with no special concessions for her royal status. After tax, roughly £4.5 million passed to her children, Viscount Linley and Lady Sarah Chatto. Her son’s office publicly confirmed that the estate was taxed in the same way as any other.
Non-heir royals use the same estate planning tools available to any UK taxpayer. Gifts made more than seven years before death fall outside the inheritance tax net entirely.7GOV.UK. How Inheritance Tax works: thresholds, rules and allowances – Section: The 7 Year Rule Transfers between spouses and civil partners are exempt. And individuals can pass on up to £325,000 tax-free through the nil-rate band, with an additional £175,000 available when a home passes to direct descendants.8GOV.UK. Inheritance Tax Thresholds and Interest Rates Beyond those allowances, the 40% rate applies just as it would to any other wealthy family.
Tax the Monarch Does Pay
The inheritance tax exemption doesn’t mean the King pays no tax at all. Under the Memorandum, the Sovereign voluntarily pays income tax on all private sources of income, including investment returns and trading profits. Tax is also paid on income from the Privy Purse (funded by the Duchy of Lancaster) to the extent that income is not used for official purposes.2HM Treasury. Memorandum of Understanding on Royal Taxation Capital gains tax is paid on the same basis.
The rates match those for any high-earning individual, and the payments have been maintained since 1993 with any future rate changes applying automatically.3UK Parliament. Royal Taxation Prince William, the current Duke of Cornwall, voluntarily pays income tax at the highest rate on Duchy income not used for official expenditure, continuing the practice established by his father. The ongoing income of senior royals is therefore taxed much like anyone else’s. It is only the passage of private wealth from one Sovereign to the next that escapes tax, and only because the Memorandum keeps it that way.