Where inheritance tax came from: estate duty to today (UK)

18 September 2026 · Inherit Vault

Britain has been taxing death for well over three hundred years, and the modern version exists largely because a Victorian Chancellor needed to pay for battleships. That history isn't trivia. It explains why inheritance tax feels like three different taxes wearing the same coat, because that's more or less what it is.

1694: the first go

The earliest ancestor is the probate duty introduced in 1694, a stamp duty on the paperwork needed to administer an estate. It was a war tax, brought in to fund the fighting against France, and it set a pattern that has repeated ever since. Death duties in this country have almost always arrived when a government needed money quickly and looked for a tax that few of the living would feel.

1894: estate duty, and the modern shape

The Finance Act 1894 is the one that matters. Sir William Harcourt swept together the tangle of existing duties into a single estate duty, charged on the whole capital value of everything a person left, on a graduated scale. That was the genuinely radical move: taxing the estate as one lump rather than taxing individual legacies, and charging more as the estate got bigger. Every version since has been a variation on Harcourt's design, and it was introduced, again, to close a deficit driven by naval spending.

Why it was easy to avoid

Estate duty taxed what you owned when you died, so the obvious answer was to own less by then. Give it all away in good time and there was nothing to tax. Gifts made shortly before death were caught, and the period crept up over the decades, but the fundamental weakness stayed. It became known, not entirely fairly, as a voluntary tax paid by those who distrusted their heirs or died suddenly.

1975: capital transfer tax

The Finance Act 1975 replaced estate duty with capital transfer tax, and this is where the modern architecture arrives. The point of CTT was to tax transfers during life as well as at death, closing the giveaway loophole properly. It was thorough, unpopular with the people who paid it, and complicated enough to keep a generation of advisers busy.

1986: the rename that changed the rules

The Finance Act 1986 did two things. Section 100 declared that the tax charged under the Capital Transfer Tax Act 1984 would be known as inheritance tax, and that the Act itself could be cited as the Inheritance Tax Act 1984. So the governing statute is dated two years before the tax it now names, which is a small piece of legislative comedy that trips people up constantly when they go looking for the law.

The second thing was substantive: lifetime giving was largely let back off the hook, with outright gifts becoming potentially exempt if you survived them by seven years. That's the origin of the seven year rule everyone half-remembers. The same Act introduced the gifts with reservation rules, precisely because letting people give things away again reopened the obvious trick of giving away the house and staying in it.

Why the rules feel bolted together

Because they are. There's a Victorian idea at the base, taxing the whole estate on a graduated scale. There's a 1970s idea layered on top, taxing lifetime transfers. And there's a 1986 idea layered on that, letting most lifetime transfers go free after seven years while blocking the ones that are gifts in name only. Add the reliefs added since, and it's less a designed system than a building that's been extended four times.

What's changed recently

The last few years have been unusually busy. The nil rate band has been frozen at £325,000 for years and is set to stay frozen until April 2031, which raises revenue without anyone announcing a rate rise. The residence nil rate band arrived in 2017. From 6 April 2026 agricultural and business relief share a capped £2.5m allowance, covered in the farming piece. And from 6 April 2027 unused pension funds come into the net for the first time. Each of those follows the historical pattern exactly: broaden the base, leave the headline 40% rate alone.

The one constant

Every version of this tax, from 1694 onwards, has depended on somebody being able to say what the deceased actually owned. Estate duty needed an inventory. Capital transfer tax needed a history of lifetime gifts. Inheritance tax needs both, plus seven years of gifts, plus evidence for every relief claimed. The tax has been redesigned four times. The administrative burden on the family has only ever gone up.

Which is the practical thing to take from three centuries of it. The rules will keep changing, and there's nothing you can do about that. What doesn't change is that your executors will be asked what you owned, what you gave away and when. That list is the same list whatever the tax is called next, and the only person who can write it easily is you. If you want the current position rather than the history, the exemptions piece sets out what passes tax free today.

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