The 14-year inheritance tax rule is what lets HMRC reach back as far as 14 years before death to pull an old gift into the tax calculation on your estate. It only bites in a specific sequence: you put money or assets into a trust, later make a direct gift to an individual, and then die within seven years of that direct gift. Because tax on the failed direct gift is worked out by looking back seven years from the date of the gift for earlier chargeable transfers, an trust gift made up to seven years before that can still count, which is how the window stretches to 14 years in total.
How the Two Seven-Year Periods Chain Together
There is no standalone “14-year rule” in the legislation. The window is a by-product of how section 7 of the Inheritance Tax Act 1984 calculates tax on a chargeable transfer: HMRC totals all chargeable transfers the donor made in the seven years ending on the date of that transfer to see how much of the nil-rate band has already been used.1Legislation.gov.uk. Inheritance Tax Act 1984 – Section 7
Now chain two of those seven-year periods together. Imagine a donor puts assets into a discretionary trust in Year 1, makes a direct gift to their child in Year 7, and dies in Year 13. The donor died within seven years of the direct gift, so that gift fails and becomes chargeable. To tax it, HMRC looks back seven years from Year 7 for earlier chargeable transfers. The trust gift in Year 1 sits inside that window. Even though the trust gift was made 12 years before death, it gets pulled into the sum because it falls within seven years of the failed direct gift.
The practical effect is narrow but sharp. The old trust gift is not taxed again at the full death rate, because it is outside the seven years before death. What it does is eat into the nil-rate band available for the later gift. Donors who assumed a trust gift was safely in the past discover it is still shaping the tax bill on transfers made years afterwards.
The Two Gift Types That Make the Rule Work
The rule only triggers because the Inheritance Tax Act 1984 treats direct gifts and gifts into trusts differently.2Legislation.gov.uk. Inheritance Tax Act 1984 – Section 3A
A direct gift from one individual to another, called a potentially exempt transfer (PET), is free of inheritance tax if the donor survives seven years. Die inside that window and the gift fails, becoming chargeable and counting toward the estate.
A gift into a trust, typically a discretionary trust, is a chargeable lifetime transfer (CLT). A CLT can trigger tax immediately at the lifetime rate of 20% on any amount over the available nil-rate band, which is half the death rate.3GOV.UK. Inheritance Tax Manual – Section 4: Transfer of Value in Life and on Death If the donor dies within seven years of the CLT, more tax may be owed at the full 40% rate, less what was paid at 20%.
The 14-year rule needs the CLT to come first and the PET to come second. A PET followed by a CLT does not stretch the window in the same way, because a PET only becomes chargeable on death, not on the date of a later transfer.
How the Nil-Rate Band Gets Allocated
The nil-rate band is the £325,000 threshold below which no inheritance tax is charged. It is frozen at that level through at least April 2028.4HM Revenue & Customs. Inheritance Tax Nil-Rate Band and Residence Nil-Rate Band Thresholds From 6 April 2026 to 5 April 2028 Once the 14-year rule brings an older gift into view, the allowance is used chronologically. The earliest chargeable transfer takes its slice first, and later gifts get whatever is left.
That order of allocation is what causes the damage. Take a donor who put £325,000 into a trust 13 years before death, then gave £200,000 outright to a child five years before death. The trust gift, by virtue of being first in the chronology and sitting within seven years of the failed direct gift, absorbs the whole nil-rate band. The £200,000 to the child has no allowance left and is taxed on its full value at 40%. The child, not the trust, carries the bill, even though the trust gift happened more than a decade earlier.
Why Taper Relief Does Not Soften the Older Gift
Taper relief reduces the tax charged on gifts made between three and seven years before death, but only where tax is actually due (that is, where the cumulative gifts exceed the nil-rate band). The reductions run on a sliding scale:1Legislation.gov.uk. Inheritance Tax Act 1984 – Section 7
- 3 to 4 years before death: 80% of the full rate (effective 32%)
- 4 to 5 years before death: 60% of the full rate (effective 24%)
- 5 to 6 years before death: 40% of the full rate (effective 16%)
- 6 to 7 years before death: 20% of the full rate (effective 8%)
Two points regularly trip people up. First, taper relief cuts the tax, not the value of the gift. A £400,000 gift six years before death still uses £400,000 of the nil-rate band; only the tax on the £75,000 above £325,000 is reduced, in that case to 8%.5GOV.UK. How Inheritance Tax Works: Thresholds, Rules and Allowances – Rules on Giving Gifts Second, and more painfully for anyone caught by the 14-year rule, taper relief applies only to transfers made within seven years of death. A trust gift made 10 or 12 years before death sits too far back to benefit from any reduction, yet close enough to a later failed gift to eat into its nil-rate band. Old enough to miss the relief, recent enough to do the harm.
What Executors Need on Record
When someone dies within seven years of making a gift, their personal representatives have to account for every failed PET and every CLT on the inheritance tax return. The 14-year rule means that record has to reach back 14 years, not seven. Executors need dates, values, recipients, and the nature of each transfer in order to work out the cumulative totals and allocate the nil-rate band correctly.
Without that history, the calculation becomes guesswork, and HMRC can charge interest and penalties on any tax underpaid as a result. The most useful thing a donor can do while alive is keep a written log of every substantial gift: what was given, when, to whom, and (for gifts into trust) which trust received it. It costs nothing during life and spares the executors from reconstructing a decade and a half of transactions after death.