IHT Cumulative Chargeable Transfers: The 7-Year Running Total Explained
The nil-rate band is a 7-year rolling total — not an annual allowance. Every chargeable lifetime transfer (CLT) made in the 7 years before death reduces the NRB available at death. Failed PETs also count. A large CLT shortly before death can eliminate the NRB entirely — leaving the whole death estate taxable at 40%.
Worked Examples
Example 1: CLT reduces NRB at death
Facts: In Year 1, Alice puts £225,000 into a discretionary trust (a CLT). No IHT is due at the time (below the £325,000 NRB). Alice dies in Year 5. Her death estate is £400,000.
Calculation: NRB at death: £325,000. Less CLTs in the 7 years before death: £225,000. Available NRB at death: £100,000. Chargeable estate: £400,000 − £100,000 = £300,000. IHT: £300,000 × 40% = £120,000.
Lesson: Without the CLT, the NRB would have covered £325,000 of the death estate — IHT would have been (£400,000 − £325,000) × 40% = £30,000. The CLT costs the estate an extra £90,000 in IHT.
Example 2: Failed PET also reduces the NRB
Facts: In Year 1, Bob gives his son £200,000 (a PET). In Year 3, Bob gives his daughter £150,000 (another PET). Bob dies in Year 4. His death estate is £300,000.
Calculation: Both PETs fail (within 7 years of death). They are cumulated against the NRB: £200,000 + £150,000 = £350,000 in failed PETs. NRB: £325,000. Available NRB for the death estate: nil (the failed PETs exceed the NRB). Death estate: £300,000 × 40% = £120,000 IHT on the death estate. The failed PETs are also taxable: £350,000 − £325,000 = £25,000 excess above NRB. IHT on PETs: £25,000 × 40% = £10,000 (shared between the two PETs proportionally, with taper relief possibly applying to the year 1 PET).
Lesson: If Bob had survived 7 years from the year 1 gift, it would have dropped out of the 7-year window and the NRB would have been available for later transfers. The order and timing of gifts within the 7 years matters enormously.
Example 3: CLT exits the 7-year window before death
Facts: In Year 1, Carol puts £300,000 into a discretionary trust (a CLT — no immediate IHT as it is within the NRB). Carol makes no further transfers. Carol dies in Year 8.
Calculation: The CLT was made more than 7 years before death. It falls outside the 7-year cumulation window. The NRB at death is the full £325,000. Carol's death estate of £250,000 is entirely within the NRB — no IHT. If Carol had died in Year 6 instead, the CLT would still be within the window, reducing the NRB by £300,000 — leaving only £25,000 of NRB for the death estate.
Lesson: CLTs made more than 7 years before death are not cumulated against the NRB at death. The 7-year 'clock' for each transfer starts on the date of that specific transfer.
Frequently Asked Questions
What is the 7-year cumulation principle for IHT?
The nil-rate band (NRB) is a 7-year rolling allowance, not a lifetime or annual allowance. When calculating IHT on a person's death (or on a CLT), the available NRB is reduced by the value of all chargeable transfers made in the 7 years immediately before the date of the current transfer or death. This is called the cumulation principle. The effect: the NRB is not refreshed after each gift — it accumulates across all transfers in the rolling 7-year window. A person who made large CLTs (e.g. gifts into discretionary trusts) shortly before death may have little or no NRB available to set against the death estate, resulting in much higher IHT on death than they expected.
Which transfers are included in the 7-year cumulation?
For the purpose of calculating the available NRB at death, the following transfers are included in the 7-year cumulation: (1) Chargeable lifetime transfers (CLTs) — transfers into discretionary trusts and certain other chargeable transfers (e.g. transfers to most companies). These are included in the cumulation from the date they were made. (2) Potentially exempt transfers (PETs) that fail — if the donor dies within 7 years of making a PET (a gift to an individual), the PET becomes a failed PET and is included in the cumulation against the NRB at death. Annual exempt gifts (up to £3,000 per year), small gifts (up to £250 per donee), gifts on marriage, and other exempt transfers are NOT included in the cumulation — they are fully exempt and do not reduce the NRB.
How do CLTs affect the NRB at a later 10-year trust anniversary?
Cumulation affects not only the NRB at death but also the NRB available for the 10-year periodic charge on discretionary trusts and for exit charges. For the 10-year charge, the available NRB is reduced by: (a) CLTs made by the settlor in the 7 years before the trust was established; (b) the value of the trust property itself when it first became relevant property (or at the last 10-year anniversary). The cumulation window for the trust's 10-year charge is therefore calculated differently from the cumulation window at death — trustees of discretionary trusts should obtain a calculation of the available NRB for each 10-year anniversary, taking account of the settlor's prior CLTs when the trust was created.
Does a PET reduce the NRB for earlier CLTs if the donor dies?
This is a key question of ordering. When a donor dies within 7 years: (1) All failed PETs and CLTs in the 7-year window are included in the cumulation total, in chronological order, oldest first. (2) The NRB is applied chronologically — earliest transfers use the NRB first, then later transfers use whatever NRB remains. (3) If the earlier CLT was within the NRB at the time it was made, but later failed PETs have consumed the NRB by the time of death, the earlier CLT may now face an additional death tax charge (because its entry into the estate on death re-opens the CLT calculation using the death rate of 40%, less the 20% already paid at entry). The interaction of CLTs and PETs across the 7-year window requires careful modelling — the total IHT depends on the amounts, the order, and the years since each transfer.
How can the 7-year cumulation principle be used in IHT planning?
Understanding cumulation leads to several important planning strategies: (1) Start the 7-year clock as early as possible — the sooner a PET or CLT is made, the sooner it drops out of the cumulation window. Even if the donor does not survive 7 years, taper relief reduces the tax for deaths in years 3–7. (2) Sequence transfers carefully — where possible, make the largest gifts first so they exit the 7-year window before smaller gifts. (3) Avoid large CLTs close to death — a CLT made shortly before death will consume NRB that could otherwise have sheltered the death estate. (4) Use the NRB band — transfers within the NRB on each 7-year cycle generate no immediate tax and exit the window after 7 years, refreshing the full NRB for future transfers. A structured programme of NRB-sized gifts into trust every 7 years can progressively reduce the taxable estate without immediate IHT cost.
What happens if the 7-year window includes transfers that exceed the NRB?
Where cumulative transfers in the 7-year window exceed the NRB (£325,000), the available NRB for the death estate (or subsequent CLT) is nil — the entire death estate above zero is chargeable at 40%. There is no double-NRB effect. The NRB is not applied twice (once to the CLTs and again to the death estate) — it is a single pool shared across all transfers in the 7-year window. Where CLTs in the 7-year window used the full NRB at the lifetime rate (20%), and the donor then dies within 7 years, additional death tax may be due at the full 40% rate on those CLTs (less the 20% already paid and any taper relief). The IHT paid on the CLT entry is credited against the total death rate — but the total rate on large CLTs followed by early death is 40%, not 60%.
Have You Made Significant Gifts in the Last 7 Years?
The cumulation principle means gifts made years ago can affect the IHT on your death estate today. A will that accounts for your recent gift history — and that makes best use of remaining NRB — starts with a WillSafe will kit.
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