How Inheritance Tax Works in the UK
Inheritance Tax (IHT) is charged at 40% on the value of an estate above the available nil-rate bands at the time of death. Every individual has a standard nil-rate band of £325,000, which has been frozen at that level since 2009 and remains frozen until at least April 2030. In addition, the residence nil-rate band (RNRB) provides up to £175,000 of additional exemption where a main residence is passed to direct descendants (children, grandchildren) — though this tapers away for estates above £2 million at the rate of £1 of RNRB for every £2 of estate value above the threshold.
A married couple or civil partnership can effectively combine their nil-rate bands. The unused nil-rate band of the first to die is transferred to the survivor, so a couple passing their estate to children can potentially shelter up to £1,000,000 (£325,000 + £325,000 + £175,000 + £175,000) before IHT applies. For many middle-class UK households — particularly those in London and the South East where property values are high — even this combined allowance leaves a meaningful taxable estate.
Estates above the available nil-rate bands are taxed at 40%, reduced to 36% if at least 10% of the net estate is left to charity. Broadly, the IHT due on death must be paid within six months, though property and certain other assets can be paid in instalments over ten years.
Pensions as Historically IHT-Free Assets
Until very recently, defined contribution pension pots enjoyed a uniquely favourable IHT position: they sat outside the deceased’s estate entirely. A pension pot of £500,000 left to a beneficiary was not subject to IHT at all, regardless of the total estate value. Beneficiaries could then draw the inherited pension pot subject to income tax (if the deceased died after age 75) or entirely tax-free (if the deceased died before age 75).
This arrangement made pensions extraordinarily powerful as inter-generational wealth transfer vehicles. The optimal strategy — well known among UK estate planners and the FIRE community alike — was to spend ISA and other assets first in retirement, preserving the pension pot as an IHT-free legacy. The pension effectively became a tax-free inheritance wrapper as much as a retirement savings vehicle.
This is the context that makes the October 2024 Budget announcement so significant for UK FIRE planning.
The October 2024 Budget Change: Pensions and IHT from April 2027
In the Autumn Budget of October 2024, the Chancellor announced that unused defined contribution pension funds will be brought within the scope of inheritance tax from April 2027. Under the proposed rules, pension pots left at death will be counted as part of the deceased’s estate and subject to the standard 40% IHT charge above the available nil-rate bands — in the same way as ISAs, property, and other assets.
The mechanics of the proposed regime are still being finalised through consultation, but the broad structure is that the pension administrator will be responsible for calculating and paying the IHT due from the pension fund before passing the remainder to beneficiaries. The income tax treatment of inherited pension withdrawals for beneficiaries will continue to apply on top — creating a potential double charge (IHT on the pot at death, then income tax as the beneficiary draws it down), though the specific interaction is subject to further legislation.
It is important to note that the change applies from April 2027. Pension pots inherited from deaths before that date continue to benefit from the historic IHT exemption. The window between now and April 2027 is therefore a period during which existing pension holders can review and adjust their estate plans.
What the 2027 Change Means for FIRE Planning
The April 2027 change fundamentally reverses the optimal pension spending order for those with significant estates. Before the announcement, the dominant strategy was: spend ISA money first, preserve the pension as a tax-free IHT wrapper, and pass the pension to beneficiaries as a tax-efficient legacy. After April 2027, the pension loses its special IHT status, making this strategy largely obsolete.
The new optimal strategy for those with estates likely to be subject to IHT is closer to the opposite: spend pension assets first during retirement, while preserving ISA assets as a legacy. The reasoning is that ISA assets passed to a spouse or civil partner can be transferred as an Additional Permitted Subscription (APS) — maintaining their ISA status and tax-free growth. ISA assets are fully in the estate for IHT, but so will pensions be from 2027, removing the previous pension advantage.
For FIRE investors with large pension pots relative to their spending needs, accelerating pension drawdown in the years before April 2027 — and staying within the basic-rate tax band where possible — may be worthwhile to reduce the eventual IHT exposure. Pension assets that are withdrawn and spent, gifted under the various IHT exemptions, or transferred to an ISA cannot be subject to the new IHT charge.
ISA vs Pension for Estate Planning: The New Landscape
ISAs are fully within the estate for IHT purposes and always have been. A large ISA portfolio passed to adult children forms part of the estate and is subject to 40% IHT above the nil-rate bands. The one exception is the ISA transferred to a surviving spouse or civil partner — this qualifies for the spouse exemption and transfers IHT-free.
From April 2027, both ISAs and pensions will be subject to IHT on death (above the available nil-rate bands). The distinction between the two for estate planning therefore narrowed significantly. However, ISAs retain one practical advantage in this context: there is no additional income tax charge when an ISA is inherited (the beneficiary simply receives the cash or assets outside of any tax wrapper), whereas inherited pension funds, once withdrawn by the beneficiary, remain subject to income tax. The combination of IHT on the pot plus income tax on subsequent withdrawals means that pension funds remain subject to a heavier effective tax burden than ISAs for high-value estates after 2027.
Lifetime Gifts and the Seven-Year Rule
One of the most effective — and widely underused — strategies for reducing IHT is lifetime gifting. Under UK IHT rules, gifts made more than seven years before death fall entirely outside the estate. Gifts made within seven years are subject to “taper relief” that reduces the IHT rate on a sliding scale: gifts made 3–4 years before death attract a 32% effective rate; gifts 4–5 years before death, 24%; 5–6 years, 16%; 6–7 years, 8%.
For FIRE investors who achieve financial independence significantly before the average life expectancy, the seven-year clock starts earlier. A person who retires at 50 with a large estate and begins making significant gifts at 55 will have seven years completed by age 62 — well within a typical life expectancy. This is a meaningful structural advantage of early retirement for IHT planning that is often overlooked.
In addition to the seven-year potentially exempt transfer rule, several annual exemptions allow gifts without any IHT implications regardless of when death occurs:
- Annual gift exemption: £3,000 per donor per tax year (can be carried forward one year if unused)
- Small gifts exemption: up to £250 per person per year to any number of recipients
- Wedding / civil partnership gifts: £5,000 to a child, £2,500 to a grandchild, £1,000 to any other person
- Normal expenditure out of income: regular gifts from surplus income (not capital) are IHT-free if they do not reduce the donor’s standard of living — this can be a very substantial exemption for FIRE investors whose portfolio generates more income than they spend
Charitable Giving and IHT
Gifts to registered charities on death are entirely exempt from IHT — they are deducted from the estate before the tax calculation. Leaving 10% or more of the net estate to charity also reduces the IHT rate on the remainder from 40% to 36%, potentially benefiting both the charity and the remaining beneficiaries.
For FIRE investors who have accumulated beyond their spending and gifting needs and have charitable intentions, incorporating legacy charity giving into the estate plan is straightforward and tax-efficient. Deeds of variation — allowing beneficiaries to redirect inherited assets to charity within two years of death while retaining the IHT treatment as if the gift had been made in the will — provide additional flexibility.
The Residence Nil-Rate Band Interaction
The residence nil-rate band (RNRB) of up to £175,000 per person applies only where a main residence is passed to direct descendants. Critically, the RNRB is tapered for estates with a net value above £2 million — at a rate of £1 for every £2 above the threshold. A large pension pot that is brought into the estate from April 2027 could therefore push the estate above the £2 million taper threshold, reducing or eliminating the RNRB and significantly increasing the IHT liability.
This interaction between pension values and the RNRB is a specific planning concern for FIRE investors with substantial pension pots and residential property who were relying on the full RNRB to shelter their estate. Reducing the pension pot before April 2027 — through accelerated drawdown, charitable giving from the pension (subject to rules), or simply spending it — may preserve the RNRB for those on the margin of the £2 million threshold.
Practical Planning Steps for UK FIRE Investors
The inheritance tax and pension landscape is changing significantly, and the practical planning implications for UK FIRE investors are substantial. Key steps to consider:
- Review the estate value including pension pots, ISAs, property, and other assets to establish whether IHT is likely to apply
- Model accelerated pension drawdown before April 2027 to reduce the pension balance that will be subject to the new IHT rules
- Review the spending order — consider spending pension assets earlier in retirement rather than preserving them as a legacy
- Maximise annual gifting exemptions and begin the seven-year clock on larger gifts where financially comfortable to do so
- Check whether the estate value (including pension from 2027) approaches the £2 million RNRB taper threshold
- Consider making a will that explicitly addresses pension nomination, charitable intentions, and property succession
The UK FIRE Calculator at the top of this page helps you model your accumulation and drawdown path, understand the interplay between pension and ISA balances over time, and project how different spending strategies affect your portfolio longevity. For IHT-specific planning, consulting a qualified financial adviser with estate planning expertise is strongly recommended — the interaction between pension changes, the RNRB, and lifetime gifting is sufficiently complex that bespoke advice is well worth the cost for significant estates.