Unused pension funds sit outside inheritance tax today, which is why pensions became a common way to pass wealth on. That ends on 6 April 2027, when most unused pension funds and pension death benefits are brought within the value of a deceased person's estate for inheritance tax (HMRC, Technical note: Inheritance Tax on pensions, UK). This briefing quantifies who is affected, using HMRC's own estimates alongside Office for National Statistics wealth data, and flags where figures are estimates rather than official statistics.
Two groups are affected in different ways. A first group of estates is pushed over the inheritance tax threshold for the first time by the value of a pension pot. A second, larger group already pays inheritance tax and will pay more. The Chancellor confirmed the reform at Budget 2025 on 26 November 2025, alongside a further one-year extension of the threshold freeze (HMRC, Inheritance Tax: unused pension funds and death benefits, published 26 November 2025). Figures are current as at July 2026 and are subject to change.
Executive summary
- From 6 April 2027, most unused pension funds and pension death benefits are brought within the value of a deceased person's estate for inheritance tax across the UK (HMRC technical note).
- HMRC estimates about 213,000 estates a year will hold inheritable pension wealth in 2027 to 2028, of which more than three-quarters are expected to have no inheritance tax liability (HMRC, 21 July 2025).
- About 10,500 estates are estimated to become newly liable to inheritance tax from 2027 to 2028, roughly 1.5% of UK deaths (HMRC, 21 July 2025).
- A further 38,500 estates already within inheritance tax are estimated to pay more once pension wealth is counted (HMRC, 21 July 2025).
- Personal representatives, not pension scheme administrators, are liable to report and pay the inheritance tax due on unused pension funds from 6 April 2027 (HMRC technical note).
- Death-in-service benefits from registered pension schemes are excluded from the charge, whether the scheme is discretionary or non-discretionary (HMRC, 21 July 2025).
- Private pension wealth made up 35% of total household wealth in Great Britain over April 2020 to March 2022, the second-largest component after property at 40% (ONS, published 24 January 2025).
- For context, 30,400 estates paid inheritance tax in 2023 to 2024, so the reform's affected population is large relative to the current taxpaying base (HMRC, published 30 July 2026).
Key findings
Each finding is a self-contained statement with a figure, a timeframe, a geography and a source. Figures produced by Fairchild Oldfield are labelled as estimates and set out in the original analysis.
- Most unused pension funds and pension death benefits are brought into inheritance tax for deaths on or after 6 April 2027, UK-wide (HMRC technical note).
- Around 213,000 estates a year are estimated to hold inheritable pension wealth in 2027 to 2028 across the UK (HMRC, 21 July 2025).
- More than three-quarters of those 213,000 estates are estimated to have no inheritance tax to pay in 2027 to 2028 (HMRC, 21 July 2025).
- About 10,500 estates are estimated to become newly liable to inheritance tax from 2027 to 2028, around 1.5% of UK deaths (HMRC, 21 July 2025).
- A further 38,500 estates already liable to inheritance tax are estimated to pay more once pension wealth is included, UK-wide, for 2027 to 2028 (HMRC, 21 July 2025).
- Personal representatives are liable to report and pay the inheritance tax on unused pension funds; beneficiaries become jointly and severally liable once benefits vest, from 6 April 2027 (HMRC technical note).
- Personal representatives can direct a pension scheme administrator to withhold up to 50% of a benefit for up to 15 months after the end of the month of death, to meet the inheritance tax (HMRC technical note).
- Death-in-service benefits payable from registered pension schemes are excluded from the charge from 6 April 2027 (HMRC, 21 July 2025).
- Where a member dies aged over 75, death benefits remain subject to the beneficiary's income tax, in addition to any inheritance tax on the estate, from 6 April 2027 (HMRC, 21 July 2025).
- Income tax will not be charged on the portion of relevant death benefits equal to the inheritance tax due on them, a relief to limit double taxation (HMRC, 21 July 2025).
- The nil-rate band is frozen at £325,000 and the residence nil-rate band at up to £175,000 until 5 April 2031, extended a further year at Budget 2025 (gov.uk; HMRC, 26 November 2025).
- Private pension wealth was 35% of total household wealth in Great Britain over April 2020 to March 2022, ranging from 28% in London to 42% in the North East and Scotland (ONS, published 24 January 2025).
- 30,400 estates incurred an inheritance tax charge in 2023 to 2024, equal to 4.72% of UK deaths, with a total liability of £7.03 billion (HMRC, published 30 July 2026).
- The average inheritance tax bill across taxpaying estates was £231,000 in 2023 to 2024, a 9% rise on the prior year, before the pension reform takes effect (HMRC, published 30 July 2026).