New UK pension inheritance tax rules could leave executors facing growing pressure from beneficiaries, pension providers, and tax authorities when unused pension pots begin falling inside taxable estates from April 2027.
Under the proposed rules, personal representatives administering estates may instruct pension scheme administrators to withhold up to 50% of taxable pension benefits for as long as 15 months while inheritance tax liabilities are calculated and settled.
The changes are expected to affect thousands of estates across the UK and could significantly increase the risk of probate disputes, delayed inheritances, executor liability concerns, and wider family tensions over pension wealth.
The reforms represent one of the most significant shifts in UK pension inheritance planning in recent years because unused pension funds have historically sat outside inheritance tax calculations for many discretionary pension schemes.
HMRC argues that pensions have increasingly been used as wealth-transfer vehicles rather than purely retirement savings products, particularly after pension freedoms introduced in 2015 and the removal of the Lifetime Allowance in 2023 allowed larger sums to remain sheltered within pensions.
From 6 April 2027, most unused pension funds and pension death benefits will instead become part of a deceased person’s taxable estate. That means executors, beneficiaries, pension scheme administrators, and advisers may all face a more complex probate and inheritance tax process once a death occurs.
The legal tension inside the reforms comes from who controls access to pension money while inheritance tax calculations are being completed. Executors already carry legal responsibility for reporting estates to HMRC and ensuring inheritance tax is paid correctly before assets are distributed.
Under the proposed system, those same executors may now need to delay pension payouts to beneficiaries in order to avoid personal liability exposure if inheritance tax has not yet been settled properly.
HMRC’s technical consultation states that where personal representatives reasonably expect inheritance tax to be due, they may direct pension scheme administrators to retain up to half of taxable pension benefits and pay inheritance tax directly to HMRC before releasing remaining funds to beneficiaries.
For many families, that could create immediate conflict if beneficiaries expect quick access to inherited pension wealth but instead face delays lasting months while valuations, nil-rate band allocations, and estate calculations are completed.
The risk is likely to become particularly acute in blended families, second marriages, estates involving multiple pension schemes, or situations where pension beneficiaries differ from wider estate beneficiaries.
A family member acting as executor could suddenly find themselves under pressure from relatives demanding faster distributions while simultaneously facing legal responsibility to ensure HMRC receives the correct inheritance tax payment.
HMRC’s consultation also acknowledges that executors can face liquidity problems because they may be legally responsible for inheritance tax linked to pension assets they cannot directly access themselves. The government argues the reforms will reduce that problem by allowing pension scheme administrators to pay inheritance tax directly from pension funds before distributions are made.
However, the operational burden of coordinating information between executors, pension schemes, beneficiaries, and HMRC may itself create new delays and friction during probate.
The consultation outlines a system requiring pension scheme administrators and executors to exchange detailed information within strict timelines. Executors must gather estate valuations, pension administrators must provide pension details, and nil-rate band calculations must then be allocated across different parts of the estate before tax liabilities can be finalised.
Inheritance tax remains payable within six months after the end of the month in which death occurs, after which late payment interest may begin accruing.
HMRC estimates that approximately 10,500 additional estates will become liable for inheritance tax under the reforms by 2027-28, while roughly 38,500 estates are expected to pay more inheritance tax than before. The average increase for affected estates is projected at around £34,000.
The consultation also highlights scenarios where inherited pension wealth may effectively face both inheritance tax and later income tax. Beneficiaries drawing inherited pension funds after inheritance tax has already been deducted could still face income tax liabilities at their marginal rate depending on how the funds are accessed.
HMRC’s own examples show cases where beneficiaries may need to withdraw significantly larger sums simply to cover inheritance tax liabilities connected to inherited pensions.
One example included in the consultation involves a £700,000 pension fund attached to an estate valued at £800,000. Under current rules, the inheritance tax liability on the estate would total £190,000 because the pension remains outside the taxable estate. Under the new system, the pension fund would become part of the estate, increasing the total inheritance tax exposure to £470,000.
The reforms are likely to increase demand for estate restructuring, inheritance tax planning, trust advice, gifting strategies, and pension nomination reviews before April 2027. Advisers may also see more families reassessing executor appointments and broader succession planning structures as pension wealth becomes increasingly tied to probate administration and inheritance tax exposure.
Although spouse and civil partner exemptions will still apply in many cases and some pension death benefits remain outside the scope of the reforms, the broader direction of policy is now clear. Pension wealth can no longer be treated separately from wider estate planning and inheritance tax risk.
In practice, the reforms are likely to create more pressure on executors, longer waits for beneficiaries and greater scope for inheritance disputes once pension wealth becomes part of the probate process.