UK inheritance tax (IHT) is an area where the rules for expats changed materially from April 2025 and will change again from April 2027. Understanding both changes is central to estate planning for internationally mobile individuals.
The long-term resident test (from April 2025). Previously, UK IHT exposure was primarily determined by domicile: a concept tied to where you consider your permanent home to be, which is difficult to change and requires sustained evidence of intention to settle permanently elsewhere. From April 2025, a parallel test applies: the long-term resident test. If you have been UK resident for 10 of the previous 20 tax years, you are treated as a long-term UK resident for IHT purposes, and your worldwide assets come within the scope of UK IHT regardless of your domicile status.
The long-term resident test carries a tail: even after you cease UK residence, the status does not end immediately. Depending on how many years of UK residence you have accumulated above the 10-year threshold, long-term resident status may continue for between three and ten years after your departure date. This means individuals who have left the UK may retain worldwide IHT exposure for several more years, even if they are no longer UK resident by any other measure.
Current thresholds, frozen to April 2030. The nil-rate band (NRB) remains GBP 325,000 per individual and the residence nil-rate band (RNRB) remains GBP 175,000, giving a combined maximum of GBP 500,000 per individual (or GBP 1,000,000 for married couples and civil partners where the full RNRB applies). Both thresholds are frozen until at least April 2030. Given asset values in general and property values in particular, many estates that were once below the IHT threshold are now within scope.
The April 2027 pension-IHT change (Finance Act 2026). This is law. From April 2027, most unused defined contribution pension funds and certain lump sum death benefits will be brought within the scope of UK inheritance tax. Under the previous rules, pension assets typically did not form part of the taxable estate, making them one of the most commonly used structures for intergenerational wealth transfer. After April 2027, that exemption will largely end for UK IHT purposes. The practical implication: individuals whose pension and estate assets combined exceed the available nil-rate thresholds face a new IHT liability on pension wealth that did not previously exist. The pension-IHT projection tool at /tools/pension-iht-projection allows you to model the combined position. The IHT illustrator at /tools/iht covers the broader estate position.
Planning responses to these rules vary by individual circumstances and may include gifting strategies, trust structures, pension drawdown sequencing, or domicile reviews. Any of these responses require regulated advice from a specialist who understands both UK IHT law and the tax treatment in your country of residence.