Chancellor Rachel Reeves has reshaped the UK tax landscape across two consecutive Autumn Budgets, leaving many British households caught in a series of costly traps.
Changes have included an extended freeze on income tax thresholds, a hike to dividend tax, and a new levy on properties valued at £2m or more.
Inheritance tax has proven the most contentious of the reforms, with 100 per cent Business relief now capped at £2.5m per property, stripping away longstanding exemptions.
From April 2027, unused pension funds and lump-sum death benefits will also be drawn into the inheritance tax net, prompting growing alarm among families.
The prospect of these changes has triggered a wave of Brits leaving the country, though moving abroad does not necessarily shield them from UK tax obligations.
Financial advisory firm deVere Group has warned that roughly 4.8 million Britons living overseas could still face exposure to inheritance tax under the revised rules.
Nigel Green, chief executive of deVere, said: “A huge number of Britons abroad still believe leaving the UK automatically protects them from inheritance tax.”
Green added that “for many people, this assumption is becoming dangerously outdated,” pointing to widespread misunderstanding of how the reformed system now operates.
The abolition of the non-dom regime in April 2025 sits at the heart of the confusion, according to deVere, as it previously offered meaningful protection from inheritance tax for qualifying individuals.
The non-dom regime was replaced by a residence-based foreign income and gains system, shifting the focus from an individual’s domicile status to the number of years they have lived in the UK.
Under the new framework, anyone who has been a UK tax resident for 10 of the last 20 years falls fully within the scope of inheritance tax on their worldwide assets.
That threshold represents a drop of five years compared to the prior regime, rapidly accelerating inheritance tax exposure for those who have recently moved to the UK.
Former UK residents who have departed the country can also remain within the tax net for up to 10 tax years after leaving, depending on the length of their prior residency.
Those who lived in the UK for between 10 and 13 years face a three-year tail period during which their non-UK assets remain within the inheritance tax remit.
For individuals with more than 13 years of prior UK residence, the tail extends by one additional year for each extra year lived there, up to a maximum of 10 years.
Green noted that many expats still believe their “tax exposure ends the moment they move overseas,” leaving them potentially unprepared for significant liabilities.
Even short-term moves carry risk, as the statutory residence test applies across the full tax year rather than from the precise date of departure, catching some individuals off guard.
The test weighs the number of days spent in the UK alongside factors such as work ties, living arrangements, and family connections when determining tax residence status.
The inheritance tax changes are particularly painful for retirees, with pension wealth set to face a 40 per cent inheritance tax charge from 2027 regardless of where a pensioner is living.
British expats in Spain who meet the 10 out of 20 residency rule face 40 per cent inheritance tax on worldwide estates, while Spain will simultaneously claim tax on those estates as a Spanish resident.
France presents additional complications, with forced-heirship rules legally requiring expats to reserve a defined portion of their estate for their children, potentially overriding UK wills.
Green said: “International families are entering a much tougher planning environment,” warning that “Britain is tightening the inheritance tax net around internationally mobile individuals, and the window for action is closing fast.”
Retirees relocating abroad also risk losing access to the UK’s triple lock, which guarantees the state pension rises each year by inflation, average earnings growth, or a minimum of 2.5 per cent.
In countries including Canada, Australia, and New Zealand, UK state pension payments are frozen at the rate first received, with no future increases applied.
According to wealth manager Rathbones, pensioners living overseas for 20 years could lose up to £77,585 in state pension income as a result of the frozen payment policy.
Around 450,000 pensioners living abroad are already affected by the frozen pension arrangement, with significant private savings required to replace the lost income.