The UK government has not introduced a general wealth tax, but its strategy for taxing accumulated wealth is growing more aggressive. The Autumn Budget 2026 did not implement a broad-based annual levy, yet it has widened the tax base in ways that will disproportionately affect globally connected families. By freezing the inheritance tax nil-rate band at £325,000 through the 2030–31 tax year, nominal asset growth will push more estates into higher tax brackets, even though the headline rate remains unchanged. Additionally, a new High Value Council Tax Surcharge (HVCTS) will begin targeting high-net-worth property owners in April 2028.
The UK’s approach contrasts with traditional wealth taxes, which typically tax an individual’s total net assets regardless of income. These taxes have declined globally: in 1990, 12 OECD countries imposed them, but only four still do today. Their disappearance stems from low revenue yields, administrative difficulties, and concerns about economic efficiency.
Countries that retain or have adapted wealth taxes offer relevant insights for the UK. Switzerland continues to apply wealth taxes at cantonal and municipal levels. Studies indicate that taxable wealth adjusts to varying rates, though migration accounts for only part of the response. Norway, another holdout, has seen some wealthy individuals relocate, but no significant decline in investment from businesses owned by those who left. France replaced its general wealth tax with the Impôt sur la Fortune Immobilière, a property-focused levy. In 2024, this tax generated €2.2 billion from approximately 186,000 households with declared real-estate assets worth €467 billion.
Read Also: UK courts clarify rules for planning disputes after Curzon rulings
How other nations tax wealth without broad levies
These cases demonstrate that wealth taxation need not be an all-or-nothing proposition. Governments can focus on specific wealth forms—such as property or private company holdings—without enforcing a broad-based tax. The UK’s recent measures, though structurally different, follow a similar principle: they increase taxation of accumulated wealth without requiring a formal net wealth tax.
The UK is also expanding its tax base for private wealth in other ways. Beginning April 6, 2025, inheritance tax will shift from domicile to long-term UK residence as the primary criterion for taxing overseas assets. Under this rule, individuals who have lived in the UK for at least 10 of the past 20 years will face UK inheritance tax on both domestic and foreign holdings. This exposure can persist for three to ten years after they leave the country, depending on their residency history.
Another change, effective April 6, 2027, will include most unused pension funds and pension death benefits in inheritance tax calculations. Combined with frozen thresholds, these adjustments explain why internationally connected families are paying closer attention to how wealth is taxed both during life and at death.
Read Also: UK considers rights for unmarried couples
The UK’s domestic tax rules are not definitive. The country has a limited network of estate-tax treaties, and some older agreements still prioritise domicile over residence. For example, the UK–Italy Estate Duty Convention can override domestic changes, influencing taxing rights and double-tax relief even after the shift to long-term residence.
UK’s estate-tax treaties complicate global wealth planning
Treaty protections are not automatic. Relief depends on residency history, domicile status, asset location, and the specific terms of each convention. For globally mobile families, these nuances are critical. Moving abroad does not guarantee tax advantages, nor does it ensure that a business or trust structure will follow. The broader question is not whether the UK has a wealth tax, but which countries can tax accumulated wealth, under what conditions, and how treaties may alter the outcome.
Tax Treaty Considerations and Residency Nuances
The UK’s estate-tax treaties may still apply under certain older agreements, where domicile, not just residence, determines tax obligations. These conventions can override domestic rules, affecting which country taxes assets and how double taxation is relieved. For example, the UK–Italy Estate Duty Convention retains domicile as a key factor in some cases.
Read Also: High Court ruling complicates England’s planning committee reforms
Treaty protections are not guaranteed. Whether relief applies depends on factors like residency history, where assets are held, and the specific terms of each agreement. Relocating an individual does not automatically shift a company’s tax status, alter an asset’s location for tax purposes, or change how trusts are treated.
Residency rules and treaties reshape cross-border tax burdens
International comparisons show that wealth tax outcomes depend on design, mobility, and family circumstances, not just the presence of a tax. The UK’s evolving approach reflects these complexities, with residency and treaty interactions playing a larger role than domestic policy alone.
