Holding UK property through an offshore company: what still works in 2026

The old appeal, and what changed

Before 2013, an offshore company holding UK residential property was almost comically effective as a tax-planning vehicle. The property sat inside a non-UK entity, so on the death of the beneficial owner, no UK inheritance tax arose because the asset being transferred was shares in a foreign company, not UK land. Capital gains tax did not apply to non-residents disposing of UK property. Stamp duty was payable only once, when the property was first acquired, and subsequent share transfers attracted no charge at all.

HMRC and successive governments recognised this was draining substantial revenue. The response came in waves. The Annual Tax on Enveloped Dwellings (ATED) arrived in 2013. Non-resident capital gains tax on residential property followed in 2015, then expanded to commercial property in 2019. The Finance Act 2017 brought UK residential property held through offshore structures into the inheritance tax net. Each reform chipped away at a different advantage, and the April 2025 non-dom overhaul removed perhaps the last major shelter. The key changes for 2026 confirm that the compliance burden for offshore property holders has never been heavier.

ATED: the annual charge on enveloped residential property

ATED is an annual charge on UK residential properties worth more than £500,000 that are held within a "corporate envelope," meaning a company, a partnership with a corporate member, or a collective investment scheme. The charge is not trivial. For the 2025-26 tax year, a property valued between £500,001 and £1 million attracts an annual ATED charge of around £4,450, while properties valued above £20 million face charges of over £290,000 per year.

Those figures alone are enough to make many investors reconsider the structure. There are reliefs available: property rental businesses, property developers, and property traders can all claim exemptions, but you must file an ATED return and actively claim the relief each year. Miss the filing deadline and you face penalties even if the relief would have applied. The charge is based on HMRC's mansion tax valuation bands, which are revalued periodically, so a property that was below the threshold at purchase can drift into ATED territory over time.

For a genuine property rental business operated through an offshore company, the ATED relief means the charge is neutralised. But for a property held as a personal residence or left vacant, the annual cost is real and recurring.

Non-resident capital gains tax on UK property

Since April 2019, all non-UK residents, whether individuals, companies, or trusts, pay capital gains tax when they dispose of UK property. For companies, this is charged at the corporation tax rate, currently 25%. The old trick of selling shares in the offshore company rather than the property itself has been blocked: HMRC treats disposals of shares deriving 75% or more of their value from UK land as indirect disposals, and these are also subject to non-resident CGT.

There are limited exceptions. If the company holds the property as trading stock (a genuine development or dealing business), the gain is taxed as trading income rather than capital gains, which may produce a different result but does not eliminate the charge. The reporting obligations are strict: a CGT return must be filed within 60 days of completion, and the tax must be paid at the same time. Overseas companies are also required to register with Companies House and meet ongoing disclosure obligations, adding another layer of administration.

The practical effect is that holding UK property offshore no longer provides any capital gains advantage. The tax rate is the same, the reporting is more complex, and the compliance costs are higher.

Inheritance tax on UK residential property held offshore: the April 2017 change

Before April 2017, a non-domiciled individual could hold UK residential property through an offshore company and keep it outside the UK inheritance tax net entirely. The property was "excluded property" because the relevant asset for IHT purposes was the foreign company shares, not the underlying UK land. The Finance (No. 2) Act 2017 closed this by introducing a "look-through" rule. HMRC now treats the value of UK residential property as part of the estate for IHT purposes, regardless of how many corporate layers sit between the individual and the bricks.

This applies to direct and indirect holdings. If a BVI company owns a Jersey company that owns a UK house, HMRC looks through the entire chain and charges IHT at 40% on the property value above the nil-rate band. The rule catches loans used to acquire UK residential property too: if an offshore entity lent money to fund the purchase, the loan itself can be treated as deriving its value from UK residential property.

For US citizens, the UK-US estate and inheritance tax treaty provides some relief by allowing a unified credit, but this is specific to US nationals and does not help investors from other jurisdictions. The IHT exposure is now essentially the same whether you hold the property personally or through an offshore company, which removes one of the original core reasons for using the structure. Planning around this requires careful consideration of domicile status and treaty positions, not simply wrapping property in a company.

What the April 2025 non-dom reform changed

The April 2025 reforms replaced the remittance basis of taxation with a new residence-based regime. Individuals in their first four years of UK residence, after at least ten consecutive years of non-residence, can claim an exemption on foreign income and gains during that window. After that window closes, worldwide income and gains are taxed in the UK regardless of domicile.

For offshore property holding, the key impact is on the IHT side. The old concept of "deemed domicile" (after 15 out of 20 years of UK residence) has been replaced. Under the new rules, anyone who has been UK resident for ten out of the previous twenty years falls within the UK IHT net on their worldwide assets. There is also a tail of between three and ten years after leaving the UK, depending on how long you were resident, during which worldwide assets remain exposed to IHT.

This matters because many offshore property structures were designed around the assumption that the beneficial owner would remain non-domiciled and therefore outside the IHT net for foreign assets. The new rules make UK residence the trigger, not domicile. An investor who has lived in the UK for a decade can no longer rely on non-dom status to keep offshore assets, including the shares in a property-holding company, outside IHT. The practical result is that more people are now caught by UK IHT than before, and the offshore wrapper provides no additional protection.

When an offshore holding structure still makes sense

Despite everything above, there are situations where holding UK property through an offshore company remains a rational choice. These tend to be commercial rather than tax-driven.

• Genuine property rental or development businesses with multiple investors benefit from the limited liability and governance framework a corporate structure provides. ATED relief applies, and the company pays corporation tax on rental profits at 25%, which may be preferable to higher-rate income tax for individual investors.
• Multi-jurisdictional investment funds that hold diversified property portfolios across several countries often use offshore holding companies for operational reasons: centralised management, standardised reporting, and simplified investor entry and exit.
• Privacy and succession planning can still favour a corporate structure in some cases, particularly where the beneficial owners are in jurisdictions with forced heirship rules that conflict with English property law.
• Properties valued under the ATED threshold (below £500,000) held for rental purposes face no annual charge, though the administrative costs of maintaining the offshore company may outweigh the benefits.

What does not work is using an offshore company purely to reduce UK tax. The tax advantages have been systematically removed, and the compliance costs of maintaining the structure, including ATED returns, corporation tax filings, Companies House registration, and annual accounts, can easily run into thousands of pounds per year.

Cosmos works with international investors and business owners who need to understand exactly where the line sits between a well-structured holding arrangement and an expensive relic of outdated planning. The right structure depends on your specific circumstances: your tax residence, the property's use, and your long-term intentions.

Get advice before you act

If you already hold UK property through an offshore company, the worst thing you can do is nothing. The rules have changed fundamentally since many of these structures were established, and a structure that saved tax in 2012 may now be costing you money in compliance fees, ATED charges, and unnecessary complexity. Unwinding a structure has its own tax consequences: transferring property from a company to an individual can trigger SDLT, CGT, and potentially ATED-related CGT charges, so the exit needs to be planned carefully.

If you are considering buying UK property through an offshore company in 2026, start with a clear-eyed assessment of what the structure actually achieves. If the answer is "not much beyond habit and a vague sense that offshore means tax-efficient," it is time to rethink. Cosmos can help you model the real costs of maintaining an offshore holding structure against the alternatives, so you make decisions based on current law rather than outdated assumptions. The mansion tax debate and ongoing political pressure on overseas ownership mean further changes are always possible, which makes getting your structure right now more important than waiting.

Speak to a qualified cross-border tax adviser, get the numbers in front of you, and then decide. That is the only approach that still works.