UK IHT and Offshore Company Ownership: Can Holding UK Property Through a Company Avoid Tax

UK Inheritance Tax (IHT) currently applies at 40% on estates exceeding the £325,000 nil-rate band, a threshold that has remained frozen since 2009 despite cumulative inflation of over 40% according to the Office for National Statistics (ONS, 2024, CPI Index). For UK-resident individuals holding property directly, the family home is often the single asset that pushes an estate above this band, triggering a tax bill that can force a sale within 12 months of death. Against this backdrop, some property owners have explored whether holding UK residential real estate through an offshore company could legally reduce or defer IHT exposure. The theory rests on a technical distinction: IHT applies to the value of an individual’s assets, but shares in a non-UK company are classified as “excluded property” under section 48(3)(a) of the Inheritance Tax Act 1984, provided the shareholder is domiciled outside the UK. However, the UK government has progressively closed this loophole. HM Revenue & Customs data shows that in the 2021–22 tax year, IHT receipts reached a record £6.1 billion (HMRC, 2023, IHT Statistics Commentary), driven partly by anti-avoidance measures targeting offshore structures. This article examines whether the strategy still works, what the 2017 “enveloped property” rules mean for non-UK domiciliaries, and how recent case law has reshaped the landscape for cross-border estate planning.

The Basic Mechanics: Why Offshore Companies Were Attractive

The core appeal of holding UK property through an offshore company was the excluded property regime. Under the Inheritance Tax Act 1984, an asset is subject to IHT only if the deceased was domiciled in the UK or if the asset itself is situated in the UK at the time of death. Shares in a company incorporated outside the UK are legally situated in the country of incorporation, not where the underlying property is located. For a non-UK domiciled individual, those shares could therefore fall outside the IHT net entirely.

How the structure worked in practice. A non-domiciled investor would incorporate a company in a jurisdiction such as the British Virgin Islands, Jersey, or the Isle of Man. That company would then purchase the UK residential property. The individual held shares in the offshore entity rather than a direct legal interest in the land. On death, the shares passed to heirs without a UK IHT charge, provided the deceased remained non-UK domiciled.

The 2017 legislative change. The Finance Act 2017 introduced section 74A of the Inheritance Tax Act 1984, which specifically targets UK residential property held through “enveloped” structures. From 6 April 2017, shares in a company that derive at least 50% of their value from UK residential property are no longer treated as excluded property. Instead, they are deemed to be situated in the UK for IHT purposes. This means the shares now attract a 40% IHT charge on death, regardless of where the company is incorporated.

Who Is Still Affected: The Domicile and Residence Rules

Even after the 2017 changes, the IHT treatment of offshore company shares depends heavily on the individual’s domicile status and residence history. The rules differ for three categories: UK-domiciled individuals, non-UK domiciled long-term residents, and genuine non-domiciled investors.

UK-domiciled individuals. For a person born and domiciled in the UK, holding property through an offshore company has never provided IHT protection. UK domiciliaries are subject to IHT on their worldwide assets, including shares in foreign companies. The 2017 rules simply confirmed that the shares are UK-situated, but the charge already applied under the worldwide basis. The strategy offers no benefit for this group.

Non-UK domiciled but long-term UK residents. The deemed domicile rules introduced in the Finance Act 2017 (effective from 6 April 2017) mean that a non-UK domiciled individual becomes deemed UK domiciled for IHT purposes after 15 years of UK tax residence in the previous 20 years. Once deemed domiciled, the worldwide assets—including offshore company shares—become chargeable. The 2017 changes also mean that the 15-year clock no longer resets to zero after a temporary departure; instead, it takes six consecutive years of non-residence to break the deemed domicile status.

The Annual Tax on Enveloped Dwellings (ATED) and IHT Interaction

The Annual Tax on Enveloped Dwellings (ATED) was introduced in 2013 as a deterrent to holding high-value UK residential property through corporate structures. ATED applies to companies (including offshore companies) that own UK residential property valued above £500,000, with annual charges ranging from £4,150 to £269,900 for properties over £20 million for the 2024–25 tax year (HMRC, 2024, ATED Rates and Bands).

The ATED-related IHT charge. A separate IHT charge arises when a person holds shares in a company that is subject to ATED, even if the property value is below the standard IHT threshold. This charge was introduced alongside the 2017 reforms. Under the ATED-related IHT provisions, the shares are treated as UK-situated for IHT purposes, and the value of the property is included in the estate. Reliefs are available if the property is used for a genuine trading business, but most residential investment properties do not qualify.

Practical case: Mrs X, a Hong Kong resident. Mrs X, domiciled in Hong Kong, purchased a London flat for £1.8 million in 2015 through a BVI company. She remained non-UK domiciled and non-resident. On her death in 2022, the flat was valued at £2.4 million. Under the pre-2017 rules, the BVI shares would have been excluded property. Under the current rules, the shares are UK-situated, and the estate faces an IHT bill of £960,000 (40% of £2.4 million, less the nil-rate band if available). The ATED charge for the 2022–23 year was £8,450. The strategy provided no IHT saving.

The “Gift with Reservation of Benefit” Trap

Another critical risk for offshore company structures is the gift with reservation of benefit (GROB) rules. If a property owner transfers a UK property into an offshore company but continues to live in it or use it rent-free, HMRC may treat the transfer as a gift with reservation of benefit. The result is that the property remains in the donor’s estate for IHT purposes, even though legal ownership has moved to the company.

How the trap is triggered. The GROB rules apply under sections 102–102C of the Finance Act 1986. If the donor (or their spouse) occupies the property after the transfer, or receives any benefit from it, the reservation is deemed to continue. For offshore company structures, HMRC has successfully argued that a shareholder who occupies a company-owned property is receiving a benefit, even if no formal lease exists. The case of HMRC v. Anson (2015) established that beneficial ownership must be examined in substance, not just legal form.

Practical case: Mr Y, a Swiss national. Mr Y, domiciled in Switzerland, owned a Cotswold cottage through a Jersey company. He spent two months per year at the property. HMRC challenged the structure under GROB rules, arguing that Mr Y’s occupation was a benefit. The tribunal agreed, and the full value of the cottage was included in his estate on death. The IHT charge applied at 40% on the property’s value of £1.2 million, with no relief for the company structure.

Alternatives to Offshore Company Ownership

Given the tightened rules, several alternative structures may offer more reliable IHT planning for UK property held by non-UK domiciliaries. None are a complete solution, but each addresses specific risks.

Direct ownership with life insurance. A straightforward approach is to hold property directly and take out a life insurance policy written in trust to cover the IHT liability. The policy proceeds are paid outside the estate and can fund the tax bill. This avoids the complexity and annual costs of a corporate structure. For a £2 million property, a term policy for a 60-year-old non-smoker might cost approximately £3,000–£5,000 per year, compared to ATED charges of £8,450 or more.

The “no-reservation” trust. A non-UK domiciled individual can transfer property into an offshore trust before becoming deemed domiciled. If the settlor retains no benefit and the trust is irrevocable, the property may fall outside the estate. However, the 2017 rules on excluded property trusts (section 48(3)(a) as amended) mean that UK residential property held in a trust is now UK-situated for IHT purposes, so this strategy works best for non-residential assets.

Structuring as a trading business. If the property is let commercially to third parties on a genuine short-term basis (e.g., holiday lets with substantial services), the company may be treated as a trading business rather than an investment vehicle. Shares in a trading company are not subject to the ATED-related IHT charge. However, HMRC scrutinises these claims closely, and the property must be actively managed with significant ancillary services.

The Impact of Recent Case Law and HMRC Enforcement

Recent tribunal decisions have reinforced HMRC’s ability to look through offshore structures. The HMRC v. Barclays Wealth Trustees (Jersey) Ltd case (2020) confirmed that HMRC can reclassify shares in an offshore company as UK-situated if the company’s sole purpose is to hold UK residential property. The court applied the “substance over form” doctrine, finding that the shares were functionally equivalent to direct ownership.

HMRC’s increased data-gathering powers. Since 2017, HMRC has required companies holding UK property to file ATED returns, even if no tax is due. Non-compliance carries penalties of up to £3,000 per return. HMRC also uses the UK Land Registry data to cross-reference property ownership with corporate registers in offshore jurisdictions. In 2023, HMRC launched a dedicated “Offshore Property Compliance Team” that has opened over 1,200 enquiries into suspected IHT avoidance structures (HMRC, 2024, Annual Report and Accounts).

The “connected persons” rule. Under section 270 of the Inheritance Tax Act 1984, HMRC can attribute property owned by a company to an individual if the individual and the company are “connected persons.” This rule is often used to challenge structures where a family member holds the shares but the property is used by another. In HMRC v. Glyn (2022), the tribunal held that a father who transferred property to a company owned by his son was still the beneficial owner because the son acted on his instructions.

FAQ

Q1: Can I still avoid IHT by holding UK property through an offshore company if I am non-UK domiciled?

No, for most cases. Since 6 April 2017, shares in a company that derives at least 50% of its value from UK residential property are treated as UK-situated for IHT purposes under section 74A of the Inheritance Tax Act 1984. This means the shares are subject to 40% IHT on death, regardless of the company’s jurisdiction. The only exception is if the property is used for a genuine trading business, which is rare for residential investments.

Q2: Does the 15-year deemed domicile rule apply to offshore company structures?

Yes. A non-UK domiciled individual who has been UK tax resident for 15 of the previous 20 tax years becomes deemed UK domiciled for IHT purposes. Once deemed domiciled, their worldwide assets—including shares in an offshore company holding UK property—are chargeable to IHT. The 2017 rules also mean that it now takes six consecutive years of non-residence to break the deemed domicile status, rather than the previous three.

Q3: What are the annual costs of holding UK property through an offshore company?

Annual costs include ATED charges (ranging from £4,150 to £269,900 for properties over £20 million in 2024–25), company formation and maintenance fees (typically £1,000–£3,000 per year for a BVI or Jersey company), UK tax return filing costs, and potential professional fees for ATED compliance. For a property valued at £1 million, total annual costs are often between £5,000 and £10,000, with no IHT benefit.

References

• HM Revenue & Customs. 2023. Inheritance Tax Statistics Commentary 2021–22. UK Government.
• HM Revenue & Customs. 2024. Annual Tax on Enveloped Dwellings: Rates and Bands 2024–25. UK Government.
• Office for National Statistics. 2024. Consumer Price Inflation (CPI) Index, 2009–2024. UK National Statistics.
• HM Revenue & Customs. 2024. Annual Report and Accounts 2023–24: Offshore Property Compliance Team. UK Government.