Do overseas property shares under £40,000 trigger the higher SDLT rates?

Introduction

People often ask whether owning a small share in a property abroad means they must pay the higher rates of Stamp Duty Land Tax (SDLT) when buying a home in England or Northern Ireland. This question commonly arises where spouses own overseas property interests, but each individual share is worth less than £40,000.

The answer usually turns on the value of the buyer’s beneficial interest in any other dwelling, not simply the total value of the property as a whole. Where each relevant share is worth less than £40,000, the higher rates may not apply. But the rules must be checked carefully, especially where spouses are involved.

The Question

A married couple are planning to buy a home in the UK. They already have interests in residential property overseas. They jointly own one overseas dwelling, but each person’s separate share is worth less than £40,000, even though the whole property is worth more than £40,000 in total. In addition, one spouse owns a share in another overseas dwelling, and that share is also worth less than £40,000.

The issue is whether those existing overseas property interests mean the couple must pay the higher rates of SDLT on their UK purchase.

Nick’s Explanation

Nick’s key point was that the higher rates depend on whether the buyer, or in some cases their spouse, has a major interest in another dwelling worth £40,000 or more anywhere in the world.

In anonymised form, his explanation was:

“The key factor is whether you or your spouse own any property, in the UK or abroad, valued at £40,000 or more. If each relevant share in the foreign properties has a market value of less than £40,000, that will usually mean those interests do not trigger the additional SDLT rates.”

That is broadly correct, but it helps to set out the legal framework more precisely. The question is not just whether there is another property somewhere in the world. It is whether, at the effective date of the transaction, a buyer is treated as owning a major interest in another dwelling with a market value of £40,000 or more, and whether the spousal rules bring the other spouse’s position into account.

The Law

The higher rates of SDLT for additional dwellings are contained in Schedule 4ZA to the Finance Act 2003.

In broad terms, the higher rates can apply where, at the end of the day of the purchase:

• the buyer is purchasing a major interest in a single dwelling,
• the chargeable consideration is £40,000 or more, and
• the buyer owns, or is treated as owning, a major interest in another dwelling worth £40,000 or more that is not subject to a lease with more than 21 years left to run.

For married couples and civil partners who are living together, Schedule 4ZA contains special rules. These rules can treat one spouse as having the other spouse’s property interests for the purpose of deciding whether the higher rates apply. That means a spouse’s existing dwelling interest can affect the SDLT position even if only one spouse is the legal owner of that other property.

The legislation also applies to dwellings located outside England and Northern Ireland. So overseas residential property can count.

The £40,000 test is important. It is not enough that the whole property is worth more than £40,000 if the relevant person only owns a share and that share itself is worth less than £40,000. The valuation exercise is directed at the interest actually held.

Analysis

There are several steps in analysing this sort of case.

First, identify the buyers of the UK property. If both spouses are buying together and they are living together, the spousal rules are likely to apply across both of them.

Second, identify every existing dwelling interest owned by either spouse anywhere in the world. That includes freehold interests, beneficial interests, and some leasehold interests.

Third, look at the market value of each spouse’s actual share, not merely the gross value of the whole overseas property. If a couple jointly own a dwelling worth £75,000 in total, that does not automatically mean each spouse has a £75,000 interest. If each spouse’s beneficial share is separately worth less than £40,000, that share may fall below the statutory threshold.

Fourth, apply the same approach to any additional property owned by one spouse alone. If that spouse’s actual interest in the second overseas dwelling is also worth less than £40,000, that interest may also fall outside the higher-rates test.

On the facts described, the position appears to be as follows:

• the jointly owned overseas dwelling has a total value above £40,000, but each spouse’s own share is below £40,000;
• the additional overseas dwelling share owned by one spouse is also below £40,000; and
• assuming those valuations are correct on the effective date of the UK purchase, neither spouse appears to hold another relevant dwelling interest worth £40,000 or more.

On that basis, the higher rates would usually not be triggered by those overseas interests.

However, this conclusion depends on the interests genuinely being worth less than £40,000 each. If a valuation later showed that one spouse’s share was actually worth £40,000 or more, the result could change. It is also necessary to check that the overseas interests are indeed residential dwellings and that there are no other relevant property interests held by either spouse.

If the future UK purchase raises questions about whether a building is uninhabitable or not suitable for use as a dwelling, that is a separate SDLT issue. In such cases, the threshold for showing that a property is not suitable for use as a dwelling is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

Outcome

Where each spouse’s separate overseas property interest is worth less than £40,000, those interests will usually not trigger the higher rates of SDLT on a UK residential purchase, even if the whole overseas property is worth more than £40,000 in total.

In the scenario described, the likely outcome is that the higher rates do not apply, provided the valuations are accurate and there are no other relevant dwelling interests.

Practical Steps

• Confirm exactly who will buy the UK property.
• List all residential property interests owned by either spouse anywhere in the world.
• Obtain a reasonable market valuation of each person’s actual beneficial share, not just the whole property value.
• Check whether any leasehold interests have more than 21 years left to run, as that can matter for the rules.
• Keep evidence of the valuations in case HMRC later questions the SDLT return.
• Review the position again shortly before exchange and completion, because values and ownership can change.
• If the property being bought may have mixed-use elements or habitability issues, take separate SDLT advice on those points.

Conclusion

For higher-rate SDLT purposes, the crucial question is the value of the buyer’s or spouse’s actual interest in another dwelling. If each overseas share is genuinely worth less than £40,000, the higher rates will usually not apply. The total value of the whole overseas property is not, by itself, decisive where the individual share is below the threshold.

Legal References Used

• Finance Act 2003, Schedule 4ZA
• Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799
• HMRC guidance on higher rates for additional dwellings

This page was last updated on 22 March 2026.

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