Navigating the challenges of Dual Tax Residency

It is not uncommon for expats to find that the UK tax office maintains an interest in income that they had assumed was dealt with entirely overseas. A letter from HMRC arrives, questions are raised, and what seemed like a clean departure from the UK turns out to be rather more complicated. If this sounds familiar, you are most likely dealing with a situation of dual residence, and understanding how double taxation agreements work is the starting point for resolve.

Dual residence and the UK connection

Every country has its own rules for determining whether you are tax resident there. In the UK, that determination is made using the Statutory Residence Test (SRT), introduced under Finance Act 2013, Schedule 45, which looks at the number of days you spend in the UK and the ties you maintain there.

Your home, your family, your work and many other matters can be considered by HMRC in deciding whether you have retained your UK residence despite moving abroad.
The difficulty arises when a departure from the UK does not result in a clean break. If you have not fully satisfied the conditions for non-residence under the SRT, perhaps because you are spending more days in the UK than permitted, or because you retain ties that count against you, you may find yourself treated as resident in both the UK and your new country simultaneously, with both claiming the right to tax your worldwide income. Where this situation arises, the starting point is to establish whether a double taxation agreement exists between the UK and your new country of residence, because if one does, it will provide the framework for determining how your income is taxed and by whom.

For many people, this comes as a genuine surprise, and in a number of cases, it is a situation that could have been avoided entirely with the right advice before leaving. Understanding your position under UK residency laws at the point of departure, rather than after you have left, can produce a more straightforward and less costly outcome.

The first function of a double taxation agreement

The UK has one of the largest networks of double taxation agreements in the world, and we find that many clients are surprised to learn that these treaties serve two quite distinct functions. The first is to allocate taxing rights over specific income streams between the country where you are resident and the country where your income originates. This operates independently of whether you are a dual resident or not.

Your UK rental income will remain taxable in the UK regardless of where you live. Indeed the UK retains primary taxing rights over UK property income under virtually every treaty. Your country of residence may also seek to tax that income as part of your worldwide income, but where a double taxation agreement exists, it will provide a credit for the UK tax already paid, ensuring you do not bear the full burden twice.

Pension, employment, dividend and interest income each have their own treaty articles, and the position varies depending on the specific agreement in force between the two countries concerned. This is why it is always important to consider the particular treaty that applies to your situation, rather than assuming that a general rule will cover you.

The second function of a double taxation agreement

The second function of a double taxation agreement is to resolve dual residence issues. Where two countries are treating you as a tax resident at the same time, the treaty provides a tie-breaker clause, typically found in Article 4 of the OECD Model Convention, on which the vast majority of the UK’s treaties with other countries are based. This clause determines which country is to be treated as your country of residence for treaty purposes.

The tie-breaker works through a sequence of tests applied in order: first, in which country you have a permanent home available to you; then, where your centre of vital interests lies; then habitual abode; and finally nationality. Each of these terms carries its own definition under the treaty framework, and the analysis can be more involved than the common meanings suggest.

The tie-breaker determines treaty residence only. It does not alter your residence status under the domestic law of either country, you remain resident in both under their respective rules. What it does is determine which country’s treaty reliefs, exemptions and taxing rights apply, and that distinction matters enormously in practice.

Where no treaty exists

Not every country has a double taxation agreement with the UK, and where none exists, the position is considerably more complex. Without a treaty framework, both countries may tax the same income in full under their domestic rules, with the only available relief being unilateral double tax relief under UK legislation, specifically TIOPA 2010, sections 8 to 17, which provides a credit for foreign tax paid. This offers less comprehensive protection than a full treaty.

How we help

The matter of residence is rarely straightforward, and the consequences of getting it wrong, whether through an incorrect treaty claim, an overlooked relief, or a misunderstanding of which country holds primary taxing rights, can result in significant overpayment or an unexpected liability in one or both jurisdictions.
As experienced tax agents to the expat community, we work through the position carefully with each client, establishing the correct analysis and ensuring that every available relief is claimed in the right place, at the right time and in the right way. If you have received correspondence from HMRC that you do not fully understand, or if you are simply not sure which country you should be paying tax in, we would be very happy to help you make sense of it.

Unsure of whether you might be a dual resident? Get in touch and we will help you to ensure you are not paying more than you should.