Getting it wrong can mean paying unnecessary tax, facing unexpected reporting obligations, or attracting attention from the tax authorities.
Some British expatriates assume they remain taxable only in the UK when they have in fact become Portuguese tax residents. Others believe they have automatically become Portuguese tax residents when they actually still fall under the UK rules.
Determining where you pay tax is not always straightforward. You have to understand and follow both the Portuguese and UK tax residence criteria and the double taxation treaty to ensure you meet your obligations. With today’s worldwide exchange of information between tax authorities, reporting errors or omissions are unlikely to go unnoticed.
Residency and taxation
If you are deemed to be tax resident in Portugal, you are liable to Portuguese taxation on your worldwide income and certain capital gains.
Portuguese income tax scale rates range from 12.5% to 48% in 2026, with an additional 2.5% or 5% for the highest earners. Investment income is taxable at 28% (35% if the assets are in a ‘tax haven’ territory), though Portugal also offers highly tax-efficient opportunities for appropriately held capital investments.
Other taxes apply regardless of residence, including property transfer tax, stamp duty and Additional Municipal Property Tax (AIMI) on Portuguese real estate exceeding €600,000 per individual.
Existing beneficiaries of Portugal’s former Non-Habitual Residence (NHR) regime may continue to benefit from its provisions until their 10-year term ends.
Identifying your tax residency
Portuguese tax residency is based on your circumstances rather than nationality or immigration status. The most straightforward test is the time spent in Portugal. If you are present here for 183 days or more during any 12-month period, you are generally regarded as a Portuguese tax resident. It’s also possible to be viewed as a tax resident if you maintain a home in Portugal in circumstances suggesting it is intended to be your habitual residence, even if you spend under 183 days here.
Family circumstances can be relevant. Where one spouse becomes Portuguese tax resident, the wider family situation may need to be considered, although different residency statuses can apply within the same household if supported by the facts.
Once you meet the residence criteria, it is your responsibility to register appropriately and submit an accurate annual income tax return.
If you have recently left the UK or retain connections with it, you also have to consider the UK’s Statutory Residence Test (SRT). This assesses factors such as time spent in the UK, whether you have a home there, where you work, and your personal ties to the country.
The importance of the tax treaty
Where an individual meets the residency tests of two countries at the same time, the relevant double taxation treaty becomes crucial.
The UK-Portugal treaty contains a series of tie-breaker provisions to establish a single country of tax residence. Factors include your permanent home location, your centre of personal and economic interests, and where you habitually live. Where necessary, nationality may be considered or the authorities may reach a mutual agreement.
Tax residence is not a matter of personal choice. You are either resident or non-resident according to the applicable rules. What you can do is take advice before relocating, consider the timing of your move, and regularly review your circumstances to avoid unintended consequences.
The tax treaty also determines where specific types of income and gains are taxable when you live in one country but receive income from another. A Portuguese tax resident would typically expect the following treatment of their UK assets:
- UK State Pension and most private pensions are generally taxable only in Portugal under the UK-Portugal double taxation treaty.
- UK government service pensions are generally taxable only in the UK.
- Rental income from a UK property remains taxable in the UK and Portugal and must be reported in Portugal, with relief available for UK tax paid.
- Capital gains on UK investment portfolios are generally taxable only in Portugal as the country of tax residence.
- Capital gains on UK real estate are taxable in the UK and Portugal, so also need to be declared in Portugal, with double taxation relief available where appropriate.
Take advice
Cross-border taxation can be complex. Not only must you understand Portugal’s rules, but you also need to consider how they interact with the UK tax system and that of any country where you hold assets.
Professional advice before and after you move will help ensure that you establish the correct residency status, meet all reporting obligations and structure your affairs in the most tax-efficient way for your circumstances.
Keep up to date on the financial issues that may affect you on the Blevins Franks news page at www.blevinsfranks.com.
The tax rates, scope and reliefs may change. Any statements concerning taxation are based upon our understanding of current taxation laws and practices, which are subject to change. Tax information has been summarised; an individual should take personalised advice.
By Christopher Moore, Partner, Blevins Franks