Why was the new double taxation treaty signed?
The UK—Portugal tax framework has not been revised after Brexit. The new convention is important for residents and companies on both sides and modernises a relationship long governed by a 1968 convention.
The treaty is signed but not yet in force and will apply after both countries complete internal ratification procedures. Once ratified, the provisions will take effect on the defined standard dates: in Portugal, from January 1st following entry into force; in the UK, from the first January 1st, April 6th, or April 1st following entry into force, depending on the tax type.
Key rates and rules under the new Portugal—UK double taxation treaty are as follows:
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dividends — 10% general cap; 15% for distributions from certain real-estate investment vehicles;
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interest — 10% general cap; 5% where the beneficial owner is a bank resident in the other state.
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royalties — 5% cap;
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pensions — taxable only in the state of residence.
What impact will the new DTC have on Portugal Golden Visa holders?
Most Golden Visa investors become Portuguese tax residents only if they spend more than 183 days a year in Portugal. The new convention does not change residency rules; it clarifies who taxes what—and at which capped rates—when income flows between the UK and Portugal.
UK dividends, interest and royalties received by a Portugal tax-resident investor should face the new capped source-country withholding rates, with Portugal providing relief under its domestic rules. Conversely, Portuguese-source payments to a UK-resident investor should observe the same ceilings, reducing friction on cross-border portfolios.
Pensions. For Golden Visa holders who become Portugal residents, private pensions are generally taxable only in Portugal; those remaining UK residents are generally taxed only in the UK. Government-service pensions follow special rules. This alignment reduces double-tax risk and helps with forward planning around retirement income.
