🇵🇹 COUNTRY A Portugal VS 🇬🇧 COUNTRY B UK

The UK hosts one of the largest Portuguese diaspora communities in Europe — approximately 350,000–450,000 Portuguese nationals, making it the third or fourth largest Portuguese community outside Portugal (behind France and Switzerland). The community is concentrated in London (particularly Stockwell, Vauxhall, Lambeth — the area around Stockwell tube station is sometimes called 'Little Portugal'). Significant communities also exist in Reading, Slough, Swindon, and other commuter belt towns. Pre-Brexit, Portuguese nationals had full freedom of movement in the UK. Those who lived in the UK before 31 December 2020 were eligible for the EU Settlement Scheme (EUSS), granting Settled Status (5 years' residence) or Pre-Settled Status (less than 5 years). New arrivals after that date need a Skilled Worker Visa or other route.

Generally no — the UK-Portugal Double Taxation Agreement prevents double taxation. Once you become a UK tax resident (usually after 183 days in the UK in a tax year, or meeting other UK residence tests under the Statutory Residence Test), you pay UK income tax on UK-source employment income. Portugal taxes residents on worldwide income — if you become a non-resident of Portugal, you generally only owe Portuguese tax on Portugal-source income (rental income, Portuguese pensions, business income from Portugal). The key transition: when you move from Portugal to the UK, you need to formally notify the Portuguese tax authority (Autoridade Tributária e Aduaneira) of your change of residency and file a final Portuguese IRS return for the year of departure. After that, you're liable to UK tax as a UK resident, with Portugal only taxing any remaining Portuguese-source income.

Portugal's IRS brackets (2024): 0% on approximately the first €7,703; 13% to €11,623; 18% to €16,472; 23% to €21,321; 26% to €27,146; 32.75% to €39,791; 37% to €51,997; 43.5% to €81,199; 46% to €250,000; 48% above €250,000. UK income tax (2025/26): 0% on the first £12,570 (personal allowance); 20% on £12,571–£50,270 (basic rate); 40% on £50,271–£125,140 (higher rate); 45% above £125,140 (additional rate). Personal allowance tapers to zero between £100,000–£125,140 creating a 60% effective marginal rate in that band. The UK's personal allowance (£12,570 ≈ €15,000) is considerably more generous than Portugal's effective zero-rate threshold (~€7,703). Portugal's intermediate rates (13–32%) are lower than UK's 40% higher rate but the thresholds at which those rates apply are lower.

The EU Settlement Scheme (EUSS) allowed EU nationals — including Portuguese — who lived in the UK before 31 December 2020 to apply for Settled or Pre-Settled Status. Settled Status: granted to those with 5+ years of continuous UK residence — gives the right to live, work, and access public services (including NHS, benefits) in the UK indefinitely. Pre-Settled Status: for those with less than 5 years' UK residence — gives temporary 5-year leave to remain, during which the holder can complete 5 years and upgrade to Settled Status. EUSS holders pay UK income tax and NI in the same way as British citizens. For Portuguese nationals who moved to the UK after 31 December 2020: a Skilled Worker Visa (requiring a job offer at the relevant skill level and salary threshold, typically £26,200 minimum) or another visa category is required.