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The most tax-friendly countries for expats and retirees in 2026 — no-income-tax states, territorial-tax countries and special regimes — with how each actually taxes a foreigner who moves in.

US citizens are taxed on worldwide income no matter where they live. The Foreign Earned Income Exclusion (FEIE) and the Foreign Tax Credit (FTC) are the two main tools to avoid double taxation — here is how they differ and when to use each.

Portugal closed its famous NHR regime to new applicants in 2024 and replaced it with IFICI — the so-called 'NHR 2.0'. Here is who qualifies, the 20% rate, what foreign income is exempt, and the crucial catch on foreign pensions.

Tax residency — not citizenship or a visa — usually decides which country taxes you. Here is how the 183-day rule, permanent-home and centre-of-life tests work, and how treaty tie-breakers resolve dual residency.

A US totalization agreement stops you paying social-security taxes to both the US and your new country, and lets you combine work credits to qualify for benefits. Here is how they work and which popular destinations have one.

The difference between territorial and worldwide taxation decides whether your foreign pension, dividends and offshore income are taxed when you move abroad. Here is how each model works, with examples.