The way a country taxes its residents on income earned abroad is one of the most important — and most frequently misunderstood — variables in international investment planning. The majority of the world’s countries operate a territorial tax system, or a variation of one. Understanding what territorial taxation means, how it applies to different income types, and how it interacts with your home-country tax obligations is foundational knowledge for any investor considering international diversification.
The Three Global Tax Systems
Countries tax their residents’ income through one of three primary frameworks:
Worldwide (Residence-Based) Taxation
Under a worldwide tax system, residents are taxed on all income regardless of where it is earned — domestically and internationally. Most developed countries use this system: the UK, Germany, France, Australia, Canada, and most EU states tax their residents on worldwide income. Double taxation treaties with other countries prevent the same income from being taxed twice, but the home-country tax right exists regardless.
Territorial Taxation
Under a territorial system, residents are taxed only on income earned within that country. Foreign-sourced income is not taxed by the country of tax residence. Panama, Georgia, Costa Rica, Nicaragua, Paraguay, Malaysia, Singapore (broadly), and the Philippines operate territorial tax systems.
For an investor who is tax resident in Panama and earns rental income from properties in Belize, Colombia, and Portugal, the Panamanian government does not tax that foreign rental income. Only income sourced within Panama is subject to Panamanian taxation.
Citizenship-Based Taxation
The United States is the only major country that taxes its citizens on worldwide income regardless of where they live or are tax resident. A US citizen living in Panama for 20 years, with no US income or assets, remains fully subject to US federal income tax on all worldwide income (subject to the Foreign Earned Income Exclusion and Foreign Tax Credit, which reduce but do not eliminate the obligation in many cases).
Territorial Tax Markets in the MPH Portfolio
Panama
Panama’s territorial tax system is one of its most significant attractions for internationally mobile investors. Only income generated from activities physically occurring within Panama is taxable. Rental income from properties outside Panama, dividends from foreign companies, capital gains from foreign asset sales — none of these are taxable in Panama for Panamanian tax residents.
Georgia
Georgia operates a modified territorial system. Employment income from Georgian sources is taxed at 20%. Capital gains from personal asset disposals (including real estate and cryptocurrency) are generally not subject to Georgian income tax for individuals. The Virtual Zone regime (1% flat tax on qualifying IT services businesses) is a specific business incentive.
Costa Rica
Costa Rica taxes only Costa Rican-sourced income. Foreign pension income, foreign investment income, and foreign rental income are not taxed for Costa Rican tax residents.
UAE
The UAE has no personal income tax, capital gains tax, or inheritance tax. This is a zero-tax jurisdiction rather than a strictly territorial one, but the outcome for individual investors is equivalent: no taxation on worldwide income, regardless of source.
Partial Territorial Systems and the NHR Legacy
Several countries offer regimes that approximate territorial taxation for qualifying residents without fully adopting territorial taxation as their standard system. Portugal’s original NHR (now closed to new applicants) exempted foreign-sourced income for qualifying residents. Italy’s EUR 100,000 flat tax regime for new residents provides a fixed annual tax on all foreign-sourced income regardless of amount. Malta’s Non-Dom Remittance Basis taxes foreign-sourced income only when remitted to Malta.
These regimes offer the practical benefit of territorial taxation for qualifying investors without requiring the investor to move to a traditionally territorial tax country.
The US Person Exception
For US citizens and green card holders, territorial tax planning requires an additional layer of consideration. Even if a US person becomes tax resident in Panama (a territorial tax jurisdiction), the US federal government retains the right to tax that person’s worldwide income by virtue of their US citizenship or permanent residence. The Foreign Earned Income Exclusion (approximately USD 126,500 in 2024) and the Foreign Tax Credit reduce this obligation, but US citizens cannot fully escape US worldwide taxation through territorial tax residency alone.
The only exit from US worldwide taxation is relinquishment of US citizenship (expatriation), which triggers an exit tax on unrealised gains above the exemption threshold. This is a significant and irreversible decision that requires careful legal and financial planning.
The Bottom Line
Territorial tax systems are the foundation of most international tax planning strategies for internationally mobile investors. Understanding which jurisdictions offer territorial taxation, what income types are included within “foreign-sourced” income under each country’s rules, and how this interacts with home-country obligations is the starting framework for legitimate tax efficiency through international structure. Professional tax advice in both the home and target jurisdiction is essential before any reliance on territorial tax treatment.