Foreign Income Taxation: Frequently Asked Questions
How a country treats income from outside its borders is often more important than the headline tax rate. Worldwide, territorial, remittance-based, and exempt systems each create very different planning outcomes.
Data as of 2026. Sources: OECD, PwC, KPMG, Tax Foundation. Not advice.
What are the four main systems for taxing foreign income?
Worldwide (all foreign income taxed, US/India/most of Europe), Territorial (only domestic-source income taxed), Remittance-based (foreign income only taxed when brought in), and Exempt (foreign income explicitly exempt for certain residents/regimes). Each has different planning implications.
Which countries use worldwide taxation?
Worldwide systems tax residents on income from any source. TaxAtlas-tracked countries include Australia, Bulgaria, Canada, Cyprus, Estonia, France, Germany, Gibraltar, Greece, and Guernsey.
Which countries use territorial taxation?
Territorial systems exempt foreign-source income. Tracked jurisdictions: Costa Rica, Georgia, Hong Kong, Hungary, Malaysia, Panama, Paraguay, Philippines, Singapore, and Thailand.
Which countries use remittance-based taxation?
Remittance-based systems tax foreign income only when remitted. Malta and Ireland (for non-domiciles) are the main examples in TaxAtlas-tracked countries.
Does the US really tax citizens worldwide?
Yes. US citizens and green-card holders are taxed on worldwide income regardless of residency. FEIE (Foreign Earned Income Exclusion, $130,000 for 2026) and Foreign Tax Credit mitigate double tax, but filing is mandatory even from zero-tax countries.
What's the difference between non-dom and non-resident?
Non-resident means you don't meet tax residency tests. Non-dom (used in UK, Ireland, Malta, Cyprus) means you're resident but your "domicile" — broadly, your long-term home — is elsewhere. Non-dom status usually triggers remittance-basis or special-regime tax treatment.
Can I move my income offshore to avoid tax?
Not legally if you're still tax resident in a worldwide system. CFC (Controlled Foreign Corporation), GILTI (US), and similar anti-deferral rules tax phantom income from offshore companies you control. Special tax regimes (NHR 2.0, Italy €100k flat, Greek lump-sum) are legal alternatives.
Are tax treaties relevant for foreign income?
Yes. A treaty between your residence country and the source country usually reduces or eliminates double taxation through credits, exemptions, or reduced withholding rates. The OECD Model Treaty is the template most bilateral treaties follow.
Need help turning the data into a plan?
TaxAtlas covers the rates and rules. For the personal side — exit planning, residency strategy, business structure, or filings — request a response and we'll point you to relevant research or a vetted specialist.
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