Expat tax

What does 'expat tax' actually cover?

Expat tax is shorthand for the tax obligations that arise when an individual lives outside their citizenship country, holds tax residency in a country other than their citizenship country, or moves between tax-residency jurisdictions during a tax year. The dominant framework globally is residency-based taxation: residents are taxed on worldwide income, non-residents only on source-country income, with bilateral treaties allocating taxing rights and providing relief from double taxation [SC7]. The United States is the principal exception — US citizens are taxed on worldwide income regardless of where they live, with a parallel residency framework for non-citizens. A second category of distinctive frameworks: territorial regimes (Hong Kong, Singapore for non-trader investors, parts of the Malaysian framework through 2026) tax only source-country income for residents. The practical consequences for filers moving between jurisdictions, holding cross-border assets, or earning multi-jurisdiction income depend on the interaction of (i) source rules, (ii) residency rules, (iii) treaty residency tie-breakers, and (iv) domestic relief mechanisms (foreign tax credit, exemption-with-progression, foreign earned income exclusion).

How do residency tests compare across jurisdictions?

The baseline residency test in most jurisdictions is a day-count threshold — typically 183 days or more in the tax year. The United States, India, Korea (with a one-year-stay variant), Brazil, and most peer jurisdictions adopt this floor. Several jurisdictions add a multi-year look-back: India counts 60 days in the PY plus 365 days across four preceding PYs (with citizen-leaving-for-employment carve-outs); the United Kingdom's Statutory Residence Test includes a Sufficient Ties Test that counts UK ties (family, accommodation, work, 90-day, country tie) against day-count thresholds; Norway counts 270 days in any 36-month period as well as 183 in any 12 months; New Zealand requires 183 days in any 12-month period together with a permanent place of abode test.

Facts-and-circumstances frameworks dominate in jurisdictions that pre-date the day-count harmonisation: the Netherlands operates an open-norm 'durable personal connection' test under Article 4 AWR; Israel applies a 'centre of life' test with rebuttable day-count presumptions; Sweden's essential ties test extends residency for at least five years after departure of Swedish citizens unless decisive ties are severed; Mexico's centre-of-vital-interests test is met if more than 50 percent of total income is Mexican-source. Domicile-based frameworks operate in the UK (alongside the SRT), Ireland (with the non-domiciled remittance basis through specific reforms), and a small set of common-law jurisdictions [SC2][SC5].

What is the United States' position on citizen-based taxation?

The United States is the only major economy that taxes its citizens on worldwide income regardless of where they live; the only other jurisdiction with broadly similar reach is Eritrea. US citizens abroad continue to file US returns, report foreign assets through FBAR (FinCEN Form 114) and Form 8938 (specified foreign financial assets), and pay US tax on worldwide income [SC1]. Three principal relief mechanisms reduce the practical double-tax burden: the Foreign Earned Income Exclusion (FEIE) under IRC §911 excludes up to USD 130,000 (2025 figure, indexed annually) of foreign-earned income for filers meeting either the Bona Fide Residence Test or the Physical Presence Test (330 days in any 12-month period outside the US); the Foreign Tax Credit (FTC) under IRC §901 credits foreign income tax paid against US tax on the same income; and the Streamlined Filing Procedures provide an amnesty path for non-wilful expat-tax delinquency. Treaties typically include a saving clause that preserves the United States' right to tax citizens as if the treaty were not in force, with limited exceptions — which is the legal reason a US citizen abroad cannot generally use treaty residency to escape US tax [SC1].

How do worldwide-versus-territorial frameworks interact with treaty residency?

Residency-based worldwide-tax jurisdictions (most of the OECD, Latin America, and major Asian economies including Japan, Korea, India, China) tax residents on worldwide income with treaty relief from double taxation. Treaty residency tie-breakers under the OECD Model Article 4 typically run through permanent home, centre of vital interests, habitual abode, and citizenship in sequence — only one jurisdiction holds treaty-residency in a given year. Foreign tax credit or exemption-with-progression mechanisms in domestic law provide relief where source-jurisdiction tax has been paid. Jurisdictions with territorial frameworks (Hong Kong as the cleanest example, plus Singapore for non-traders, the UAE prior to the introduction of CT) tax residents only on source-jurisdiction income — treaty relief plays a different role, primarily relieving foreign withholding on outbound investment income from the residence jurisdiction. Several jurisdictions operate hybrid frameworks: Japan's Non-Permanent Resident category (foreigners not resident more than 5 of last 10 years) is taxed on Japanese-source plus remitted foreign-source income; Ireland's non-domiciled remittance basis operates similarly for non-domiciled residents; Malaysia's foreign-source-income exemption for individuals through 2026 has territorial-like consequences during the exemption period.

What inbound-resident regimes are available?

Several jurisdictions operate structurally favourable regimes for new-arrival residents — common drivers are talent attraction, return-migration support, and tax-base competitiveness for cross-border filers. The principal regimes:

• Italy: Article 24-bis TUIR HNWI regime (EUR 200,000 annual flat on foreign-source income for up to 15 years for new residents not resident in 9 of prior 10 years); Regime degli impatriati (50 percent income reduction for new-arrival workers and self-employed)
• Spain: Beckham Law (Article 93 IRPF Law, expanded 2023) — flat 24/47 percent IRPF on Spanish-source income for qualifying inbound workers/entrepreneurs/remote-workers for up to 6 years
• Israel: Olim Chadashim (10-year exemption from Israeli tax on most foreign-source income for new immigrants); Toshavim Chozrim Vatikim (parallel for long-term returning residents)
• Netherlands: 30 percent ruling under Article 31a Wet LB 1964 (graduated taper post-2024 reform — 30/20/10 percent across three tranches of qualifying employment income for inbound highly-skilled migrants)
• Belgium: RSII / BBVN special tax regime under Articles 32/2-3 CIR/92 (since 2022) — 30 percent tax-free allowance up to EUR 90,000 for qualifying inbound workers/researchers for up to 5–8 years
• Switzerland: Pauschalbesteuerung (lump-sum regime) at federal and most cantonal levels for non-Swiss-citizen new arrivals not pursuing gainful activity (abolished by Zurich, Schaffhausen, Appenzell Ausserrhoden, Basel-Stadt, Basel-Landschaft)
• Denmark: Forskerskatteordningen (sections 48E–F KSL) — 27 percent flat plus 8 percent AM-bidrag on qualifying inbound workers/researchers for up to 84 months
• Austria: Zuzugsbegünstigung under section 103 EStG for inbound researchers, scientists, artists, athletes
• United Arab Emirates: No individual income tax on employment, investment, or capital-gain income for any natural person — structurally the most favourable jurisdiction for high-income individuals among major economies
• Singapore: Three-Year Administrative Concession plus the broad section 13(7A) foreign-source-income exemption for resident individuals
• New Zealand: Transitional Resident Status under section HR 8 — four-year exemption from NZ tax on most foreign-source income for new residents not NZ-resident in prior 10 years

What exit-tax frameworks should departing residents consider?

Many jurisdictions impose exit-tax exposure on emigrating residents holding unrealised gains on substantial-shareholding positions or other specified assets. Canada under section 128.1 ITA imposes a deemed disposition of most assets at fair market value at the date of emigration, with exemptions for Canadian real property and registered plans. France under Article 167 bis CGI imposes exit tax on substantial-corporate-participation holders (above EUR 800,000 unrealised gains, or 50 percent holdings) with deferred-payment options. Germany under section 6 AStG imposes exit tax on substantial-shareholding emigration; Israel under section 100A ITO operates similarly; Norway under section 9-14 Skatteloven; Spain under specific provisions of Ley 35/2006. Austria's section 6 Z 6 EStG and the Netherlands' specific provisions follow the same pattern. The US exit tax under IRC §877A applies to long-term lawful permanent residents who give up green-card status and to citizens who renounce citizenship, deeming a sale of all assets at fair market value the day before expatriation, with thresholds and exemptions. Practitioners commonly review exit-tax exposure as part of any pre-emigration position-taking conversation.

How do common cross-border scenarios play out?

US-citizen working abroad: The filer continues to file US returns, claims FEIE or FTC for foreign-tax-paid, files FBAR if foreign-account aggregate exceeds USD 10,000 at any point during the year, and reports foreign financial assets on Form 8938 above thresholds. Treaty residency tie-breakers do not exempt the citizen from US tax due to the saving clause but can affect the source-jurisdiction's taxing rights.

EU-resident working remotely for a US employer: Most EU jurisdictions tax residents on worldwide income; the US-source employment income is reported in the EU return. The US-EU treaty typically allocates primary taxing rights to the residence country with US source-country relief (or vice versa for short-term assignments). FTC mechanisms in both directions reduce double taxation.

UK-domiciled returning after years abroad: SRT day-count plus the post-2025 Foreign Income and Gains regime (replacing the historic non-dom remittance basis) determine UK exposure. The four-year FIG exemption for new arrivals is structurally generous; pre-arrival positioning matters.

Australian moving to UAE: AU residency cessation is the key event; the four ITAA 1936 residency tests must each be analysed for cessation. UAE has no individual income tax; the principal residual AU exposure is on AU-source income (rental, capital gains on AU real property) with no continuing worldwide-tax claim once residency cessation is established.

Indian citizen with substantial Indian-source income who emigrates: Section 6(1A) ITA's deemed-residence rule for Indian citizens with Indian-source income above INR 15 lakh and no other tax-residence catches filers who relocate to no-tax jurisdictions without establishing tax residence elsewhere. Practitioners commonly review this trigger before relocation [SC5].