Expat Tax Basics
11 min read • Updated December 2024
Overview of international tax obligations for expatriates. Tax systems vary dramatically by country and citizenship. This is educational information—consult a tax professional for your specific situation.
⚠️ Legal Disclaimer: This is general educational information about expat tax concepts, not personalized tax advice. Tax laws are complex and change frequently. Everyone's situation is unique based on citizenship, residency, income source, and destination country. Consult qualified tax professionals in both your home and destination countries before making any relocation or tax planning decisions.
Key Tax Concepts
Tax Residency
The country that considers you a tax resident (where you owe taxes on worldwide income) depends on multiple factors:
- • Physical presence test: Usually 183 days in a calendar/fiscal year = tax resident
- • Domicile: Your permanent home country (even if you leave, you may remain domiciled)
- • Permanent residence: Legal status granted by immigration
- • Center of economic interest: Where your business/employment is based
- • Nationality: Many countries tax citizens regardless of residency (like the US)
Tax Residency vs. Visa Status
Having a long-term visa doesn't automatically make you a tax resident. Conversely, you can be a tax resident without official residency status. Example: You spend 200 days in a country on tourist visas—you may owe taxes even without a residence permit.
Taxable Income
Countries typically tax:
- • Salary and employment income
- • Self-employment and freelance income
- • Investment income (dividends, interest, capital gains)
- • Rental income
- • Passive income (pensions, annuities)
- • Some countries tax "worldwide income" (all income regardless of source), others tax only local-source income
Tax Treaties
Most countries have bilateral tax treaties to prevent double taxation. These determine which country taxes specific income and provide tax credits. If your home and destination countries have a treaty, you typically won't pay tax twice on same income. Treaties are complex—professional guidance is essential.
US Expat Tax Obligations
US citizens and green card holders have unique obligations: they must file US taxes on worldwide income regardless of where they live or work. This applies even if you haven't lived in the US for decades.
Annual Filing Requirements
If you have US source income or meet income thresholds:
- âś“ File Form 1040 (US individual tax return) annually
- âś“ Thresholds: Generally $12,550+ income (2023) or $400 self-employment income
- âś“ Deadline: April 15 (can request automatic extension to October)
- âś“ Many expats qualify for extension automatically if filing from abroad
Foreign Earned Income Exclusion (FEIE)
MOST IMPORTANT: US expats can exclude the first ~$120,000 (2023) of foreign earned income from US taxation. Earned income = salary, self-employment income, NOT investment income.
- • Requirement: Pass Physical Presence Test (330+ days outside US in 12-month period)
- • Cannot exclude: Investment income, rental income, interest, dividends
- • Self-employment tax: Still owe 15.3% self-employment tax on net earnings (cannot exclude this)
- • Married filing jointly: Both can claim FEIE ($240,000 total)
- • Strategy: Primary benefit for digital nomads and remote workers abroad
Physical Presence Test (PPT)
To qualify for FEIE, you must be outside the US at least 330 days in a 12-month period.
- • Any day you're physically in the US counts as "in the US" (even partial days)
- • 12-month period can be calendar year or any 12-month rolling period
- • Days in US territories (Puerto Rico, Virgin Islands, Guam) may NOT count as US days (but verify)
- • Keep detailed travel records (passport stamps, receipts, dated photos)
FATCA and FBAR
US requires reporting of foreign financial accounts:
- • FBAR (FinCEN Form 114): Report all foreign bank accounts totaling over $10,000 (due June 30, extendable to December)
- • FATCA (Form 8938): Report foreign assets over certain thresholds ($200,000+ in most cases)
- • Penalties for non-compliance: Severe ($10,000+ per violation, criminal prosecution possible)
- • Simple check: Any bank/investment account abroad? File FBAR and FATCA
Pro Tip for US Expats: File tax returns annually even if you owe no tax. FEIE calculation requires filing. Keep FBAR/FATCA compliant to avoid penalties. Consider hiring a CPA specializing in expat taxes ($800-2000/year; worth the cost).
UK Expat Tax Obligations
Statutory Residence Test (SRT)
The UK uses the Statutory Residence Test to determine tax residency. Primarily depends on days spent in UK:
- • Automatically UK tax resident: 90+ days in UK in current tax year AND 3 of previous 4 years, OR 120+ days in current year
- • Automatically not UK resident: Fewer than 16 days (if UK resident in past 3 years) or 91 days (if not resident in past 3 years)
- • In between: Apply detailed rules based on work, accommodation, family
Non-Resident Status
Once you become non-resident, you only pay UK tax on UK-source income:
- âś“ Remote work for non-UK employer/clients: Usually NOT taxed in UK
- âś“ UK rental income: Still taxed
- âś“ UK pension: Still taxed
- âś“ Strategy: Move abroad, work remotely for international clients, minimize UK-source income
Non-Resident Tax Return
If you have UK-source income as a non-resident, you must file a UK Self-Assessment tax return. Failure to notify HMRC of non-resident status can result in penalties.
Zero-Tax and Low-Tax Destinations
Zero Income Tax Countries
These countries have no personal income tax for residents:
- • UAE (Dubai, Abu Dhabi): Zero income tax on salary + freelance income (since 2020). Must be tax resident in UAE.
- • Monaco: Zero income tax for residents (extremely high cost of living, expensive residency requirements)
- • Liechtenstein: Very low income tax, expensive residency
- • Cayman Islands: Zero income tax (but limited visa options for residents)
- • Note: Many "zero tax" countries tax corporate income or have other taxes (VAT, property, etc.)
Low-Tax Programs for New Residents
Some countries offer special programs for new residents:
- • Portugal NHR (Non-Habitual Resident): 10 years of 50% tax reduction on foreign-source income
- • Greece New Resident Incentive: 50% tax reduction for 7 years for new residents from abroad
- • Malta Status: Special tax regime for certain professionals and remote workers
- • Requirements vary: Some require establishing residence, home purchase, minimum income
Important: Tax benefits are usually ONLY for those who establish actual residence in the country. You can't just visit and claim zero tax. Also, your home country may still tax you—always consult professionals in BOTH countries.
Common Tax Mistakes Expats Make
- âś—Not filing home country taxes
Even if you don't owe tax, many countries require filing. Failure to file can result in penalties and legal issues.
- âś—Ignoring tax treaties
Tax treaties can reduce or eliminate taxes. Not using them means paying more than necessary. Professional guidance is essential.
- âś—Poor record keeping
Without documentation (receipts, travel records, income statements), you can't substantiate deductions or tax status. Keep detailed records.
- âś—Assuming zero-tax status automatically
Just moving to UAE or Portugal doesn't mean zero tax. You must establish actual tax residency and often meet specific requirements (days spent, residency permits, etc.).
- âś—Using untrained tax preparers
Expat taxes are complex. Using H&R Block or local preparers unfamiliar with expat rules can result in missing deductions or compliance failures. Hire specialized expat tax professionals.
- âś—Not considering FBAR/FATCA (US expats)
US expats with foreign accounts must file FBAR/FATCA. Penalties are massive for non-compliance. Don't overlook these filings.
When to Hire a Tax Professional
Definitely Hire a Professional:
- âś“ Any US citizen/green card holder relocating abroad
- âś“ Self-employed or freelancer income
- âś“ Multiple countries involved (you earned income in country A, lived in country B)
- âś“ Investment or rental income abroad
- âś“ Starting a business abroad
- âś“ Tax residency status is unclear
Consider a Professional:
- • Salary only (but complex multi-country situation)
- • First year abroad (to establish proper tax planning)
- • You're unsure about tax residency status
- • You want to optimize tax strategy
Cost Considerations:
- • Specialized expat tax CPA: $800-3000/year
- • Initial consultation: $300-500
- • Value: Avoiding thousands in penalties, maximizing deductions, strategic tax planning
Action Steps Before Relocating
- 1.
Understand your citizenship obligations
Research your country's expat tax rules. US has unique FEIE/FBAR requirements. UK has Statutory Residence Test. Canada/Australia have different rules. Know what applies to you.
- 2.
Research destination country tax system
What are tax rates? Is there a tax residency requirement? What tax treaties exist with your home country? Can you qualify for special programs?
- 3.
Consult with tax professionals
Hire specialists in BOTH your home country and destination. Have them review your relocation plan and provide guidance. Small investment now prevents expensive problems later.
- 4.
Plan tax residency timing
Determine when you'll establish tax residency in new country. Consider notifying your home country of your status change (if applicable). File final return in your home country if needed.
- 5.
Establish record-keeping system
From day one, keep detailed records: travel dates, receipts, income documents, everything. Maintain separate records for different tax jurisdictions.
Final Note: Tax laws change frequently and vary based on individual circumstances. This guide provides general information to help you understand expat tax concepts. Always consult qualified tax professionals who specialize in expat taxes for your specific situation before making any decisions.
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