5 US Tax Mistakes Americans Should Avoid After Moving to Portugal

US citizens living in Portugal remain subject to US tax reporting on worldwide income regardless of their residency status. Key requirements include filing annual US tax returns, reporting foreign bank accounts (FBAR) if combined balances exceed $10,000 at any point in the year, and navigating complex US tax treatments for certain Portuguese investment vehicles like local mutual funds or ETFs, which may be classified as Passive Foreign Investment Companies (PFICs).

