Your situation, country by country: the treaty, the totalization agreement, retirement accounts, and the local investment traps — in one place per country.
4 country guidesDutch AOW and US Social Security are each taxed only by the paying country — but most of Box 1 is non-creditable social premiums.
Read the guideFrance taxes wages more than the US, so the credit usually wins — CSG/CRDS are creditable since 2019. French funds and assurance-vie are a PFIC trap.
Read the guideThe UK treaty protects your pension growth and Social Security from the saving clause — but not your ISA, and not the 25% pension lump sum.
Read the guideMoving to Italy doesn’t end US tax filing. The treaty’s saving clause, FEIE vs FTC, totalization, and the PFIC trap in Italian funds.
Read the guide