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Dual Citizenship Thailand × United States
Status: Allowed
Quick Answer
Allowed — the US does not require renunciation of prior nationality, and Thai law permits retention post-naturalization.
Traps to watch
- ⚠️ FATCA/FBAR annual reporting of Thai bank accounts if aggregate > USD 10,000
- ⚠️ Worldwide taxation even if residing 100% in Thailand — file Form 1040 with FEIE ($126,500 for 2025)
- ⚠️ Two passports: US law mandates entry/exit of US on the US passport only
- ⚠️ Children born in Thailand acquire US citizenship jus sanguinis; file CRBA at US Embassy before age 18
Taxation
Federal 10–37% worldwide + FBAR + FATCA · US–TH tax treaty prevents double taxation
Military
Selective Service registration required for males 18–25 (no active draft)
Renunciation
USD 2,350 fee + Exit Tax if net worth > USD 2M — rarely advisable
Typical clients
Thai-American families, investors seeking SSA/Medicare access, dual-heritage children pursuing US university
Other countries
Consult: 083-249-4999 · LINE @NYC168 · contact@ilc.ltd
Consultation THB 8,500 · Full-service THB 55,000–185,000