US taxes for Americans in Thailand

Front-loaded answerThailand only taxes foreign income you bring into the country, and only once you're a tax resident (180+ days). The 2024 change made any remitted foreign income assessable regardless of when it was earned. You still file a US return every year; the US–Thailand treaty keeps your Social Security US-only, and the Foreign Tax Credit handles any Thai tax.

The remittance basis & the 2024 change

Thailand doesn't tax worldwide income like Colombia does — it taxes foreign income you remit into the country. Before 2024, you could remit prior-year income tax-free; since January 1, 2024, all foreign income a 180-day resident remits is assessable, no matter when earned (pre-2024 income is grandfathered). A proposed two-year grace period stalled in 2025 and isn't law as of 2026.

• !Under 180 days: not a Thai tax resident — Thailand taxes only Thai-source income
• !Over 180 days: foreign income you remit into Thailand is taxable (rates 0%–35%)
• !Money you keep in US accounts and don't remit generally stays outside Thai tax

The treaty, FEIE & FBAR/FATCA

A US–Thailand income tax treaty exists; notably, under Article 20(2) US Social Security is taxable only by the US. On the US side, the FEIE excludes earned income up to $130,000 (2025) / $132,900 (2026), and the Foreign Tax Credit credits any Thai tax you pay. Thai bank accounts trigger the usual FBAR and FATCA reports.

Frequently asked

Is my US Social Security taxed in Thailand?

No. Under Article 20(2) of the US–Thailand tax treaty, Social Security benefits are taxable only by the United States. Other remitted foreign income can be assessable in Thailand once you're a 180-day tax resident.