FlagSageKey facts
| Tax basis | Residence, remittance basis for some |
|---|---|
| Tax year | Calendar year (1 January to 31 December) |
| Taxes citizens abroad | Not as a general rule |
| Residence tests recorded | 2 |
| Region | Asia |
How Thailand decides tax residence
Each test is recorded separately with its own ID. Meeting or missing one test does not settle residence on its own.
180-day residence test
A person who is in Thailand for one or more periods totalling 180 days in a tax (calendar) year is treated as resident, whether the stay is continuous or broken and regardless of nationality. The Revenue Department Q&A words this as 180 days or more, while its English summary says more than 180 days, so check the current official text. A non-resident is taxed only on Thai-source income.
Foreign income brought into Thailand (Por. 161/2566)
A resident who has foreign-source income from work, business or property must include it in the tax year it is brought into Thailand, whichever year that is. The Revenue Department Q&A says this applies to foreign income arising from 1 January 2024 in a tax year in which the person was in Thailand 180 days or more, brought in that year or later. Income arising before 1 January 2024 is excluded under the amendment in Order Por. 162/2566.
Reporting duties to check
- Annual personal income tax return. A person liable to personal income tax computes the liability, files a return and pays any tax on a calendar-year basis. Source
Living base
People usually live in Thailand under a visa and permission to stay granted by the Immigration Bureau, with work permits handled separately. A visa does not decide tax residence; the Revenue Department counts days present in the calendar year.
How visas, permits and tax residence differ
Citizenship
Thai nationality is governed by the Nationality Act. Routes, residence periods and the position on dual nationality are not stated here; check the Ministry of Interior and current official guidance.
Questions to take to a professional
- How many days was I in Thailand in each calendar year, and how are arrival and departure days counted?
- Which of my foreign income arose before 1 January 2024, and what records show when it was earned?
- If I bring foreign income into Thailand in a later year, which year's day count matters?
- Does transferring savings or capital, rather than income, into Thailand create assessable income in my case?
- How would a foreign tax credit or a tax treaty apply to foreign income I bring in?
- Do I need a Thai tax identification number and an annual return?
Official authorities
Sources
- Personal Income Tax (Revenue Department English site)Official guidance
- Revenue Department Order No. Por. 161/2566 (Thai)Official guidance
- Q&A on personal income tax under section 41 paragraph 2 of the Revenue Code (Thai)Official guidance
Other countries in Asia
- Countries covered
- Thailand
- Sources
- 3 sources listed above
- Tax year
- Current rules as checked
- Review
- Not professionally reviewed
Sources checked November 8, 2026