Thailand tax residency rules
Threshold: 180 days · Day Count · Calendar year (Jan 1 – Dec 31)
Thailand triggers residency at 183 cumulative days in a calendar year. Historically, residents were taxed only on foreign-source income remitted to Thailand the same year earned. Effective 2024, foreign-source income remitted in any year is taxed if you were a resident the year it was earned.
- 183 days in a calendar year = Thai tax resident.
- 2024 reform: foreign-source income remitted to Thailand is now taxed regardless of year remitted, if earned during a residency year.
Rules tracked by Tax Days
180-Day Rule
- Type
- Day Count
- Threshold
- 180 days
- Period
- Calendar year (Jan 1 – Dec 31)
Tax residency triggers if you're physically present for more than the threshold number of days in a calendar year.
Thailand tax residency, FAQ
How many days can I spend in Thailand before becoming a tax resident?
Generally, spending more than 180 days in Thailand during a calendar year can make you a tax resident.
How does Thailand count a day of presence?
Day-counting rules vary: many jurisdictions treat any part of a calendar day spent in-country as a full day, while others require presence at midnight. Because the burden of proof is usually on you, keep a contemporaneous, day-by-day record of where you were.
What tax year does Thailand use?
Thailand measures residency over calendar year (jan 1 – dec 31).
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