Personal Income Tax (PIT) is a direct tax levied on income of a person. A person means an individual, an ordinary partnership, a non-juristic body of person and an undivided estate. In general, a person liable to Personal Income Tax has to compute his tax liability, file tax return and pay tax, if any, accordingly on a calendar year basis.
Taxpayers are classified into “resident” and “non-resident”.
“Resident” means any person residing in Thailand for a period or periods aggregating more than 180 days in any tax (calendar) year. A resident of Thailand is liable to pay tax on income from sources in Thailand as well as on the portion of income from foreign sources that is brought into Thailand.
A non-resident is, however, subject to tax only on income from sources in Thailand.
Talk to your tax consultant like MSNA to find out if your income is subject to personal income tax in Thailand.