Siam International Accounting Management Ltd.
ARTICLE 23 of the Double Taxation Agreement between Thailand and the US provides an exemption from Thai personal income tax for teachers who were resident in the US immediately before visiting Thailand to teach.
Article 23 (1) - Teachers
In determining residency there is worldwide consensus that, if a person is physically present in a country for 183 days or more in a particular tax year, they are a resident of that country. The US, however, uses a variation of the 183-day rule known as the "Substantial Presence Test" which applies a form of weighted average over a three-year period in order to determine the 183 days. It is therefore possible for a person to be considered a US resident under the Substantial Presence test and for the person to also be considered a resident of a foreign country for the same year. This is known as "Dual Residency" which is covered further down this page
THE SUBSTANTIAL PRESENCE TEST
1) The number of days they were present in the US during the current calendar year;
2) One-third the number of days they were present in the US during the previous calendar year;
3) One-sixth the number of days they were present in the US during the second previous calendar year THE BONA FIDE RESIDENCE TEST
THE PHYSICAL PRESENCE TEST
DUAL RESIDENCY
Form 8802 Instructions (Click images to enlarge) Teachers' instructions
a) he shall be deemed to be a resident of the State in which he
has a permanent home available to him; if he has a
permanent home available to him in both States, he shall be
deemed to be a resident of the State with which his personal
and economic relations are closer (center of vital interests);
b) if the State in which he has his center of vital interests cannot
be determined, or if he does not have a permanent home
available to him in either State, he shall be deemed to be a
resident of the State in which he has an habitual abode;
c) if he has an habitual abode in both States or in neither of
them, he shall be deemed to be a resident of the State of
which he is a national;
d) if he is a national of both States or of neither of them, the
competent authorities of the Contracting States shall settle
the question by mutual agreement."
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