Could you show the tax regulation that states that ?
I have only an old Law , but I think it is still valid (see below) .
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Explanation of the Income Tax Law no.36 Year 2008
Article 2 , item (2) :
... , an individual taxpayer who receives income below the personal exemption is not required to register to obtain a NPWP .
Regulation PMK No. 18/PMK.03/2021 and implementing regulation PER-23/PJ/2025 saying:
"Article 3
Domestic taxpayers are:
a. individuals, whether Indonesian citizens or foreign nationals, who:
1. reside in Indonesia;
2. are present in Indonesia for more than 183 (one hundred and eighty-three) days within a 12-month period; or
3. are present in Indonesia during a tax year
and intend to reside in Indonesia;
.......
Art. 4
An individual, whether an Indonesian citizen or a foreign national, residing in Indonesia as referred to in Article 3 letter a number 1 is an individual who:
a. resides in a place in Indonesia that:
1. is controlled or can be used at any time;
2. is owned, rented, or available for use;
and
3. is not a place of transit for the individual;
b. has a primary center of activity in Indonesia that the individual uses as the center of personal, social, economic, and/or financial activities in Indonesia; or
c. carries out daily habits or activities in Indonesia, including activities that are a passion or hobby.
(2) The period of 183 (one hundred and eighty-three) days as referred to in Article 3 letter a number 2 is determined by calculating the length of time the individual taxpayer is present in Indonesia within a period of 12 (twelve) months, either continuously or intermittently, with a portion of a day counted as 1 (one) full day.
An individual is deemed to have the intention to reside in Indonesia as referred to in Article 3 letter a number 3, which can be proven by documents in the form of:
a. Permanent Stay Permit Card (KITAP);
b. Limited Stay Visa (VITAS) with a validity period of more than 183 (one hundred and eighty-three) days;
c. Limited Stay Permit (ITAS) with a validity period of more than 183 (one hundred and eighty-three) days;
d. a contract or agreement to undertake work, business, or activities in Indonesia for more than 183 (one hundred and eighty-three) days;
or
e. other documents that can demonstrate the intention to reside in Indonesia, such as a rental contract for more than 183 (one hundred and eighty-three) days or documents indicating the relocation of family members...."
and so on.
Having minimum 12 month KITAS means intention to reside in Indonesia, ergo you are a subject of a taxation, on worldwide income.