Are payments by a Thai juristic person to a foreign juristic person subject to any Thai income tax?
Yes. Payments of certain types of income, usually in the form of service fees, royalties, interest, dividends, rent or professional fees from or in Thailand to a foreign juristic person not carrying on business in Thailand are subject to income tax in the form of a withholding tax at a rate of 15 percent, except for dividends, for which the rate applied is 10 percent.