Your Thai tax ID number, also called your Tax Identification Number (TIN), is the personal taxpayer number issued to you by the Thai Revenue Department. It is used on all tax filings, bank reporting and official correspondence.
If you already have a TIN but cannot locate it, you must visit your district Revenue Office with your passport and proof of address. Officers can retrieve your tax ID number from their system and reissue it. There is no online or phone service to look up your TIN.


