Who has to file taxes in Thailand?

In Thailand, you need to file taxes if you live in the Kingdom for 180 days or more, or if the money was for work conducted in Thailand and your assessable income is over 120,000 THB as an individual or 220,000 THB as a joint filing married couple. The tax year is from January to December, and you usually have until the end of March the next year to file your taxes.