Personal income tax in Thailand is calculated using a progressive rate system and depends on the total annual income — the higher the income, the higher the applicable tax rate.
On Tuesday, April 19, the government approved a number of amendments to the Revenue Code. Starting from 2017, individuals earning less than 26,000 THB per month will be exempt from personal income tax.
In addition, both the annual tax deduction and personal allowance will be increased. Currently, the standard deduction is 40% of income, capped at 60,000 THB. From 2017, it will be increased to 50% of income, with a new cap of 100,000 THB.
The standard personal allowance will also be doubled to 60,000 THB.
Furthermore, annual income up to 5 million THB will be subject to a 30% tax rate.
All of the above changes will come into effect in 2017.
Source: The Bangkok Post