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Main Page - Expat and Thai Income Tax

Assessable Income

Dual Tax Agreements

Decision Time - Thai Income Tax

A Thai income tax payer is allowed certain deductions and allowances in the calculation of the taxable income. The Taxpayer shall make deductions from assessable income before the allowances are granted.

There are different amounts depending on the type of assessable income. The Personal Income Tax Return has different places to insert assessable income with corresponding space to insert deductions and allowances.

Taxable income for each category is calculated by subtracting deductions and then subtracting allowances to arrive at taxable income to which the tax rate is applied.

Deductions from assessable income can be made based on supportable expenses or from a permitted amount without the need for evidentiary support.

There are several types of deductions, with the following most likely to apply to Expats who remit assessable income into Thailand:

• Salary or pension income (50% not exceeding THB 100,000)
• Rental of property (30% for houses, buildings & 20% for agricultural land,  and 15% for other land)
• Professional service (60% for medical services and 30% for engineering, architecture, legal, accountancy and fine arts)
• Business (60% of assessable income)

The place to enter the deduction(s) on the Thai Income Tax Return is shown as "expenses" rather than "deductions." 

Note: This example is from the 2023 Income Tax Return as the Revenue Department has not yet uploaded an English version.

There are several types of allowances which are subtracted from Assessable in arriving at taxable income.  The Allowances listed below are the most likely ones that will be available to Expats transferring money into Thailand.

The next step will to be to calculate the amount of tax liability due for the year 2024.  You can use the steps below to estimate the amount of tax, if any, due for the year.

When this is done, you should have a reasonable estimate of your tax liability, if any, to make a decision about filing Thai Income Tax return.

To calculate the amount of your tax liability, if any, use the following steps:

1 Subtract any amount that is not assessable income

2 Subtract Deductions that apply to you

3 Subtract Allowances that apply to you

4 The result is your taxable income

5 Subtract the first 150,000 baht as it is not taxable

6 Apply the appropriate tax rates shown below to each increment and total the amount to arrive at the total tax amount due, if any.