It’s said that tax is the price we pay for living in a civilised society. Even though this statement may be true, it doesn’t make it any easier for us to calculate our taxes. This tool does! Download a free tax calculator for Thailand and calculate your personal income tax with ease. It works both in Excel (Windows, macOS) and Numbers (macOS).
Who is this tax calculator for?
As a simple spreadsheet, this Thailand income tax calculator can be used by foreigners and Thais alike. While it’s primarily designed for people who have a regular monthly income from employment, it may be further customised to suit other types of users, such as people with multiple types of income etc.
What it can do for you
As a numbers lover, I have developed this tax calculator for myself to keep track of my money and calculate my personal income tax. It’s been working really well and even managed to save me some money on a couple of occasions, for example, when it uncovered a payroll/accounting mistakes in my previous employment or helped me pay less withholding tax. It can now do the same (and more) for you. Here are a few reasons you may like it:
Easy to Use
Just input your numbers and the tax will be calculated for you.
Built for use in Thailand and up to date with the latest tax laws.
Can be fully customised to match anyone’s needs.
How to use the tax calculator
Calculating your own tax is really easy. In the spreadsheet, all fields that require your input have a grey background. On the contrary, all white fields do the calculations automatically and are best left alone (unless you want to change the formulas). The fields you will have to fill are:
Input your monthly income before any deductions are taken.
Tax applied to employment income and can represent 5-35% of your monthly salary. The deducted amount goes directly to the government and counts toward your yearly tax liability.
An amount paid to the Social Security Fund. It usually comprises 5% of monthly income but no more than 750 THB.
With monthly expenses filled in, you can get a clear picture of where where your money goes (see the graph below the Income Statement).
Deductions and Personal Allowance are a bit trickier to determine and largely depend on everyone’s situation. For the completeness of information, I am including their details below:
|Type of Income||Deduction|
|Income from employment||50% (not more than 100,000 THB)|
|Income from copyrights||50% (not more than 100,000 THB)|
|Income from property||10% - 30%|
|Income from liberal professions||30% (medical profession 60%)|
|Income derived from contract of work whereby the contractor provides essential materials besides tools||Actual expense or 70%|
|Income derived from business, commerce, agriculture, industry, transport, or any other activities not specified earlier||Actual expense or 65-85% (depends the type of income)|
|Single taxpayer||60,000 THB for the taxpayer|
|Undivided estate||30,000 THB for the spouse|
|Non-juristic partnership or body of persons||30,000 THB for each (max 60,000THB)|
|Spouse allowance||60,000 THB|
|Child allowance||30,000 THB each|
|Parents allowance (parents over 60 years of age with income less than 30,000 THB)||30,000 THB each|
|Life insurance||Max. 100,000 THB each|
|Health insurance||Max. 15,000 THB|
|Approved provident fund contributions and/or Retirement mutual fund contributions||Max. 500,000 THB (not more than 15% of income)|
|Long term equity fund||Max. 500,000 THB (not more than 15% of income)|
The last step – calculating your tax – is completed automatically. At the end, you will see the total tax due and the amount your employer already withheld from you. These two numbers will add up and if the total is positive, you need to pay the remaining balance. In case of a negative result, you have overpaid and can get your money back from the Revenue Department when filling your taxes.
Where to file a tax return in Thailand
Once you have calculated your tax with the tax calculator, you can file your tax return online on this website. Note that this website is only in Thai and is, therefore, pain to use for foreigners. In any way, taxpayers in Thailand are required to file their personal income tax returns and make payments to the Revenue Department within the last day of March following the taxable year. Happy calculating and filing!
Deadline for filing your tax return in 2019
The deadline for filing your taxes online for the previous year (2018) is April 9, 2019. Time remaining: