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How can I apply for a Thai Tax Identification Number (TIN) before completing 180 days in Thailand?

Thai Tax Identification Number (TIN)Tax Residency in Thailand Income Tax for Expats Tax Filing in Thailand Required Documents for TIN Application

Jul 7, 2025

7 days ago

Mathur *********

ORIGINAL POSTER

I would like to request assistance in applying for a Thai Tax Identification Number (TIN) at the earliest, even though I have not yet completed 180 days in Thailand.

As I will be earning taxable income during this period, obtaining a TIN early may help reduce the applicable tax rate and simplify tax filing later.

Please let me know if this is possible and what documents you require from my side.

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TLDR : Answer Summary

The user is seeking advice on obtaining a Thai Tax Identification Number (TIN) prior to reaching 180 days of residence in Thailand, emphasizing the need for the TIN to facilitate tax filing and potentially reduce tax rates due to upcoming taxable income. Comments provide insights that typically one needs to be in Thailand for 180 days to be considered a tax resident to obtain a TIN, but it may vary by office and could depend on specific documentation like proof of address, passport, and proof of taxable income.

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Mehdi *******

According to The Revenue Office 3, you will need a proof of address (Usually the TM30 can do it), a copy of your passport to prove your tax residency and a proof of taxable income.

7 days ago

Biff *******

As with most things in Thailand it will differ from office to office.

Best way to find out is to go and ask them.

7 days ago

John **********

You need to be inside Thailand for 180 days in a calendar year to become tax resident for that year. If your not a tax resident they're not going to give you a TIN

7 days ago

Mathur *********

ORIGINAL POSTER

@John *********

According to Thai Revenue Department rules, any foreigner earning assessable income in Thailand is required to apply for a TIN, even if they haven’t completed 180 days in the country.

Since I’ve already started working and earning taxable income, I believe I’m eligible to apply for the TIN now.

Am actually confused here.

7 days ago

Reply to

Mathur *********

How can expats obtain a Thai Tax Identification Number (TIN) and what is the process involved?

13 comments

12 days ago

What Thai taxes apply to a foreigner staying over 180 days on a DTV visa?

59 comments

a month ago

How can I obtain a Tax Identification Number (TIN) in Thailand, and are there agencies that assist with this process?

4 comments

a month ago