How can I check if my old Thai tax ID from the 1980s is still valid?

Question

I had worked in Thailand back in 1980's and I do think I have a tax ID. How can I find out if the Tax ID is still valid?

Ask Thailand · Answer

If you had a tax ID in Thailand from the 1980s, it's likely no longer valid due to changes in the tax ID format. The Thai Tax Identification Number (TIN) format changed from a 10-digit to a 13-digit number in 2012. To see if your old tax ID is still valid, it's recommended to visit the tax office with your passport. Some individuals have successfully located their old tax IDs using this method, while others have noted that they may need to obtain a new tax ID.

Martin ******* · Answer

Really interesting question. I stopped working in 2013, and also wondered if I still had a tax number (which my pension company keeps asking for).

Colin ********** · Answer

I found my old tax ID by visiting the the tax office and using my passport number

Nicholas ********* · Answer

The Thai Tax Identification Number (TIN) transitioned from a 10-digit format to a standard 13-digit number in 2012.

Your old number is no longer of use.

Russ ******** · Answer

You'll need a new one. The number format of the tax id changed at some point in the last 10 years or so.

Tom ****** · Answer

I also had one in the early nineties when the 180 day rule was introduced.

Was living in E-sarn at the time and if you'd been in Thailand longer than 180 days in a calender  year you couldn't leave the country unless you got a tax clearance certificate.

So I went to the Tax office  near Sanam Luang in BKK paid 500 baht and recieved a tax file number and tax clearance certificate.

This was a draconian idea that didn't last long and was put on a shelf and is probably still a law today but not enforced as an awful lot of new rules,  laws are here that officials realised were never going to work.

How can I check if my old Thai tax ID from the 1980s is still valid?

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