Can I register as a tax resident in Thailand while on a tourist visa?

That is correct. To get a tax ID last I heard they advise to open a local bank account which will give you one automatically. Thailand elite visa includes a bank account.

Once you do and you spend 180 days per year in Thailand, you qualify as tax resident, which means you don't pay any taxes on income from a foreign source. From what I've read this isn't a foreign vs local sourced distinction as in most other countries (as in in which country were you when you worked for that money), but rather if the money enters Thailand or not, which is a huge advantage (most other countries with territorial tax systems do tax locally sourced income, even if it doesn't enter the country).

The bigger issue is your country of origin and the country were you earned that income, because both will be interested to tax you. Many countries have some unclear rules you need to comply with before they consider you as having moved to another country (which can be having a long term residency permit, spending minimum 2 to 5 years in said country, not having any attachments in your country of origin...).

It’s easy to NOT spend more than 90 days per year, and not have a home, in your country of original fiscal residence but it’s better to show your proper legal residence in Thailand as explained above,..🙏🙏 once you have done this your WORLDWIDE income is non taxable in Thailand

Behave yourself,any spare dosh throw it this way mate.

WTF!?!?

What a Hero pay Tax Really

If you are over 50 get a retirement visa and become fiscally resident in Thailand - then you pay NO tax on your worldwide income

If you have funds in a Thai Bank you will pay 15% on any interest earned. When you pay immigration for anything you have done you are paying Tax.

If you smoke and drink or have a car you paid tax already

Tax issues are a complicated thing. please read the billateral Tax agreement between your home country and Thailand

Are you right in the head 5555

I would like to do the same rather than paying UK tax at 40% on related earnings.

It's impossible other than being granted non domicile, in the UK. All sounds good? It isn't as you first need to be granted 'domicile' in your chosen country, and give up your passport etc and Thailand don't do that on demand.

Try somewhere in West Africa. It won't be happening here.

Doesn't work like that I'm afraid. Tax is paid where your income is earned. In order for it to be taxable in Thailand you would need to remit your income to Thailand BUT doing this doesn't necessarily mean Thailand will have primary taxing rights.

The above does not take into account you are on a tourist visa, which may null and void the above anyway.

Yes you can get a tax number and files taxes in Thailand on a tourist visa.

It is legally required if you have taxable income...

Yes you can have taxable income without working in Thailand and everything is still legal.

I think what you're actually asking is can you get a "tax I/D number" as a foreigner here on a tourist visa <-(the number that tracks you for tax purposes)

And unfortunately I don't know the answer to that, BUT I bet the Dept of Revenue does and the first day they're going to be open after this Songkran holiday is Friday the 16th.

That doesn't even make sense. You don't have any income in thailand BUT you would prefer to pay tax here?

What does that even mean?