Can I use money from an ISA account for a Non-O Visa application in Thailand?

In the past I've used an ISA savings account statement. It's only the non-OA visa that requires lots of information. The non-O is simple

You need funds (of either 400K or 800K equivalent) in your home bank SAVINGS account (or in ANY account ANYWHERE as long as you prove it is in your name) if you apply for a Non-Imm-O Family or Retirement Visa through the e-visa online system of the Thai embassy in your country. If your ISA account is instantly accessible, you can use it.

The funds can be in your home country’s currency. If they only mentioned “equivalent to XXX Thai Baht” then we would know that the funds can be in another currency. Thai embassies, sadly, are not known for crystal clear explanations in English language.

Actually, for the visa application, most Thai embassies worldwide now require you to upload THREE months of account statements showing the required funds (400K or 800K equivalent): There are free Apps out in the internet with which you can merge three or more pdf files into one single pdf, if this is your concern.

Only for the application to the 1-year Extension of Stay, the funds must be sitting in a Thai bank account in your sole name.

If you use the income proof method, keep in mind that even while you can upload original income documentation into the visa application, once you have entered Thailand and wish to apply for the 1-year extension of stay, you can only use the income method if your country’s embassy is still issuing income affidavits.

Just uploaded 1 month on mine (money in bank) but 3 months on my wife's (income method)

As an alternative to showing £18,000 in an instant access account, you can show income of over £1,500 per month for the 3 month period. Instant access cash isa’s are accepted, but stocks, and shares isa’s are not.

You need £18k in your current everyday bank account final balance when applying from the UK. You upload the FULL PDF file showing ALL transactions. Account in your name only.

The whole process is clearly explained in this video...

Thailand Immigration Bureau here.

What is an ISA account?

I suggest you get your non o over 50 visa before you get to thailand otherwise you wont be able to open a thai bank account. This is key to be able to get your 12 month extension of stay.

As long as the ISA account is an instant access cash isa, I.e. not locked in so you can access it then its ok to use