Graham Seal Not if you pick the correct bank in correct location. In this case Pattaya/Jomtien. I know exactly how it works in my Bangkok Bank branch in Jomtien. And a 90 days Non-immigrant O Visa isn't a Long Stay visa.
Then you dont know anything about Bangkok Bank. That's the most foreigner friendly bank in Thailand, especially the Jomtien Second Rd branch. Never compare a bank like Krungthai with BB. I've had bank accounts in 3 provinces. My first one was in Kanchanaburi in 1990, second in Khon Kaen a few years later and the last three, one in Kasikorn Bank in Jomtien and 2 accounts at Bangkok Bank in Jomtien.
Jan Kenneth Nesland I mentioned the tourist visa to have more time for the bank account. It's totally possible to open a bank account on a tourist visa, especially in Pattaya or Jomtien. No need for an agent.
If you mean arriving on a 30 days visa exempt, then the answer is yes. But,it's smarter to apply for a 60 days tourist visa back home. The reason is the Thai bank account you need for the process.
The Revenue Department isn't after for example retirees. Period.If you don't have a so called TIN, they don't know about you. Don't listen to scaremongers. If you're actually working or the proposed Nomad Visa gets approved, that's another story.
Apply at home for the 90 days Non-immigrant O Visa based on retirement. No need for a thai bank account,yet. When you arrive in Thailand, you have 30 days to open a bank account and transfer ฿800k from back home. That transfer has to show up as international in your account/bank book. These ฿800k must be in your account at least 60 days prior to the day you apply for the 1 year extension. No need for a law firm or agent if you meet the requirements.Its just a waste of money.