How long can I keep my funds in a US bank before needing to transfer to a Thai account on a Non-OA retirement visa?

Sheesh, this turned into a train wreck (and now you see WHY we close posts once the O/P's question is answered)

This is not about getting yearly extensions, this is not about going back to your country and buying a new Non-OA, this is not about getting yearly extensions from Non-O visas,

This was a simple question about WHEN would the person on a NEW OA visa have to start transferring money into their thai bank account so they could get a yearly extension INSIDE the country when their OA visa ran out ...

AND

The answer is, because you can get almost TWO years of stay out of an OA visa if you work it right, you would need to start the monthly transfers just a month or two before you bounced out and back to get that "second year" entry stamp. <- That would give you 12 months of incoming transfers when the second year stamp was running out so they can apply for a yearly extension using monthly income method..

just an alternative

You don't need to have funds in Thailand if you go back to your home country at the end of the so-called 'second year' to apply for a new Non-OA... You can repeat that two-year's routine which Tod described above, as many times as you want.

well, if the consulate in your home country doesn't have 1 time only for Non-OA policy, anyway.

If you get the year-long, multi-entry Non-Immigrant Type OA (Long Stay) Visa from the Thai consulate in your country before you come here (that's the visa that requires the police background check, the medical certificate and the mandatory 100K USD health insurance) you can get ALMOST 2 years of stay out of a visa valid for one year..

You come in, show the visa/proof of insurance and will be stamped in for as long as the insurance is valid for (up to a year).

Then, just before the VISA expires you get another year of insurance, bounce out and back and you will get a whole new year entry stamp. Giving you 2 years of stay on a visa that's valid for just one year..

It's at the beginning of the second year that you'd need to start transferring in the 65K baht a month each month every month into a thai bank account in your name only so that when that second year stamp was running out you'd have 12 months of incoming international transfers of the 65K baht a month minimum so you could get the year extension at the immigration office based on monthly income