How can I change my Non-O visa status from retirement to marriage based on my Thai spouse?

I certainly would go back and tell them you wanted the Non-O based on MARRIAGE to a thai NOT retirement.

The reason I say that is IF you continue and get the year extension based on retirement as well you''ll have to keep the 800K baht in the bank 3 months after your year extension is issued, then the balance can't go below 400K baht the rest of the year.

Where as IF you get a year extension based on marriage to a thai you only need the 400K baht in the account for 2 months before you apply and then you're free to use the funds.

They gave you a Non-O based on retirement because it's easier for them (and you document wise) BUT if you don't wanna follow that brutal seasoning requirement for the retirement extension GO and get that changed to marriage (they'll just cross out the word retirement and write in thai wife).

Because as a general rule, The initial in-country Non-O based on either retirement or marriage to a Thai doesn't require your funds to be kept certain period. If they require seasoning for an initial visa, it's the Khon Kaen rule as you mentioned.

If you really are given Non-O retirement, you need to apply for 1 year extension based on retirement for the first time (when your 90-days are up). With that, you have to keep your 800K thb in your Thai bank account 2 months prior to application day and three months after the extension is granted. Also, you need to keep at least 400K thb until your next year's extension (for whatever reason) will be approved.

Thank you for your report.

YES... that's WHY we always say...Go to your local Thai immigration office and ask for the requirements for the Visa you are applying for...

Glad you were successful.