Is a joint bank account sufficient for a Type O retirement visa application in Thailand, or must it be in the applicant's name only?

Why wouldn’t you go open a dedicated fixed deposit account that is only used to secure your visa and earns almost 2% interest.

Do you WANT TO commingle your funds and put your bank balance, and thus your visa renewal at risk?

SMH

No must be in your name

as ellie correctly stated

IF your immigration office allows joint account for the banked money method on retirement visa/extension (which you need to check and see because not all offices even allow it) then you would need DOUBLE the required funds in the account so 1,600,000 because in the eyes of the thaiz only half that money is yours 🙂

If the application is for one person then the account must be in that person's name only.

You can use a joint bank account if you want to, but you need to double the balance (in case the names on the account are for two people), which means you must deposit 1,600K baht into it.

When a bank account is a "joint" type, the average account balance of the number of registered people under that account will be considered as yours.

You'd better check your local immigration office if you can use a joint account in advance. Some offices don't like joint accounts much.