What documents do I need for a 1-year extension on a Non O visa in Thailand?

EASY, JUST TAKE HERE OUT FOR A DINNER , AND THEN U WILL SOULD IT !! HE HE HE

Will your funds have seasoned for 2 months by day 45 if not you need to wait?

Go to your local immigration and ask for their requirements

Whereabouts in Pathum are you ?

You don't need health cover or a medical, the rest of your requirements are immigration office specific so go and ask them

After your 800+K has seasoned for 2 months, then you can apply for the extension.

I have to go there end of January to do mine so can you post the list of requirements thanks

You only need health insurance if you entered Thailand with the 1-year non-OA visa that also required health insurance.

For a non-O extension, no health insurance is required. A medical certificate wouldn't be required for an extension with either of those.

You should go to your immigration office ahead of time and ask them for their handout of requirements, which will list everything that your specific office needs. Each office has their own requirements.

Also you should check your calendar, because January 3rd is a Saturday. You do not have to apply 45 days before your stay expires. You can apply when you have 30 days or less left at most immigration offices, and when you have 45 days or less left at some offices.

Think it’s the earliest 45 days not the last day

Pleased you got your bank account sorted .Why don’t you pop into pathum thani Io and ask ,they are usually very friendly and not that busy ,apart from the Laos workers