What documents are required for the first NON-O retirement visa extension in Thailand?

All of them. None of them. Some of them. Will change on Tuesday or when there is a new moon. Except Wednesdays in months with the letter N

Do some work like we did

Country of passport and your location in Thailand?

A L L M A N D A T O R Y D O C U M E N E T S

How did I do?

Whenever you have to deal with a bank book, deposit 100bath or something the day you need it to ensure you get that date in your bank book.

Ask imigration

Go to immigration

Here in Pattaya, you can go and ask this question and they’ll give you a list of what’s required.

Pay someone to do it easy

I went one week before the expiration date. No worries. The IO sent us away because the photos were not according to the local-national requirements.

We went again the next day, with obviously a new bank balance letter from the bank and all went well.

Note that we went for “marriage extension” and they heavily try to discourage that. “When you would do retirement extension it would be done in 10 minutes” the lady repeatedly said.

She is really a very friendly and helpful lady. No passport photos? She will take her mobile and generate them. Too many forms? She will do them for us. Sign here!

But wedding extension…

Nonetheless, done within a week before non-o expiration. No worries.

You need the money in your account for 2 full calendar months before you apply for the extension. Other than a TM30 you also need a letter from your bank, bank statements for 3 months (next year it will be 12 months) and an updated bank book on the day you apply. Anything else is going to be office specific so best to ask them

This will help you, but I would also suggest that you ring the immigration office that you are going to use for any other information they may need

As others have said all immigration offices are different. If you are going to be applying at one of the bigger offices (Bangkok, Pattaya, Phuket Chaing Mai etc.) then you may be able to get better advice from this group.

Sounds like you have done the correct thing by getting the 800k into your bank account as early as possible. All the other requirements are normally easy to obtain.

Go to your immigration office and ask for the list. They're all annoyingly different

In my experience seasoned, transferred from abroad 800k and proper (as per local IO) TM30 most important.

If you’re on a non-o now you got until the last day to file but I wouldn’t advise it in case you need additional documents

If you go to the immigration office and tell them what you want to do they will give an info sheet and you can go through it step by step.

You're probably better off researching something like this at the Thai embassy website. You may not get accurate information from strangers on fb.

Go to your immigration office and get their list. Then you'll have correct stuff.

Every immigration office has its own nuances. You haven't mentioned the office, but my advice is to go there ahead of time and get the list from them.