What are the requirements for renewing a retirement visa (Non-Immigrant O) using a monthly pension deposit in Thailand?

And you can only do it if your embasy doesn't issue the income letter. If your embassy issues the income letter you must use that. Immigration will not accept baht deposits in this case.

I used the income method last year. I have my US SSI payments directly deposited into my Kasikornbank account. They will provide what’s called a “Bahtnet” transaction statement which is clearly detailed as a payment from SSA with amount and date. As long as they match with your bank statements you’re good.

Been doing it ever since the embassy stopped the income verification just make sure it shows as a foreign transaction

I do the income method for a marriage extension, but it is the same documentation.

A statement from a Thai bank back for one year showing a monthly deposit from a foreign source is required, along with proof of foreign income. I use an income letter printed from a US military website.

The other same bank stuff is required, updated bank book and letter.

You have to be on a yearly extension already and you need to meet the seasoning requirements for the extension you're currently on

Which means IF you used banked money method for the extension you're on now, you needed to keep 800K baht in the bank for 3 months after your extension was granted last year, and then the balance couldn't go below 400K the rest of the year)

AND

in addition to that you have to transfer in a minimum of 65K baht a month from abroad into a thai bank account in your name only, each month, every month for the previous 12 months before you apply for your next extension.

As you see you have to meet both seasoning requirements, the banked money method for the extension you're on AND the monthly income method for the extension you will be applying for

The immigration office will check (because you need a year print out of the detail transaction report) that you meet the seasoning for the extension you're on using banked money AND that you transferred in the 65K baht a month for the previous 12 months

You also need to make sure that all the transactions "code" in your bank book as international (OR you need to go to your bank and get a "credit advice" showing that the funds did originally come from abroad)