What are the requirements for maintaining a retirement visa in Thailand regarding the bank balance?

Does your dependent (wife) gets the extension (visa) as well!

Once I paid my internet bill from the 800K account. 429 Baht. Big mistake.

Even I transfered within 5 minutes the 429 Baht from my other account they fined me.

10.000 Baht.

400k applies to the spouse visa....

Put 800k in a Thai bank and just leave it there forever. If you can't afford to do that you can't afford to retire.

The "impact" is that you'll be denied your extension next year and have to leave Thailand and start over fresh.

If you are on a yearly extension of stay based on banked money method you need to have had the 800K baht in a thai bank account in your name only for 2 months before you apply for the extension, you need to keep that 800K baht in the account for 3 months after the extension is granted and then the balance cannot go below 400K baht the rest of the year.

𝗪𝗵𝗮𝘁 𝗶𝘀 𝘁𝗵𝗲 𝗶𝗺𝗽𝗮𝗰𝘁 𝗶𝗳 𝘁𝗵𝗲 𝗮𝗺𝗼𝘂𝗻𝘁 𝗶𝘀 𝗯𝗲𝗹𝗼𝘄 𝟰𝟬𝟬,𝟬𝟬𝟬 𝗯𝗮𝗵𝘁?

You failed to meet the requirements for the extension you're on and they'll catch it next year when you apply for the extension and turn in the year transaction detail statement