When does the 3-month rule for maintaining 800,000 Baht start after extending a retirement visa in Thailand?

The question pertains to the timing of the 3-month rule for maintaining 800,000 Baht in a Thai bank account after extending a retirement visa. The general consensus among commenters is that the count could start either from the day the extension is granted or from the end date of the allowed stay, but this can vary by immigration office. To ensure compliance, it's recommended to verify with the local immigration office or err on the side of caution by maintaining the amount for three months post-extension.