When should I go to immigration to extend my 60-day visa in Thailand for another 30 days?

@John *******

you only need 30 days extension if you don't want to leave the country. When you leave and get back in you get a new 60 days.

@John *******

You have a Multi Entry Tourist Visa METV It is valid for 6 months but you can get nearly 9 months if you time the last entry correctly. Every time you enter Thailand within the 6 months validity you will get 60 days permission to stay which can be extended by a further 30 days at a cost of 1900 baht. Others have already stated when the extension can be applied for. At the end of the 90 days, you have to leave Thailand but can immediately return for another 60 days and so on. The 6 month validity started the day you arrived in Thailand.

@John *******

you have a 60 day multiple entry tourist visa that is valid for 6 months but you can only stay a maximum of 60 days at a time ,you can leave Thailand as many times as you want in the 6 months that the visa is valid for and get 60 days on returning to Thailand so no need to do a 30 day extension .

I had this visa when I came in April this year ,you can also get 60days on the last day your visa is valid for to get 8 months from the visa,you can then either get a 30 day extension or do a boarder run and get a 60 day exemptions then extend it by 30 days giving you 9 months in total.

If you are going to get another 60 days just before the tourist visa runs out I wouldn't leave it to the last day I would do a boarder run about 1 week before the tourist visa runs out.