@Marek *********
*** The Multi Entry Tourist Visa is valid for 6 months, to be used for an unlimited number of entries during this period. The 6-month validity begins on the day the visa is issued.
Each time you enter the country you receive a 60-day stay permit, which can be extended by 30 more days, only once, at immigration for 1900 THB.
Before the 60 days or 90 days stay permits expire, you have to leave the country, and either short by a border bounce, or longer by staying in the neighboring country for a short holiday, re-enter Thailand and activate a new 60-days stay permit
Please do not confuse this: the duration of the stay permit is not the same as the duration of the visa validity.
If you leave and re-enter as close as possible before the 6-months visa validity expires, you will receive a 60-days stay permit stamp for the last time. This brings the total possible stay to almost 8 months.
You can theoretically get another 30-days extension on immigration, which brings the total stay to almost 9 months
You can only apply for and receive the 6-month multi-entry tourist visa in the country of your residence
A 60-day single entry tourist visa, however, can be obtained at any Thai diplomatic mission around the world
If you apply for a visa in your country using the e-visa system, don't be surprised if the day of your departure is getting closer and you haven't been issued a visa, yet
The embassies and consulates usually try to issue the visa as close as possible to your departure date so you donβt lose too many days of the 6-months visa validity