Originally Posted by Trajan
I believe the 10 baht introductory fare is good until the Queen's Birthday (which is also Mother's Day) in August (forgot the exact date). According to the newspapers, all subway proceeds up to that date will go to the charities chosen by the King. After that date, a higher rate will apply.
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The 10 baht fare IS good through HRH the Queen's birthday, which is August 12. After that, there is a reduced rate of from 12 to 31 baht through July 3 next year, after which fares will rise to a rate from 14 to 36 baht.