@John ******
After customs, follow the signs “Floor B” and “Airport Rail Link” all the way down to the basement of the Suvarnabhumi airport.
Right across from the train to downtown Bangkok, there are THREE moneychangers. These three money changers in the airport basement unfortunately for you, are open from 5:30 a.m. to 11:00 p.m
NEVER, I say NEVER, change in the upper floors of the airport or inside the transit area. The difference is 3-5 Baht compared to the exchange rates in the basement.
These three moneychangers are: Happy Rich, SuperRich and Kasikorn. The SuperRich rate is the best you can get, in the whole of Thailand
If your credit card allows provision free withdrawals on ATM’s abroad, keep in mind that the daily spot rate of a VISA or MASTERCARD actually is a VERY GOOD rate!
Every Thai ATM will charge a 220.- Baht ATM fee. You need to draw as high an amount as possible, to spread this fee across a high amount. Most ATMs allow 20,000.- THB on a single withdrawal, the yellow ATMs (Krungsri Bank) allow a 30,000.- THB withdrawal
ATTENTION: if the ATM offers you to see the exchange rate on the screen, NEVER agree, always press NO. This is called “currency conversion” and it is –sadly – a legal scam and common on ATMs in touristic areas.
Sometimes this question shows as a negated question, that’s when you have to press “YES”