Government Savings Bank rate today: USD 33.12 — all branches

Government Savings Bank, in short

Government Savings Bank is a bank rather than a money changer, and it is on this site for one reason: its exchange counters at Samui Airport are the only counter the site tracks on Koh Samui. No other branch of the bank is listed anywhere else.

The site does not have confirmed opening hours for the counters, and Sunday opening is unverified. The board carries 17 currencies. Rates are read from gsb.or.th, the bank’s own published rates.

On 28 September 2026 its best US dollar buying rate was 33.18 baht against a mid-market rate of 33.42, 0.33 below the best rate tracked in Bangkok that day, or 330 baht on a thousand dollars. The Japanese yen best was 0.2079 against 0.213 in the capital. That gap is the island rate penalty in numbers, and the way to avoid it is to land on Samui with baht already changed on the mainland. Use the airport counter for what you need on arrival, if you arrive with nothing, and no more. The guide to Samui, Phangan and Tao and a cash plan made on the mainland is written around exactly this, and the island rate penalty explains how to sidestep it.