14 July 2026
Thailand's Treasury Department has revealed that some of the country's 10-baht coins-the highest-denomination coins in everyday circulation-have disappeared from the monetary system.
The 10-baht coin is bimetallic, featuring a silver-colored outer ring made from a copper-nickel-zinc alloy and a gold-colored center made from aluminum bronze (a copper-aluminum-nickel alloy). Because these metals have industrial value, some coins are no longer returning to Thailand after being taken to neighboring countries. While the Treasury Department has not confirmed where the missing coins end up, it says their disappearance has forced the government to continue minting replacement coins.
The 10-baht coin has been in circulation since 1988, when Thailand introduced its first bimetallic coin. Among collectors, the most sought-after editions are the 1988 first issue, the 1990 issue, and the 2007-2008 issues, which feature a redesigned royal portrait. The rare 1990 coin, with only 100 pieces minted, has sold for millions of baht in the collectors' market.
The Treasury Department plans to auction one 1990 10-baht coin to promote the collectors' market and raise revenue to help cover the cost of minting replacement coins.